1990-1998 Arctic Cat Snowmobiles Repair Manual, Page 196Get this manual
186 CAUTION Prying the cases apart with screwdriver or any other sharp tool will damage the sealing suifaceIf all of the case bolts are removed, you should be able to separate the case halves with no more force other than tapping the bolt bosses as described in Step 9Remember, damage to one case halfwill require replacement of both
CHAPTER FIVE
3Clean the crankshaft assembly in solvent and dry with compressed airLubricate the bearings with injection oil to prevent rusting
9Tap on the large bolt bosses with soft mallet to break: the crankcase halves apart and then remove the bottom half (Figure 87)NOTE To reduce the damage to the long studs attached to the upper crankcase half of air-cooled models, lift the upper case half from the lower halfOn liquidcooled models, lift the bottom case half from the top half
10Lift the crankshaft (Figure 93) from the upper crankcase half and set it aside carefully so that you do not damage the connecting rodsBlock the crankshaft so that it cannot roll off of the workbench11If necessary, remove the coolant pump and oil injection pump driveshaft as described in this chapterCleaning 1Clean both crankcase halves with cleaning solventThoroughly dry with compressed air and wipe off with clean shop clothBe sure to remove all traces of old sealer from mating surfaces2Clean all the oil passages in the crankcase, then blow passages out with compressed airCAUTION Make sure the cleaning solvent used to clean the crankshaft is cleanIf any dirt enters the close clearances of the bearings while cleaning, it will be difficult to remove and can cause bearing damage