Reuse and Salvage of Water Pumps {1361} Caterpillar


Reuse and Salvage of Water Pumps {1361}

Usage:

769C 01X
Caterpillar Products
All Cat Engines

Introduction

Table 1
Revision  Summary of Changes in SEBF8418 
22  Added new serial number prefixes. 
20–21  Combined information from SEBF2126, SEBF2128, SEBF2157, SEBF8058, SEBF8110, SEBF8276, SEBF8740, SEBF9042, SEBF9267 added 9 part numbers and repaired 84 pixelated illustrations. 
19  Added new serial number prefixes. 

© 2019 Caterpillar All Rights Reserved. This guideline is for the use of Cat dealers only. Unauthorized use of this document or the proprietary processes therein without permission may be violation of intellectual property law.

Information contained in this document is considered Caterpillar: Confidential Yellow.

This Reuse and Salvage Guideline contains the necessary information to allow a dealer to establish a parts reusability program. Reuse and salvage information enables Caterpillar dealers and customers to benefit from cost reductions. Every effort has been made to provide the most current information that is known to Caterpillar. Continuing improvement and advancement of product design might have caused changes to your product which are not included in this publication. This Reuse and Salvage Guideline must be used with the latest technical information that is available from Caterpillar.

For technical questions when using this document, work with your Dealer Technical Communicator (TC). To report suspected errors, inaccuracies, or suggestions regarding the document, submit a form for feedback in the Service Information System (SIS Web) interface.

Canceled Part Numbers and Replaced Part Numbers

This document may not include canceled part numbers and replaced part numbers. Use NPR on SIS for information about canceled part numbers and replaced part numbers. NPR will provide the current part numbers for replaced parts.

Important Safety Information



Illustration 1g02139237

Work safely. Most accidents that involve product operation, maintenance, and repair are caused by failure to observe basic safety rules or precautions. An accident can often be avoided by recognizing potentially hazardous situations before an accident occurs. A person must be alert to potential hazards. This person should also have the necessary training, skills, and tools to perform these functions properly. Safety precautions and warnings are provided in this instruction and on the product. If these hazard warnings are not heeded, bodily injury or death could occur to you or to other persons. Caterpillar cannot anticipate every possible circumstance that might involve a potential hazard. Therefore, the warnings in this publication and the warnings that are on the product are not all inclusive. If a tool, a procedure, a work method, or operating technique that is not recommended by Caterpillar is used, ensure that it is safe for you and for other people to use. Ensure that the product will not be damaged or the product will not be made unsafe by the operation, lubrication, maintenance, or the repair procedures that are used.

------ WARNING! ------

Improper operation, lubrication, maintenance or repair of this product can be dangerous and could result in injury or death.

Do not operate or perform any lubrication, maintenance or repair on this product, until you have read and understood the operation, lubrication, maintenance and repair information.


Safety precautions and warnings are provided in this manual and on the product. If these hazard warnings are not heeded, bodily injury or death could occur to you or to other persons.

The hazards are identified by the safety alert symbol which is followed by a signal word such as danger, warning, or caution. The "WARNING" safety alert symbol is shown below.



Illustration 2g00008666

This safety alert symbol means:

Pay attention!

Become alert!

Your safety is involved.

The message that appears under the safety alert symbol explains the hazard.

Operations that may cause product damage are identified by "NOTICE" labels on the product and in this publication.

Caterpillar cannot anticipate every possible circumstance that might involve a potential hazard. The safety information in this document and the safety information on the machine are not all inclusive. Determine that the tools, procedures, work methods, and operating techniques are safe. Determine that the operation, lubrication, maintenance, and repair procedures will not damage the machine. Also, you must determine that the operation, lubrication, maintenance, and repair procedures will not make the machine unsafe.

The information, the specifications, and the illustrations that exist in this guideline are based on information which was available at the time of publication. The specifications, torques, pressures, measurements, adjustments, illustrations, and other items can change at any time. These changes can affect the service that is given to the product. Obtain the complete, most current information before you start any job. Caterpillar dealers can supply the most current information.

Summary

This guideline provides the most current information available on the disassembly, inspection, reuse, and assembly of water pump components. Engines. Many times, the installation of new water pump components is not necessary during an engine overhaul. Normally, used water pump components that are acceptable according to this guideline can give the same performance as new parts until the next overhaul. Use this guideline as the only source of reference to determine the reusability of the water pump.

To determine if water pump components can be used again, use the inspection specifications given in this guideline. Some components that do not meet the inspection specifications can be reconditioned to like new condition. Never reuse a component that does not meet all the reusability specifications.

Service Letters and Technical Information Bulletins


NOTICE

The most recent Service Letters and Technical Information Bulletins that are related to this component shall be reviewed before beginning work. Often Service Letters and Technical Information Bulletins contain upgrades in repair procedures, parts, and safety information that pertain to the parts or components being repaired.


References

Table 2
References 
Media Number  Title 
Channel1  "Why Reuse and Salvage Parts" 
https://channel1.mediaspace.kaltura.com/media/Why+Reuse+and+Salvage+Parts/0_ae9rhu2z
SEBF9238  Reuse and Salvage Guidelines, "Fundamentals of Arc Spray for Reconditioning Components" 
SEBF9240  Reuse and Salvage Guidelines, "Fundamentals of Flame Spray for Reconditioning Components" 
SEHS9031  Special Instructions , "Storage Procedure for Caterpillar Products" 
, SEPD0390  Special Instructions, "Handling Instructions For Water Pumps" 

Tooling and Equipment


NOTICE

Failure to follow the recommended procedure or the specified tooling that is required for the procedure could result in damage to components.

To avoid component damage, follow the recommended procedure using the recommended tools.


Table 3
Tooling and Equipment 
Part Number  Description 
1P-0458  Drive Plate 
1P-0510  Driver 
1U-6395  O-Ring Assembly Compound 
4B-5270  Washers 
4B-5271  Washers 
4B-5273  Washers 
5F-7465  Puller 
6V-1541  Quick Cure Primer 
6V-2010  Polishing Stone 
6V-6147  Polishing Wheel 
7N-8268  Installation Tool 
8S-4728  Bolt 
8T-7748  Polishing Wheel 
9N-0137  Gasket 
9S-3265  Retaining Compound 
438-8155  Adapter 
FT-1704  Impeller Installer 
FT-1732  Drill Fixture 
KBN-625  Cogsdill Knurling Tool 
K5-154  Cogsdill Knurling Tool 

Replacement Parts

Consult the applicable Parts Identification manual for your engine.

------ WARNING! ------

When replacement parts are required for this product Caterpillar recommends using Caterpillar replacement parts or parts with equivalent specifications including, but not limited to, physical dimensions, type, strength and material.

Failure to heed this warning can lead to premature failures, product damage, personal injury or death.


Nomenclature for C-9 and C9 Engines



Illustration 3g06281422
C-9 Engine Water Pump Nomenclature
(1) Cover
(2) Gasket
(3) Pump Impeller
(4) Seal Assembly
(5) Water Pump Housing
(6) Plug
(7) Water Pump Shaft
(8) Drive Pulley

Nomenclature for 3044, 3046, and 3064 Engines



Illustration 4g06281470
3044, 3046, and 3064 Engine Water Pump Nomenclature
(1) Water Pump Group
(2) Flange
(3) Shaft
(4) Retaining Ring
(5) Ball Bearing
(6) Impeller
(7) Spacer
(9) Ball Bearing
(10) Washer
(11) Seal
(13) Pulley

Nomenclature for 3176 Engines



Illustration 5g06281011
3176 Engine Water Pump Nomenclature
(1) Water Pump Housing
(2) Pump Retainer
(3) Gear (41 teeth)
(4) Ball Bearing
(5) Seal (Lip-type)
(6) Filter
(7) Water Seal Assembly
(8) O-ring Seal
(9) Pump Impeller
(10) Water Pump Shaft
(11) Pump Cover

Nomenclature for 3208 Engines



Illustration 6g06280354
3208 Front housing nomenclature.
(1) Bearing Bore
(2) Snap Ring Groove
(3) Pulley Face
(4) Ears
(5) Drain Hole


Illustration 7g06280357
3208 Rear housing nomenclature.
(6) Pilot Diameter
(7) Seal Bore
(8) Gasket Face
(9) Seal Bore Spot Face

Nomenclature for 3500 Engines

Jacket Water Pumps

Changes in water pumps over the years have incorporated the following changes:

  • Press on impeller vs bolt on impeller

  • Ceramic seal vs steel seal

  • Pinned seal retainer

  • Straight shaft vs tapered

Older Style Water Pumps



Illustration 8g02028113
Typical example of an older style water pump.
(1) Seal Group
(2) Water Pump Seal
(3) Retainer
(4) Impeller
(5) Washer
(6) Nut
(7) Seal - Lip Type
(8) Ball
(9) Shaft Assembly
(10) Washer - Thrust
(11) Filter - Foam
(12) Plug
(13) Identification Plate
(14) Housing Assembly

Current Water Pumps

Current style water pump groups are used on all Commercial Engines and on all Machine Engines. The current water pump groups differ from an older style due to updates in the ring assembly, the seal group, and the shaft assembly. These new components provide the water pump group with increased resistance to damage from shock loads and leaking that typically occur during shipping, handling, and installation.



