1998/07/01 Caterpillar


New Counterweight Bolt Assembly Replaces Bolt And Washer {1231}

Usage:


3508 (95Y, 68Z),
3512 (1LM, 49Y, 65Z),
3516 (27Z, 71Z) Industrial;
3508 (6TJ),
3508B (5PS),
3512 (2WK),
3512B (3ZW),
3516 (9KF) Locomotive;
3508 (3PS, 3TS, 96Y, 69Z),
3508B (2BM, 3DM, 7SM, 1TW, 3DW),
3512 (3RS, 3WS, 50Y, 66Z),
3512B (7HM, 8EM, 4TN, 1PW, 2GW),
3516 (4MJ, 3SS, 3XS, 29Z, 72Z),
3516B (8CN, 8KN, 9AN, 2FW, 3CW) Marine;
3508 (97Y),
3512 (51Y),
3516 (28Z) Vehicular;
3508 (1ZF, 5XM, 3LS, 23Z, 70Z),
3508B (4GM, 6PN, 2HW),
3512 (3YF, 6PM, 3MS, 24Z, 67Z),
3512B (8RM, 6WN, 4AW),
3516 (4XF, 5SJ, 7KM, 3NS, 25Z, 73Z),
3516B (6HN, 7RN, 1NW) Generator Set;
G3508 (4WD, 2JF, 9TG, 9AW),
G3512 (4KC, 5JD, 7NJ, 6JW),
G3516 (3RC, 8LD, 4EK, 5PN, 8PW) Engines

Reference: Engine News, November 1989, Page 7, "New Crankshaft Counterweight Bolt And Washer Used"

Description of Change: A new crankshaft counterweight bolt assembly is used in these engines. The new bolt assembly includes a bolt with a permanently captured washer.

Adaptable To: The new 128-4845 Bolt Assembly can be used as a direct replacement for the 7E-4201 Bolt and 7E-4202 Washer in 3500 engine crankshaft counterweights with 32.5 mm (1.28 in) diameter holes. Crankshaft counterweights with 27.0 mm (1.06 in) diameter holes must still use 7E-4201 Bolt and 7E-4725 Washer. See the Reference Article.

Caterpillar Information System:

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1998/06/01 Correction To Service Manual Module, RENR1253, Electronic Modular Control Panel II+ (EMCP II+) For MUI Engines{4490}
1998/06/01 New 157-1946 Air And Temperature Control Group (Cabinet Cooler) Available For Marine Monitoring System (MMS){7451}
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1998/07/01 Gas Engine Technical Publications {0374}
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1998/08/01 Lower O-Ring Seal Removed From Hydraulically Actuated Electronically Controlled Unit Injector (HEUI) Groups {1290}
1998/08/01 3116 And 3126 Marine Engine Oil Requirements And Air System Maintenance {1318,1050}
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1998/08/01 Piston And Piston Ring Reference Chart For 3500 And 3500B Engines {1214,1215}
1998/08/01 New Piston Rings Provide Increased Service Life {1215}
1998/08/01 The Causes Of Worn And Broken Piston Rings {1215}
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