Hydraulic Gear Pumps Used in Transmissions {3066, 5073} Caterpillar


Hydraulic Gear Pumps Used in Transmissions {3066, 5073}

Usage:

769C 01X
Articulated Truck
All
Compact Wheel Loader
All
Earthmoving Compactor
All
Integrated Toolcarrier
All
Landfill Compactor
All
Load Haul Dump
All
Motor Grader
All
Off-Highway Truck/Tractor
All
Pipelayer
All
Soil Compactor
All
Track-Type Loader
All
Track-Type Skidder
All
Track-Type Tractor
All
Underground Articulated Truck
All
Wheel Dozer
All
Wheel Feller Buncher
All
Wheel Loader
All
Wheel Skidder
All
Wheel Tractor-Scraper
All

Introduction

Table 1
Revision  Summary of Changes in SEBF8161 
24  Updated Effectivity. 
24  Updated Effectivity. 
23  Updated Effectivity. 
22  Updated Effectivity. 

© 2018 Caterpillar All Rights Reserved. This guideline is for the use of Caterpillar Dealersonly. 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 guideline enables dealers and dealer customers to benefit from cost reductions made possible through an established parts reusability and salvage program. Every effort has been made to provide the most current information known to Caterpillar Inc. Since the company makes ongoing product changes and product improvements, this guideline must be used with the latest technical information. Using the latest technical information available from Caterpillar ensures that such changes and improvements are incorporated where applicable.

For questions or additional information concerning this guideline, submit a feedback form in the Service Information System web site. To address an urgent need, use the following to forward your request to Caterpillar Repair Process Engineering:

  • Cat Dealer Technical Communicator

  • Global Dealer Solution Network

  • Cat Technical Representative

  • Knowledge Network

Canceled Part Numbers and Replaced Part Numbers

This document may 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.

Summary

This guideline shows visual examples of worn hydraulic pump parts used on Caterpillar machines. Specifically, this guideline shows illustrations of gear pump parts, which can or cannot be used again with or without salvage (reconditioning) operations. This practical information is a list of items to remember any time you work with hydraulic gear pump parts. The list includes some basic reuse rules.

Parts that can be used again in the same application, according to this guideline, can be expected to give normal performance until the next overhaul.

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.

Improper operation, lubrication, maintenance, or repair of this product is dangerous. Improper methods could result in injury or death.

Do not operate or perform any lubrication, maintenance, or repair of this product, until you understand 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.

Hazards are identified by a safety alert symbol. Safety alert symbols are followed by a signal word such as "Warning" that is shown below.

------ 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. If a tool, a procedure, a work method, or an operating technique that is not recommended by Caterpillar is used, ensure that the procedure is safe for all personnel around the machine. Ensure that the product will not be damaged or that the product will not be made unsafe by the operation, lubrication, maintenance, or repair procedures.

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.

Safety

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

Sudden movement of the machine or release of oil under pressure can cause injury to persons on or near the machine.

To prevent possible injury, perform the procedure that follows before testing and adjusting the steering system.


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

Personal injury can result from hydraulic oil pressure and hot oil.

Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.

Make sure all of the attachments have been lowered, oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.



NOTICE

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.

Refer to Special Publication, PERJ1017, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products.

Dispose of all fluids according to local regulations and mandates.


  • Never install a part again if this guideline shows that the part cannot be used again.

  • Never use a part again if the part has wear or damage that is not shown in this guideline.

  • As you look to see if a given part is reusable, be sure to remember the parts "cause and effect" in relation to other parts. Failure, wear, or damage to one part can affect the performance of connected parts.

  • The following is an example of the source of a larger, future problem. There is light wear on the bearing diameter of the gear shaft. The wear is caused by contaminants (foreign material) that are embedded in the bearing bores. The condition of the bearing is not easily seen at this early stage. If a new bearing is not installed, the wear will gradually increase and cause a failure.


Illustration 3g01219580
Rear view of gear pump.

The parts in hydraulic pumps work together to give flow or torque. The efficiency of a unit is variable according to the flow loss that any given group of parts permits.

