Rear Propel Motor Shafts Need To Be Replaced On Certain CB-525 Vibratory Compactors And Albaret Built CB-525 Vibratory Compactors Caterpillar

NOTE: The information supplied in this service letter may not be valid after the termination date of this program. Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst.

NOTE: This Program must be administered as soon as possible. When reporting the repair, use "PI3550" as the Part Number, "7751" as the Group Number, "56" as the Warranty Claim Description Code and "T" as the SIMS Description Code. Exception: If the repair is done after failure, use "PI3550" as the Part Number, "7751" as the Group Number, "96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.

Completion Date

Termination Date

Problem

The rear propel motor shafts may fail on certain CB-525 Vibratory Compactors and Albaret built CB-525 Vibratory Compactors. New 832006 Shafts need to be installed in the rear propel motors.

Affected Product
Model & Identification Number

CB-525 (6XD1-132)

CB-525 (Albaret Built) 834B71606, 71607, 73401, 73403, 73404, 73406

Parts Needed

Dealers will need to order parts for this Program.

2 - 826739 Bearing

2 - 827462 Seal Kit

2 - 832006 Shaft

Action Required

See the attached procedure.

Owner Notification

Not Applicable

Service Claim Allowances

NOTE: This is a 16-hour job.

NOTE: When filing a claim for an Albaret built CB-525 Vibratory Compactor, use "99Z_____" as the Product Identification Number. Enter the complete Albaret Identification Number "834B _ _ _ _ _" in the Related S/N Field.

Parts Disposition

Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.

NOTE: MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE.

Attach.

(1-Rework Procedure)

Rework Procedure

NOTE: It is recommended to perform this rework in the shop, as lifting equipment is required.

1. Remove the two external rear wheels. Disconnect the two high pressure hydraulic hoses, parking brake hose, housing drain hose, and the speed hose.

NOTE: All hoses and the motor ports must be plugged to prevent contamination.

2. Remove twelve bolts (39) and rim flange (37). See Illustration 1.

Illustration 1. Removing motor from machine.

3. Remove the nine bolts (32) holding the motor on the rear chassis. Remove the hydraulic motor.

4. Place the motor on a flat horizontal surface so that the shaft is vertical.

5. Remove bolts (82). Remove housing cover (71) and shaft assembly (94).

Illustration 2. Location of parts.

6. Remove Circlips (77), spacer (76) and shim (75).

7. With a press, separate the shaft (94) from bearing (74) being careful not to damage the bearing. The bearing must be reused.

8. Disassemble bolts (93), cover (91), and seal (72).

9. Install new seal (72) in cover (91). Install the cover on the housing cover using bolts (93). Tighten bolts to 9.5 N·m.

10. Install new seal (78) on new shaft (94) using EP1 Lithium grease.

11. Heat new bearing (73) to 80°C in an oil bath and install on new shaft. Fill new bearing completely with EP1 Lithium grease.

12. Install the shaft into housing cover (71) through the brakes discs taking care not to damage seal (72). To aid in installation, release the brake using air pressure at the brake port.

13. Heat the inner race of bearing (74) to 80°C in an oil bath and install on shaft (94). Install spacer (76), shim (75), and Circlips (77).

14. Add shims according to the following procedure:

a. Make sure there is no play in bearing (74).

b. WIth spacer (76) and Circlips (77) in place, measure the distance between spacer (76) and the inner race of bearing (74).

c. Add shim thickness equal to the value of the measured gap minus 0.1 to 0.25 mm.

15. Install the housing cover assembly on the motor with bolts (82). Tighten to 33 N·m.

16. Install the motor on the rear chassis of the machine with bolts (32). Tighten to 38 N·m. See Illustration 1.

17. Connect hoses and fill the hydraulic tank with recommended hydraulic oil.

18. Connect a high pressure filter in series on one of the two high pressure hoses. Start the engine and rotate the motor alternately in forward and reverse for ten minutes to clean the system. (Recommend using 828903 High Pressure Filtration Kit.) See Illustration 3.

Illustration 3. Installation of high pressure filter.

NOTE: This filtration must be done for both of the motors individually, one after the other. During the filtering operation for one motor, the opposite motor must not rotate. Disconnect the motor not being filtered and plug the brake hose.

19. Remove the high pressure filter.

20. Install the rim flange (37) with bolts (39). Tighten to 20 N·m.

21. Install the external wheels.

22. Check the hydraulic level and add to recommended level, if necessary. Test machine.