PRODUCT SUPPORT PROGRAM FOR REPLACING CRACKED FINAL DRIVE HOUSINGS ON CERTAIN 120H MOTOR GRADERS
Usage:
SEBE9062
February 11, 2005
D-37
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| After failure only |
PRODUCT SUPPORT PROGRAM FOR REPLACING CRACKED FINAL DRIVE HOUSINGS ON CERTAIN 120H MOTOR GRADERS |
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| 3259 4050 |
PS50939
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NOTE: Although this program must be administered as described above, after a failure of one housing both of the housings must be replaced at the same time.
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.
TERMINATION DATE
February 28, 2007PROBLEM
The 8X3222 Cast Final Drive Housings may crack on certain 120H (2AN) Motor Graders. The housings crack at the corner gussets of the mounting flanges.AFFECTED PRODUCT
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| Model | Identification Number |
| 120H |
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PARTS NEEDED
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| 8 | 4D3704 | WASHER-HARD |
| 2 | 4D6695 | SEAL-O RING |
| 44 | 3E4307 | BOLT-LOCKING |
| 32 | 8S9092 | BOLT |
| 2 | 6V8082 | SEAL-LIP TYP |
| 2 | 2444072 | HOUSING |
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ACTION REQUIRED
See the attached procedure.SERVICE CLAIM ALLOWANCES
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PARTS DISPOSITION
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.Attach. (1-Rework Procedure)
REWORK PROCEDURE
Remove tandem, final drive retainer plate, and the 8X3222 Housing.
Drill and tap four additional holes for 5/8-11-2B threads in the tandem drive housing as per the following illustration. The new housing may be used to locate the new bolt holes.
Remove the pipe plug from the vent hole in the old housing so it can be installed in the new housing. (Do not install it in the vent hole of the new housing until after the final drive is assembled.)
Install a new lip seal and o-ring seal in the new housing.
Install the final drive retainer plate using new 8S-9092 Bolts. Tighten the bolts to a torque of 270 +/- 15 Nm.
Install the tandem drive housing using 22 new
3E4307 Bolts and 4 additional 4D3704 Washers. Tighten the bolts to a torque
of 240 +/- 40 Nm.
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