1989 Ski-Doo Repair Manual, Page 329Get this manual

1989 Ski-Doo Repair Manual, Page 329

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Section 03 TRANSMISSION Sub-section 07 (CHAINCASE)
1,11,29, Seal, cotter pinO-ring
Install new cotter pin and replace seal and O-ringCAUTION: When removing cotter pin always replace with n