KIT-SPIDER & BEARING 1934640 - Caterpillar

SEBE8677-07 March 1, 2004
(Revised March 2007)
U-58
A-39
D-43
O-45
Safety PRODUCT IMPROVEMENT PROGRAM FOR REMOVINGAIR SHUTOFF SYSTEM FROM CERTAIN 3508B, 3512B, AND 3516B ENGINES
1078 PI10268
This Program must be administered assoon as possible. When reporting the repair, use "PI10268" as the Partnumber and "7751" as the Group Number, "56" as the Warranty Claim DescriptionCode and "T" as the SIMS Description Code. Exception: If the repair isdone after failure, use "PI10268" as the Part Number, "7751" as the GroupNumber, "96" as the Warranty Claim Description Code, and "Z" as the SIMSDescription Code. This Revised Service Letter replacesthe March 1, 2004 (Revised June 2006) Service Letter. Changes have beenmade to the Rework Procdure.PROBLEM
In some instances, the air shutoff valves malfunctionon 3508B, 3512B, and 3516B Engines. Malfunctions include failure to closewhen required or inadvertent valve closure. This Service Letter authorizesthe removal of the air shutoff valves from 3500B series engines and theinstallation of a redundant electronic overspeed protection system. Thenew system satisfies marine society requirements to have a primary andsecondary overspeed shutdown system without the use of an air shutoff. Engines operating in a combustibleenvironment or in accordance with a sanctioning body requiring ASO's shouldnot have the ASO's removed!AFFECTED PRODUCT
Model Identification Number
***Group 1***
3516B 1NW135-137, 141-144
***Group 2***
3512B 5AW81, 82, 123, 124,126, 130, 131BRC147
3516B 1NW116, 117, 120, 121,127-130
***Group 3***
3512B 3ZW123, 130-144, 146-151, 153, 154, 156,157, 160-165, 167, 168, 170, 171, 175-177, 182-186, 193, 194, 197-207,211, 212, 216-219, 229-246, 248, 258, 260, 263, 266-270, 274-287, 290,293-298, 303-307, 310, 314-316, 320-323, 325, 335, 491-494, 503, 538, 549,552, 569, 570, 579, 580, 589, 594, 595, 609, 655, 658, 659, 662, 664, 701,702
***Group 4***
3508B 2HW100, 101, 103-116, 124, 134, 135, 137-140,142-146, 148, 152-156, 160, 161, 169-179, 193, 195-197, 201-205, 216-218,221, 223-2296PN801CBB111, 113-118, 121, 123-127, 129-132, 134,137, 139, 140, 142, 143, 147-164, 168, 170, 171CNB456-459, 4661FZ779
3512B 4AW169, 171, 173, 175, 189, 191, 192, 194-197,199, 200, 202-246, 248-262, 264-268, 270, 272-291, 298-301, 308-310, 315-317,320-323, 326, 327, 329-388, 390-406, 408-411, 413-420, 423-428, 430, 432-437,440, 441, 443-464, 481, 483, 486, 488-495, 497-500, 502-540, 542-546, 548-580,586, 597-602, 605, 609, 610, 612, 614-626, 628-649, 658-665, 668, 671-682,691-693, 696, 704-709, 715, 716, 720-723, 725, 727-730, 758, 769, 776,778, 779, 783, 785, 786, 818PARTS NEEDED
Qty
Part Number Description
***Group 1***
4 6V2605 Stud
2 1112078 Strap
2 1223374 Pipe
2 1277103 Spacer
4 6V5103 Seal
2 8T6764 Plug
4 9S8752 Nut