Product Support Program For Replacing The Pulse Deflector In Certain Challenger 65 Tractors, 235C Excavators, 621S Scrapers, And 637E Scrapers
Usage:
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*Use as required.
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 "PS4615" as Part Number, "7755" as Group Number, and "96" as 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.
Termination Date
July 31, 1992Problem
The pulse deflectors on certain Challenger 65 Tractors, 235 Excavators, 621S Scrapers, and 637E Scrapers may fail and cause the fuel injection nozzles to become plugged.
Affected Product
Model & Identification Number
CH 65 (7YC1-1967,7YC1969,7YC1970)
235C (5AF1-1438,5AF1440,5AF1443,5AF1450;2PG1-733;3WG1-270;4DG1-658)
621S (8KD1-659
637E (1FB1-514,1JB471-724)
Parts Needed
- 1 - 7N9554 Gasket
- 1 - 8N5784 Deflector (chg 5)
- * - 8N7005 Nozzle
- * - 7W5929 Plunger & Barrel Assembly (after failure only)
- 1 - 8N5784 Deflector (chg 5)
*Use as required.
Action Required
Parts Stock
Remove all 8N5784 Deflectors from parts stock that have a change level of 4 or earlier.
Affected Product Before Failure
Remove the fuel pump side cover. Replace the existing 8N5784 pulse deflector with a new pulse deflector of the same part number that was made to change level 5.
After Failure
Remove the fuel pump side cover. Replace the failed 8N5784 pulse deflector with a new pulse deflector of the same part number that was made to change level 5. Flush the housing with clean fuel before installing the side cover.
Remove fuel injection nozzles and check for the proper spray pattern and VOP. If the fuel injection nozzles are damaged, replace as necessary.
Service Claim Allowances
Parts Stock
Submit one claim for all 8N5784 Deflectors (change level 4) removed from parts stock.
Affected Product
NOTE: This is a 3-hour job.
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Caterpillar Information System:
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