PRODUCT SUPPORT PROGRAM FOR INSPECTING WHEEL BEARINGS ON CERTAIN 14M MOTOR GRADERS Caterpillar

PRODUCT SUPPORT PROGRAM FOR INSPECTING WHEEL BEARINGS ON CERTAIN 14M MOTOR GRADERS

Usage:

TEBE4533-01

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23May2016

(Revised 14Jun2016)

M620

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Containment - Before/After (Limited distribution)	PRODUCT SUPPORT PROGRAM FOR INSPECTING WHEEL BEARINGS ON CERTAIN 14M MOTOR GRADERS
4201 4006 4208		PS90599

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NOTE:

Caterpillar’s obligations under this Service Letter are subject to, and shall not apply in contravention of, the laws, rules, regulations, directives, ordinances, orders, or statutes of the United States, or of any other applicable jurisdiction, without recourse or liability with respect to Caterpillar.

NOTE:

This Containment Program can be administered either before or after a failure occurs. In either case the decision whether to apply the Program is made by the dealer and service rep. Obtain the service reps Goodwill Approver Code before completing the repair. EAME dealers should use their standard Industry Group specific goodwill approval codes. The Goodwill Approver Code must be included when submitting the claim.

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NOTE:	When reporting the repair, use "PS90599" as the Part Number and "7777" as the Group Number. If administered before failure, use "56" as Warranty Claim Description and "T" as the SIMS Description Code. If administered after failure, use "96" as 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.

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NOTE:	This Revised Service Letter replaces the 23May2016 Service Letter. Changes have been made to Parts Needed, Action Required, and Rework Procedure.

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TERMINATION DATE

31May2017

PROBLEM

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The existing wheel bearings can fail on certain 14M Motor Graders. If the existing wheel bearings fail, they can generate debris, causing seal leakage, contamination, and resultant damage.

AFFECTED PRODUCT

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Model	Identification Number
14M	B9J00401, 404, 582-584, 588-591, 627, 648, 720, 728-730, 789-790, 815, 905, 919, 922, 950, 963, 970, 1012-1013, 1036-1039, 1041 R9J01147, 1150-1153, 1171, 1228-1237, 1305, 1309, 1342-1347, 1350-1352, 1354, 1356, 1483, 1485

PARTS NEEDED

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Qty	Part Number	Description
3	1U9891	ADDITIVE-OIL (After Failure Only)
4	2G9793	GASKET
4	4B7270	CONE-BEARING
4	5K5288	SEAL GP-DUO CONE
4	5P3490	CONE-RLR BEARING
8	6B3223	CUP-BEARING
4	6G1670	CHAIN GP (After Failure Only)
2	6V8397	SEAL-O-RING-ORFS
4	6V8398	SEAL-O-RING-ORFS
4	7X1548	SEAL-O RING
4	9D1586	SPACER (After Failure Only)
16	1036169	BOLT-HEX HEAD
4	2204335	SEAL-BRAKE (After Failure Only)
4	2204336	SEAL-BRAKE (After Failure Only)
4	2528678	SPROCKET (After Failure Only)
8	2669727	GASKET
16	2706942	SHIM
4	2706943	SHIM
16	2706944	SHIM
36	3510925	DISC-FRICTION (After Failure Only)
8	3800473	PIN-COTTER
1	OIL	TANDEM OIL-BULK[200L(26.4gal)](After Failure Only)
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 32% of dealership population. This is an initial order recommendation only, and the ultimate responsibility for ordering the total number of parts needed to satisfy the program lies with the dealer.

ACTION REQUIRED

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Wheel bearings should be replaced and preload reset. A new wheel bearing preload procedure, with improved preload setting, and improved assembly process, is now available. Refer to RENR8639, Disassembly and Assembly, for the new rework procedure. Disassemble the wheel group so that both bearings can be replaced. If degradation of the bearings is noted, inspect wheel group components for contamination and damage (friction discs, brake housing, and spindle). Inspect the spindle for signs of stepping where it contacts the bearings. Refer to SEBF9385, Thermal Spray Procedures for Motor Grader Spindle, Table 8 for specifications. Inspect the sprockets for any signs of cracking in the root of the tooth, excessive wear on the contact surface between the sprocket and inner wheel bearing, and any chipping on the teeth of the sprocket. Refer to the attached Rework Procedure for additional information on inspection sprocket surfaces for wear. Rework or replace components as needed. Flush and clean the tandem housing to remove any residual contaminants. Note: it is usual for material to build-up in the bottom of the tandem housing. The presence of material in the bottom of the housing alone does not indicate a failure has occurred. Refer to the Service Manual if/as necessary.

Inspect the tandem chains while they are removed from the unit. Look for excessive play in the rollers, loose engagement of the press fit pins, or severe gouging or material loss on the out links from abrasive wear with the tandem housing or adjacent chain. Note, the presence of a wheel bearing failure alone does not necessitate replacement of the tandem chains. Replace the chains only if visual defects are noted.

Note: add 1.5L of the 1U-9891 oil additive to each tandem if the brake friction material is replaced, tandems flushed, and new oil used.

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SERVICE CLAIM ALLOWANCES

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Product smu/age whichever comes first	Caterpillar		Dealer Suggested		Customer Suggested
Product smu/age whichever comes first	Parts %	Labor Hrs%	Parts %	Labor Hrs%	Parts %	Labor Hrs%
0-4000 hrs, 0-24 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%
4001-6000 hrs, 25-36 mo	60.0%	70.0%	0.0%	0.0%	30.0%	30.0%
6001-8000 hrs, 37-48 mo	33.0%	50.0%	0.0%	0.0%	50.0%	50.0%
8001-10000 hrs, 49-60 mo	20.0%	20.0%	0.0%	0.0%	60.0%	80.0%

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NOTE: This is a 34.0-hour job If there has been a previous repair, part age/hours will apply. Retain a copy of the previous repair invoice in the dealer's records for audit purposes, and specify repair date and machine hours in the "Additional Comments" section of the warranty claim.
Note: An allowance for machine transportation may be claimed not to exceed $1000 per machine.

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PARTS DISPOSITION

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

Rework Procedure

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Check the Wear on the Sprocket to the Bearing and Retainer:

1. Check the wear on the sprocket(refer to Image 1.1.1). If the wear is less than 0.025 mm (0.001 inch), then the parts are OK to use.

2. Replace wheel bearings and races, and reset the preload.

3. If the wear on the sprocket is greater than 0.025 mm (0.001 inch), then replace the bearings and races, and reset the preload only if the measured gap is greater than 0.050 mm (0.002 inch).

Image1.1.1

Check the Wear on the Sprocket to Retainer interface:

1. Check for fretting that is due to spline backlash (refer to Image 1.2.1).

If the wear is excessive, then flip the retainer over, polish the face of the sprocket and replace the bearings and races, and reset the bearing preload.

Note: If the bearing preload cannot be set, then replace the worn parts.