References

Table 2
References 
Media Number  Title 
NENG2500  "Dealer Service Tool Catalog" 
SEBF9236  "Fundamentals of High Velocity Oxygen Fuel (HVOF) Spray for Reconditioning Components" 
SEBF9238  "Fundamentals of Arc Spray for Reconditioning Components" 
SEBF9240  "Fundamentals of Flame Spray for Reconditioning Components" 
SEBF2129  "Thermal Spray Procedures for Tyrone Drive Shaft (Pump Gear)" 
SEBF2144  "Thermal Spray Procedures for Manifold - Oil Pump" 
Oerlikon Metco Inc.  www.oerlikon.com 

Tooling and Equipment

Table 3
Optional Tools 
Source  Description 
Lapmaster International (lapmaster.com)(lapmaster.com)  Lapping Machine 
Sunnen (sunnen.com)  Convex Barrel Lap Machine 
4C-8648  Cleaner (Hydrosolv 4110) 

Power Lapping Procedure

Power lapping can remove wear patterns and surface scratches. Power lapping will provide a "like new" surface flatness on parts. The power lapping machine can be used on a wide range of parts that require flat, smooth surfaces. Power lapping can produce flat surfaces within tolerances of one light band or 2.95 µm (116.0 microinch). Consistent surface finishes of 2 to 3 RMS (root-mean-square) with absolute uniformity are easily attained.

Lapping machines are easy to operate. However, some general guidelines must be followed. Check the lapping plates periodically, preferably every morning before starting production, to ensure lap plate flatness.

Fill the slurry tank with a lapping vehicle. The vehicle is purchased premixed and a lapping compound should be added to the vehicle at a rate of 240 mL (8.0 oz) per 3.8 L (1.00 US gal). Run the machine without parts for 4 to 6 minutes to allow the compound to mix evenly in the vehicle.

Load the parts to be lapped inside the conditioning rings. The parts should be free to move about within the ring and not packed such that the parts remain stationary. Lapping times will vary according to the severity of the flaw that is to be removed. Minor scratches or warpage can usually be removed within 30 to 60 minutes. To inspect the flatness of the lapped part, remove the dull finish that is caused by the lapping compound. Wash the part thoroughly. Polish the lapped surface, using 600 grit emery paper on a 4/0 polishing stand, until the part will reflect light.

Testing For Flatness



Illustration 4g03431728
Optical flat.

A monochromatic light source and an optical flat are required to determine flatness. Refer to Illustration 4.



Illustration 5g03431756
Light band pattern.

Test for flatness by observing the light, emitted from the monochromatic light head, reflecting from the surface being checked, up through the optical flat. A series of dark bands and light spaces will be projected. Refer to Illustration 5. The dark bands are not light rays, but show where interference is produced by reflections from the test piece in the optical flat. Inspect the light bands for straightness. If the bands are straight and parallel, the surface is flat. If the bands are curved, the surface is not flat but may be flat enough for your particular needs.

Flange, Plate, and Body Assemblies

Nomenclature



Illustration 6g01224155
(1) Seal
(2) Manifold As.
(3) Bearing
(4) Gear
(5) Body As.
(6) Bearing
(7) Manifold As.
(8) Washer
(9) O-ring Sea
(10) Bolt
(11) Plug
(12) Bolt
(13) Bolt
(14) Plug
(15) O-ring Sea
(16) O-ring Sea
(17) Dowel
(18) Gear As.

Cleaning and Inspection

Cleaning Procedure

Before a part is inspected, wash the part in a clean solvent that is made from petroleum. Wash each part separately. If several parts are washed together, there is a possibility that a machined surface can be damaged. Use compressed air to dry the part. Put hydraulic oil on the part to prevent rust or corrosion. Put the part in a clean container. Use a lint-free towel to clean the part before assembly. Put oil on all of the parts during assembly.

Note: When you handle or put pump parts in storage, care must be taken to prevent damage to the machined surfaces.

