Reuse and Salvage for 3044, 3046, 3064, 3066, 3400, 3500, and C175 Engine Oil Pumps {1304, 1315} Caterpillar

Caterpillar Products

All 3000 Engines

All 3400 Engines

All 3500 Engines

All C175 Engines

All G3500 Engines

Introduction

Table 1

Revision	Summary of Changes in SEBF8170
27	Added new serial number prefixes for New Product Introduction (NPI) and 12 part numbers.
25–26	Combined information from SEBF2127, SEBF2144, SEBF2156, SEBF2161, SEBF9044, SEBF9198, added 4 part numbers and repaired 26 pixelated illustrations.
24	Added verbiage for C175 oil pump shafts.

© 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 does 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 1	g02139237

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.

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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 2	g00008666

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 should be used for inspecting and measuring the components of a used engine oil pump, reconditioned engine oil pump, and front housings. This inspection and the measurement will determine if an engine oil pump can be used again. Often, the installation of a new engine oil pump is not necessary during an engine rebuild. The installation of a used oil pump or reconditioned oil pump can decrease costs of the engine rebuild. An engine oil pump that meets these guidelines for inspection and specifications can be expected to give normal performance in the same application until the next overhaul.

If this guideline indicates a part that cannot be used again, then never reuse the part. Individual components must be checked for recommended specifications. Before installing a used part or reconditioned part or a pump, correct any conditions that may have caused the original failure or wear.

Service Letters and Technical Information Bulletins

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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	"Gear Tooth Inspection"
	https://channel1.mediaspace.kaltura.com/media/Gear+Tooth+Inspection/1_5ujdi5zp
	"Why Reuse and Salvage Parts"
	https://channel1.mediaspace.kaltura.com/media/Why+Reuse+and+Salvage+Parts/0_ae9rhu2z
SEBF2161	Reuse and Salvage Guidelines, "Thermal Spray Procedures for 3500 Engine - Oil Pump"
SEBF8187	Reuse and Salvage Guidelines, "Standardized Parts Marking Procedures".
SEBF9066	Applied Failure Analysis, "Guideline for Examining Failed Parts"
SEBF9068	Reuse and Salvage Guidelines, "Inspection Procedures for 3064 and 3066 MHI Engines for Caterpillar Built Machines"
SEBF9240	Reuse And Salvage Guidelines, "Fundamentals of Flame Spray for Reconditioning Components"
SEBF9244	Reuse and Salvage Guidelines, "Reuse and Salvage for Gear Train and Gear Shafts on Engines"
SEHS9031	Special Instruction, "Storage Procedure for Caterpillar Products"

Tooling and Equipment

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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

Required Tooling and Equipment
Part Number	Description
1P-0510	Driver
1P-3537	Dial Bore Gauge Kit
1S-0258	Soft Face Hammer
6V-2010	Polishing Stone
6V-2012	Depth Micrometer
9A-1593	Surface Texture Comparison Gauge
223-1694	Dead Blow Hammer
263-9070	Steel File
303-9339	Lint Free Shop Towels
383-8887	Dual Scale Feeler Gauge Set
386-3364	Straight Edge Ruler
441-0714	Spring Tester
448-3698	Profilometer
473-8688 or 473-8689	Internal Micrometer Set 2-12 inch
	Internal Micrometer Set 50-300 mm
473-8690	Outside Electronic Micrometer Set 0-4 inch
473-8691	Outside Electronic Micrometer Set 2-6 inch

Replacement Parts

Consult the applicable Parts Identification manual for your engine.

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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.

Preparation Recommendations

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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.

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Personal injury can result from air pressure. Personal injury can result without following proper procedure. When using pressure air, wear a protective face shield and protective clothing. Maximum air pressure at the nozzle must be less than 205 kPa (30 psi) for cleaning purposes.

• Before you inspect a part, clean the part thoroughly to ensure that all components are free from rust, oil, burrs, and debris prior to inspection. A surface irregularity can hide the indication of an unacceptable defect.

• Use a proper lifting device to provide safety to the operator. Also, use a proper lifting device to prevent damage to the part when you lift the part.

• During cleaning, do not damage machined surfaces.

• Do not use pressurized air to dry internal components. Compressed air has moisture and contaminants that can cause premature failure of internal components.

• Put hydraulic oil on all machined surfaces to prevent rust or corrosion if inspection is not done immediately after cleaning. Carefully store the parts in a clean container.

• Inspect all flange mating surfaces for fretting. Ensure that flange mating surfaces are true and free from raised material resulting from rust, nicks, and dents.

• Use appropriate thread taps to chase all threaded holes.

Standardized Parts Marking Procedure

Reference: SEBF8187Reuse and Salvage Guidelines, "Standardized Parts Marking Procedures".

The code is a Cat standard and is used to record the history of a component. The code will identify the number of rebuilds and hours at the time of each rebuild. This information is important and should be considered for any decision to reuse a component.

Ensure that the mark is not covered by a mating part. Use a metal marking pen to mark the code onto the component.

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NOTICE
Do not use numbering stamp punches to mark internal components. The impact from striking the stamp will cause an abnormal stress riser. The added stress riser may cause premature part failure.

Illustration 3	g06124077
DO NOT use numbering stamp punches to mark internal components.

The procedure for marking components is a Cat standard. This code is helpful when the machine is sold into a different territory after the first rebuild. During an overhaul, the previous code of a part should never be removed.

Example 1

Illustration 4	g03856853
Typical Example

Illustration 4 shows code (1-15). The first number (1) indicates that the gear had been rebuilt once. The second number (15) indicates that there were 15,000 hours on the gear at the time of rebuild.

Example 2

Illustration 5	g03856857
Typical Example

Illustration 5 shows code (1-12) and code (2-10). Code (2-10) represents the information from the second rebuild. The first number (2) indicates that the gear had been rebuilt twice. The second number (10) indicates that 10,000 hours accumulated on the gear between the first and second rebuild.

Note: Add the first and second rebuild hours to obtain the total number of hours for the gear in Illustration 5. In this example, the gear has a total of 22,000 hours.

Measurement Requirements

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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.

3044, 3046, 3064, and 3066 Engines

Oil Pump Gears

After removing the gears from the oil pump, clean the components thoroughly. Inspect the gears for cracks, pitting, corrosion, the transfer of metal, or any other signs of abnormal wear.

If the gears will be stored after cleaning and inspection, coat the gears with a thin layer of engine oil. Store the gears in a clean, dry place. See "Storage Procedure" for additional information.

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NOTICE
Keep all parts clean from contaminants Contaminants may cause rapid wear and shorten component life

For more information regarding the wear patterns of gears, refer to Guidelines for Reusable Parts and Salvage Operations, SEBF9244, "Reuse and Salvage for Gear Train and Gear Shafts on Engines".

Front Housings and Covers

After removing the housing and the cover, clean the components thoroughly. Inspect the housing and the cover for cracks, pitting, erosion, or any signs of abnormal wear. Replace any component that is questionable.

Measure the bore diameters that are referenced in Table 4, Table 5, and Table 8. If the measurements are outside of the specifications, then the housing or the cover must be replaced.

If the housing and the cover will be stored after cleaning and inspection, coat the housing and the cover with a thin layer of engine oil. Store the housing and the cover in a clean, dry place. Reference "Storage Procedure" for additional information.

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NOTICE
Keep all parts clean from contaminants Contaminants may cause rapid wear and shorten component life

Table 4

Specifications for the Front Housing(1) 3044 and 3046 Engines
Area	Dimension
Diameter for the Bore for the Crankshaft Seal	95.03 to 95.08 mm (3.741 to 3.743 inch)
Bore Diameter for the Front Bearing Support for the Camshaft Gear	80.00 to 80.03 mm (3.150 to 3.151 inch)
Bore Diameter for the Support of the Hydraulic Pump Drive Gear(2)	67.988 to 68.018 mm (2.6767 to 2.6779 inch)

(1)	Reference Table 8 for specifications for the oil pump as the specifications pertain to the front housing.
(2)	This is applicable to engines that are equipped to drive hydraulic pumps.

