Polaris 2001 High-Performance Snowmobile Service Manual (PN 9916690), Page 235Get this manual
CHASSISBRAKESFINAL DRIVE Hayest Master Cylinder Inspection and Replacing Cartridge Subassembly
4Lift the housing tab on the outlet end of the housing to release the cartridge assembly, allowing the cartridge to be pushed out the back of the housing
5Clean housing bore with alcoholInspect bore for scratches, dents, cuts, or digs that might cause leakReplace housing if severe damage is found