ALTERNATOR GP -B 20R3603 - Caterpillar

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 "PS4664" 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.
This Revised Service Letter replaces the January 7, 1999 Service Letter. Changes have been made to the Affected Product and SMCS Code.
Termination Date
January 31, 2001Problem
The non-metallic cam on the shaft in the differential steering control handle of certain D6R, D6R DS XR, D6R LGP, D6R XR, D6R XL, D7R, D7R DS, and D7R DS LGP Tractors may prematurely wear. This wear can causing loss of calibration of the the forward/neutral/reverse position sensor. The narrow width of the spring loaded rollers that press against the detent cam can cause high contact stresses, reulting in cam crushing and excessive wear.
Affected Product
Model & Identification
D6R (4FM417-496, 3ZN417-620, 5LN417-1453, 5PR417-437, 7GR417-518, 1RW417-425)
D6R DS XR (7DR417-435)
D6R LGP (8TM417-641, 9PN417-928)
D6R XR (7KN417-437, 9MN417-441)
D6R XL (9BM417-693, 5RR417-474)
D6R DS LGP (4TR417-573)
D7R (2EN342-708, 3DN218-304, 5KZ1-15)
D7R DS (5MR342-391)
D7R DS LGP (6ER218-239)
Parts Needed
1 - 1H3340 Bolt2 - 6V1232 Screw-Button2 - 9W1464 Screw1 - 1515803 Shaft As2 - 1582734 Spring1 - 1582735 BaseAction Required
See the attached procedure.
Service Claim Allowances
This is a 3-hour job.
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Attach.(1-Rework Procedure)Rework Procedure
1. Refer to SENR9459, Disassembly & Assembly, D6R and D7R Track-Type Tractor Differential Steering Electronic Tiller for removal of tiller from machine.2. Remove and discard 1073922 Shaft ( OR 151-5803 on later machines) (2) 2N3680 Screw, (1) 4B2047 Nut, (1) 6V1051 Screw-Button Head, and (1) 111-8951 Spring.3. Install new 151-5803 Shaft Assembly.4. See Illustration "A" for installation instructions for new detent springs.5. Reinstall tiller handle on machine.6. Reference SENR8367 Service Manual, Power Train Electronic Control System for Track Type Tractors.A) Using the 4C8195 Service Tool, enter Transmission Calibration Mode (mode 6) and then submode 22 - Transmission Direction Position Sensor Calibration.B) Follow the instructions to recalibrate and clear faults.