Table 5

Specifications for Front Housings(1) 3064 and 3066 Engines
Area	Dimension
Bore Diameter for the Crankshaft Seal	95.03 to 95.08 mm (3.741 to 3.743 inch)
Bore Diameter for the Water Pump	104.00 to 104.20 mm (4.095 to 4.102 inch)

(1)	Reference Table 8 for specifications for oil pumps as the specifications pertain to the front housing.

The Measurement of Oil Pump Components

3044 and 3046 Engines

Illustration 6	g06305612
(9) O-ring (10) Inner rotor (11) Shaft (12) Outer rotor (13) Body

Disassemble the oil pump. Clean all the components. Inspect all the components for cracks, pitting, or other obvious signs of wear.

Illustration 7	g00987626
Clearance between the outer rotor and the body

Use a feeler gage to measure the clearance between the outer rotor and the body. If the clearance exceeds 0.500 mm (0.0197 inch), replace the pump assembly.

Illustration 8	g00987627
Clearance between the inner rotor and the outer rotor

Use a feeler gauge to measure the clearance between the inner rotor and the outer rotor. If the clearance exceeds 0.200 mm (0.0079 inch), replace the pump assembly.

Illustration 9	g00987628
Clearance between rotors and the body

Use a feeler gauge and a straight edge to measure the clearance between the rotors and the body. If the clearance exceeds 0.150 mm (0.0059 inch), replace the pump assembly.

Illustration 10	g06305618
Measuring diagram for the oil pump shaft and oil pump housing

Measure the diameter of the oil pump shaft and the diameter for the oil pump shaft in the oil pump body. Subtract the diameter for the oil pump shaft from the diameter of the oil pump housing. If the clearance exceeds 0.150 mm (0.0059 inch), replace the pump assembly.

Illustration 11	g06305621
Measuring diagram for the oil pump shaft and the bushing for the oil pump shaft

Measure the diameter of the oil pump shaft and the inside diameter of the bushing in the engine block for the oil pump shaft. If the clearance exceeds 0.200 mm (0.0079 inch), replace the bushing or the pump assembly. The diameter for the oil pump bushing in the engine block is 16.000 to 16.018 mm (0.6299 to 0.6306 inch).

Note: Use the proper tool to install the oil pump bushing. Install the oil pump bushing so that the bushing is flush with the front face of the engine block.

3064 and 3066 Engines

Illustration 12	g06305626
(1) Driven Gear Assembly (2) Drive Gear Assembly (3) Oil Pump Gear (4) Idler Gear Assembly (5) Spindle

Note: Items (2) and (3) are serviced as one unit. Do not remove oil pump gear (3) from drive gear assembly (2) until all the following inspections have been made.

Note: If either the driven gear assembly (1) or the drive gear assembly (2) must be replaced, then both of the gear assemblies must be replaced.

Illustration 13	g06305628
(6) Housing

Use a dial indicator or a depth micrometer to measure the distance between the end of the gears and the face of housing (6). Refer to Table 6 for the allowable distances. If the measurements are outside of the specifications, then the gear assemblies must be replaced.

Table 6

Sales Model	Above(1)	Below(2)
3064	0.020 mm (0.0008 inch)	0.150 mm (0.0059 inch)
3066	0.010 mm (0.0004 inch)	0.150 mm (0.0059 inch)

(1)	The end of the gear is above the housing.
(2)	The end of the gear is below the housing.

Illustration 14	g06305629

Use a feeler gauge to measure the clearance between the gears and the housing for both the 3064 and 3066 engines. The clearance must not exceed 0.100 mm (0.0039 inch). If the clearance exceeds the specifications, replace the gears.

Inspect the teeth of the gears for damage, cracks, or abnormal wear patterns. For more information regarding the wear patterns of gears, refer to Guidelines for Reusable Parts and Salvage Operations, SEBF9244, "Reuse and Salvage for Gear Train and Gear Shafts on Engines".

Illustration 15	g06305639
(3) Oil Pump Gear (4) Idler Gear Assembly

Use a dial indicator to measure the backlash between oil pump gear (3) and idler gear assembly (4). The distance that is read on the dial indicator must be between 0.100 to 0.350 mm (0.0039 to 0.0138 inch). If the distance exceeds the specifications, replace both of the gears. Refer to Table 7 for the overall diameter of the gear that is part of the shaft.

Inspect the teeth of the gears for damage, cracks, or abnormal wear patterns. For more information regarding the wear patterns of gears, refer to Guidelines for Reusable Parts and Salvage Operations, SEBF9244, "Reuse and Salvage for Gear Train and Gear Shafts on Engines".

Illustration 16	g06305641
(6) Housing (7) Cover

Measure the bores on housing (6) and cover (7). Measure the diameter of the shaft at each end for the drive gear and measure the diameter of the shaft at each end for the driven gear. The clearance between the shaft and the housing and the clearance between the shaft and the cover should not exceed 0.150 mm (0.0059 inch). Refer to Table 7 and Table 8 to determine the part or parts that are worn. Replace the part or replace the parts that are worn.

Table 7

Specifications for the Oil Pump Drive Gear and Driven Gear 3064 and 3066 Engines
Part	Dimension
Shaft Diameter	19.947 to 19.960 mm (0.7853 to 0.7858 inch)
Overall Diameter of the Gear	51.815 to 51.955 mm (2.0400 to 2.0455 inch)

Table 8

Specifications for the Front Housing and Cover for the Oil Pump 3064 and 3066 Engines
Part	Dimension
Housing Inside Diameter(1)	20.00 to 20.21 mm (0.787 to 0.796 inch)
Cover Inside Diameter
Diameter of the Bore for the Spindle	20.00 mm (0.787 inch)
Clearance Between The Housing And The Shaft	0.04 to 0.07 mm (0.002 to 0.003 inch) Service Limit 0.150 mm (0.0059 inch)

(1)	This diameter is for the drive and driven gears.

Illustration 17	g06305646
(5) Spindle (8) Idler Gear Bushing

Measure the inside diameter of idler gear bushing (8). If the measurement does not fall within 24.939 to 24.960 mm (0.9818 to 0.9827 inch), replace the gear assembly.

Measure the diameter of spindle (5) in the area of the rotation of the gear. If the measurement does not fall within 25.000 to 25.021 mm (0.9843 to 0.9851 inch), replace the spindle. The diameter for the spindle that presses into the housing is 20.05 to 20.07 mm (0.789 to 0.790 inch).

Idler Gear Shaft and Bore for the Idler Gear Shaft

Clean the idler gear shaft thoroughly after removing the idler gear shaft from the engine block. Inspect the idler gear shaft and the bore for the idler gear shaft in the engine block for damage, pitting, erosion, the transfer of metal or any signs of abnormal wear. Replace the idler gear shaft that is questionable.

Illustration 18	g06305649
Reference for the idler gear shaft specifications

Measure the idler gear shaft and the bore for the idler gear shaft in the engine block. Replace the idler shaft if the idler shaft does not meet the specifications. Refer to Table 9, Table 10, Table 11, and Table 12 for specifications.

Table 9

Specifications for the Idler Gear Shaft 3044 and 3046 Engines
Dimension	Reference To The Figure(1)
39.975 to 39.991 mm (1.5738 to 1.5744 inch)	14
30.00 to 30.10 mm (1.181 to 1.185 inch)	15
51.50 to 52.10 mm (2.028 to 2.051 inch)	16
35.060 to 35.076 mm (1.3803 to 1.3809 inch)	17

(1)	Reference figure 18 for the areas for measuring.

Table 10

Specifications for the Bore for the Idler Gear Shaft 3044 and 3046 Engines
Dimension	Reference To The Figure
35.006 to 35.030 mm (1.3782 to 1.3791 inch)	N/A

Table 11

Specifications for the Idler Gear Shaft 3064 and 3066 Engines
Dimension	Reference To The Figure(1)
39.955 to 39.971 mm (1.5730 to 1.5737 inch)	14
26.00 to 26.10 mm (1.024 to 1.028 inch)	15
47.50 to 48.10 mm (1.870 to 1.893 inch)	16
35.076 to 35.080 mm (1.3809 to 1.3811 inch)	17

(1)	Reference figure 18 for the areas for measuring.

