2006-2008 Polaris Snowmobiles FS/FST Service Manual., Page 159Get this manual
FSFST Engine Inspect the drive key for damageAssembly is the reverse of disassemblyInstall the timing rotor, and verify the locking pin is engaged in its designated bore9Install the inner and outer rotors with the orientation dots facing outwards10Install two new o-rings on the pump cap11Verify the snap ring chamfer faces out during installation678aligns with the single dot on the crankshaft drive gear
Gear Train
NOTE: The following gears can be replaced without crankcase disassembly: Starter Motor Pinon Gear Balance Shaft Drive Gear Water Pump Pinon Gear Water Pump DriveshaftGear Assembly Scavenge Oil Pump Pinon Gear Scavenge Pump Drive Gear NOTE: The following gears require component replacement and crankcase disassembly: Crankshaft Timing GearRequires crankshaft replacement Water Pump Pinon Drive GearRequires balance shaft replacement1Follow the procedures for removing the gear cover and flywheel preceding this section in this chapterSee "MAG Gear Cover AssemblyWater Pump Driveshaft Removal and Installation" on page 6.30And See "Flywheel Removal and Installation" on page 6.31The starter motor pinon gear and scavenge oil pump pinon gear can be removed by simply sliding the gears off of their respective shaftsRemove the balance shaft drive gear by removing the nut, then install the gear removal tool, PN: PW-46982Pull the gear off of the shaftThe water pump pinon gear can be removed once the balance shaft drive gear is removedInspect each gear as it is removed for signs of damage and improper functionGear bearings should rotate smoothly without bindingWhen installing the balance shaft drive gear, apply Loctite 272 to shaft threadsPosition the gearbalance shaft so the single dot on the gear