Inspection Procedure

Mounting Face



Illustration 7g03430493

Use again

Use again if the mounting face is free of scratches and nicks. Be sure that the damage does not extend to O-ring grooves and can be removed by hand lapping.

Gear Track



Illustration 8g03430450
Light wear-in of gear track and no raised burr along edge of track.

Use again

Use again if the damage caused by foreign material in the low-pressure side of the gear track will not have a negative effect on performance.



Illustration 9g03430490
Raised burr on side of gear track.

Do not use again

Do not use again if there is a raised burr of 0.30 to 0.40 mm (0.012 to 0.016 inch). A raised burr is an indication of potential reduced performance if this part is reused.



Illustration 10g03430511
Wear-in of gear track with raised burr along edge of track.

Do not use again

Do not use again if there is a raised burr of greater than 0.40 mm (0.016 inch). A raised burr indicates extreme wear-in and will not provide the efficiency expected from a rebuilt pump.

Cavitation



Illustration 11g03317226
Cavitation erosion on face of manifold surface.
(19) Root of Gear Tooth
(20) Edge of Outlet (Two Places)
(21) Cavitation Erosion Permitted in Cross Hatched Area

Use again

Use again if the cavitation erosion in one location has a depth less than 3 mm (0.12 inch) and has a surface area of 80 mm² (0.124 inch²) or less. The total cavitation erosion area should not exceed 30% of the shaded area including edge of the outlet. Cavitation erosion outside of the shaded area is unacceptable. Cavitation erosion in the area below the root of the gear tooth toward the bearing surfaces is unacceptable. Sharp or jagged edges will need to be removed.

Cracking



Illustration 12g03430517
Crack through bolt hole in body assembly.

Do not use again

Manifold Surface



Illustration 13g03430524
Scratches on face of manifold assembly.

Use again

Use again if scratches can be removed by power lapping or surface grinding.



Illustration 14g01221206
Gear has moved into face of cover. Blackened area may have a harder surface than the surrounding area.

Use Again

Use after damage has been removed by power lapping or grinding according to specification listed in Section “Salvage Specifications” in this guideline.

Refer to “Power Lapping Procedure” section in this guideline.

Cover Surface



Illustration 15g01221208
Gear has moved into the face of the cover.

Use again

Use again after damage has been removed by power lapping or grinding according to specification listed in Section “Salvage Specifications” in this guideline.



Illustration 16g01221214
Cover after grinding according to specifications listed in the Section“Salvage Specifications”.

Use again

Gear Shaft

Nomenclature



Illustration 17g01221218
Gear Shaft nomenclature
(A) Tooth Profile
(B) Tooth Face
(C) Spline
(D) Seal Area
(E) Bearing Area

Cleaning Procedure

Wash gears with a clean solvent made from petroleum. Clean carefully so as not to damage bearing areas. Removing discoloration (change of color) from the gears is not necessary. Discoloration is caused by oil and is acceptable.

Inspection Procedure

Bearing Area



Illustration 18g01221220
Bearing area shows light scratches that can be felt with a fingernail or pencil lead.

Use again

Use again after scratches are removed with 400 grit crocus cloth and motor oil. Install in a lathe and use a flat file behind the crocus cloth to polish bearing and tooth face areas.



Illustration 19g01221232
Grooves in the bearing area can be felt with a fingernail or pencil lead.

Use again

Use again after the bearing area is salvaged by using metal spray procedures.

Note: Worn or damaged surfaces which can be salvaged by chrome plating can also be salvaged by a metal spray process. See Reuse and Salvage Guideline, SEBF9236, "Fundamentals of High Velocity Oxygen Fuel (HVOF) Spray for Reconditioning Components", Reuse and Salvage Guideline, SEBF9238, "Fundamentals of Arc Spray for Reconditioning Components" and Reuse and Salvage Guideline, SEBF9240, "Fundamentals of Flame Spray for Reconditioning Components" for information about metal spray repair processes. You can also consult the metal spray equipment manufacturer for powder, machine settings, and machining information. Oerlikon Metco Inc. is one manufacturer of metal spray equipment. Check with the manufacturer of the metal spraying equipment for exact surface preparation and spraying recommendations.

