850453 Mercruiser CAMSHAFT

08Jun2015
U-292
A-201
D-237
O-241
Before/After
PRODUCT SUPPORT PROGRAM FOR REPLACING THE TURBOCHARGER V-BAND CLAMPS ON CERTAIN 789D OFF-HIGHWAY TRUCKS EQUIPPED WITH 2100 HORSEPOWER ENGINES
1053 1052 PS44764
Caterpillar’s obligations under this Service Letter are subject to, and shall not apply in contravention of, the laws, rules, regulations, directives, ordinances, orders, or statutes of the United States, or of any other applicable jurisdiction, without recourse or liability with respect to Caterpillar.
This Program must be administered either before or after failure.In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS44764" as the Part Numberand "7755" as the Group Number. If administered before failure, use "56" as the Warranty Claim Description Code and "T" as the SIMS Description code.If administered after failure, use "96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.
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.
TERMINATION DATE
30Jun2017
PROBLEM
Older 352-6378 and 20R-2919 Turbochargers have an interference condition at the cartridge to compressor housing joint that can reduce the service life of the clamp and/or the turbocharger.
Clamp failures are most common between 4000 and 7000 service hours on the clamp.
This interference condition exists on 352-6378 and 20R-2919 turbochargers with serial numbers of RIM41565 and older.
Turbochargers with serial numbers of RIM41566 and newer do not have this interference condition.
AFFECTED PRODUCT
Model Identification Number
789D SPD00166-00168, 170-175, 185-187, 189-190, 193, 197-202, 204, 206-207, 220, 224-227, 231, 236-237, 239, 241, 243, 246-250, 253, 255, 262-268, 270-273, 276-277, 280-281, 293-298, 308-318, 320-321, 328-330, 335, 337-339, 344-347, 349-350, 352, 354-355, 357-363, 365-366, 368, 370, 372, 374, 376, 378, 380, 382, 385, 388-390, 392-394, 396-399, 401-403, 405-407, 409-418, 420-423, 425-431, 433, 435-439, 441-443, 445-446, 448-449, 451-455, 457, 459, 462-463, 465-475, 477-486, 500-501, 509-510, 513-524, 528-529, 531-533, 535-536, 538-539, 542-545, 549-550, 552, 554, 556, 558, 560, 562, 564, 576-578, 599-601, 614-615, 619, 621-623, 626, 629-630, 632, 636-644, 646-647, 652-653, 660-671, 676-681, 683-687, 691-698
789D OEM TWP00102-00105
789D XQ SHH00288-00319
PARTS NEEDED
Qty
Part Number Description
4 2682960 CLAMP-V-BAND
In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 7% of dealership population. This is an initial order recommendation only, and the ultimate responsibility for ordering the total number of parts needed to satisfy the program lies with the dealer.
ACTION REQUIRED
Inspect turbocharger identification plates to determine if turbochargers are part of the population (RIM41565 and older) that has the interference condition.
Refer to Image 1 and Image 2 for guidance on turbocharger identification and determination of build date.
The turbocharger identification plate can be found on the top of the turbocharger cartridge near the oil supply. Use the process below to determine the build date of the turbocharger from the serial number. The example being used is RIM41565.
R = Build Year - 2014
I = Build Month - September
M = Facility Code
41565 = Sequence Number
If turbochargers have serial numbers of RIM41565 or older and existing 268-2960 v-band clamps have accumulated 4000 hours or more, replace the clamps. Refer to Images 3 and Image 4 for examples of clamp failure.