PRODUCT SUPPORT PROGRAM FOR REWORKING THE FRONT SUSPENSION CYLINDERS ON CERTAIN 775G OFF-HIGHWAY TRUCKS Caterpillar

PRODUCT SUPPORT PROGRAM FOR REWORKING THE FRONT SUSPENSION CYLINDERS ON CERTAIN 775G OFF-HIGHWAY TRUCKS

Usage:

TEBE2559-00

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23Jan2015

Q630
X260

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Containment - Before/After (Limited distribution)	PRODUCT SUPPORT PROGRAM FOR REWORKING THE FRONT SUSPENSION CYLINDERS ON CERTAIN 775G OFF-HIGHWAY TRUCKS
7201 7750		PS90451

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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 "PS90451" as the Part Number and "777R" 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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TERMINATION DATE

31Jul2015

PROBLEM

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The existing front suspension cylinder can fail when the suspension rod makes contact with the suspension housing on certain 773G and 775G Off-Highway Trucks. If the suspension rod makes contact with the suspension housing, it will result in delamination of the HVOF coating of the rod causing the suspension cylinder to leak and collapse.

AFFECTED PRODUCT

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Model	Identification Number
775G	RFM00353-00357, 390-391

PARTS NEEDED

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Qty	Part Number	Description
2	1H8278	SEAL-O-RING
4	1K6853	FITTING-RELIEF
1	1U9891	ADDITIVE-OIL
2	2H5001	SEAL-O RING
2	3B8489	ADAPTER-STR
2	3J1907	SEAL-O-RING-STOR
2	5J6444	RING-BACKUP
2	5J9451	BEARING
2	5M6214	PLUG-NPTF
10	6C3214	BOLT
2	7D2878	SHIM
1	7X7664	GREASE-MP
4	8T1127	RING-WEAR
2	8T7692	RING-WEAR
2	8T7695	RING-WEAR
2	9X7333	SEAL-LIP TYPE
2	2234720	PLATE-STRUTS
4	2792269	FILM-WARN
4	2792271	PLATE-WARN
4	4335903	SEAL-U-CUP
2	4394503	RING-BACK UP
2	4398659	HOUSING AS-PED
1	BULK_OIL	REQUIRES 12.8L (3.38 US GAL) CAT TDTO SAE 10W OIL
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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****Parts Stock ****
Replace the 334-4222 Suspension Housing used in the 334-4225
Suspension Group with a 451-9205 Suspension Housing Assembly.

****Affected Product****
When one suspension cylinder fails on the machine, rework both
suspension cylinders. Replace the 334-4222 Suspension Housing used in
the 334-4225 Suspension Group with a 451-9205 Suspension Housing
Assembly.

The 451-9205 Suspension Housing Assembly has added an additional 384-
4374 Back Up Ring and 8T-1127 Wear Ring to improve the performance of
the suspension group.

If the 271-7477 Rod is found to have failed because of rod to housing
contact, attach a picture of the failed 271-7477 Rod into the SIMSi
before making a claim. If the rod cannot be salvaged, replace it with a
0R-3691 remanufactured rod.

If the 271-7477 Rod is found to be defect free, replace the 334-4222
Suspension Housing with a 451-9205 Suspension Housing Assembly and
reuse the 271-7477 Rod.

Reuse and install the components from the existing 334-4222 Suspension
Housing that are not provided in the parts list into the new 451-9205
Suspension Housing Assembly. Install the new components provided in the
parts list into the new 451-9205 Suspension Housing Assembly in order to complete the rework.

If reworking the 441-5252 Front Strut Housing with a 451-9205 Housing
use the 384-4371 U-Cup Seal and the 384-4374 Back Up Ring. Refer to
Image2.

The 433-5903 U-Cup Seal opening needs to face the pressure cavity of
the front suspension group and the 384-4374 Backup Ring needs to be
installed on the grease cavity side of the backup ring. Refer to
Image2.

Install all required warning films on the 451-9205 Suspension Housing
Assembly. Refer to Image 1.

Record the serial number for each 451-9205 Suspension Housing into
SIMSi and enter them into the claim comments.
Refer to Image3.

For the Rework Procedure, refer to KENR9969, Disassembly and Assembly, "Tire and Rim (Front) - Remove and Install", "Front Suspension (Cylinder) - Remove and Install", and "Spindle (Front) - Remove and Install".

Refer to REHS4445, Special Instruction, "Servicing the Suspension Cylinders for Off-Highway Trucks", for the charging procedure for the front suspension groups.

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Image1

Image2

Image3

Image4

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%
0-800 hrs, 0-6 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%