Polaris TRAIL BOSS 325 2001, Manual

Page: 106 / 296

ENGINE
3.50
CRANKSHAFT INSTALLATION
Lubricate all bearings with clean engine oil before assembly.
1. Install the crankshaft into the PTO side crankcase.
2. Install the proper shim on the magneto end of the crankshaft.
CRANKCASE OIL STRAINER INSPECTION
1. Remove bolt securing oil strainer to the MAG side crankcase.
2. Remove oil strainer and visually inspect for any rips, tears or obstructions in screen.
3. Replace oil strainer if it fails visual inspection.
CRANKCASE ASSEMBLY
1. Apply 3 Bond 1215 (P/N 2871557) to the crankcase mating surfaces. Be sure the alignment pins are in place.
2. Set the crankcase in position carefully. Mate the crankcase halves by tapping lightly with a soft faced hammer.
Continually check alignment of the cases during installation, closing the gap equally until the surfaces are
tightly sealed.
3. Install the crankcase flange bolts and tighten to specified torque in 3 steps according to the torque pattern.
See page 3.2.
OIL PUMP INSTALLATION
1. Inspect the oil pump sealing surface on the crankcase. Apply a light film of engine oil to the surface and install
outer and inner rotors over crankshaft .
2. Install oil pump cover. Torque screws to specified torque.
NOTE: Do not use gasket sealer on the pump mating surfaces.
Crankcase Sealant (3 Bond):
PN 2871557
Crankcase Bolt Torque:
14-15 ft. lbs. (19-21 Nm)
Oil Pump Cover Screw Torque:
4-5 ft. lbs. (5-7 Nm)