Illustration 9g06280903
Typical example of a water pump.
(1) Plug - Pipe
(2) Seal Lip Type
(3) Seal Assembly
(4) Seal O-Ring
(5) Seal O-Ring
(6) Bolt
(7) Impeller
(8) Adapter
(9) Washer - Thrust
(10) Bolt - Socket Head
(11) Shaft
(12) Washer
(13) Plug O-Ring
(14) Plug Pipe
(15) Housing Assembly

Nomenclature for 3600 Engines

Earlier Water Pumps



Illustration 10g02309516
Example of an earlier water pump

Later Water Pumps



Illustration 11g02309594
Example of a later water pump

Table 4
Water Pump Applications for 3600 Engines 
Earlier Pump Part Number  Later Pump Part Number  Pump Type 
1W-2548  7E-3172
304-4942
457-5092 
Fresh Water 
2W-0465  7E-8179
304-4948
457-5098 
Fresh Water 
7W-0045  7E-4358
304-4957
367-6095
480-7095 
Sea Water 

Handling Procedure

Correct handling of the water pumps used is necessary critical to prevent damage. Improper handling of the water pumps can cause cracking of the seal face group. Damage to the face seals may cause the water pumps to leak. Relative movement between the shaft and the housing may allow the drive shaft to contact the face seal. If contact occurs, the face seal will be damaged.

To prevent damage to the face seal, follow the proper water pump handling procedures.

  • Do NOT move the water pump shaft in respect to the water pump housing.

  • Do NOT set the water pump down with the shaft on the ground.

  • Do NOT handle the water pump by the shaft.

  • Do NOT use a hammer, mount, or other device on the water pump or on the shaft that might cause movement between the shaft and the housing.

Cleaning Procedure

After disassembly, the water pump will need to be cleaned thoroughly prior to inspection. Use the following steps to ensure that the various parts are properly cleaned without damaging the parts.

------ WARNING! ------

Personal injury can result when using cleaner solvents.

To help prevent personal injury, follow the instructions and warnings on the cleaner solvent container before using.


Housing and Steel Parts

Use a hot detergent spray or place parts in a high-pressure cabinet washer to clean dirt and grease from the housing and impeller. Remove any corrosion or debris with steel shot. If steel shot is unavailable, use glass beads with 550 kPa (80 psi) to 620 kPa (90 psi) air pressure. Corrosion and debris can also be removed from the housing with steel shot blast.

Inspect all areas of the housing for cracks. Carefully inspect the flange by the bolt holes and the sealing surfaces.

Inspect the areas of the housing that contains the seals. Any type of pitting is not allowed in the area that contains the seal. If the area is pitted, the pump could leak.

Shaft


NOTICE

Do not use glass beads or shot blast to clean the shaft. This will damage the bearing and seal surfaces, making the shaft unusable.


Clean the shaft with solvent only. Be careful not to damage the bearing and seal surfaces. Light scratches can be removed with a polishing wheel. A 6V-6147 Polishing Wheel or 8T-7748 Polishing Wheel can also be used to clean the shaft. Light scratches can be removed with a polishing wheel.

Whenever the water pump is removed from the engine, protect the exposed shaft with the plastic from shipping.


NOTICE

Do not reuse a shaft that has grooves or wear steps. Also, do not reuse a shaft that has scratches remaining after polishing.


Impeller

Examine the blades of the impeller for damage and wear. The impeller must pass a visual inspection first followed by a bore specification. Only use the impeller again if it passes both the visual inspection and specification inspection.

Inspect the outside tip of the impeller blades for scratches or erosion. If the tips of the blades show signs of damage, the impeller must be replaced.

Inspect the entire length of each blade for erosion or cracks. If there is any damage to the blades, the impeller must be replaced.

Inspect the seal face for pitting, erosion, or scratches. If there is any damage to the seal face, the impeller must be replaced.


NOTICE

Do not reuse an impeller that has any visible damage or wear.


Aluminum Parts

The aluminum parts should be cleaned with a steam pressure washer or a high-pressure cabinet washer with an aluminum-safe solvent. Then remove corrosion and debris with glass beads, 80 to 150 micron (size 10).

Measurement Requirements


NOTICE

Precise measurements shall be made when the component and measurement equipment are at 20° (68° F). Measurements shall be made after both the component and measurement equipment have had sufficient time to soak at 20° (68° F). This will ensure that both the surface and core of the material is at the same temperature.


Inspection and Salvage Procedures

After cleaning, a visual inspection helps to identify which parts can be reused and which cannot. The three critical areas of inspection are the housing, the impeller shaft, and the impeller.

Housing for C-9 and C9 Engines



Illustration 12g06281439
Check seal diameter (D)

Table 5
Seal Diameter Specifications for Water Pump Housing for C-9 and C9 Engines 
Item  Dimension 
(D)  36.462 ± 0.013 mm
(1.4355 ± 0.0005 inch) 

  1. Inspect all areas of the housing for cracks. Carefully inspect the flange areas by the bolt holes and the sealing surfaces.

  2. Check the bearing and seal bores for pitting. Slight pitting in the bearing area is permitted, but not in the seal area.

Housing for 3044, 3046, and 3064 Engines



Illustration 13g06281483

Table 6
Housing for 3044, 3046, and 3064 Engines(1) 
Bore Size (D)  Bore Size (E) 
52.000 + 0.018 − 0.012 mm
(2.0472 + 0.0007 − 0.0005 inch) 
62.000 + 0.018 − 0.012 mm
(2.4409 + 0.0007 − 0.0005 inch) 
(1) The housing is nonserviceable. You must purchase the complete pump assembly if the housing is not reusable.

Housing for 3176 Engines



Illustration 14g06281022

Table 7
Seal Diameters for Housing on 3176 Engines 
Callout  Dimension 
53.98 ± 0.03 mm
(2.12519 ± 0.00118 inch) 
36.445 ± 0.025 mm
(1.43484 ± 0.00098 inch) 

  1. Inspect all areas of the housing for cracks. Carefully inspect the flange areas by the bolt holes and the sealing surfaces.

  2. Check the bearing and seal bores for pitting. Slight pitting in the bearing area is permitted, but not in the seal area.

  3. Examine the O-ring groove for pitting, scratches, or other damage. Do not reuse a housing that has a damaged O-ring groove.

Housing for 3208 Engines



Illustration 15g06280398
Wear step in the housing bore.

Use again - after the wear step is removed by applying thermal metal spray. For more information, refer to "Thermal Spray Procedures for Water Pump Housing Bore on 3208 Engines".



Illustration 16g06280403
Pits in the bearing bore.

Use again



Illustration 17g06280414
Gouges in the bearing bore.

Use again - after the raised (high) areas are removed with a half-round file.



Illustration 18g06280425
Scratches in the bearing bore.

Use again



Illustration 19g06280432
Damage to the snap ring groove.

Use again - after burrs are removed with a 6V-2010 Polishing Stone.



Illustration 20g06280435
Damage to the pulley face caused by forcing screws.

Use again



Illustration 21g06280438
Nick on the edge of the housing.

Use again - after burrs on the gasket face are removed with a file.



Illustration 22g06280444
Pits on the gasket face.

Use again - only if the flat seal length from the pilot diameter to the edge of the housing in any area is more than 3.0 mm (0.11811 inch).



Illustration 23g06280449
Erosion (gradual wear) on the pilot diameter.

Use again



Illustration 24g06280453
Pits and scratches on the seal bore spotface.

Use again



Illustration 25g06280455
Nicks in the seal bore.

Use again - after raised material is removed carefully with a half-round file.

Note: Do not use the housing again if the seal length from the front to the rear of the seal bore in any area is less than 2.0 mm (0.07874 inch).



Illustration 26g06280457
Ear broken from the housing.

Use again - only if there is no damage to the web, and after the ear is welded.



Illustration 27g06280460
Pit in the seal bore.

Use again

Note: Do not use the housing again if the seal length from the front to the rear of the seal bore in any area is less than 2.0 mm (0.07874 inch).

Housing Salvage Procedure for 3208 Engines

Salvage Broken Ears

A housing with a broken ear, as shown in Illustration 26, can still be used, if the web is not damaged. The salvage procedure is as follows:



    Illustration 28g06280513
    Ear ground flat beyond the bolt hole.

  1. Grind the broken ear(s) flat beyond the hole as shown in Illustration 28.


    Illustration 29g06280515
    Housings in position on the welding table. Two housings are shown in this photo; it is a recommendation that a minimum of two housings be salvaged at one time for maximum efficiency.

  2. Install the housing(s) to the welding table with the broken ear(s) over an aluminum plate, as shown in Illustration 29.


    Illustration 30g06280521
    If two housings are salvaged at one time, weld one ear and then let the weld cool while the other ear is welded. Use a 3/16" low amp electrode for cast iron.

  3. Build up (add layers to) the ear(s) with weld. Let the weld cool between each layer and remove weld slag before each application. See Illustration 30.

    Note: Use a good quality welding rod made for cast iron welding with an AWS specification of ENi CI.



    Illustration 31g06280536
    Gasket face of the ear.

  4. Turn the housing(s) over and fill the holes in the gasket face of the ear(s) with weld. See Illustration 31. Correct any cracks with a V-groove filled with weld.


    Illustration 32g06280541
    Follow the outer shape of the 9N-0137 Gasket as a guide to grind the ear to the correct shape.

  5. Grind the gasket face smooth. Use a 9N-0137 Gasket as a guide for the shape of the ear. See Illustration 32.


    Illustration 33g06280546
    Ear and bolt face after grinding.

  6. Grind the ear and bolt face. See Illustration 33.


    Illustration 34g06280548
    The last step: drill a hole in the welded ear.

  7. Use an FT–1732 Drill Fixture and a 10.71 mm (27/6 inch) drill bit to cut a hole in the welded ear.

Housing for 3500 Engines

Visually inspect the water pump housing, then measure the sealing bores with a dial bore gauge.

