GEAR-DIFFERENTIAL BEVEL 8W9149 - Caterpillar

This Program must be administered as soon as possible. When reporting the repair, use "PI3327" 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 "PI3327" 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
March 31, 2000Termination Date
September 30, 2000Problem
The coupling hub needs to be repositioned on certain 906 Compact Wheel Loaders. The 1410666 Coupling Hub (part of the 1382258 Pump Mounting Group) requires repositioning on the hystat pump shaft. Failure to perform this rework will result in complete loss of hydraulic power to the machine. This occurs due to the 1410666 Hub loosening and moving on the shaft which results in disengagement of the hub from the flange.
Affected Product
Model & Identification Number
906 (6ZS715-759, 6ZS762-765, 6ZS777, 6ZS780, 6ZS784, 6ZS785, 6ZS787, 6ZS790, 6ZS791, 6ZS794, 6ZS796)
Parts Needed
Dealers will NOT need to order parts for this Program.
Action Required
See the attached procedure.
Owner Notification
U.S. and Canadian owners will receive the attached Owner Notification.
Service Claim Allowances
This is a 1-hour job.
U.S. and Canadian Dealers Only - Eligible dealers may enter a Type 2 SIMS Report.
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE.
Attach.(1-Owner Notification)(2-Rework Procedure)Copy Of Owner Notification For U.S. And Canadian Owners
Rework Procedure
1. Open the disconnect switch or disconnect the ground cable from the battery.2. Remove 1453232 Bottom Guard Group by removing the four 8T4136 Bolts using a 16 mm socket and a breaker bar.3. Remove hystat pump from the engine support by removing the two 8T7338 bolts using a 24 mm socket and breaker bar. Be sure to adequately support the hystat pump in a manner that allows disengagement of the pump from the flange and engine support.4. Reposition the 1410666 Hub to 8.6 1 mm (0.338 0.04 inch) (see Illustration 1) and tighten the hub setscrew to 55 5 N m (40 4 lb ft) using an 8 mm hex bit and an appropriate sized torque wrench.5. Reinstall the hystat pump. Tighten the 8T7338 Bolts to 240 40 N m (175 29 lb ft) using a 24 mm socket and an appropriate sized torque wrench.6. Reinstall the bottom guard. Tighten the four 8T4136 Bolts to 55 10 N m (40 7 lb ft) using a 16 mm socket and an appropriate sized torque wrench.7. Ensure all support material has been removed from the engine compartment.8. Close the disconnect switch or reconnect the ground cable to the batter.9. Test machine for proper function. Tools Required:
8 mm hex bit16 mm socket24 mm socketbreaker bar (drive size to match sockets)0-250 N m torque wrench (drive size to match sockets)blocking material (used as supports for engine and hystat pump)
View showing Hub and Pump assembledIllustration 1.