2003 Polaris Deep Snow Snowmobiles Service Manual, Page 305Get this manual
BRAKESFINAL DRIVE Chaincase Removal, Cont8Remove three (PRO has four) chaincase to bulkhead attaching nuts and boltsThe front bolt is through bolt, rear and bottom bolts are carriage boltsNOTE: On some machines it may be necessary to remove the rear exhaust bracket prior to lifting chaincase or removing drive shaft assembly9Remove O-Ring, seal sleeve and brake disc by tapping on jackshaft end with soft face hammer10Remove chaincase