Housing Inspection

First perform a visual inspection on the entire housing. Only use the housing again if it passes the visual inspection. Inspect for scratches, cracks, dings, damage, corrosion, and pitting. Some slight pitting in the bearing area is permitted but not in the sealing areas. Next, inspect the O-ring surfaces for nicks and dings. Finally, inspect the threaded holes for damaged or stripped threads.

Housing Specifications

If the water pump has passed the visual inspection, then measure the diameter of the seal bores. Use the housing again only if the measurements meet the specifications.



Illustration 35g06280463
Typical water pump seal bore locations
(A) Oil Seal Bore
(B) Water Seal Bore

Table 8
Seal Diameters for Housing on 3500 Engines 
Callout  Dimension 
44.5 ± 0.03 mm
(1.752 ± 0.001 inch) 
32.69 ± 0.05 mm
(1.287 ± 0.002 inch) 

Housing for 3600 Engines

Earlier Housings



Illustration 36g06280896

Table 9
Earlier Housing Dimensions for 3600 Engines 
Number  Description  Measurement 
Depth of Bearing from Surface of Pump Housing  2.5 ± 0.5 mm
(0.10 ± 0.02 inch) 
Bearing Bore Diameter  64.957 ± 0.040 mm
(2.5574 ± 0.0016 inch) 

Later Housings



Illustration 37g06280909

Table 10
Later Housing Dimensions for 3600 Engines 
Number  Description  Measurement 
Installation Depth of Bearing  112.5 ± 1 mm
(4.43 ± 0.04 inch) 
Installation Depth of Bearing  92.5 ± 1 mm
(3.64 ± 0.04 inch) 
Installation Depth of Bearing  20 ± 1 mm
(0.79 ± 0.04 inch) 
Front Bearing Bore Diameter  65.040 ± 0.040 mm
(2.5606 ± 0.002 inch) 
Rear Bearing Bore Diameter  89.080 ± 0.040 mm
(3.5070 ± 0.0016 inch) 

Shaft for C-9 and C9 Engines



Illustration 38g06281450
C-9 and C9 Engine Water Pump Shaft
(A) Impeller and water seal diameter
(B) Bearing diameter
(C) Pulley diameter

Table 11
Water Pump Shaft Nomenclature and Specifications for C-9 and C9 Engines 
Item  Description  Dimension 
(A)  Impeller and water seal diameter  15.918 + 0.000 - 0.013 mm
(0.6267 + 0.0000 - 0.0005 inch) 
(B)  Bearing diameter  38.120 + 0.000 - 0.013 mm
(1.5008 + 0.0000 0.0005 inch) 
(C)  Pulley diameter  18.961 + 0.000 - 0.013 mm
(0.7465 + 0.0000 0.0005 inch) 

Shaft for 3044, 3046, and 3064 Engines



Illustration 39g01212524

Table 12
Shaft for 3044, 3046, and 3064 Engines 
Part Number  Diameter (A)  Diameter (B) 
5I-7695  25.000 + 0.011 − 0.002 mm
(0.9843 + 0.0004 − 0.0001 inch) 
13.000 + 0.000 − 0.015 mm
(0.5118 + 0.0000 − 0.0006 inch) 
178-6635
183-8233 
25.000 + 0.011 − 0.002 mm
(0.9843 + 0.0004 − 0.0001 inch) 
15.500 + 0.000 − 0.013 mm
(0.6102 + 0.0000 − 0.0005 inch) 


Illustration 40g06281494

Table 13
Flange for 3044, 3046, and 3064 Engines 
Part Number  Bore Size (F) 
5I-7696  24.946 to 24.963 mm
(0.9821 to 0.9828 inch) 

Shaft for 3176 Engines



Illustration 41g06281384
3176 Engine Water Pump Shaft
(A) Bearing and Gear diameter
(B) Oil Seal diameter
(C) Impeller and Water Seal diameter

Table 14
Shaft Dimensions for 3176 Engines 
Number  Description  Measurement 
Bearing and Gear diameter  29.987 ± 0.008 mm
(1.18059 ± 0.00031 inch) 
Oil Seal diameter  32.0 ± 0.5 mm
(1.25984 ± 0.01969 inch) 
Impeller and Water Seal diameter  15.912 ± 0.006 mm
(0.62646 ± 0.00024 inch) 

Shaft for 3208 Engines

Nomenclature



Illustration 42g06280609
3208 Engine Water Pump Shaft
(14) Bearing diameter
(15) Seal diameter
(16) Bearing shoulder
(17) Pulley end.


Illustration 43g06280813
Remove debris and corrosion from the shaft with a 6V-6147 Polishing Wheel.


NOTICE

Use the 6V-6147 Polishing Wheel only. Other polishing wheels can remove too much material and damage the shaft.




Illustration 44g06280820
Scratch along the length of the seal diameter.

Use again - only if the scratch can be removed with a 6V-6147 Polishing Wheel.



Illustration 45g06280823
Groove near the pulley end of the bearing diameter.

Use again



Illustration 46g06280827
Wear step along the circumference of the bearing diameter.

Do not use again

Shaft for 3500 Engines

After cleaning and if necessary polishing dimensional checks of the water pump shaft. Refer to Table 15 for the critical dimensions.



Illustration 47g06281548
Former style shafts with tapered area.

The former style shafts as shown in Illustration 47 are not serviceable and must be replaced with a newer style press in shaft. The tapered shaft is easily distinguishable by the tapered area as indicated in Illustration 47. If the former tapered style shaft is discovered, then the water pump can still be salvaged. Currently there are three distinct types of current style shafts, the styles are shown in Illustrations 48,49, and 50.

A current style shaft must replace the tapered shaft. If the impeller is to be salvaged, then the tapered impeller bore must be machined straight. Salvaging the impeller bore can be found in the "Impeller Salvage for 3500 Engines" section within this document.



Illustration 48g03444156


Illustration 49g03487319


Illustration 50g06281550

  1. Measure the critical diameters. Refer to Illustrations 48,49, and 50 to find the applicable shaft style.

    Current style shafts have critical dimensional areas to check. The critical areas are called out in Illustrations 48,49, and 50. Also, refer to Table 15 for the correct diameters related to the applicable shaft. These dimensions are critical to obtain a water tight seal and a friction fit at reassembly.

  2. Measure runout. Refer to Table 15 for the correct diameters related to the applicable shaft.

    Measure runout where referenced in Table 15. A shaft that is out of specifications in runout will potentially damage seals prematurely, create a water leak, and can cause a low hour failure.

Table 15
Water Pump Shaft Reuse Specifications for 3500 Engines 
Shaft Part Number  (A)  (B)  (C)  (D)(1)  (E) 
212-8178  N/A  Diameter
25.0 ± 0.5 mm
(0.98 ± 0.02 inch)
Runout
N/A 
Diameter
28.00 ± 0.25 mm
(1.102 ± 0.010 inch)
Runout
N/A 
Diameter
31.75 ± 0.08 mm
(1.250 ± 0.003 inch)
Runout
0.05 mm
(0.002 inch) 
Diameter
19.05 ± 0.013 mm (0.7500 ± 0.0005 inch)
Runout
0.05 mm
(0.002 inch) 
212-8180  Diameter
43.00 ± 0.02 mm (1.693 ± 0.001 inch)
Runout
0.05 mm
(0.002 inch) 
Diameter
41.00 ± 1.50 mm (1.614 ± 0.060 inch)
Runout
N/A 
Diameter
47.00 ± 0.02 mm (1.850 ± 0.001 inch)
Runout
N/A 
Diameter
31.75 ± 0.08 mm (1.250 ± 0.003 inch)
Runout
0.05 mm
(0.002 inch) 
Diameter
25.400 ± 0.013 mm (1.000 ± 0.001 inch)
Runout
0.05 mm
(0.002 inch) 
235-4539
258-8726
263-1052
428-8019 
N/A  Diameter
31.03 ± 0.18 mm (1.222 ± 0.007 inch)
Runout
N/A 
Diameter
33.325 ± 0.025 mm (1.312 ± 0.001 inch)
Runout
N/A 
Diameter
27.00 ± 0.08 mm (1.063 ± 0.003 inch)
Runout
0.05 mm
(0.002 inch) 
Diameter
25.40 ± 0.01 mm (1.00000 ± 0.00 inch)
Runout
0.05 mm
(0.002 inch) 
381-7343  N/A  Diameter
31.03 ± 0.18 mm (1.222 ± 0.007 inch)
Runout
N/A 
Diameter
40.010 ± 0.025 mm (1.5752 ± 0.0010 inch)
Runout
N/A 
Diameter
34.00 ± 0.08 mm (1.339 ± 0.003 inch)
Runout
0.05 mm
(0.002 inch) 
Diameter
31.750 ± 0.013 mm (1.2500 ± 0.0005 inch)
Runout
0.05 mm
(0.002 inch) 
430-9695  N/A  Diameter
25.00 ± 0.05 mm (0.984 ± 0.002 inch)
Runout
N/A 
Diameter
28.160 ± 0.013 mm (1.1087 ± 0.0005 inch)
Runout
N/A 
Diameter
31.75 ± 0.08 mm (1.250 ± 0.003 inch)
Runout
0.05 mm
(0.002 inch) 
Diameter
19.05 ± 0.013 mm (0.7500 ± 0.0005 inch)
Runout
0.05 mm
(0.002 inch) 
(1) The oil seal diameter can be machined 0.025 mm (0.001 inch) undersized.

If the water pump shaft still shows signs of light wear or rust after cleaning, polishing, and inspecting, then an attempt can be made to machine the shaft. The oil seal diameter portion is the only section that can be machined undersized. The shaft must be machined using a grinder, do not attempt to machine the shaft with a lathe. If machining the oil seal diameter, ensure that the following criteria are met:

  • Use a grinder wheel that can machine the entire surface of the oil seal. A minimum wheel width of 10.50 mm (0.413 inch) is recommended.

