Checking The Oil Pump - Yamaha XT660R Service Manual

OIL PUMP
EAS00364

CHECKING THE OIL PUMP

1. Check:
• oil pump driven gear 1
• oil pump housing 1 2
• oil pump housing cover 3
• oil pump housing 2 4
Cracks/damage/wear → Replace the defec-
tive part(s).
2. Measure:
• inner-rotor-to-outer-rotor-tip clearance a
• outer-rotor-to-oil-pump-housing
b
• oil-pump-housing-to-inner-rotor-and-outer-
rotor clearance 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
0.07 ~ 0.12 mm
(0.0028 ~ 0.0047 in)
<Limit>: 0.2 mm (0.008 in)
Outer-rotor-to-oil-pump-housing
clearance
0.03 ~ 0.08 mm
(0.0012 ~ 0.0031 in)
<Limit>: 0.15 mm (0.0059 in)
Oil-pump-housing-to-inner-rotor-
and-outer-rotor clearance
0.03 ~ 0.08 mm
(0.0012 ~ 0.0031 in)
<Limit>: 0.15 mm (0.0059 in)
3. Check:
• oil pump operation
Rough movement → Repeat steps (1) and
(2) or replace the defective part(s).
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ENG
clearance