Table 12

Specifications for the Bore for the Idler Gear Shaft 3064 and 3066 Engines
Dimension	Reference To The Figure
34.991 to 34.955 mm (1.3780 to 1.3762 inch)	N/A

Nomenclature

3400 Engine Oil Pump

Illustration 19	g06305653
(1) Pump cover assembly (2) Sleeve Bearing (3) Input Drive Shaft (4) Pump body assembly (5) Cover assembly of the pump body (6) Hollow dowel (7) Cover (pressure relief valve) (8) Drive shaft assembly (9) Spring (pressure relief valve) (10) Spool (pressure relief valve) (11) Sleeve bearing

3500 Engine Oil Pump

Illustration 20	g01950004
Typical engine oil pump group for 3500 Family of Engines (1) Pump cover assembly, (2) Sleeve bearing, (3) Idler shaft assembly, (4) Pump body assembly, (5) Cover assembly of the pump body, (6) Hollow dowel, (7) Cover (pressure relief valve), (8) Drive shaft assembly, (9) Spring (pressure relief valve), (10) Spool (pressure relief valve), and (11) Sleeve bearing

C175 Engine Oil Pump

Illustration 21	g06305691
(1) Body Assembly (2) Sleeve Bearing (3) Input Drive Shaft (4) Cover Assembly (5) Sleeve Bearing (6) Shaft Assembly

Visual Inspection

Spool for Pressure Relief Valve

The relief valve spool for oil pressure and the spring should be visually inspected. The oil pump body and pump cover assembly should also be inspected. This inspection will determine if these components meet the specifications for reusability.

Check for an excessive wear groove on the outer surface of spool (10) as the spool appears to be cocked by the spring (9). Spools that have been polished for the removal of a wear groove should maintain a minimum diameter for reusability. Refer to Table 15 for the minimum diameter for reusability (J). If the spool is not within the minimum diameter for reusability, then the spool should be replaced.

Check for a wear groove on the inside of the spool. Particularly check the area that comes into contact with the spring. A wear groove could be deep enough to catch a coil of the spring which could affect the spring rate of the spring. If there is a wear groove on the valve spool, then the valve spool is not reusable and the valve spool should be replaced.

Spring for Pressure Relief Valve

Illustration 22	g03680564
Use the 441-0714 Spring Tester to test the springs.

Check for wear or nicks on spring (9). If the spring is slightly worn, then the spring might meet the specified spring force values in Table 15. In that case, the spring is reusable. Check the spring force with a valve spring tester, and use Table 15 for correct values for spring force and spring length.

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NOTICE
Deep nicks on the spring could lead to breakage and result in pump damage. If there are deep nicks, do not reuse the valve spring. Replace it immediately.

Pump Body Assembly and Pump Cover Assembly

Check for wear on the side of the oil pressure relief hole. Usually, this spot of wear can be removed by polishing. Check for wear in the bore of the oil pump. Specifically, check the contact area of the body and gears. This wear could possibly be cleaned up without exceeding the maximum depth for reusability, which is specified in table 15. If the bore of the oil pump does not exceed the maximum depth for reusability, then the oil pump body can be reused.

Illustration 23	g06305699
Cavitation erosion on the body assembly

Check for cavitation erosion in the body assembly and the pump cover assembly under the location of the center gear. Sometimes, numerous spots of cavitation may be present. However, both the pump body and the cover are reusable if the eroded areas do not exceed a maximum of 12.70 mm (0.500 inch) in diameter and 3.175 mm (0.1250 inch) in depth.

Note: If the cavitation on the body or the cover exceeds the maximum limit, use the salvage procedure of flame spray. For the salvage procedure of flame spray, refer to Reuse And Salvage Guidelines, SEBF9240, "Fundamentals of Flame Spray for Reconditioning Components".

Oil Pump Gears

It is important for the gears to be cleaned prior to inspection. After removing the gears from the oil pump, clean the gears to make sure that the gears are free of dirt, water, and oil. After inspection, the gears should be coated in a thin layer of engine oil before storage. Store the gears in a clean, dry place.

After cleaning the gears, carefully inspect each gear for cracks, pitting, spalling, scoring, or any other damage to the surface. Refer to the "Damage to the Surface" section for an explanation of these terms. The inspection of the gears should be inspected by using a magnifying glass and a strong light source. It may be difficult to tell the difference between small scratches and cracks. Cracks can be highlighted by using a dry magnetic particle or a test with a dye penetrant. A gear must be free of cracks to be reusable.

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NOTICE
It is important that you carefully inspect every tooth of each gear. If you are not sure whether a gear can be reused, the gear should be replaced. Serious problems can result from reusing a gear when it actually falls into the "Do Not Use Again" criteria. These problems can include oil pump failure and major damage to the engine.

Damage to the Surface

Several types of damage to the surface can occur to the oil pump gears. For example, there can be pitting, spalling, and scoring on the gear teeth. Pitting is the result of high contact stresses and the rolling or sliding action of mating teeth. Pitting of a gear tooth can result in failure from fatigue on a surface or below the surface.

There are two types of pitting: There is initial pitting and there is destructive pitting. Initial pitting occurs during the break-in period and initial pitting is not considered to be harmful. Initial pitting does not progress to the stage of destructive pitting. The initial pitting will stop once the gear has been sufficiently broken in. Gears that show signs of initial pitting can be reused in the pump.

Destructive pitting normally occurs after a long period of operation that is combined with high contact stresses. High stress concentrations on the face of the tooth of the gear produce destructive pitting. Then, complete breakdown of the gear tooth can occur quickly. Gears that are showing signs of destructive pitting should not be reused.

Spalling is failure by fatigue from below the surface. Spalling can be the final stages of destructive pitting, or spalling can occur without pitting. Spalling occurs when small cracks from fatigue build-up under the surface of the tooth. An area can be weakened enough to flake off pieces of the face of the tooth. Once spalling begins, spalling will quickly progress to the complete fracture of the tooth. Pump gears that are showing signs of spalling should not be reused.

Scoring results from metal-to-metal contact between mating gears. Scoring looks like vertical scratches on the tip of the tooth. Scoring may also appear in the area of the root of the gear. The sliding action of the teeth of the gears is greatest at the area of the root of the gear.

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NOTICE
Gears with any crack (regardless of size), any destructive pitting, and/or spalling can cause oil pump and engine damage and are not acceptable in engine oil pumps. If you see any evidence of the above damage to the gear, do not use again.

Reconditioning

Some gears with minor damage to the surface can be used again after the damaged area has been corrected. Only use a stone for sharpening and oil to correct damage to the surface. Never use a grinder or a power tool for polishing.

If you recondition a gear, remove only raised metal from the tooth surface. Never try to remove pitting or any other damage below surface level.

Visual Inspection of Oil Pump Bearings

Illustration 24 shows normal or acceptable wear on an oil pump bearing. The bearing in Illustration 24 should be replaced as part of a rebuild, but has no concern as a wear pattern of potential failure.

Illustration 24	g03413637
This bearing shows normal wear. Replace as part of a rebuild.

Oversized Bearings are Available for Reconditioning of Engine Oil Pumps and Scavenge Oil Pumps

Caterpillar Reman is using oversized bearings to salvage the housings and covers of engine oil pumps and scavenge oil pumps for 3500 Engines.

The remanufactured engine oil pumps and the scavenge oil pumps that may use the new oversized 227-4147 Sleeve Bearing are listed in the Table 13below.