  • Remove as minimal amount of material as necessary to remove the damage to the shaft.

  • The shaft can be machined to a minimal diameter 0.025 mm (0.001 inch) undersized.

  • The surface finish must be within 0.25 to 0.50 microns to be acceptable.

  • After machining, the shaft must be polished, cleaned, and measured.

Shaft for 3600 Engines

Earlier Shafts



Illustration 51g06280918

Table 16
Earlier Shaft Dimensions for 3600 Engines 
Number  Description  Measurement 
Width of Groove in Shaft  12 ± 0.05 mm
(0.472 ± 0.002 inch) 
Shaft Diameter at Surface of Carbon Seal  44.45 ± 0.20 mm
(1.750 ± 0.008 inch) 
Diameter of Impeller Shaft  64.85 ± 0.020 mm
(2.553 ± 0.0008 inch) 
Diameter of Support End of Shaft  44.88 ± 0.02 mm
(1.767 ± 0.0008 inch) 


Illustration 52g06280932

Table 17
Earlier Plate Dimensions for 3600 Engines 
Number  Description  Measurement 
Width of the Plate  11.85 ± 0.05 mm
(0.46653 ± 0.00197 inch) 


Illustration 53g06280944
Fresh water shaft support


Illustration 54g06280958
Sea water shaft support

Table 18
Earlier Shaft Support Dimensions for 3600 Engines 
Number  Description  Measurement 
Depth of Bearing from Surface of Support  2.5 ± 0.5 mm
(0.10 ± 0.02 inch) 
Support Bore Diameter  51 ± 0.02 mm
(2.00 ± 0.001 inch) 


Illustration 55g06280960

Table 19
Earlier Shaft End Play Dimension for 3600 Engines 
Number  Description  Measurement 
End play of Impeller Shaft  0.05 mm
(0.002 inch)
to 0.25 mm
(0.010 inch) 

Later Shafts



Illustration 56g06280921

Table 20
Later Shaft Dimensions for 3600 Engines 
Number  Description  Measurement 
Width of Groove in Shaft  12 ± 0.05 mm
(0.472 ± 0.002 inch) 
Shaft Diameter at Surface of Carbon Seal  44.45 ± 0.20 mm
(1.750 ± 0.008 inch) 
Diameter of Impeller Shaft  64.85 ± 0.020 mm
(2.553 ± 0.0008 inch) 
Diameter of Support End of Shaft  88.878 ± 0.013 mm
(3.4991 ± 0.0005 inch) 


Illustration 57g06280932

Table 21
Later Shaft Dimensions for 3600 Engines 
Number  Description  Measurement 
Width of the Plate  11.85 ± 0.05 mm
(0.46653 ± 0.00197 inch) 


Illustration 58g06280966

Table 22
Later Shaft End Play Dimension for 3600 Engines 
Number  Description  Measurement 
End play of Impeller Shaft  0.05 mm
(0.002 inch)
to 0.25 mm
(0.010 inch) 

Impeller for C-9 and C9 Engines



Illustration 59g02151114
Impeller for C-9 and C9 Engines
(9) Impeller blades

  1. The outside tip of impeller blades (9), should not have any grooves, scratches, or erosion.

  2. Check the entire length of each impeller blade for erosion or cracks. Damage to the blades cannot be repaired and the impeller must be replaced.

  3. Use a GO NO/GO plug gauge to check the diameter of the impeller bore. The GO (green) end of the plug gauge should be 15.872 mm (0.62488 inch) in diameter. The NO GO (red) end should be 15.885 mm (0.62539 inch).

  4. If the green end of the gauge does not fit in the impeller bore, the impeller can be used again as is, if it is acceptable according to subsequent visual inspections.

  5. If the green end of the gauge fits through the impeller bore, check to see if the red end of the gauge fits in the bore.

  6. If the red end of the gauge fits through the impeller bore, do not use the impeller again.

  7. If the red end of the gauge does not fit in the bore, refer to the "Impeller Salvage for C-9 and C9 Engines" section.

Impeller Salvage for C-9 and C9 Engines

Bore Salvage

Prior to reassembly, the bore in the impeller must be knurled. The purchase of a special tool is necessary to perform this procedure. Salvaging impellers will only be cost effective when many impellers can be salvaged at the same time.



Illustration 60g06280597
Cogsdill KBN-625 Knurling Tool.

The salvage procedure is as follows:

  1. Turn the adjustment screw of the Cogsdill KBN-625 Knurling Tool. until the distance across the roll is 16.433 mm (0.64697 inch).


    Illustration 61g06280599
    Knurl the bore at approximately 265 rpm 0.254 mm/revolution (265 rpm .010"/revolution).

  2. Knurl the bore at approximately 265 rpm 0.254 mm/revolution (265 rpm .010"/revolution) on a lathe or drill press. Hand feed can be used. Use cutting oil or coolant during the procedure.

  3. After the knurling procedure, use a plug gauge to check that the bore dimension is correct.

  4. Before assembly, clean the bore and mating shaft with 6V-1541 Quick Cure Primer and put 9S-3265 Retaining Compound on both parts.

Impeller for 3044, 3046, and 3064 Engines



Illustration 62g06281498

Table 23
Impeller for 3044, 3046, and 3064 Engines 
Part Number  Bore Size (C) 
5I-7694  13.000 + 0.047 − 0.062 mm
(0.5118 + 0.0019 − 0.0024 inch) 
178-6634  15.500 + 0.035 − 0.062 mm
(0.6102 + 0.0014 − 0.0024 inch) 

Impeller for 3176 Engine



Illustration 63g06281392
Impeller
(12) Seal face
(13) Impeller blades

  1. The outside tip of impeller blades (13), should not have any grooves, scratches, or erosion.

  2. Check the entire length of each impeller blade for erosion or cracks. Damage to the blades cannot be repaired and the impeller must be replaced.

  3. Inspect seal face (12) for pitting, erosion, and scratches. If there is any damage to the seal face, the impeller must be replaced.

  4. Use a GO NO/GO plug gauge to check the diameter of the impeller bore. The GO (green) end of the plug gauge should be 15.893 mm (0.62571 inch) in diameter. The NO GO (red) end should be 15.985 mm (0.62933 inch).

  5. If the green end of the gauge does not fit in the impeller bore, the impeller can be used again as is, if it is acceptable according to subsequent visual inspections.

  6. If the green end of the gauge fits through the impeller bore, check to see if the red end of the gauge fits in the bore.

  7. If the red end of the gauge fits through the impeller bore, do not use the impeller again.

  8. If the red end of the gauge does not fit in the bore, refer to the "Impeller Salvage for C-9 and C9 Engines" section.

Impeller Salvage for 3176 Engines

Bore Salvage

Prior to reassembly, the bore in the impeller must be knurled. The purchase of a special tool is necessary to perform this procedure. Salvaging impellers will only be cost effective when many impellers can be salvaged at the same time.



Illustration 64g06280597
Cogsdill KBN-625 Knurling Tool.

The salvage procedure is as follows:

  1. Turn the adjustment screw of the Cogsdill KBN-625 Knurling Tool. until the distance across the roll is 16.433 mm (0.64697 inch).


    Illustration 65g06280599
    Knurl the bore at approximately 265 rpm 0.254 mm/revolution (265 rpm .010"/revolution).

  2. Knurl the bore at approximately 265 rpm 0.254 mm/revolution (265 rpm .010"/revolution) on a lathe or drill press. Hand feed can be used. Use cutting oil or coolant during the procedure.

  3. After the knurling procedure, use a plug gauge to check that the bore dimension is correct.

Impeller for 3208 Engine



Illustration 66g06280553
Rear Impeller
(10) Shaft Bore
(11) Seal Bore
(12) Blade
(13) Back Face

Two areas of the impeller must be measured: the bore and the blade.



Illustration 67g06280559
Check the impeller bore dimension with the green end of the gauge first.

Use the type of plug gauge that has a gauge at each end to check the diameter of the impeller bore. See Illustration 67. (One end of the plug gauge is green and has a 15.870 mm (0.62480 inch) diameter; the other end is red and has a 15.962 mm (0.62842 inch) diameter.

  1. If the green end of the gauge does not fit in the impeller bore, the impeller bore can be used again as is, if it is acceptable according to the remainder of the visual inspections.

  2. If the green end of the gauge does fit through the impeller bore, check to see if the red end of the gauge fits in the bore.

  3. If the red end of the gauge does fit through the impeller bore, do not use the impeller again.

  4. If the red end of the gauge does not fit in the bore.

Use a scale to measure the distance from the back face of the impeller to the top of the blade. See Illustration 68. If this distance is more than 15.88 mm (0.62520 inch). If this distance is less than 15.88 mm (0.62520 inch), do not use the impeller again.

Also, measure blade from leading edge to trailing edge. See Illustrations 68 through 69. If this dimension is less than 4.76 mm (0.18740 inch) at any location, do not use the impeller again.


NOTICE

Impellers with blade wear must be installed with an FT–1704 Impeller installer to give acceptable performance.




Illustration 68g06280564
Measure the blade height.


Illustration 69g06280567
Tip erosion is within the "Use again minimum" dimension.
(A) Leading Edge
(B) Trailing Edge

Use again - if the dimension is greater than 4.76 mm (0.18740 inch) from the leading edge to the trailing edge.



Illustration 70g06280573
Some tip erosion but area of tip is greater than the "Use again minimum" dimension.

Use again



Illustration 71g06280576
Tip erosion greater than the "Use again minimum" dimension.

