35268 Mercury SCREW, SPRING TO LIMITER FOLLOWER (3/8")

09Aug2007
U-388
A-323
D-320
O-345
Priority
PRODUCT IMPROVEMENT PROGRAM TO RELOCATE LIMIT SWITCHES AND ADD VIBRATION DAMPERS TO THE AUTOMATIC AIR SHUTOFFS(ASOS) ON CERTAIN 3508, 3512, AND 3516 ENGINES
1078 PI31322
This Program must be administered as soon as possible.When reporting the repair, use "PI31322" as the Part Number and "7751" as the Group Number, "56" as the Warranty Claim Description Codeand "T" as the SIMS Description code. Exception: If the repair is done after failure, use "PI31322" as the Part Number, "7751" as the Group Number,"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.
COMPLETION DATE
TERMINATION DATE
29Feb2008 31Aug2008
PROBLEM
Relative motion between the air shutoff gate and the housing may cause a wear-step in the housing. The limit switches can wear and fail as well. Either of these actions can prevent the gate from closing and can lead to engine damage if the engine is operated with one gate opened and one gate closed.
AFFECTED PRODUCT
Model Identification Number
*******Group 1*******
3516 2TS00001-00007
3JS00001-00008
DV-3508B BAG00024
LPD00001-00002
DV-3512 NSC00001-00006
DV-3512B 4DR00001-00007
AAG00001-00005
*******Group 2*******
3508B 1TW00272, 275, 317-318, 320-321, 347
2BM00151-00154, 157-158
2HW00100-00101, 104-116, 124, 134-135, 138-140, 142-146, 148, 152-157, 159-161, 164, 169-179, 185-188, 190-198, 201-205, 208, 211, 214-216, 218-219, 221, 223-237, 239-250, 252-253, 255, 258-261, 263-264, 266-267, 269-271, 273-274, 276, 279, 281-286, 289-292, 296-300, 302-306, 308-309, 315, 325, 329, 331
3DM00082, 86, 90-91, 94-95, 98-100, 102-103, 105, 107, 112-113, 118, 120-122, 132, 134-135, 139-141, 144-146, 152-154, 165, 169, 173, 176, 178-179, 184, 186-188, 190-191, 193, 195-196, 199-200, 212-213, 224, 227, 230, 253-254, 256-257, 261-264, 272-275, 284, 287-294, 296-297, 299-307, 313-318, 320, 325-326, 328, 344-345, 347-350, 352, 362-364, 367-368, 370, 372, 374-375, 377-378, 380, 385, 403, 410-418, 429, 433, 445-446, 449-450, 465, 471-473, 491, 497, 499, 507-509
3DW00144-00149, 152, 154-162, 164, 166-171, 175-177, 179
5KW00918, 1790, 1792, 2062
6PN00801
7SM00038, 40-41, 43, 113-116, 118-120, 126-130, 134, 148, 150, 159, 168, 174-175, 184, 202, 204, 251, 253, 264, 356-357, 369-370, 375-376, 378, 380-381, 476, 479-480, 488, 539-540, 571-572, 586, 648-649, 656, 662-663, 689-690, 692-693, 695-696, 702-703, 708-710, 723-726, 735, 746-747, 753, 757-759, 762-766, 772-776, 779-780, 782, 787-789, 797-801, 803, 843-844, 855, 862, 935-936, 951-952, 986-987, 1013-1014
BGX00109-00110, 112-113
BPX00094, 97, 106-108, 114
CBB00111-00115, 117-118, 121, 123-127, 131-132, 134, 138-140, 142-143, 145, 147-164, 168, 170-171, 173-175, 177, 179-190, 193, 196, 199, 201-202, 204-207, 210, 212, 217-221, 224-228, 231, 236-238, 240-243, 245, 247, 250-253, 259-261, 266-271, 276, 278-280, 283, 285-290, 292, 294-295, 297, 299, 301-302, 304-305, 307, 310-317, 321, 323-325, 327-328, 330, 332, 334, 339, 343-344, 346-350, 354-357, 360-361, 363, 365-371, 375-378, 380, 382-383, 385-386, 389-393, 395, 397, 400, 402, 404-405, 407-413, 415-416, 420-421, 427, 430, 434-439, 441, 443
CNB00596-00598, 600, 602-604, 611, 634-635, 650, 652, 703, 718, 720, 953-954, 1321-1323, 1331, 1490, 1582, 1586, 1593
S2A00100-00101, 120
S2B00105, 148-149, 151, 172-173, 230-231, 233-234, 243-244
S2E00112-00113, 243, 245, 249-250, 299, 321, 324
S2F00111, 117
3508C LLC00100-00102
3512 50Y01664
3512B 1PW00321-00334, 337-339, 345, 349-353, 356, 361, 363-367, 373-396, 407-412, 418-419, 422-426, 442-444, 446
2AF00200, 203-204, 208, 212, 214, 222-224, 228, 231-236