Table 13

Remanufactured Engine Oil Pumps and Scavenge Oil Pumps that Use the 227-4147 Sleeve Bearing
Part Number	Description
0R-2561	Engine Oil Pump
0R-3230	Engine Oil Pump
0R-4345	Engine Oil Pump
0R-3233	Gear Pump
0R-3860	Gear Pump
0R-9250	Gear Pump

The new 227-4147 Sleeve Bearing is being used in remanufacturing when the original 1W-6005 Sleeve Bearing cannot fit properly. If an enlarged bore is found during remanufacturing, the bore is machined to accommodate the outer diameter of an oversized bearing. The outer diameter of the oversized bearing is 35.189 ± 0.015 mm (1.3854 ± 0.0006 inch). The new oversized bearing has the same inner diameter as the original bearing. The bores of a remanufactured pump could have a combination of the new 227-4147 Sleeve Bearing and of the original 1W-6005 Sleeve Bearing. Refer to Table 15 for standard bore sizes.

Specifications for Measurement

3400 Engine Oil Pump

Illustration 25	g06305700

Table 14

Specifications for Reusability for 3400 Engine Oil Pump Components.(1)
Item	Description	Part Number 4N-0735 4N-8735		Part Number 161-4110 161-4112 161-4113 198-1508		Part Number 116-1980 520-2923 520-2924
		Minimum	Maximum	Minimum	Maximum	Minimum	Maximum
(A)	Length of gears for the oil pump.	57.133 mm (2.24933 inch)	57.183 mm (2.25129 inch)	79.350 mm (3.12401 inch)	79.400 mm (3.12598 inch)	139.075 mm (5.47 inch)	140.025 mm (5.51 inch)
	Depth of bores for gears for the oil pump.	57.265 mm (2.25452 inch)	57.305 mm (2.25610 inch)	79.482 mm (3.12921 inch)	79.522 mm (3.13078 inch)	140.107 mm (5.516 inch)	140.147 mm (5.517 inch)
(B)	Diameter of gear shafts	22.212 mm (0.875 inch)	22.222 mm (0.875 inch)	22.212 mm (0.875 inch)	22.222 mm (0.875 inch)	22.212 mm (0.875 inch)	22.222 mm (0.875 inch)
	Bore in bearings for the gear shafts after assembly	22.312 mm (0.878 inch)	22.322 mm (0.878 inch)	22.312 mm (0.878 inch)	22.322 mm (0.878 inch)	22.312 mm (0.878 inch)	22.322 mm (0.878 inch)
	Bore in oil pump body for bearings	26.957 mm (1.06 inch)	26.973 mm (1.06 inch)	26.957 mm (1.06 inch)	26.973 mm (1.06 inch)	26.957 mm (1.06 inch)	26.973 mm (1.06 inch)
(D)	Distance from the end of the idler shaft of the pump to the gear face.	36.25 mm (1.42 inch)	36.75 mm (1.44 inch)	36.25 mm (1.42 inch)	36.75 mm (1.44 inch)	36.25 mm (1.42 inch)	36.75 mm (1.44 inch)
(E)	Distance from the end of the pump drive shaft to the gear face.	52.75 mm (2.07 inch)	53.25 mm (2.09 inch)	52.75 mm (2.07 inch)	53.25 mm (2.09 inch)	52.75 mm (2.07 inch)	53.25 mm (2.09 inch)
(F)	Depth of installation for bearings in cover	1.0 mm (0.04 inch)	2.0 mm (0.08 inch)	1.0 mm (0.04 inch)	2.0 mm (0.08 inch)	1.0 mm (0.04 inch)	2.0 mm (0.08 inch)
(G)	Depth of installation of bearings in body	0.05 mm (0.002 inch)	0.55 mm (0.022 inch)	0.05 mm (0.002 inch)	0.55 mm (0.022 inch)	0.05 mm (0.002 inch)	0.55 mm (0.022 inch)

(1)	Oil pump shafts are not reusable.

3500 Engine Oil Pump

Illustration 26	g06305708

Illustration 27	g06305710

Illustration 28	g06305711
Diameter of installed bushing

Illustration 29	g06305712
Diameter of bore for bushing

Illustration 30	g06305713
Protrusion of the dowel

Illustration 31	g06305714
Depth of installed bushing in cover

Illustration 32	g06305715
Depth of installed bushing in housing

Table 15

Specifications for Reusability for 3500 Engine Oil Pump Components.
Item	Description	Part Number 7W-0053		Part Number 4P-5638 245-6771 372-5733		Part Number 106-9872 273-1587		Part Number 231-5127 395-4207 441-0039 485-4728
		Maximum	Minimum	Maximum	Minimum	Maximum	Minimum	Maximum	Minimum
(A)	Length of gears for the oil pump.	54.015 mm (2.1266 inch)	53.985 mm (2.1254 inch)	84.015 mm (3.3077 inch)	83.985 mm (3.3065 inch)	110.015 mm (4.3313 inch)	109.985 mm (4.3301 inch)	110.015 mm (4.3313 inch)	109.985 mm (4.3301 inch)
(A2)	Depth of bores for gears for the oil pump.	54.170 mm (2.1327 inch)	54.130 mm (2.1311 inch)	84.170 mm (3.3138 inch)	84.130 mm (3.3122 inch)	110.170 mm (4.3374 inch)	110.130 mm (4.3358 inch)	110.170 mm (4.3374 inch)	110.130 mm (4.3358 inch)
(B)	Diameter of gear shafts	31.750 mm (1.2500 inch)	31.734 mm (1.2494 inch)	31.750 mm (1.2500 inch)	31.734 mm (1.2494 inch)	31.750 mm (1.2500 inch)	31.734 mm (1.2494 inch)	31.750 mm (1.2500 inch)	31.734 mm (1.2494 inch)
(B1)	Bore in bearings for the gear shafts after assembly	31.824 mm (1.2529 inch)	31.798 mm (1.2519 inch)	31.824 mm (1.2529 inch)	31.798 mm (1.2519 inch)	31.824 mm (1.2529 inch)	31.798 mm (1.2519 inch)	31.824 mm (1.2529 inch)	31.798 mm (1.2519 inch)
(B2)	Bore in oil pump body for bearings	34.950 mm (1.3760 inch)	34.920 mm (1.3748 inch)	34.950 mm (1.3760 inch)	34.920 mm (1.3748 inch)	34.950 mm (1.3760 inch)	34.920 mm (1.3748 inch)	34.950 mm (1.3760 inch)	34.920 mm (1.3748 inch)
(C)	Distance of the extension of the dowels from the cover	7.0 mm (0.28 inch)	5.0 mm (0.20 inch)	7.0 mm (0.28 inch)	5.0 mm (0.20 inch)	7.0 mm (0.28 inch)	5.0 mm (0.20 inch)	7.0 mm (0.28 inch)	5.0 mm (0.20 inch)
(D)	Distance from the end of the idler shaft of the pump to the gear face.	34.5 mm (1.36 inch)	33.5 mm (1.32 inch)	34.5 mm (1.36 inch)	33.5 mm (1.32 inch)	34.5 mm (1.36 inch)	33.5 mm (1.32 inch)	34.5 mm (1.36 inch)	33.5 mm (1.32 inch)
(E)	Distance from the end of the pump drive shaft to the gear face.	47.5 mm (1.87 inch)	46.5 mm (1.83 inch)	47.5 mm (1.87 inch)	46.5 mm (1.83 inch)	47.5 mm (1.87 inch)	46.5 mm (1.83 inch)	47.5 mm (1.87 inch)	46.5 mm (1.83 inch)
(F)	Depth of installation for bearings in cover	2.0 mm (0.08 inch)	1.0 mm (0.04 inch)	2.0 mm (0.08 inch)	1.0 mm (0.04 inch)	2.0 mm (0.08 inch)	1.0 mm (0.04 inch)	2.0 mm (0.08 inch)	1.0 mm (0.04 inch)
(G)	Depth of installation of bearings in body	2.0 mm (0.08 inch)	1.0 mm (0.04 inch)	2.0 mm (0.08 inch)	1.0 mm (0.04 inch)	2.0 mm (0.08 inch)	1.0 mm (0.04 inch)	2.0 mm (0.08 inch)	1.0 mm (0.04 inch)
(H)	Spring for pressure relief valve	Part Number 2S-2760		Part Number 2S-2760		Part Number 107-7175		Part Number 417-2406
	Length under test force	117.9 mm (4.64 inch)	N/A	117.9 mm (4.64 inch)	N/A	107.16 mm (4.219 inch)	N/A	102 mm (4.016 inch)	N/A
	Test force.	517 N (116.2 lb)	463 N (104.1 lb)	517 N (116.2 lb)	463 N (104.1 lb)	576 N (129.5 lb)	536 N (120.5 lb)	762 N (171.3 lb)	690 N (155.1 lb)
	Free length after the test.	152.9 mm (6.02 in)	N/A	152.9 mm (6.02 in)	N/A	144.4 mm (5.69 in)	N/A	144.4 mm (5.69 in)	N/A
	Outside diameter	27.00 mm (1.063 inch)	N/A	27.00 mm (1.063 inch)	N/A	27.00 mm (1.063 inch)	N/A	27.00 mm (1.063 inch)	N/A
(J)	Diameter of valve spool	35.637 mm (1.4030 inch)	35.611 mm (1.4020 inch)	35.637 mm (1.4030 inch)	35.611 mm (1.4020 inch)	35.637 mm (1.4030 inch)	35.611 mm (1.4020 inch)	35.637 mm (1.4030 inch)	35.611 mm (1.4020 inch)
(K)	Position bearing junction from the centerline through the bearing bores to an angle of 45 ± 15 degrees. (1)	60 degrees	30 degrees	60 degrees	30 degrees	60 degrees	30 degrees	60 degrees	30 degrees

