Checking The Oil Pump - Yamaha XP500 Service Manual

OIL PUMP

CHECKING THE OIL PUMP

1. Check:
• oil pump driven gear 1
• oil pump housing 2
• oil pump cover 3
Cracks/damage/wear → Replace the defec-
tive part(s).
2. Measure:
The following procedure applies to all of the
inner rotor and outer rotor.
• inner-rotor-to-outer-rotor-tip clearance a
• outer-rotor-to-oil-pump-housing clearance
b
• oil-pump-housing-to-inner-and-outer-rotor
clearanace c
Out of specification → Replace the oil
pump.
1 Inner rotor
2 Outer rotor
3 Oil pump housing
Inner-rotor-to-outer-rotor-tip
clearance
0.04 ~ 0.12 mm
(0.0016 ~ 0.0047 in)
<Limit>: 0.20 mm (0.0079 in)
Outer-rotor-to-oil-pump-housing
clearance
0.045 ~ 0.085 mm
(0.0018 ~ 0.0033 in)
<Limit>: 0.15 mm (0.0059 in)
Oil-pump-housing-to-inner-and-
outer-rotor clearance
0.11 ~ 0.23 mm
(0.0043 ~ 0.0091 in)
<Limit>: 0.30 mm (0.0118 in)
3. Check:
• oil pump operation
Unsmooth → Repair or replace the defec-
tive part(s).
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ENG