Oil Pump Inspection - Yamaha WaveRunner Service Manual

POWR
4
2
1 2
OIL PUMP
3
1
3 4
SERVICE POINTS

Oil pump inspection

1. Check:
• Oil pump housing cover 1 1
• Oil pump housing cover 2 2
• Oil pump housing 1 3
• Oil pump housing 2 4
Cracks/damage/wear → Replace the
defective part(s).
2. Measure:
• Inner-rotor-to-outer-rotor-tip clearance
a
• Outer-rotor-to-oil-pump-housing
clearance b
Out of specification → Replace the oil
pump.
1 Inner rotor
2 Outer rotor
3 Oil pump housing
Inner-rotor-to-outer-rotor-tip
clearance a:
0.09–0.15 mm (0.0035–0.0059 in)
Outer-rotor-to-oil-pump-housing
clearance b (scavenge pump):
0.09–0.15 mm (0.0035–0.0059 in)
Outer-rotor-to-oil-pump-housing
clearance b (feed pump):
0.09–0.17 mm (0.0035–0.0067 in)
3. Check:
• Oil pump operation
Rough movement → Replace the defec-
tive part(s).
Check valve inspection
1. Check:
• Check valve seat 1
• Check valve body 2
• Check valve 3
• Spring 4
Damage/wear → Replace the defective
part(s).
5-30
E