Oil Pump; Pressure Relief Valve; Oil Pump Removal/Inspection - Polaris Trail Boss 330 2003 Service Manual

ENGINE

PRESSURE RELIEF VALVE

The pressure relief valve opens to relieve any excess
pressure from the oil pump if oil pressure reaches
approximately 71 psi. It must be clean and have
adequate spring pressure in order to seal properly.
1. Remove cap bolt, sealing washer, spring, and
relief valve from MAG side crankcase.
2. Inspect free length of spring and check coils for
distortion.
Relief Valve Spring Free Length:
Std: 2.175² (5.52 cm)
3. Inspect valve for wear.
4. Check seat area for nicks or foreign material that
may prevent proper sealing of valve.

OIL PUMP

REMOVAL/INSPECTION
1. Remove the five screws on the oil pump cover
with an impact driver.
2. Inspect rotors and mating surface of oil pump
cover. Check for nicks, burrs, or surface
irregularities.
3. Measure pump end clearance using a feeler
gauge and straight edge.
3.28
Outer Feed Rotor to Crankcase Clearance:
Std: .001-.003 (.0254-.0762 mm)
Wear Limit: .004 (.1016 mm)
4. Measure clearance between outer feed rotor and
crankcase pocket with a feeler gauge.
Pump End Clearance:
Std: .001-.003 (.0254-.0762 mm)
Wear Limit: .004 (.1016 mm)