1983 Ski-Doo Shop Manual, Page 89Get this manual
SECTION 02 ENGINE SUB-SECTION 05 (503 ENGINE TYPE)
CLEANING
Discard all seals, gaskets and "0" rings Clean all metal components in non-ferrous metal clean erRemove old sealant from crankcase mating surfaces with Bombardier sea lant stripper_ CAUTION: Never use sharp object to scrape away old sealant as score marks incurred are detrimental to crankcase sealing
ASSEMBLY
Prior to installation, place bearings into an oil container heated to lOODC (212 DF)This wi ll expand bearings and ease insta llationInsta ll bearings with groove as per exp loded view Bearings are pressed on crankshaft until they rest against radiusThese radius maintain the gap needed for bearings lubrication At seal assembly, app ly light coat of lithium grease on seal lipFor bearing lubrication purpose, gap of 1.0 mm
(,040") must be maintained between seals and bearings
DISASSEMBLY
General
To remove drive pulley, refer to "Drive Pul ley", section 03, sub-sect ion 03To remove magneto, refer to "Magneto" in this section To remove ball bea rings from crankshaft, use specia pul ler (see Too ls)