0312613 JOHNSON PLATE, Impeller housing

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PSP FOR REPLACING LEAKING EXHAUST GAS INLET HOUSINGS ON CERTAIN 3606, 3608, 3612, AND 3616 ENGINES - PS0457 - MAILED US AND CANADA, CACO, COFA, BRAZIL, LIMITED COSA, LIMITED CFEL
  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-261 A-181 AU-163 B-49 O-201.1 1052, 1065 PS0457 This Program can only be administered after a failure occurs. The decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS0457" 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, turbochargers in customer and dealer parts stock should be reworked as soon as possible. Termination Date
December 31, 1991
Problem
Early versions of both the one and the two piece gas inlet housings for the turbochargers used on certain 3606, 3608, 3612, and 3616 Engines may leak in various locations. New 24 bolt two piece gas inlet housings can be installed to provide better sealing.
Affected Product
Model Identification Number 3606 8RB1-400 2S18451 3608 6MC1-292 3612 9RC13-81 2S18175 3616 1PD18-42
Parts Needed
1 - 4P0308 Housing (3606 Only) 2 - 4P0308 Housing (3612 Only) 1 - 4P0309 Housing (3608 Only) 2 - 4P0309 Housing (3616 Only)
Action Required
***** Parts Stock ***** Replace the exhaust gas inlet housing on all 7C5125, 7C5846, 7C5847, 7C5848, 7C6148, 4W8685, and 9Y7032 Turbochargers in customer and/or dealer parts stock. ***** Affected Product ***** If the earlier exhaust gas inlet housing is cracked or leaking, replace the housing with a 4P0308 Housing (3606 and 3612) or a 4P0309 Housing (3608 and 3616). Record the serial number of the engine and turbocharger and report this information to Service Engineering. On 3612 and 3616 Engines equipped with two turbochargers; if one earlier exhaust gas inlet housing is cracked or leaking, repair both turbochargers by installing the appropriate housings.
Service Claim Allowances
***** Parts Stock ***** Submit one claim for all 7C5125, 7C5846, 7C5847, 7C5848, 7C6148, 4W8685, and 9Y7032 Turbochargers in parts stock that were reworked. This is a 3-hour job to rework each turbocharger in parts stock. ***** Affected Product ***** Product Caterpillar Dealer Suggested Customer Suggested smu Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs. 0-10000 100% 6 0 0 0 0 10001-15000 100% 0 0 0 0 6 This is a 6-hour job per turbocharger. The turbocharger serial number(s) must be included with each claim story.
Parts Disposition
All parts removed (with the exception of cores used for Caterpillar Remanufactured parts) should be rendered useless and scrapped immediately upon completion of the repair.