(1)	The junction must be within the minimum and maximum tolerances.

C175 Engine Oil Pump

Illustration 33	g06305700

Table 16

Specifications for Reusability for C175 Engine Oil Pump Components For C175-20 machine applications, the drive side of the 341-2500 and 527-6204 oil pumps are not reusable. The 532-8727 oil pump utilizes a larger diameter drive shaft and can be reused at overhaul. The driven side is reusable in all pumps, given that it meets other reuse criteria.
Item	Name	Part Number 340-9259		Part Number 340-9261		Part Number 341-2503		Part Number 416-9858		Part Number 296-5590 341-2500 527-6204		Part Number 532-8727
		Minimum	Maximum	Minimum	Maximum	Minimum	Maximum	Minimum	Maximum	Minimum	Maximum	Minimum	Maximum
A	Length of gears	121.907 mm (4.7995 inch)	121.933 mm (4.8005 inch)	137.147 mm (5.3995 inch)	137.173 mm (5.4005 inch)	150.407 mm (5.9215 inch)	150.433 mm (5.9225 inch)	91.293 mm (3.59421 inch)	91.303 mm (3.59460 inch)	107.98 mm (4.2511 inch)	108.02 mm (4.2528 inch)	107.98 mm (4.2511 inch)	108.02 mm (4.2528 inch)
	Depth of bores for gears	122.035 mm (4.8045 inch)	122.075 mm (4.8060 inch)	137.28 mm (5.4047 inch)	137.32 mm (5.4063 inch)	150.535 mm (5.9265 inch)	150.575 mm (5.9281 inch)	91.48 mm (3.60157 inch)	91.52 mm (3.60314 inch)	108.18 mm (4.2590 inch)	108.22 mm (4.2606 inch)	108.18 mm (4.2590 inch)	108.22 mm (4.2606 inch)
B	Diameter of gear shafts	50.788 mm (1.9995 inch)	50.798 mm (1.9999 inch)	50.788 mm (1.9995 inch)	50.798 mm (1.9999 inch)	50.788 mm (1.9995 inch)	50.798 mm (1.9999 inch)	59.923 mm (2.35917 inch)	59.933 mm (2.35956 inch)	59.923 mm (2.35917 inch)	59.933 mm (2.35956 inch)	59.923 mm (2.35917 inch)	59.933 mm (2.35956 inch)
	Bore in bearings for the gear shafts after assembly	50.878 mm (2.0030 inch)	50.958 mm (2.0062 inch)	50.878 mm (2.0030 inch)	50.958 mm (2.0062 inch)	50.878 mm (2.0030 inch)	50.958 mm (2.0062 inch)	60.006 mm (2.36244 inch)	60.072 mm (2.36503 inch)	60.011 mm (2.36263 inch)	60.067 mm (2.36484 inch)	50.878 mm (2.0030 inch)	50.958 mm (2.0062 inch)
	Bore in oil pump body for bearings	55.647 mm (2.1908 inch)	55.663 mm (2.1914 inch)	55.647 mm (2.1908 inch)	55.663 mm (2.1914 inch)	55.647 mm (2.1908 inch)	55.663 mm (2.1914 inch)	66.042 mm (2.60007 inch)	66.058 mm (2.60070 inch)	66.042 mm (2.60007 inch)	66.058 mm (2.60070 inch)	55.647 mm (2.1908 inch)	55.663 mm (2.1914 inch)
C	Distance of the extension of the dowels from the cover	7.5 mm (0.30 inch)	8.5 mm (0.34 inch)	7.5 mm (0.30 inch)	8.5 mm (0.34 inch)	7.5 mm (0.30 inch)	8.5 mm (0.34 inch)	7.5 mm (0.30 inch)	8.5 mm (0.34 inch)	7.5 mm (0.30 inch)	8.5 mm (0.34 inch)	7.5 mm (0.30 inch)	8.5 mm (0.34 inch)
D	Distance from the end of the idler shaft of the pump to the gear face	41 mm (1.6 inch)	42 mm (1.6 inch)	41 mm (1.6 inch)	42 mm (1.6 inch)	41 mm (1.6 inch)	42 mm (1.6 inch)	43 mm (1.69291 inch)	44 mm (1.73228 inch)	43 mm (1.69291 inch)	44 mm (1.73228 inch)	43 mm (1.69291 inch)	44 mm (1.73228 inch)
E	Distance from the end of the pump drive shaft to the gear face	91.35 mm (3.596 inch)	91.45 mm (3.600 inch)	91.35 mm (3.596 inch)	91.45 mm (3.600 inch)	91.35 mm (3.596 inch)	91.45 mm (3.600 inch)	114.40 mm (4.50393 inch)	115.4 mm (4.54330 inch)	70.9 mm (2.79133 inch) (1) 114.40 mm (4.50393 inch)	71.9 mm (2.83070 inch) (1) 115.4 mm (4.54330 inch)	114.40 mm (4.50393 inch)	115.4 mm (4.54330 inch)
F	Depth of installation for bearings in cover	1 mm (0.04 inch)	2 mm (0.08 inch)	1 mm (0.04 inch)	2 mm (0.08 inch)	1 mm (0.04 inch)	2 mm (0.08 inch)	1 mm (0.04 inch)	2 mm (0.08 inch)	1 mm (0.04 inch)	2 mm (0.08 inch)	1 mm (0.04 inch)	2 mm (0.08 inch)
G	Depth of bearings in body	1.25 mm (0.049 inch)	1.75 mm (0.069 inch)	1.25 mm (0.049 inch)	1.75 mm (0.069 inch)	1.25 mm (0.049 inch)	1.75 mm (0.069 inch)	1.25 mm (0.049 inch)	1.75 mm (0.069 inch)	1.25 mm (0.049 inch)	1.75 mm (0.069 inch)	1.25 mm (0.049 inch)	1.75 mm (0.069 inch)

(1)	For part number 296-5590.

Inspection of Oil Pump Drive Shaft within 532-8727 Oil Pumps

Before reusing oil pump drive shaft use these illustrations to help identify if the shaft that may be used again. These illustrations cannot guarantee that any individual shaft can be reused. There is always some risk of failure. Experience and careful inspection is the best guideline for proper reusing the shaft.

