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Caterpillar: Confidential Yellow
PSP FOR FUEL INJECTION LINE FAILURES ON 627E, 627E PP AND 637E SCRAPERS - MAILED WORLDWIDE EXCEPT BRAZIL
  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.
U-35 A-20 AU-22 E-18 O-21 1252 PS4200 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 "PS4200" as Part Number and "7755" as Group Number. Termination Date
February 28, 1989
Problem
The fuel injection lines on 627E, 627E PP and 637E Scrapers may crack as a result of excessive vibration. New fuel injection lines and supporting brackets can be installed.
Affected Product
Model Identification Number 627E 6EBl - 513 627E PP 6GB513 - 177, 579-582, 584, 585, 587, 588, 590-603 637E 1FB1 - 338, 341-348, 350-352 1JB1 - 548, 550, 553, 555, 556, 558-561, 563
Parts Needed
1 - 7C9564 Line As. 1 - 7C9565 Line As. 1 - 7C9566 Line As. 11 - 1W9168 Clamp 8 - 5P4939 Screw As. 11 - lW9169 Clamp 1 - 9Y1586 Bracket As. 1 - 9Y1653 Bracket As. 3 - 9N3388 Screw 1 - 9Y2681 Bar (as needed) The 9Y2681 Bar is only needed if the engine is not equipped with heat shields.
Action Required
Install the new parts as shown in the attached illustration. It is important that the 1W9168 and 1W9169 Clamps be installed at the locations shown in the illustration.
Service Claim Allowances
Product Caterpillar Dealer Suggested Customer Suggested smu/age Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs. whichever (D/N) (Cost) (C/L) (Sell) comes first 0-2500