PRODUCT SUPPORT PROGRAM FOR UPDATING THE INTER AXLE DIFFERENTIAL LOCK HYDRAULIC CONTROL SYSTEM ON CERTAIN 735B, 740B, AND 740B EJECTOR ARTICULATED TRUCKS Caterpillar

PRODUCT SUPPORT PROGRAM FOR UPDATING THE INTER AXLE DIFFERENTIAL LOCK HYDRAULIC CONTROL SYSTEM ON CERTAIN 735B, 740B, AND 740B EJECTOR ARTICULATED TRUCKS

Usage:

TEBE2930-00

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02Apr2015

D120

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Containment - Before/After (Limited distribution)	PRODUCT SUPPORT PROGRAM FOR UPDATING THE INTER AXLE DIFFERENTIAL LOCK HYDRAULIC CONTROL SYSTEM ON CERTAIN 735B, 740B, AND 740B EJECTOR ARTICULATED TRUCKS
5077 1374 3004 3067		PS90468

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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 "PS90468" 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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TERMINATION DATE

30Apr2017

PROBLEM

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The hydraulic control system for the inter-axle differential (IAD) lock may generate high oil pressure spikes which may result in premature failure of the output transfer gear (OTG) oil filter, the oil filter base, accumulator, or the oil cooler on certain 735B, 740B, and 740B Ejector Articulated Trucks.

AFFECTED PRODUCT

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Model	Identification Number
740B	T4R01957, 1959-1961, 1963-1965, 1967-1969

PARTS NEEDED

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Qty	Part Number	Description
1	2M9780	SEAL-O-RING-STOR
7	3D2824	SEAL-O-RING-STOR
3	3J1907	SEAL-O-RING-STOR
2	3K0360	SEAL-O-RING
2	3S2093	STRAP-CABLE
1	5F7054	SEAL-O RING
2	6F6672	SEAL-O RING
2	6U0456	LASHING TIE 20
3	6V8397	SEAL-O-RING-ORFS
10	6V9746	SEAL-O-RING-ORFS
1	3447391	SENSOR GP-PRESS
1	3488094	CORE AS-OCLR
1	3587904	FILTER GP-O(BSC)
1	3605604	VALVE AS-CONTROL
1	3869746	VALVE GP-SOL&RLF
1	4479440	TUBE AS
1	4486323	HOSE AS
1	4560184	SFWR GP-A3001
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 7% 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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A new control system has been introduced to eliminate the cause of the oil pressure spikes. To install the new control system, refer to the Service Manual as necessary and carry out the rework procedure detailed in Special Instruction, REHS9444, "Procedure to Update the Inter Axle Differential Lock Hydraulic Control System On Certain 735B, 740B, and 740B Ejector Articulated Trucks".

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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%
0-5000 hrs, 0-30 mo	100.0%	100.0%	0.0%	0.0%	0.0%	0.0%