Do not use again



Illustration 72g06280579
Wear step on the back face of the impeller.

Use again



Illustration 73g06280581
Damage to the shaft bore.

Use again



Illustration 74g06280583
Erosion of blades.

Do not use again



Illustration 75g06280587
Face damage.

Do not use again



Illustration 76g06280588
Porosity.

Do not use again



Illustration 77g06280589
Groove in blade tip (C) and back plate wear (D).

Do not use again



Illustration 78g06280591
Crack in a blade.

Do not use again



Illustration 79g06280593
Broken blade.

Do not use again

Impeller Salvage for 3208 Engines

Bore Salvage

The purchase of the special tool that this procedure needs is practical only if approximately twenty impellers can be salvaged.



Illustration 80g06280597
Cogsdill K5-154 Knurling Tool.

The salvage procedure is as follows:

  1. Turn the adjustment screw of the Cogsdill K5-154 Knurling Tool until the distance across the roll is 16.41 mm (0.64606 inch).


    Illustration 81g06280599
    Knurl the bore at approximately 265 rpm 0.254 mm/revolution (265 rpm .010"/revolution).

  2. Knurl the bore at approximately 265 rpm 0.254 mm/revolution (265 rpm .010"/revolution) on a lathe or drill press. Hand feed can be used. Use cutting oil or coolant during the procedure.

  3. After the knurling procedure, use a plug gauge to check that the bore dimension is correct.


    Illustration 82g06280602

  4. Before assembly, clean the bore and mating shaft with 6V-1541 Quick Cure Primer and put 9S-3265 Retaining Compound on both parts.

Blade Salvage

To salvage the blade, grind to remove the tips on the inside of the blades. Remove any burrs from blade edges.



Illustration 83g06280604


Illustration 84g06280605
Remove the burrs from blade edges when grinding blade tips.


Illustration 85g06280606

Impeller for 3500 Engine

Impeller Visual Inspection



Illustration 86g06281554
(1) Impeller Blade
(2) Seal Face


Illustration 87g03449876
Excessive damage to impeller bore.
Do not reuse.

Examine the blades of the impeller for damage and wear. Around the fins inspect for excessive damage, pitting, erosion, wear, and cracked or broken fins. Examine the bore for excessive wear, galling, scaring. Do not reuse an impeller that has any visible damage or wear refer to Illustration 87. If upon inspection the impeller blades do not meet reusability specification, then replace the impeller.

  • The outside tip of the impeller blades should not have any grooves, scratches, or erosion.

  • Check the entire length of each impeller blade for erosion or cracks. Damage to the blades cannot be repaired and the impeller must be replaced.

  • Inspect seal face for pitting, erosion, and scratches. If there is any damage to the seal face, the impeller must be replaced.

Impeller Bore Specification

The impeller bore must meet certain diameter and surface finish specifications if it is to be reused without machining. The impeller bore (B) must be within −.05 ± 0.013 mm (0.0020 ± 0.0005 inch) larger than the shaft diameter. Refer to Illustration 88 for the location of the critical bore areas and Table 24 for the critical diameters. Inspect and note the diameter of bore (A) and bore (B).



Illustration 88g06281557
(A) Seal bore diameter
(B) Shaft bore diameter

Table 24
Water Pump Impeller Bore Specifications for 3500 Engine 
Part Number  Seal Bore Diameter
(A) 
Shaft Bore Diameter
(B) 
Salvaged Bore Diameter
C 
212-8181  34.3 ± 0.51 mm
(1.350 ± 0.020 inch) 
19 ± 0.013 mm
(0.7480 ± 0.0005 inch) 
N/A 
212-8183  34.3 ± 0.51 mm
(1.350 ± 0.020 inch) 
19 ± 0.013 mm
(0.7480 ± 0.0005 inch) 
19 ± 0.013 mm
(0.7480 ± 0.0005 inch) 
212-8184  42.9 ± 0.5 mm
(1.69 ± 0.020 inch) 
25.342 ± 0.013 mm
(0.9977 ± 0.0005 inch) 
25.315 ± 0.02 mm
(0.9967 ± 0.0008 inch) 
212-8186  42.9 ± 0.5 mm
(1.69 ± 0.020 inch) 
25.342 ± 0.013 mm
(0.9977 ± 0.0005 inch) 
N/A 
212-8187  42.9 ± 0.5 mm
(1.69 ± 0.020 in) 
25.342 ± 0.013 mm
(0.9977 ± 0.0005 inch) 
25.315 ± 0.02 mm
(0.9967 ± 0.0008 inch) 
235-4541  42.9 ± 0.5 mm
(1.69 ± 0.020 inch) 
25.35 ± 0.012 mm
(0.9980 ± 0.0005 inch) 
N/A 
268-1846
390-6235 
48.6 ± 0.5 mm
(1.91 ± 0.02 inch) 
31.705 ± 0.013 mm
(1.2482 ± 0.0005 inch) 
N/A 
258-8727
313-2760 
N/A  25.35 ± 0.012 mm
(0.9980 ± 0.0005 inch) 
N/A 

Impeller Salvage for 3500 Engines

An impeller with a tapered shaft can be salvaged and machined to have a straight shaft. The machining operation involves machining the bore, de-burring the bore, and balancing the impeller.



    Illustration 89g06281558
    Critical dimensions for machining the bore
    (A) Angle of chamfer: 25°
    (B) Depth of chamfer: 1.25 ± 0.25 mm (0.049 ± 0.010 inch)
    (C) Diameter of bore

  1. Machine the impeller bore (C) to the specification listed in Table 24.

  2. Machine the chamfer on the top face of the impeller to 25° and 1.25 ± 0.25 mm (0.049 ± 0.010 inch) deep.

  3. De-burr the sharp edges as needed after machining the bore.

  4. The surface finish of the impeller bore should be inspected. The finish should measure 0.8 microns to be acceptable.

  5. After machining the impeller bore, it must be balanced. Refer to the section "Impeller Balancing" within this document.

If the impeller bore measures less than the minimum size listed in Column (B) of Table 24, then the impeller can still be salvaged by knurling the inner diameter of the bore. If the impeller has signs of being knurled before, then the impeller cannot be salvaged and must be replaced. Knurling the impeller bore will raise the metal and make the bore diameter smaller. The knurling process can be completed by following:

  1. Refer to Column (C) of Table 24 to find the minimum bore diameter. Not all impellers can be knurled, those that can be knurled will have a dimension in Column (C) of Table 24. Machine the inside diameter of the impeller bore oversize by the dimension listed in Column (C). If the impeller bore measures greater than the oversize dimension listed in Column (C) before machining, then the impeller cannot be salvaged.


    Illustration 90g03464738
    Example of Caterpillar Inc CNC knurling tooling.

  2. Using appropriate knurling tooling, apply a cross hatch knurl such that the inner diameter of the impeller bore is . The exact angle of hatch is not as critical as it is to knurl the entire bore depth. Use a hatch angle between 30° and 60°, it is important to use a hatch at an angle less than 90°. Knurling the entire depth of the bore is important to ensure equal raising of material to provide adequate friction when installing the impeller onto the shaft.

Impeller Balancing



Illustration 91g03464458
One example of a balancing machine setup.

If the impeller bore has been machined or knurled, then the impeller must then be rebalanced. The impeller can be balanced either statically or dynamically. The impeller must be balanced to within 0.35 grams-meter. Use a drill and drill bit to remove material as the impeller is balanced. If the impeller is out of balance, it can be balanced using the following criteria.



Illustration 92g06281560
Critical balancing dimensions
(A) Radius to drill balancing holes.
(B) Minimum spacing between balancing holes.
(C) Balancing hole.


Illustration 93g06281563
Critical balancing dimensions
(A) Radius to drill balancing holes.
(B) Minimum spacing between balancing holes.
(C) Balancing hole.


Illustration 94g06281563
Critical balancing dimensions
(A) Radius to drill balancing holes.
(C) Balancing hole.

There are various styles of impellers, but they are all balanced in a similar fashion. When balancing the impeller, the relief holes must be centered on the radius and spacing listed in Table 25. Refer to Illustrations 92 ,93, and 94.

Table 25
Water Pump Impeller Balancing Specifications for 3500 Engines 
Impeller Part Number  Balance Hole Radius  Max. Bit Size  Max. Bit Depth  Min. Spacing 
212-8181
212-8183 
45.0 mm
(1.77 inch) 
7.0 mm
(0.276 inch) 
3.81 mm
(0.15 inch) 
1.5 mm
(0.059 inch) 
212-8184
212-8186
212-8187 
94.80 ± 0.75 mm
(3.73 ± 0.030 inch) 
13.0 mm
(0.50 inch) 
3.0 mm
(0.12 inch) 
3 mm
(0.12 inch) 
235-4541  81.25 ± 0.75 mm
(3.200 ± 0.030 inch) 
9.5 mm
(0.374 inch) 
8.5 mm
(0.335 inch) 
1.5 mm
(0.059 inch) 
268-1846
390-6235 
75.25 ± 0.75 mm
(2.963 ± 0.030 inch) 
9.5 mm
(0.374 inch) 
8.5 mm
(0.335 inch) 
1.5 mm
(0.059 inch) 
313-2760  67.75 ± 0.75 mm
(2.667 ± 0.030 inch) 
9.5 mm
(0.374 inch) 
8.5 mm
(0.335 inch) 
1.5 mm
(0.059 inch) 

Water Pump Modifications for 3500 Engines

This section highlights the major modifications to the water pump. The water pumps have been updated over time to provide a more robust pump. At the time of rebuild an older water pump can be updated to reflect the current production water pump. The following chart identifies the water pump groups that are direct replacements for the former water pump groups and which modifications are necessary.