Illustration 34	g06312173
Tooth wear pattern is shown in this illustration with a slight step. Step is barely felt when your nail runs along the surface. Wear pattern appears normal. USE THIS PART AGAIN

Illustration 35	g06312175
The illustration shows tooth wear pattern. Wear pattern appears normal. USE THIS PART AGAIN

Illustration 36	g06312183
The end of the tooth has been rounded off on both ends. DO NOT USE THIS PART AGAIN

Illustration 37	g06312189
The illustration shows uneven wear pattern. DO NOT USE THIS PART AGAIN

Illustration 38	g06312190
The illustration shows extreme uneven wear pattern. DO NOT USE THIS PART AGAIN

Assembly Procedure of Oil Pump

The following steps are for the assembly of the oil pump.

Illustration 39	g06305701
For the correct placement of the junction of the sleeve bearing in the pump body assembly, refer to Table 15 for specifications.

Note: During the installation of the sleeve bearings, the alignment of the bearing junction should be 45 ± 15° from the centerline of the bearing bores. Refer to specification (K) that is shown in Table 15 and illustration 30 and 39.

1. Use 1P-0510 Driver to install a sleeve bearing (6) into the pump body assembly. Refer to illustration 30. Drive the bearings into the body until the bearings measure 1.5 ± 0.5 mm (0.06 ± 0.02 inch) below the face of the gear bore. Refer to item (G) in Table 15. Check the inside diameter (ID) of the bearings after installation. The ID must be 31.811 ± 0.013 mm (1.2524 ± 0.0005 inch). Refer to item (B) in Table 15.

2. Heat the gears to a maximum temperature of 316° C (600° F).

3. Install the gears on the idler shaft assembly (4) until the gears measure 34.0 ± 0.5 mm (1.34 ± 0.02 inch) from the end of the idler shaft to the gear face. Refer to item (D) in table 15. Install the gear on drive shaft assembly (9) until the gear measures 47.0 ± 0.5 mm (1.85 ± 0.02 inch) from the end of the drive shaft to the gear face.

4. Make sure that both hollow dowels (3) are installed in the cover assembly so the dowels extend 6.0 ± 1.0 mm (0.24 ± 0.04 inch) above the surface of pump cover assembly (1). Refer to item (E) in Table 15.
   Show/hide table

   Illustration 40	g06305702
   Placement of junction of the sleeve bearing in the pump cover assembly. Refer to Table 15 for specifications.

5. Use 1P-0510 Driver to install the sleeve bearings (2) into the pump cover assembly with the junction of the bearings in the correct position (K) in Illustration 39. Drive the bearings into the cover until the bearings measure 1.5 ± 0.5 mm (0.06 ± 0.02 inch) below the face of the pump cover. Refer to item (F) in Table 15.

6. Put the pump cover assembly in position. Then bolt the cover assembly to the body assembly. Wipe the spool for the pressure relief valve (7) with clean engine oil. Install the spool (7), the spring (8), and the gasket. Bolt the cover for the pressure relief valve (10) to the body assembly.

Specifications for Measurement of the C175 Oil Scavenge Pump

Illustration 41	g06305704

Table 17

Specifications for Reusability for C175 Engine Oil Scavenge Pump Components(1)
Item	Name	Part Number 342-7800 524-1308
		Minimum	Maximum
A	Length of gears	147.307 mm (5.7995 inch)	147.333 mm (5.8005 inch)
	Depth of bores for gears	147.440 mm (5.8047 inch)	147.480 mm (5.8063 inch)
B	Diameter of gear shafts	50.787 mm (1.9995 inch)	50.958 mm (2.0062 inch)
	Bore in bearings for the gear shafts after assembly	50.878 mm (2.0031 inch)	50.958 mm (2.0062 inch)
	Bore in oil pump body for bearings	50.878 mm (2.0031 inch)	50.958 mm (2.0062 inch)
C	Distance of the extension of the dowels from the cover	7.500 mm (0.2953 inch)	8.500 mm (0.3346 inch)
D	Distance from the end of the idler shaft of the pump to the gear face	41.100 mm (1.6181 inch)	42.100 mm (1.65748 inch)
E	Distance from the end of the pump drive shaft to the gear face	41.100 mm (1.6181 inch)	42.100 mm (1.65748 inch)
F	Depth of installation for bearings in cover	1.000 mm (0.0394 inch)	2.000 mm (0.0787 inch)
G	Depth of bearings in body	1.000 mm (0.0394 inch)	2.000 mm (0.0787 inch)

(1)	Oil pump shafts are not reusable.

Note: Oil pump shafts are currently not reusable.

Assembly Procedure for C175 Oil Scavenge Pump

Illustration 42	g06305706
(A) ( B) Split in the Cap Bearings (C) ( D) Split in the Body Bearings

During the installation of the sleeve bearings, the split in the bearings should be 30° from the centerline of the bearing bores, as shown. Use 1P-0510 Driver to install a sleeve bearing (6). Be sure to install the bearings to the correct depth.

C175 Pressure Regulator and Pressure Relief Valve

The pressure regulator and pressure relief valve are one combined assembly on C175 engines. The pressure regulator on the C175 engines monitors main engine oil galley pressure and maintains oil pressure independent of engine speed. The relief valve relieves the system if there happens to be a pressure spike.

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

Illustration 43	g03049898

Table 18

Part Number	Finish Size
4L-6758	31.699 ± 0.008 mm (1.2480 ± 0.0003 inch)

Part Description

Table 19

Base Metal	Alloy Steel
Hardness

Flame Spray Equipment and Procedure

Table 20

Maximum Surface Texture	0.51 µm (20.07874 µinch)
Reason for Spraying	Wear
Metco Equipment Type	6P-II
Metco Material	447 Grind 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 46 J or K
Other Equipment Type	Polisher
Media Recommendation	400 Grit Emery
Remarks

Table 21

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 (Protect keyway with brass key slightly above finish diameter. Remove brass key after grinding.)
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
Mask for Spray	Tape and paint with Anti-Bond
Spray Equipment Type	6P
Auxiliary Cooling	A J Siphon
Nozzle	6P7C-K "K" Nozzle
Air Capacity/Pressure	6P-3 Cool side out - 170 kPa (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 (12.00 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) minimum
Gun Fixturing Method	Hand held
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 3500 Engine Oil Pump

Illustration 44	g03083182
Note: Face E Flatness 0.025 mm (0.001 inch)

Table 22

3500 Engine - Oil Pump Cover
Diameter (A)	Length (B)	Length (C)	Angle (D)
34.935 ± 0.015 mm (1.37539 ± 0.00059 inch)	34.00 ± 1.0 mm (1.33858 ± 0.03937 inch)	1.0 ± 0.25 mm (0.03937 ± 0.00984 inch)	30° ± 1°

Illustration 45	g03335028

Table 23

3500 Engine - Oil Pump Body
Model	Length (A)	Length (B)	Diameter (C)
3508, 3508B	163.0 ± 0.5 mm (6.41731 ± 0.01969 inch)	54.15 ± 0.02 mm (2.13189 ± 0.00079 inch)	71.33 ± 0.025 mm (2.80826 ± 0.00098 inch)
3512, 3516, 3524B		84.15 ± 0.02 mm (3.31299 ± 0.00079 inch)
3512, 3516, 3516B, 3524B	189.0 ± 0.5 mm (7.44093 ± 0.01969 inch)	110.15 ± 0.02 mm (4.33661 ± 0.00079 inch)

Part Description

Table 24

Base Metal	Cover: Gray Iron Casting Body: Ductile Iron Casting
Hardness	-

Arc Spray Equipment and Procedure

Table 25

Maximum Surface Texture	1.6 µm (62.99213µinch)
Reason for Spraying	Cavitation Erosion
Arc Spray Equipment Type	SmartArc by Oerlikon Metco,TAFA 8830 MHU, or TAFA 8835 MHU
Wire	TAFA 30T Wire Top Coat, TAFA 75B Wire Bond Coat
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 arc on area to be sprayed
Substrate Temperature During Spraying Not to Exceed	148° C (300° F)
Auxiliary Cooling	Filtered shop air
Rotation/Traverse Speed	11.0 SMPM (40.00 SFPM)
Surface Preparation Method	Undercut and Grit blast If the entire surface is to receive an arc spray coating, some shops prefer to undercut or pre-grind the entire surface. This allows for a recommended minimum 0.25 mm (0.010 inch) coating, produces an even coating, reduce both cost and finish machining time.
Machining Method	Machine or Grind
Recommended Cutting Tool	ISCAR DNMG 432TFIC507
Blast Media Recommendation	Pressure Type Only (Aluminum Oxide Grit)
Finishing Equipment Type	Horizontal or Vertical Boring Machine
Grinding Equipment	Surface Grinder
Recommended Abrasive	Norton 23A30E12VBEP or equivalent
Remarks	A low spot repair should not be considered unless at least 0.05 to 0.08 mm (0.002 to 0.003 inch) can be removed from the cover thickness during grinding.