Gear Face



Illustration 20g03431167
Gear face has experienced excessive heat and metal transfer.

Do not use again



Illustration 21g03431747
Gear is damaged due to contamination.

Do not use again

Tooth Face



Illustration 22g03431187
Gear has been overheated. Gear teeth are scratched and tooth profile shows wear damage.

Do not use again

Shaft Area



Illustration 23g01222103
Damage to end of second section drive gear.

Do not use again

Seal Area



Illustration 24g01222105
Grooves in the seal area can be felt with a fingernail or pencil lead.

Use again

Use again after the seal area is salvaged by Metal Spray procedures.

Salvage Specifications

The following information can be used to make repairs to the drive or idler gears. Use Metal Spray procedures to restore the diameter and surface finish to salvaged parts.

Table 4
Table B - Salvage Specifications 
Item  Gear Shaft Diameter  Surface Finish RA 
15.67 ± 0.01 mm (0.617 ± 0.0003 inch)  0.50 µm (19.7 microinch) 
15.87 ± 0.01 mm (0.625 ± 0.0003 inch)  0.50 µm (19.7 microinch) 
18.82 ± 0.01 mm (0.741 ± 0.0002 inch)  0.50 µm (19.7 microinch) 
18.85 ± 0.01 mm (0.742 ± 0.0002 inch)  0.50 µm (19.7 microinch) 
22.22 ± 0.01 mm (0.875 ± 0.0002 inch)  0.50 µm (19.7 microinch) 
31.74 ± 0.01 mm (1.245 ± 0.0002 inch)  0.50 µm (19.7 microinch) 
41.23 ± 0.01 mm (1.623 ± 0.0002 inch)  0.50 µm (19.7 microinch) 
50.24 ± 0.08 mm (1.978 ± 0.003 inch)  0.40 µm (16.0 microinch) 
50.80 ± 0.01 mm (1.999 ± 0.0002 inch)  0.20 µm (8.00 microinch) 