Table 26
New and Corresponding Former Water Pump Groups for 3500 Engines 
Current Water Pump  Previous Water Pumps  Housing Assemblies  Housing Number 
212-8167(1)  156-9817
(2)(3)(4) 
156-9849  156-9823 
424-3625(1)  291-4311(3)(4)(5)  291-4309  291-4308 
424-3628(1)  291-4312(3)(4)(5)  291-4309  291-4308 
424-3629(1)  291-4313(4)(5)
317-5901(4)(5) 
291-4309  291-4308 
416-0606(1)  212-8172(4)  2W-7777  2W-7639 
416-0607(1)  212-8173(4)
166-4379(3)(4)
122-0502(3)(4) 
7N-4756  8N-1005 
416-0608(1)  212-8175(4)
166-4380(3)(4)
122-0503(3)(4) 
2W-7777  2W-7639 
416-0609(1)  212-8176(4)
2W-9726(4)(5)
166-4377(3)(4)
122-0501(3)(4) 
7N-4756  8N-1005 
416-0610(1)  212-8177(4)
2W-9729(4)
166-4378(3)(4)
122-0500(3)(4) 
7N-4756  8N-1005 
416-0611(1)  250-6721(4)  250-6723  250-6725 
416-0612(1)  312-0964(4)  250-6723  250-6725 
416-0613(1)  313-2650(4)
212-8174(4)
166-4382(3)(4)
137-8242(3)(4) 
137-8241  137-8217
313-2651 
416-0614(1)  350-8955(4)  N/A  N/A 
235-4536(1)  221-5353(4)  206-4279  206-4279 
349-6213(1)  221-5352(4)
235-4535(4)
258-8725(4) 
206-4278  206-4278 
315-5137
(2)(3)(4)(5) 
8N-8465
(2)(3)(4)(5) 
8N-8464  8N-8454 
New Ring Assembly  New Seal Group  Former Seal Group 
166-4374  416-0603  124-5245
166-4376
416-0603 
(1) Requires no modification.
(2) Requires seal retaining pin modification.
(3) Requires shaft upgrade.
(4) Requires seal group replacement.
(5) Requires thrust washer replacement.

Ring Assembly Modification

To modify the water pump housing to accept the new ring assembly, a hole must be drilled in the housing. This new hole will accept the pin of the ring assembly. The pin keeps the ring assembly positioned with the opening in the ring toward the bottom of the installed water pump. This opening allows any fluid that leaks past the water pump seals to get to the water pump weep port.



Illustration 95g03355823
Typical ring and pin assembly

The Ring Assembly is used on some water pumps. Some older style 8N-1005 Pump Housings did not originally have a ring assembly and spring pin. Those pump housings can be identified by the lack of a spring pin hole opposite of the weeping hole. Pump housings without the spring pin hole must be modified by drilling a 2.5 ± 0.05 mm (0.09843 ± 0.00197 inch) diameter spring pin hole through the water pump housing as shown in Illustration 6. To drill this hole properly, the following drill fixture may be fabricated to align the drill hole accurately. Refer to Illustration 96 for dimensions.



Illustration 96g06281533

Table 27
Fixture Dimensions for 3500 Engines 
Callout  Dimension 
5/16 - 18 
12.7 mm (0.5 inch)
Three Places 
20.6 mm (0.811 inch) 
12.7 mm (0.5 inch) 
17.5 mm (0.689 inch) 
37.0 mm (1.45 inch) 
55.6 mm (2.189 inch) 
33.80 mm (1.330 inch) 
50.80 mm (2 inch)
Radius 
1.52 mm (0.06 inch) x 45 Degrees 
15.875 mm (0.625 inch) 

The following illustration shows the location of the new hole in the housing assembly if you choose not to use the fixture.



Illustration 97g06281535
The hole needs to be 2.5 ± 0.05 mm (0.09843 ± 0.00197 inch) located on a radius of 17.5 ± 0.25 mm (0.689 ± 0.001 inch) (L).


Illustration 98g06281539
(M) Drilling fixture positioned onto the water pump housing
(P) Hole in housing that was drilled

Table 28
Tooling Required for 3500 Engines 
Callout  Qty  Description 
1A-LS-Lock Screw 
L-32-12 5/16 ID Liner Bushing 
SF-20-22 .0985 ID Drill Bushing
28.44800 mm (1.12 inch) Long 
5/16-18 x 1 SHCS 
HL-32-8 5/16 ID Liner Bushing 

Shaft Replacement

The tapered shaft is not a serviceable part. It must be replaced with a current straight shaft. Refer to the Parts Manual for the correct part numbers. The impeller that matches the tapered shaft can be modified to fit a straight shaft. Refer to the section "Impeller Salvage for 3500 Engines" found within this document.



Illustration 99g06281541
Seal angle for a 212-8179 Shaft.


Illustration 100g06281543
Seal angle for a 430-9695 Shaft.

Some water pump models have updated the angle near the oil seal and applied a radius. This new angle is to prevent damage to the oil seal during assembly. The 212-8179 Shaft has been replaced with the 430-9695 Shaft. Refer to Illustrations 99 and 100 in this document. If you have the 212-8179 Shaft, then it must be replaced with a 430-9695 Shaft at the time of rebuild.

Seal Group Replacement

The seal group must be replaced at every rebuild. The current 416-0603 Seal Group is a direct replacement for the 166-4375 Seal Group and the 124-5245 Seal Group found in former water pumps.

Disassembly

Refer to the appropriate Disassembly and Assembly manual for specific instructions.



Illustration 101g03465157
(1) Sleeve Bearing
(2) Thrust Washer


Illustration 102g03465184
Example of a hydraulic sleeve bearing puller.

Some pumps have a sleeve bearing (1) installed refer to Illustration 101. The updated thrust washer makes removal of the thrust washers impossible with the sleeve bearing still in the housing. During disassembly, the sleeve bearing must be removed first, then the thrust washers unbolted and then the shaft pressed out. The sleeve bearing (1) must be removed without damaging the pump housing.

Proper support of the water pump housing is critical for a successful disassembly. The use of a steel support plate in Illustration 103 is highly recommended. When pressing the shaft off the impeller and out of the housing the water pump housing must be fully supported to prevent flexing. If the housing flexes, then the housing can crack and destroy the housing. Refer to Illustrations 103 and 104 for an example of a supported water pump.



Illustration 103g06281545
Support plate used for removal of the shaft.
(A) 38 mm (1.496 inch)
(B) 133.4 mm (5.252 inch)
(C) 382 mm (15.039 inch)
(D) 305 mm (12.008 inch)


Illustration 104g03444021
Water pump successful disassembly.

Assembly

Refer to the appropriate Disassembly and Assembly Manual for a detailed procedure of the entire assembly process. This is a condensed version with the intent to highlight critical steps.

  1. Install plugs.

  2. Install the oil seal.

  3. Lubricate the shaft with clean water. Then insert the shaft and thrust washers. Tighten the thrust washer bolts.

  4. If a bearing sleeve was removed, install a new bearing sleeve.

  5. Flip the housing over. Apply P80 lubricant to the bottom half of the shaft. Using a press, install stationary portion of the water seal into the housing. Constant force is required when installing the seal to prevent damage to the seal face.

    Do not use a hammer and punch to install the water seal into the housing.

  6. Using the 438-8155 Adapter, install the 416-0603 Seal over the water pump shaft by hand with a rotating motion. Take care not to scratch the face of the seal as it will cause a leak.

  7. Place impeller onto shaft. Press the impeller onto shaft with a hydraulic press until impeller and shaft are flush.

Thermal Spray Procedures for Water Pump on C27 & C32 Engine



Illustration 105g03145381


Illustration 106g03145382

Table 29
C27 & C32 Water Pump 
Dimension A  Dimension B  Dimension C 
120.57 ± 0.03 mm (4.747 ± 0.001 inch)  69.075 ± 0.013 mm (2.7195 ± 0.0005 inch)  40.000 ± 0.025 mm (1.5748 ± 0.0010 inch) 
Dimension D  Dimension E  Dimension F 
184.28 ± 0.05 mm (7.255 ± 0.002 inch)  37.60 ± 0.10 mm (1.480 ± 0.004 inch)  34.66 ± 0.25 mm (1.365 ± 0.010 inch) 
174.63 ± 0.05 mm (6.875 ± 0.002 inch)  37.60 ± 0.10 mm (1.480 ± 0.004 inch)  34.66 ± 0.25 mm (1.365 ± 0.010 inch) 


Illustration 107g03154117

Table 30
C27 & C32 Water Pump 
Dimension G  Dimension H  Dimension I 
6.86 ± 0.25 mm (0.270 ± 0.010 inch)  2.84 ± 0.13 mm (0.112 ± 0.005 inch)  4.11 ± 0.13 mm (0.162 ± 0.005 inch) 
Dimension J  Dimension K   
1.0 ± 0.5 mm (2.0 (0.04 ± 0.02 inch)  0.80 ± 0.20 mm (0.031 ± 0.008 inch)  N/A 