Table 26

Arc Spray		Procedure		Check List
Clean Part		Degrease in hot caustic solution
Undercut		If the entire surface is to receive an arc spray coating, some shops prefer to undercut or pre-grind the entire surface. This allows for a recommended minimum 0.25 mm (0.010 inch) coating, produces an even coating, reduce both cost and finish machining time.
Remove Oxide		Use fiber flap brush or Clean/strip disc or glass bead
Clean Spray Area		Commercial degreaser
Mask for Grit Blast		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		Casting relief areas, bolt holes, dowel pin holes and bearing bases can be masked with Metco Anti-Bond, blue layout dye, silicon rubber, bulk ceramic fiber, or a combination of these materials.
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
	Traverse Rate of Gun	11.0 SMPM (40.00 SFPM)
Gun Fixturing Method		Machine mount or hand held
Finishing Equipment		Surface Grinder or Milling Machine
Part/Cutter Rotation Roughing		Grind - Refer to wheel specifications Machine - 50.0 SMPM (150.00 SFPM)
Part/Cutter Rotation Finishing		Grind - Refer to wheel specifications Machine - 75.0 SMPM (250.00 SFPM)
Coolant		Oil base synthetic - 40:1 ratio
Traverse Speed		Grind - Refer to wheel specifications Machine - 0.30 mm (0.012 inch) per revolution
Depth of Rough Cut		Grind - 0.04 mm (0.0015 inch) Machine - 0.51 mm (0.020 inch)
Depth of Finish Cut		Grind - 0.01 mm (0.0005 inch) Machine - 0.25 mm (0.010 inch)
Additional Finish Method		Grind - Coating should be ground back to base on edges where possible

Flame Spray Equipment and Procedure

Table 27

Maximum Surface Texture	1.6 µm (62.99213µinch)
Reason for Spraying	Cavitation Erosion
Oerlikon Metco Equipment Type	6P-II by Oerlikon Metco
Oerlikon 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 Speed	15.3 SMPM (50.00 SFPM)
Rotation Speed	91.4 SMPM (300.00 SFPM)
Surface Preparation Method	Undercut and Grit blast If the entire surface is to be built up, you may choose to undercut or pre-grind the entire area. This allows for a recommended minimum 0.25 mm (0.010 inch) coating, reduces technique dependency in producing an even coating and can reduce both cost and finish machining time.
Finishing Method	Machine or Grind
Grinding Equipment Type	Surface Grinder
Recommended Wheel	Norton 23A 30E12VBEP or SGL abrasive H5A24F13-VKP
Machining Equipment Type	Horizontal or Vertical Boring Machine
Recommended Cutter Grade	C-2, 883 Carboloy, or equivalent
Media Recommendation	Metcolite "C" or equivalent
Remarks	A low spot repair should not be considered unless at least 0.05 to 0.08 mm (0.002 to 0.003 inch) can be removed from the cover thickness during grinding or unless the repair is to be finished by hand to blend the coating.

Table 28

Flame Spray Process (6P)	Procedure	Check List
Clean Part	Degrease in hot caustic solution
Undercut	If the entire surface is to be built up, you may choose to undercut or pre-grind the entire area. This allows for a recommended minimum 0.25 mm (0.010 inch) coating, reduces technique dependency in producing an even coating and can reduce both cost and finish machining time.
Remove Oxide	Use fiber flap brush, Clean/strip disc
Clean Spray Area	Metco cleaning solvent or equivalent
Mask for Grit Blast	Duct Tape, metal shield, or rubber
Grit Blast Equipment	Pressure type only
Grit Type and Size	Metcolite "C" or equivalent
Blast Air Pressure	310 kPa (45.0 psi)
Blast Nozzle to Work Distance	50 mm (2.0 inch)
Remove Blast Mask	Remove mask, make sure that surface is clean
Mask for Metal Spray	Casting relief areas, bolt holes, dowel pin holes and bearing bases can be masked with Metco Anti-Bond, blue layout dye, silicon rubber, bulk ceramic fiber, or a combination of these materials.
Metal 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	178 mm (7.0 inch)
Traverse Rate of Gun	15.3 SMPM (50.00 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	Surface Grinder or Milling Machine
Part/Cutter Rotation	Grind - Refer to wheel specifications Machine - 45.7 SMPM (150.00 SFPM)
Traverse Speed (Rough Cut)	Grind - Refer to wheel specifications Milling - 203 mm (8.0 inch) per min.
Traverse Speed (Finish Cut)	Grind - Refer to wheel specifications Milling - 38.1 to 0.51 mm (1.50 to 2.00 inch) per min
Depth of Rough Cut	Grind - 0.03 to 0.05 mm (0.001 to 0.002 inch) Milling - 0.38 to 0.51 mm (0.015 to 0.020 inch)
Depth of Finish Cut	Grind - 0.03 mm (0.001 inch) Milling - 0.25 to 0.38 mm (0.010 to 0.015 inch)
Additional Finish Method	Grind - Sparkout (Coating should be ground back to base on edges where possible) Milling - none

Thermal Spray Procedures for Oil Pump Manifold

Illustration 46	g03072137

Illustration 47	g03339409

Table 29

Part Number	Dimension
3P-0365	44.7 ± 0.25 mm (1.76 ± 0.010 inch)

Part Description

Table 30

Base Metal	Gray Iron
Hardness	-

Flame Spray Equipment and Procedure

Table 31

Maximum Surface Texture	1.6 µm (62.99213µinch)
Reason for Spraying	Wear occurring around oil ports
Mating Part Contact Area & Material	Gear
Metco Equipment Type	6P-II
Metco Material	452 or 453
Metco Sealer	185
Finished 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)
Substrate Temperature During Spraying Not to Exceed	148° C (300° F)
Auxiliary Cooling	If desired
Rotation/Traverse Device	Lathe or turntable
Rotation/Traverse Speed	8.7 to 10.5 SMPM (250.00 to 300.00 SFPM)
Surface Preparation Method	Undercut and Grit Blast
Finishing Method	Machine
Recommended Cutter Grade	883 Carboloy or equivalent
Other Equipment Type	Polish
Media Recommendation	Emery

Table 32

Flame Spray Process (6P)	Procedure	Check List
Clean Part	Degrease in hot caustic solution
Remove Oxide	Clean/strip disc or fiber flap brush
Mask for Blast	Duct Tape, metal mask, or rubber plugs
Blast Equipment	Pressure
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
Spray Equipment Type	6P-II
Nozzle	6P-C7-K "K" Nozzle
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 lb) per hour or 90 g (3.2 oz) per min
Gun to Work Distance	230 mm (9.0 inch)
Rotation Speed of Part (RPM)	200 RPM
Rotation Speed of Part (SFPM)	91.4 SMPM (300.00 SFPM)
Traverse Rate of Gun (SFPM)	15.24 SMPM (50.000 SFPM)
Gun Fixturing Method	Machine mount
Top Coat/Thickness	0.10 to 0.15 mm (0.004 to 0.006 inch) per pass
Finishing Equipment	Lathe
Part/Cutter Rotation (SFPM)	10.5 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	If desired, emery polish

