PRODUCT SUPPORT PROGRAM FOR REPLACING THE FINAL DRIVE PLANET SHAFTS ON CERTAIN 836G LANDFILL COMPACTORS Caterpillar

PRODUCT SUPPORT PROGRAM FOR REPLACING THE FINAL DRIVE PLANET SHAFTS ON CERTAIN 836G LANDFILL COMPACTORS

Usage:

SEBE9025

January 6, 2005
U-8
A-7
D-7
O-8

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*After failure only*	PRODUCT SUPPORT PROGRAM FOR REPLACING THE FINAL DRIVE PLANET SHAFTS ON CERTAIN 836G LANDFILL COMPACTORS
4050 4051		PS50881

NOTE: This Program can only be administered after a failure occurs. The decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS50881" as the Part number and "7755" as the Group Number. Use "96" as the Warranty Claim Description Code and use "Z" as the SIMS Description Code.

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

January 31, 2007

PROBLEM

The final drive planet shafts may need to be replaced on certain 836G Landfill Compactors. The 1920814 and 2235836 Planet Shafts may pit and spall under the roller bearings. If this occurs and they are not replaced the spalling will propagate contaminating the oil damaging other components.

AFFECTED PRODUCT

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Model	Identification Number
836G	7MZ1-Up
836G	BRL1-494

PARTS NEEDED

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Quantity	Part Number	Description
4	9H6832	SEAL-O RING
4	2R0098	SEAL-O RING
12	6T5545	DOWEL
12	2235836	SHAFT-PLANET
12	2394258	BEARING
24	2394259	WASHER - THRUST

ACTION REQUIRED

Monitor axle SOS as normal and watch for particles during normal axle oil changes. If SOS detects a significant increase in iron of 500 ppm or greater and/or particles are found during normal axle oil change inspect the final drive planet shaft for spalling. If spalling is found replace all twelve planet shafts on the machine. Note: Even if the planet shafts only spalled in one final drive group this program recommends and allows for rebuilding all four final drive groups. Reference RENR2183 - Disassembly and Assembly Manual.

1. Clean the axle arrangement components and inspect components for any permanent damage where a planet shaft spalling failure occurred. This includes cleaning all debris out of the axle housing itself. If a failure occurred on the front axle remove the service brake piston housing to remove any debris that may have collected behind it. Not removing debris will cause wear damage to the new sleeve bearings and other axle arrangement components.

2. Remove and discard the (12) 6T5545 dowels, (12) 1920814 or 2235836 planet shafts, (24) 5D3632 or 6Y9885 roller bearings, (12) 8K0067 spacers, and (24) 8X4552 thrust washers currently in the four final drives.

3. Clean and inspect the bores of the (12) 1920816 planetary gears. Replace any planetary gears with new gears if the bore has pitting, spalling, or deep scratches.

4. Assemble the final drives using the new components provided. Assemble the finals in a clean work area. Clean the parts and lubricate the parts using clean power train oil before assembling. Dip the sleeve bearings in clean oil or completely coat the surfaces to ensure the bearings don't rotate dry against the planetary gear bores or the planet shafts.

SERVICE CLAIM ALLOWANCES

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Product/ Part smu/age whichever comes first	Caterpillar		Dealer Suggested		Customer Suggested
Product/ Part smu/age whichever comes first	Parts	Labor Hrs	Parts	Labor Hrs	Parts	Labor Hrs
0-6000 Hours 0-24 Months	100%	46	0	0	0	0
6001-10000 Hours 25-36 Months	33.3 %	23	0	0	50%	23
NOTE: This is a 46-hour job.
NOTE: If there has been a previous repair, part age will apply. Retain documentation of the previous repair in the dealer's records for audit purposes, and specify repair date and machine hours in the "Additional Comments" section of the warranty claim.