Part Description

Table 31
Base Metal  Grey Iron Casting 
Hardness  187-241 BHN 

Arc Spray Equipment and Procedure

Table 32
Maximum Surface Texture  0.8 µm (31.49606 µinch) 
Reason for Spraying  Wear, grooving, or corrosion 
Mating Part Contact Area & Material  Engine cover and o-ring 
Arc Spray Equipment Type  SmartArc by Oerlikon Metco,TAFA 8830 MHU, or TAFA 8835 MHU 
Wire  TAFA 30T Wire Top Coat, TAFA 75B Bond Coat 
Finish Thickness  As required 
Spray Angle  90° 
Substrate Pre-Heat Temperature  66° C (150° F) Do not direct arc on area to be sprayed 
Substrate Temperature During Spraying Not to Exceed  148° C (300° F) 
Auxiliary Cooling  Filtered shop air 
Rotation/Traverse Device  Lathe 
Rotation Speed  92.0 SMPM (300.00 SFPM) 
Surface Preparation Method  Undercut and Grit blast 
Equipment Required  Turn (Horizontal or Vertical) Lathe 
Recommended Cutting Tool  ISCAR DNMG 432TFIC507 
Blast Media Recommendation  Pressure Type Only (Aluminum Oxide Grit) 

Table 33
Arc Spray  Procedure  Check List 
Clean Part  Degrease in hot caustic solution   
Undercut  If desired   
Chamfer  If required - 0.8 mm (0.032 inch) x 45°   
Remove Oxide  Use emery cloth or glass bead blaster   
Clean Spray Area  Commercial degreaser   
Mask for Grit Blaster  Duct tape, metal shield, or rubber   
Grit Blast Equipment  Pressure type only   
Grit Type and Size  20 mesh aluminum oxide   
Blast Air Pressure  690 kPa (100.0 psi)   
Blast Nozzle to Work Distance  51 to 150 mm (2.0 to 6.0 inch)   
Remove Blast Mask  Remove mask material, make sure that surface is clean   
Mask for Metal Spray  Duct tape, metal shield, or rubber   
Metal Spray Equipment Type  Smart Arc by Oerlikon Metco  TAFA   
  Consumable (Bondcoat)  TAFA 75B  TAFA 75B   
  Clamp Pressure  275 kPa (40 psi)     
  Air Jets/Pressure  415 kPa (60 psi)  415 kPa (60 psi)   
  Arc Load Volts  30V  30V   
  Amps  125 Amps  150 Amps   
  Gun to Work Distance (Standoff)  128 mm (5.0 inch)  128 mm (5.0 inch)   
  Spray Rate/Bond Pass  0.038 mm (0.0015 inch)/pass  0.038 mm (0.0015 inch)/pass   
  Consumable (Topcoat)  TAFA 30T  TAFA 30T   
  Clamp Pressure  275 kPa (40 psi)     
  Air Jets/Pressure  415 kPa (60 psi)  415 kPa (60 psi)   
  Arc Load Volts  31V  31V   
  Amps  150 Amps  175 Amps   
  Gun to Work Distance (Standoff)  166 mm (6.5 inch)  166 mm (6.5 inch)   
  Spray Rate/Build Up  0.058 mm (0.0023 inch)/pass  0.058 mm (0.0023 inch)/pass   
  Rotation Speed of Part  92.0 SMPM (300.00 SFPM)   
  Traverse Rate of Gun  11.0 SMPM (40.00 SFPM)   
Gun Fixturing Method  Machine mount or hand held   
Finishing Equipment  Milling machine   
Part/Cutter Rotation Roughing  50.0 SMPM (150.00 SFPM)   
Part/Cutter Rotation Finishing  75.0 SMPM (250.00 SFPM)   
Coolant  Oil base synthetic - 40:1 ratio   
Traverse Speed  0.30 mm (0.012 inch)   
Depth of Rough Cut  0.51 mm (0.020 inch)   
Depth of Finish Cut  0.25 mm (0.010 inch)   

Flame Spray Equipment and Procedure

Table 34
Maximum Surface Texture  0.8 µm (31.49606 µinch) 
Reason for Spraying  Wear, grooving, or corrosion 
Mating Part Contact Area & Material  Engine cover and o-ring 
Metco Equipment Type  6P-II by Oerlikon Metco 
Metco Material  Metco 453 
Finish Thickness  As Required 
Finishing Allowance  0.51 to 0.64 mm (0.020 to 0.025 inch) per side 
Spray Angle  90° 
Substrate Pre-Heat Temperature  66° C (150° F) Do not direct flame on area to be sprayed 
Substrate Temperature During Spraying Not to Exceed  148° C (300° F) 
Auxiliary Cooling  If desired 
Rotation/Traverse Device  Lathe 
Rotation/Traverse Device  91.4 SMPM (300.00 SFPM) 
Surface Preparation Method  Undercut and Grit Blast 
Finishing Method  Machine 
Machining Equipment Type  Lathe or Horizontal Mill 
Recommended Cutter Grade  C-2, 883 Carboloy or equivalent 

Table 35
Flame Spray Process (6P)  Procedure  Check List 
Clean Part  Degrease in hot caustic solution   
Undercut  To "tru-up" surface   
Chamfer  If required - 0.8 mm (0.032 inch) x 45°   
Remove Oxide  Use fiber flap brush or Clean/strip disc   
Clean Spray Area  Metco clean solvent or equivalent   
Mask for Blast  Duct Tape   
Blast Equipment  Pressure type only   
Grit Type and Size  24 mesh Aluminum Oxide   
Blast Air pressure  690 kPa (100.0 psi)   
Blast Nozzle to Work Distance  51 to 150 mm (2.0 to 6.0 inch)   
Remove Blast Mask  Remove mask, make sure that surface is clean   
Mask for Spray  Metco Antibond or Blue Layout Dye   
Spray Equipment Type  6P-II Hand Held Thermo Spray System by Oerlikon Metco   
Auxiliary Cooling  If desired   
Nozzle  6P-C7A-K "K" Nozzle   
Air Capacity/Pressure  6P-3/Cooling Air 140 - 170 kPa (20.0 - 25.0 psi)   
Oxygen Pressure  210 kPa (30.0 psi)   
Oxygen Flow  1190 L/h (42.0 cfh)   
Fuel Gas Pressure  100 kPa (15.0 psi)   
Fuel Gas Flow  1415 L/h (50.0 cfh)   
Carrier Gas Pressure  380 kPa (55.0 psi)   
Carrier Gas Flow  1050 L/h (37.0 cfh)   
Spray Rate/Build Up  5.5 kg (12 lb) per hour or 90 gr (3.2 oz) per min   
Gun to Work Distance  230 mm (9.0 inch)   
Rotation Speed of Part  91.4 SMPM (300.00 SFPM)   
Traverse Rate of Gun  15.24 SMPM (50.000 SFPM)   
Gun Fixturing Method  Machine mount or hand held   
Top Coat/Thickness  0.10 to 0.15 mm (0.004 to 0.006 inch) per pass   
Finishing Equipment  Lathe or Horizontal Mill   
Part/Cutter Rotation  91.4 SMPM (300.00 SFPM)   
Traverse Speed  0.05 to 0.10 mm (0.002 to 0.004 inch) per revolution   
Depth of Rough Cut  0.38 to 0.51 mm (0.015 to 0.020 inch) per side   
Depth of Finish Cut  0.25 to 0.38 mm (0.010 to 0.015 inch) per side   
Additional Finish Method  Emery cloth for desired finish   

Thermal Spray Procedures for Water Pump Housing Bore on 3208 Engines



Illustration 108g03046939

Table 36
Part Number  Dimension A  Dimension B 
9N-3076  69.019 mm ±0.02 (2.71728 inch ±0.00079)  50.98 mm ±0.25 mm (2.00708 inch ±0.00984 in) 

Part Description

Table 37
Base Metal  Cast Iron 
Hardness  N/A 

Flame Spray Equipment and Procedure

Table 38
Maximum Surface Texture  3.2 µm (125.9843 µinch) 
Reason for Spraying  Wear 
Mating Part Contact Area & Material  Bearing - press fit 
Metco Equipment Type  6P-II 
Metco Material  452 or 453 
Metco Sealer  185 
Finished Thickness  As required 
Finishing Allowance  0.64 mm (0.025 inch) per side 
Spray Angle  81° to bore 
Substrate Pre-Heat Temperature  38° C (100° F) 
Substrate Temperature During Spraying Not to Exceed  148° C (300° F) 
Rotation/Traverse Device  Lathe or turntable 
Rotation/Traverse Speed  92 SMPM (300.00 SFPM) 
Surface Preparation Method  Grit blast 
Finishing Method  Machine 
Machining Equipment Type  Lathe 
Recommended Cutter Grade  C-2 carbide 0.79 mm (0.031 inch) radius 
Remarks   

Table 39
Flame Spray Process (6P-II)  Procedure  Check List 
Clean Part  Wash in non-oil base solvent   
Undercut  Not required   
Chamfer  All edges - 45° x 0.76 mm (0.030 inch)   
Remove Oxide  Emery paper or glass beading   
Mask for Blast  Metal mask 61.994 ± 0.020 x 2.5 mm (2.4407 ± 0.0008 x .1 inch) thick   
Blast Equipment  Pressure blast   
Grit Type and Size  G-25 angular steel   
Blast Air Pressure  620 kPa (90.0 psi)   
Blast Nozzle to Work Distance  51 mm (2.0 inch)   
Remove Blast Mask  Remove   
Mask for Spray  Use METCO Anti-Bond - Install snap ring in groove   
Spray Equipment Type  6P-II   
Nozzle  6P7C-K "K"   
Air Capacity/Pressure  6P-3/Cooling Air - 140 kPa (20.0 psi)   
Oxygen Pressure  210 kPa (30.0 psi)   
Oxygen Flow  1190 L/h (42.0 cfh)   
Fuel Gas Pressure  100 kPa (15.0 psi)   
Fuel Gas Flow  1415 L/h (50.0 cfh)   
Carrier Gas Pressure  380 kPa (55.0 psi)   
Carrier Gas Flow  1050 L/h (37.0 cfh)   
Spray Rate/Build Up  5.5 kg (12.00 lb) per hour 0.10 to 0.15 mm (0.004 to 0.006 inch)   
Gun to Work Distance  229 mm (9.0 inch)   
Rotation Speed of Part (RPM)  470   
Rotation Speed of Part  92 SMPM (300.00 SFPM)   
Traverse Rate of Gun  15 SMPM (50.00 SFPM)   
Gun Fixturing Method  Hand held or machine mount   
Bond Pass/Thickness  0.08 to 0.13 mm (0.003 to 0.005 inch)   
Top Coat/Thickness  As required   
Finishing Equipment  Lathe   
Part/Cutter Rotation  61 SMPM (200.00 SFPM)   
Traverse Speed  0.08 mm (0.003 inch) per revolution   
Depth of Rough Cut  0.25 - 0.51 mm (0.010 - .020 inch)   
Depth of Finish Cut  0.25 mm (0.010 inch)   

Note: Do not direct flame on area to be sprayed.