Thermal Spray Procedures for Gear Shafts for Gear Pumps

Illustration 48	g03078976

Table 33

Dimensions
A	15.667 ± 0.008 mm (0.6168 ± 0.0003 inch)
B	15.867 ± 0.008 mm (0.6247 ± 0.0003 inch)
C	18.820 ± 0.008 mm (0.7410 ± 0.0003 inch)
D	18.852 ± 0.005 mm (0.7422 ± 0.0002 inch)
E	22.217 ± 0.005 mm (0.8747 ± 0.0002 inch)
F	31.742 ± 0.005 mm (1.2497 ± 0.0002 inch)
G	41.232 ± 0.005 mm (1.6233 ± 0.0002 inch)
H	50.240 ± 0.08 mm (1.978 ± 0.003 inch)

Table 34

Part No.	Dimension Callout	Part No.	Dimension Callout	Part No.	Dimension Callout	Part No.	Dimension Callout
9F-6665	C	9M-8178	F	115-0639	F	7S-6973	F
9F-6666	C	9M-8281	F	114-4680	F	7S-7601	A
7G-1014	E	9M-8282	F	8P-6848	F	7S-8596	F
7G-1015	E	1P-0634	F	8P-6849	F	7S-8628	F
7G-1057	E	1P-0980	F	8P-8165	F	7S-8657	F
7G-2243	F	1P-0981	F	8P-8211	E	8S-0678	F
7G-2244	F	1P-1989	E	8P-8212	E	8S-0679	F
7G-2539	E	1P-1990	E	8P-9733	F	8S-3377	E
7G-2540	E	1P-2186	E	9P-3463	B	8S-3442	F
7G-3207	G	1P-4230	F	9P-3464	B	8S-3443	F
7G-3208	G	1P-6746	E	9P-7473	E	8S-9163	F
7G-5710	E	1P-8184	E	9P-7474	E	9S-4386	F
7G-6784	F	1P-9654	E	1S-0088	F	9S-6586	A
7G-9721	G	1P-9655	E	1S-3728	F	9S-6789	F
7G-9722	G	2P-1966	F	2S-0151	F	9S-9385	F
9G-0635	G	2P-5768	F	2S-0152	F	9S-9931	F
9G-0637	G	2P-5774	F	2S-0167	F	3T-3699	F
9G-2805	E	2P-9319	F	2S-0168	F	3T-3701	F
9G-7411	G	2P-9321	F	2S-0691	F	3T-5672	F
9G-7412	G	2P-9332	E	2S-3610	F	3T-5674	F
9G-9544	F	3P-0256	F	2S-3611	F	3T-6989	F
9G-9545	F	3P-0258	F	2S-5841	F	3T-6990	F
9G-9900	F	3P-0377	F	2S-7918	E	3T-7880	F
9G-9901	F	3P-0877	F	2S-7919	E	3T-7882	F
1H-6361	A	3P-0881	F	2S-8574	F	3T-8085	F
5H-3298	D	3P-4575	F	2S-8575	F	3T-8086	F
5H-3417	D	3P-4576	F	3S-2613	G	3T-8093	F
5H-3470	D	116-4625	F	3S-2614	G	3T-8927	F
9H-5761	F	3P-4629	E	3S-4380	F	3T-9904	F
9H-5775	F	3P-4850	F	3S-4382	F	3T-9905	F
3K-2345	H	3P-4851	F	3S-4383	E	6T-1540	F
2M-3400	F	3P-7619	F	3S-4384	E	6T-1541	F
4M-0503	F	3P-7620	F	3S-7254	E	6T-1542	F
4M-0504	F	3P-7783	F	3S-8799	A	6T-3931	F
7M-6595	F	3P-7784	F	4S-5978	F	6T-3932	F
8M-1480	B	3P-7790	F	4S-6777	F	6T-4263	F
8M-1481	B	3P-7791	F	4S-6778	F	6T-4264	F
8M-2586	F	3P-7959	G	4S-8659	E	6T-4416	E
8M-2592	F	3P-7960	G	4S-9000	E	6T-4417	E
8M-6144	F	3P-8019	F	4S-9001	E	6T-4844	F
8M-9563	F	3P-8881	F	5S-1598	E	7T-4330	F
9M-1166	F	3P-8883	F	5S-1599	E	7T-5656	F
9M-1721	F	6P-4965	F	5S-3682	E	7T-5657	F
9M-1722	F	6P-4966	F	5S-3683	E	7T-6751	F
9M-1723	F	6P-7357	F	5S-4383	F	7T-6752	F
9M-2200	F	6P-8328	F	7S-2903	E	9W-3270	F
9M-4356	F	8P-4547	F	7S-3882	F	9W-3713	F
9M-4382	F	115-0640	F	7S-4488	F	9W-9018	F
9M-5452	F	114-4682	F	7S-4579	F	6Y-0186	F
9M-8177	F	8P-4548	F	7S-6972	F	6Y-0187	F

Part Description

Table 35

Base Metal	1018 or 4118
Hardness	50 Rc

Flame Spray Equipment and Procedure

Table 36

Maximum Surface Texture	0.51 µm (20.07874 µinch)
Reason for Spraying	Wear, bearing failure
Mating Part Contact Area & Material	Bearing
Metco Equipment Type	Metco 6P-II
Metco Material	453
Finished Thickness	As Required
Finishing Allowance	0.51 mm (0.020 inch) to 0.64 mm (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 Speed	91.4 SMPM (300.00 SFPM)
Surface Preparation Method	Undercut and Grit blast
Finishing Method	Machine
Machining Equipment Type	Lathe
Recommended Cutter Grade	C2-883 Carboloy or equivalent

Table 37

Flame Spray Process (6P)	Procedure	Check List
Clean Part	Degrease in hot caustic solution
Undercut	To "tru-up" surface
Remove Oxide	Use fiber flap brush; Clean/strip disc
Mask for Blast	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 blue layout dye
Spray Equipment Type	6PH-II Thermo Spray System
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 g (3.2 oz) per min
Gun to Work Distance	230 mm (9.0 inch)
Rotation Speed of Part (RPM)	RPM varies depending on shaft diameter
Rotation Speed of Part (SFPM)	91.4 SMPM (300.00 SFPM)
Traverse Rate of Gun (SFPM)	15.24 SMPM (50.000 SFPM)
Gun Fixturing Method	Hand Held or Machine Mount
Top Coat/Thickness	0.10 to 0.15 mm (0.004 to 0.006 inch) per pass
Finishing Equipment	Lathe
Part/Cutter Rotation (SFPM)	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 for desired polish

Storage Procedure

Proper protection of the individual parts within the oil pump, oil pump assemblies, and front housings from corrosion is important. Corrosion will start in as little as one hour after the individual parts within the oil pump, oil pump assemblies and front housings has been cleaned.

When the individual parts within the oil pump, oil pump assemblies and front housings will not be inspected for one hour or less the individual parts within the oil pump, oil pump assemblies and front housings should be coated with a rust or corrosion inhibitor or coated with clean engine oil. The individual parts within the oil pump, oil pump assemblies, and front housings should be individually wrapped to prevent contamination, and the individual parts within the oil pump, oil pump assemblies, and front housings should be stored in a protected area to avoid damage. See Illustration 49.

When the individual parts within the oil pump, oil pump assemblies and front housings will not be inspected in two days or more the individual parts within the oil pump, oil pump assemblies and front housings should be coated with a rust or corrosion inhibitor or coated with clean engine oil and the individual parts within the oil pump, oil pump assemblies and front housings should be individually wrapped. The wrapped individual parts within the oil pump, oil pump assemblies, and front housings 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 individual parts within the oil pump, oil pump assemblies, and front housings. See Illustration 50.

Refer to SEHS9031, "Special Instruction""Storage Procedure for Caterpillar Products" for more information on storage of components.

Illustration 49	g06278538
Example of protection for a component that is stored for a shorter term

Illustration 50	g06278539
Example of protection for a component that is stored for a longer term