Product Support Program For Updating The Temperature Sensors, Pilot Line Routing And The Implement Valve Pilot Hose Assembly On Certain 980G Wheel Loaders And 824G, 825G And 826G Compactors Caterpillar

Product Support Program For Updating The Temperature Sensors, Pilot Line Routing And The Implement Valve Pilot Hose Assembly On Certain 980G Wheel Loaders And 824G, 825G And 826G Compactors

Usage:

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Caterpillar: Confidential Yellow

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.

NOTE: This Program can be administered either before or after a failure. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS4029" as the Part Number and "7755" as the Group Number. If administered before failure, use "56" as the Warranty Claim Description Code and use "T" as the SIMS Description Code. If administered after failure, use "96" as the Warranty Claim Description Code and use "Z" as the SIMS Description Code.

NOTE: This Revised Service Letter replaces the July 15, 1997 Service Letter. Changes have been made to the SMCS Code, Rework Procedure and Illustrations.

Termination Date

July 31, 1998

Problem

The temperature sensors, pilot line routing, and implement valve pilot hose assembly need to be updated on certain 98OG Wheel Loaders and 824G, 825G and 826G Compactors. The existing temperature sensors may indicate false over-temperature conditions. Under certain conditions, the current steering pilot line routing may lead to slight but noticeable lift arm drift as the steering wheel is turned (with the engine off). Also, the implement valve pilot tube assembly may need to be replaced due to inadequate durability.

Affected Product
Model & Identification Number

Group 1

980G (2KR1-480 (Replace engine coolant, hydraulic oil and torque converter oil sensors.) 2KR481-505 (Replace hydraulic oil and torque converter oil sensors.) 2SR1-329 9CM1-287 ), (05A11356, 11357, 11478, 11479)

824G (4SN315-345)

825G (6RN258-309)

826G (7LN144-262 )

Group 2

980G (2KR1-955 2SR1-361 9CM1-411 , 9CM413-501, 9CM503-504, 9CM506-511, 9CM513-539, 9CM541-550), (05A11356, 11357, 11478)

Group 3

980G (2KR1-1089), (05A11356, 11357, 11478, 11479)

Parts Needed

Group 1

3 - 1310427 Sensor Group (only two required on certain machines, as noted above).

Group 2

2 - 3J1907 Seal - O-ring

2 - 6V8397 Seal - O-ring

1 - 1388063 Tube Assembly

Group 3

2 - 6V8397 Seal - O-ring

1 - 8W6047 Hose Assembly

Action Required

See the attached Rework Procedure.

Service Claim Allowances

Parts Disposition

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

Attach.

(1-Rework Procedure)

Rework Procedure

Group 1

Replace the existing 1003055 Sensors (engine coolant, hydraulic oil and torque convertor oil) with new 1310427 Sensors.

Group 2

1. Relieve hydraulic system pressure per the 98OG Service Manual.

2. Replace 1230940 Tube Assembly with 1388063 Tube Assembly. Change the 9S4191 Plug. Refer to Illustration 2. Replace 6V8397 and 3J1907 Seals as necessary.

Group 3

1. Relieve hydraulic system pressure per the 98OG Service Manual.

2. Replace 1230930 Tube Assembly with 8W6047 Hose Assembly. Change the 9S4191 Plug. Refer to Illustration 1. Replace the 6V8397 Seals, as necessary.

Illustration 1