LINK AS-TRACK 2131971 - Caterpillar

Caterpillar: Confidential Yellow
PSP FOR INSTALLING A NEW HOSE IN THE AIR LINES GROUP OF CERTAIN 3116 TA GENERATOR SET ENGINES - PS4409 - MAILED US AND CAC O, CFEL, COSA, LIMITED COFA
  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-11 A-8 AU-6.1 E-5 O-9 1058, 1087 PS4409 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 "PS4409" as Part Number, "7755" as Group Number, and "96" as Description Code. 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
January 31, 1991
Problem
The 7C6214 Hose used in the air lines group of certain 3116 TA Generator Set Engines may not have been made of the correct material. 3116 T Generator Set Engines are not affected.
Affected Product
Model Identification Number 3116 TA 2SG291, 293, 295, 300, 304, 308, 311-319, 322, 326, 327, 330, 333, 334, 336, 338, 340, 343, 345, 347, 349-358, 362, 363, 366-368, 372, 374, 376, 378, 380, 382, 384, 386, 388, 390, 391, 394, 396, 398, 400, 402, 404, 406, 408, 409, 411, 414, 416, 418, 419, 421, 423, 426, 427, 429, 431, 434, 435, 437,