Thermal Spray Procedures for Water Pump Shaft on D348, D398, G398, and D399 Engines



Illustration 109g03050142

Table 40
Part Number  Diameter A (Bearing)  Diameter B (Seal) 
5N-4378  32.13 ± 0.05 mm (1.265 ± 0.002 inch)  25.45 ± 0.05 mm (1.002 ± 0.002 inch) 

Part Description

Table 41
Base Metal  Alloy Steel 
Hardness  RC 45 min 

Flame Spray Equipment and Procedure

Table 42
Surface Texture  Diameter A: 0.25 - 0.51 µm (9.84252 - 20.07874 µinch)
Diameter B: 0.51 - 2.54 µm (20.07874 - 100.000 µinch) 
Reason for Spraying  Wear 
Mating Part Contact Area & Material  Seal and bushings 
Metco Equipment Type  6PHII 
Metco Material  447 or 453 
Metco Sealer  185 
Finished Thickness  As required 
Finishing Allowance  0.51 mm (0.020 inch) 
Spray Angle  90° 
Substrate Pre-Heat Temperature  N/A 
Substrate Temperature During Spraying Not to Exceed  204° C (400° F) 
Auxiliary Cooling  A J Siphon 
Rotation/Traverse Device  Lathe 
Rotation/Traverse Speed  91.4 SMPM (300.00 SFPM) 
Surface Preparation Method  Grit Blast 
Finishing Method  Grind 
Grinding Equipment Type  Cylindrical grinder 
Recommended Wheel  Si Carbide 46J or 46K 
Machining Equipment Type  N/A 
Recommended Cutter Grade  N/A 
Other Equipment Type  Belt Polisher 
Media Recommendation  400 Grit Emery 
Remarks   

Table 43
Flame Spray Process (6P)  Procedure  Check List 
Clean Part  Steam clean or vapor degrease   
Undercut  N/A   
Chamfer  Sharp edges 45° x 0.79 mm (0.031 inch)   
Remove Oxide  N/A   
Clean Spray Area  N/A   
Mask for Blast  Use metal mask or duct tape   
Blast Equipment  Suction blast cabinet   
Grit Type and Size  METCOLITE C   
Blast Air Pressure  621 kPa (90.0 psi)   
Blast Nozzle to Work Distance  51 mm (2.0 inch)   
Remove Blast Mask  If metal used, leave on - if not, remove tape and paint   
Mask for Spray  With Anti-Bond   
Spray Equipment Type  6PII   
Auxiliary Cooling  A J Siphon   
Nozzle  6P7C-K "K" Nozzle   
Air Capacity/Pressure  6P-3 Cool side out - 170 kPa (25.0 psi)   
Extension  N/A   
Air Jets/Pressure  N/A   
Oxygen Pressure  210 kPa (30.0 psi)   
Oxygen Flow  1190 L/h (42.0 cfh)   
Fuel Gas Pressure  100 kPa (15.0 psi)   
Fuel Gas Flow  1415 L/h (50.0 cfh)   
Carrier Gas Pressure  380 kPa (55.0 psi)   
Carrier Gas Flow  1050 L/h (37.0 cfh)   
Spray Rate/Bond Pass  N/A   
Spray Rate/Build Up  5.5 kg (12.00 lb) per hour 0.10 - 0.15 mm (0.004 - 0.006 inch) per pass   
Gun to Work Distance  229 mm (9.0 inch)   
Rotation Speed of Part  91.4 SMPM (300.00 SFPM)   
Traverse Rate of Gun  15 SMPM (50.00 SFPM)   
Gun Fixturing Method  Hand held   
Bond Pass/Thickness  N/A   
Top Coat/Thickness  As required   
Finishing Equipment  Cylindrical grinder   
Depth of Rough Cut  Plunge grind to 0.13 mm (0.005 inch) oversize   
Depth of Finish Cut  Dress wheel and traverse to finish size   
Additional Finish Method  Polish with 400 grit emery, if necessary   

Thermal Spray Procedures for D9H Water Pump Housing



Illustration 110g03080261

Table 44
4M-2281 Housing ( 6N-6424 Water Pump Gp) Dimensions 
108.2 ± 0.05 mm (4.26 ± 0.020 inch) 
169.012 ± 0.025 mm (6.654 ± 0.001inch) 
96.56 ± 0.064 mm (3.8015 ± 0.0025 inch) 
139.75 ± 0.25 mm (5.562 ± 0.010 inch) 

Part Description

Table 45
Base Metal  Gray Iron 
Hardness 

Flame Spray Equipment and Procedure

Table 46
Maximum Surface Finish  140 Microinches 
Reason for Spraying  Erosion 
Mating Part Contact Area & Material  Impeller, Cover 
Metco Equipment Type  Metco 6P-II 
Metco Material  453 
Finished Thickness  As Required 0.25 to 0.38 mm (0.010 to 0.015 inch) 
Finishing Allowance  0.51 to 0.64 mm (0.020 to 0.025 inch) 
Spray Angle  90° 
Substrate Pre-Heat Temperature  66° C (150° F) Do not direct flame on area to be sprayed 
Substrate Temperature During Spraying Not to Exceed  148° C (300° F) 
Auxiliary Cooling  AJ, If desired 
Rotation/Traverse Device  Lathe or Turntable 
Rotation/Traverse Speed  91.4 SMPM (300.00 SFPM) 
Surface Preparation Method  Hand grind erosion before grit blasting. Grinding removes contamination. Undercut (machine) wear surface area. 
Finishing Method  Machine 
Machine Equipment Type  Lathe 
Recommended Cutter Grade  C2, 883 Carboloy, or equivalent 

Table 47
Flame Spray Process (6P)  Procedure  Check List 
Clean Part  Degrease in hot caustic solution   
Undercut  0.51 mm (0.020 inch) to "tru-up" surface   
Chamfer  45°   
Remove Oxide  Use fiber flap brush, Clean/strip disc   
Mask for Blast  Use metal, rubber, or duct tape   
Blast Equipment  Pressure type only   
Grit Type and Size  25/40 steel angular grit   
Blast Air Pressure  620 kPa (90.0 psi)   
Blast Nozzle to Work Distance  50 mm (2.0 inch)   
Mask for Spray  Antibond or sheet metal layout dye   
Spray Equipment Type  6P-II Thermo Spray System   
Auxiliary Cooling  Metco AJ Siphon Air Jet   
Nozzle  6P-C7A-K "K" Nozzle   
Air Capacity/Pressure  6P-3/Pinch Air 140 - 170 kPa (20.0 - 25.0 psi)   
Oxygen Pressure  210 kPa (30.0 psi)   
Oxygen Flow  1190 L/h (42.0 cfh)   
Fuel Gas Pressure  100 kPa (15.0 psi)   
Fuel Gas Flow  1415 L/h (50.0 cfh)   
Carrier Gas Pressure  380 kPa (55.0 psi)   
Carrier Gas Flow  1050 L/h (37.0 cfh)   
Spray Rate/Build Up  5.5 kg (12 lb) per hour or 90 gm (3.2 oz) per min   
Gun to Work Distance  230 mm (9.0 inch)   
Rotation Speed of Part (RPM)  165 RPM   
Rotation Speed of Part  91.4 SMPM (300.00 SFPM)   
Traverse Rate of Gun  15.24 SMPM (50.000 SFPM)   
Gun Fixturing Method  Hand Held   
Top Coat/Thickness  0.10 to 0.15 mm (0.004 to 0.006 inch) per pass   
Finishing Equipment  Lathe   
Part/Cutter Rotation  91.4 SMPM (300.00 SFPM)   
Traverse Speed  0.05 to 0.10 mm (0.002 to 0.004 inch) per revolution   
Depth of Rough Cut  0.38 to 0.51 mm (0.015 to 0.020 inch) per side   
Depth of Finish Cut  0.25 to 0.38 mm (0.010 to 0.015 inch) per side   

Storage Procedures

Proper protection of the water pump from corrosion is important. Corrosion will start in as little as one hour after the water pump has been cleaned.

When the water pump will not be inspected for one hour or less the water pump should be coated with a rust or corrosion inhibitor or coated with clean engine oil. The water pump should be individually wrapped to prevent contamination, and should be stored in a protected area to avoid damage. See Illustration 111.

When the water pump will not be inspected in two days or more the water pump should be coated with a rust or corrosion inhibitor or coated with clean engine oil and should be placed in a container which is clean and structurally solid. The container should be covered or wrapped in plastic to prevent damage and contamination to the water pump. See Illustration 112.

Refer to SEHS9031Special Instruction, "Storage Procedure for Caterpillar Products" for more information.



Illustration 111g06278538
Example of protection for a component that is stored for a shorter term


Illustration 112g06278539
Example of protection for a component that is stored for a longer period

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