812638002 Mercury PLATE, Friction

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PSP FOR TURBOCHARGER TURBINE WHEEL ON 789 TRUCKS AND 3516 ENGINES (SPARE) - PS4278 - MAILED US AND CANADA, COFA, LIMITED CAC O, LIMITED COSA
  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-113 A-80.1 AU-77 O-71.1 1052 PS4278 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 "PS4278" as Part Number, "7755" as Group Number, and "96" as Description Code. Termination Date
May 31, 1990
Problem
The turbocharger turbine wheel may fail on some 789 Trucks operating at altitudes above 5000 ft.
Affected Product
Model Identification Number Group 1 - Before Or After Failure (7C1278 Or 7C2367 Turbocharger Group) 789 9ZC1-140, 147-149, 151-157, 161-163, 170, 177-179 3516 54Z170, 179, 190, 196 Affected Product previously repaired per the January 12, 1988 Service Letter - PS4171 should be consider under Group 2. Group 2 - Before Or After Failure (7C4718 Or 9Y1487 Turbocharger Group) 789 9ZC141-146, 150, 158-160, 164-169, 171-176, 180-236 3516 54Z206, 217, 233, 239, 240, 264
Parts Needed
Quantities shown are per turbocharger. There are four turbochargers on each product. Group 1 - Before Or After Failure - Per Turbocharger 1 - 9Y8266 Turbocharger Group 2 - 5P5700 Seal 1 - 7M7273 Gasket 1 - 0L1351 Bolt 1 - 5M2894 Washer 1 - 7W1944 Retainer 1 - 7N8875 Gasket 1 - 7N7559 Gasket 4 - 7N7628 Gasket Group 2 - After Failure - Per Turbocharger 1 - 9Y8266 Turbocharger Group 2 - 5P5700 Seal 1 - 7M7273 Gasket 1 - 7N8875 Gasket 1 - 7N7559 Gasket 4 - 7N7628 Gasket Group 2 - Before Failure - Per Turbocharger 2 - 5P5700 Seal 1 - 7M7273 Gasket 1 - 7N8875 Gasket 1 - 7N7559 Gasket 4 - 7N7628 Gasket 1 - 2F0808 Screw 1 - 1W4795 Nameplate 1 - 9Y8270 Housing - Turbine 1 - 9Y8268 Shaft & Wheel Assembly 4 - 9N2036 Plate 1 - 6N5004 Bearing 1 - 1P1120 Ring 1 - 7N3759 Ring 3 - 9M8915 Ring 1 - 9M8911 Collar 2 - 9M8919 Ring 1 - 9N2046 Spacer 1 - 9N2041 Bearing Kit
Action Required
Install applicable components listed under Parts Needed. If one turbocharger fails or is reworked prior to failure, update the other three turbochargers at the same time.
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 Group 1 - Before Or After Failure 0-2500 100% 1 0 1 0 0 0-24 mo 2501-4000 33 1/3% .5 0 .5 50% 1 25-36 mo Group 2 - After Failure 0-2500 100% 1 0 1 0 0 0-24 mo 2501-4000 33 1/3% .5 0 .5 50% 1 25-36 mo Group 2 - Before Failure 0-2500 100% 1.8 0 1.7 0 0 0-24 mo 2501-4000 33 1/3% .9 0 .9 50% 1.7 25-36 mo Labor hours shown are per turbocharger. There are four turbochargers per product. This is a 8 to 12 hour job to update all four turbochargers. When filing a claim for a spare engine use the following serial numbers as the vehicle serial number: