Usage:
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 "PS4738" 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: Although this Program is to be administered as described above on the Affected Product, parts should be removed from parts stock as soon as possible.
NOTE: This Revised Service Letter replaces the August 4, 1992 (Revised March 1993) Service Letter. Changes have been made to the Affected Product.
Termination Date
August 31, 1993Problem
The existing 2W6172 Fan Spider (Blower) or 2W6173 Fan Spider (Suction) may fail on certain D3C Tractors, D4C Tractors, 931C Track Loaders, and 935C Track Loaders.
Affected Product
Model & Identification Number
D3C (3RF441-Up; 6PF215-Up; 8BF168-Up; 5KG822-Up; 5ZG1-47; 7JG1-75; 8DG1-66; 4HJ1-440; 1PJ371-Up; 5CJ1-550)
D4C (7KG1-466; 9BG1-196; 1RJ648-Up; 2CJ230-Up)
931C (6RF73-Up; 7HF74-Up; 8AF1-Up; 5LG1-Up; 9AG1-34; 2BJ171-Up; 6AJ1-86; 2AK1-61)
935C (5DJ1-107; 8CF1-Up)
Parts Needed
Action Required
Parts Stock
Remove all of the existing 2W6172 Fan Spider (Blower) and 2W6173 Fan Spider (Suction) from parts stock.
Affected Product
Remove the existing fan spider assembly and install a new 6I1363 Spider Assembly (Blower-Type Fan) or a 6I1364 Spider Assembly (Suction-Type Fan).
Service Claim Allowances
Parts Stock
Submit one claim for all 2W6172 Fan Spiders (Blower) and 2W6173 Fan Spiders (Suction) removed from parts stock.
Parts Disposition
Parts Stock And Affected Product
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.