Table 5
Part No.  Name  Item 
8E-7763  Gear 
8E-7864  Gear 
8E-7877     
8E-7991  Gear 
8E-9279  Gear 
9F-6665  Gear 
9F-6666  Gear 
7G-1014  Gear 
7G-1015  Gear 
7G-1057  Gear 
7G-2243  Gear As. 
7G-2244  Gear As. 
7G-2539  Gear As. 
7G-2540  Gear As. 
7G-3207  Gear 
7G-3208  Gear 
7G-5710  Gear As. 
7G-6784  Gear As. 
7G-9721  Gear 
7G-9722  Gear 
9G-0635  Gear 
9G-0637  Gear 
9G-2805  Gear As. 
9G-7411  Gear 
9G-7412  Gear 
9G-9544  Gear As. 
9G-9545  Gear As. 
9G-9900  Gear As. 
9G-9901  Gear As. 
1H-6361  Gear 
5H-3298  Gear 
5H-3417  Gear 
5H-3470  Gear 
9H-5761  Gear As. 
9H-5775  Gear As. 
6I-9056  Gear 
6I-9078  Gear As 
6I-9080  Gear As. 
6I-9195  Gear 
6I-9205  Gear 
6I-9208  Gear 
6I-9544  Gear 
6I-9548  Gear 
6I-9763  Gear 
6I-9762  Gear 
6I-9765  Gear 
6I-9767  Gear 
3K-2345  Gear 
2M-3400  Gear As. 
4M-0503  Gear As. 
4M-0504  Gear As. 
7M-6595  Gear As. 
8M-1480  Gear 
8M-1481  Gear 
8M-2586  Gear As. 
8M-2592  Gear As. 
8M-6144  Gear As. 
8M-9563  Gear As. 
9M-1166  Gear As. 
9M-1721  Gear As. 
9M-1722  Gear As. 
9M-1723  Gear As. 
9M-2200  Gear As. 
9M-4356  Gear As. 
9M-4382  Gear As. 
9M-5452  Gear As. 
9M-8177  Gear As. 
9M-8178  Gear As. 
9M-8281  Gear As. 
9M-8282  Gear As. 
1P-0634  Gear As. 
1P-0980  Gear As. 
1P-0981  Gear As. 
1P-1989  Gear As. 
1P-1990  Gear As. 
1P-2186  Gear As. 
1P-4230  Gear As. 
1P-6746  Gear As. 
1P-8184  Gear As. 
1P-9654  Gear As. 
1P-9655  Gear As. 
2P-1966  Gear As. 
2P-5768  Gear As. 
2P-5774  Gear As. 
2P-9318  Gear As. 
2P-9319  Gear As. 
2P-9321  Gear As. 
2P-9332  Gear As. 
3P-0256  Gear As. 
3P-0258  Gear As. 
3P-0377  Gear As. 
3P-0877  Gear As. 
3P-0881  Gear As. 
3P-4575  Gear As. 
3P-4576  Gear As. 
3P-4629  Gear As. 
3P-4850  Gear As. 
3P-4851  Gear As. 
3P-7619  Gear As. 
3P-7620  Gear As. 
3P-7783  Gear As. 
3P-7784  Gear As. 
3P-7790  Gear As. 
3P-7791  Gear As. 
3P-7959  Gear As. 
3P-7960  Gear As. 
3P-8019  Gear As. 
3P-8881  Gear As. 
3P-8883  Gear As. 
6P-4965  Gear As. 
6P-4966  Gear As. 
6P-7357  Gear As. 
6P-8328  Gear As. 
8P-4547  Gear As. 
8P-4548  Gear As. 
8P-6848  Gear As. 
8P-6849  Gear As. 
8P-8165  Gear As. 
8P-8211  Gear As. 
8P-8212  Gear As. 
8P-9733  Gear As. 
9P-3463  Gear As. 
9P-4364  Gear As. 
9P-7473  Gear As. 
9P-7474  Gear As. 
1S-0088  Gear As. 
1S-3278  Gear As. 
2S-0151  Gear As. 
2S-0152  Gear As. 
2S-0167  Gear As. 
2S-0168  Gear As. 
2S-0691  Gear As. 
2S-3610  Gear As. 
2S-3611  Gear As. 
2S-5841  Gear As. 
2S-7918  Gear As. 
2S-7919  Gear As. 
2S-8574  Gear As. 
2S-8575  Gear As. 
3S-2613  Gear 
3S-2614  Gear 
3S-4380  Gear As. 
3S-4382  Gear As. 
3S-4383  Gear As. 
3S-4384  Gear As. 
3S-7254  Gear As. 
3S-8799  Gear 
4S-5978  Gear As. 
4S-6777  Gear As. 
4S-6778  Gear As. 
4S-8659  Gear As. 
4S-9000  Gear As. 
4S-9001  Gear As. 
5S-1598  Gear As. 
5S-1599  Gear As. 
5S-3682  Gear As. 
5S-3683  Gear As. 
5S-4383  Gear As. 
7S-2903  Gear As. 
7S-3882  Gear As. 
7S-4488  Gear As. 
7S-4579  Gear As. 
7S-6972  Gear As. 
7S-6973  Gear As. 
7S-7601  Gear As. 
7S-8596  Gear As. 
7S-8628  Gear As. 
7S-8657  Gear As. 
8S-0678  Gear As. 
8S-0679  Gear As. 
8S-3377  Gear As. 
8S-3442  Gear As. 
8S-3443  Gear As. 
8S-9163  Gear As. 
9S-4386  Gear As. 
9S-6586  Gear As. 
9S-6789  Gear As. 
9S-9385  Gear As. 
9S-9931  Gear As. 
3T-3699  Gear As. 
3T-3701  Gear As. 
3T-5672  Gear As. 
3T-5674  Gear As. 
3T-6989  Gear As. 
3T-6990  Gear As. 
3T-7880  Gear As. 
3T-7882  Gear As. 
3T-8085  Gear As. 
3T-8086  Gear As. 
3T-8093  Gear As. 
3T-8927  Gear As. 
3T-9904  Gear As. 
3T-9905  Gear As. 
6T-1540  Gear As. 
6T-1541  Gear As. 
6T-1542  Gear As. 
6T-3931  Gear As. 
6T-3932  Gear As. 
6T-4263  Gear As. 
6T-4264  Gear As. 
6T-4416  Gear As. 
6T-4417  Gear As. 
6T-4844  Gear As. 
7T-4330  Gear As. 
7T-5656  Gear As. 
7T-5657  Gear As. 
7T-6751  Gear As. 
7T-6752  Gear As. 
9W-3270  Gear As. 
9W-3713  Gear As. 
9W-9018  Gear As. 
6Y-0186  Gear As. 
6Y-0187  Gear As. 
6Y-4464  Gear As. 
6Y-4620  Gear As. 
109-6750  Gear 
113-1529  Gear 
116-4625  Gear As. 
116-4627  Gear 
112-2356  Gear As. 
112-2358  Gear As. 
132-2120  Gear As. 
132-9714  Gear As. 
137-8519  Gear 
145-3880  Gear As. 
184-5445  Gear As. 
206-8714  Gear As. 
206-8716  Gear As. 
209-9138  Gear 
211-5962  Gear As. 
211-5978  Gear As. 
234-0823  Gear As. 
234-0826  Gear As. 
243-0505  Gear As. 
243-0507  Gear As. 
243-0509  Gear 
250-2359  Gear As. 
250-2361  Gear As. 
276-3002  Gear As. 
276-3003  Gear As. 
293-7509  Gear As. 
306-4168  Gear As. 
306-4172  Gear As. 
306-4173  Gear As. 
306-4174  Gear As. 
323-6366  Gear As. 
323-6367  Gear As. 
325-3328  Gear 
325-7401  Gear 

