Usage:
768C (02X),
772B (64W),
776C (2TK) Tractors;
769C (01X),
771C (3BJ),
773B (63W),
775B (7XJ) Off-Highway Trucks
- SUPPLEMENT: 05/26/97
Service Magazine; February 26, 1996; Page 4; "Service Manual And Service Kits Available For Engine Variable Speed Fan Clutch".
Disregard these articles and see the article titled "Variable Speed Fan Drives" in this issue.
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- SUPPLEMENT: 02/26/96
Service Magazine; February 26, 1996; Page 4; "Service Manual And Service Kits Available For Engine Variable Speed Fan Clutch"for 768C, 772B, 776C Tractors; 769C, 771C, 773B, 775B Trucks.
The part number for the overhaul kit is incorrect. The correct part number is 121-5767 Overhaul Kit.
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The Service Manual, SENR8603, Variable Speed Fan Clutch, is available to help service the 6I-4427 Fan Drive Group on the engines in the above machines. This service manual is available through normal Caterpillar literature ordering channels. The service manual describes how the fan drive operates and provides disassembly and assembly information.
The 121-5756 Seal Kit and 121-5757 Overhaul Kit are available to service the 6I-4427 Fan Drive Group. The seal kit includes the components required to replace the front and rear shaft seals and wear sleeves. The overhaul kit includes all the components of the seal kit and other components required for a complete rebuild of the fan drive group.