Before installing the bearing, ream the bore to the correct size.

Table 6
Table D - Reamer Size Dimension 
Bearing Size  Reamer Size 
25.45 mm (1.002 inch)  25.35 mm (0.998 inch) 
34.95 mm (1.376 inch)  34.85 mm (1.372 inch) 
46.08 mm (1.814 inch)  45.98 mm (1.810 inch) 

When reaming through a hole, always enter the hole from the backside. When reaming a blind hole, use a small grinder to remove the burr at the top of the bore. If this procedure is not followed, the reamer will possibly catch on the burr and not follow the bearing bore diameter. A hole not reamed correctly will result in the part being scrapped.

The bearing must be installed with a bearing driver and arbor press.



Illustration 25g03357818

The bearing joint (V) must be 30 ± 15° from a center line, which passes through the bearing, bore mounting holes. Refer to Illustration 25.

The bearing must be recessed to dimension (Z), 1.57 mm (0.062 inch) below the surface. Refer to Illustration 25.

The surface texture (W) of the manifold or cover must be 1.6 µm (63.0 microinch) or smoother. Refer to Illustration 25.

The depth of stock removal is limited to the bearing bore depth (X) minus the total length of the bearing (Y) plus 1.57 mm (0.062 inch), dimension (Z).

EXAMPLE:

X - Y + Z = Minimum Stock Removal

This step will normally allow 1.57 mm (0.062 inch) material for clean-up on a first time repair.

Table 7
Table E - O-ring Groove Dimensions 
Item  Dimensions 
0.76 mm (0.03 inch) chamfer/radius 
4.11 ± 0.20 mm (0.162 ± 0.008 inch) 
2.84 ± 0.13 mm (0.112 ± 0.005 inch) 

The O-ring groove depth (U) must be 2.84 ± 0.13 mm (0.112 ± 0.005 inch) deep. After lapping or grinding the face, check the depth of the O-ring groove and machine again if depth (U) is less than 2.72 mm (0.107 inch).

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3512C and 3516C Engines Diagnostic Code List
3512C and 3516C Engines Event Code List
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