Yamaha XVS250 2001 - Checking the Oil Pump; Assembling the Oil Pump

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OIL PUMP
ENG
CHECKING THE OIL PUMP
1. Check:
 oil pump drive gear
1
 oil pump driven gear
2
 oil pump housing
 oil pump housing cover
Cracks/damage/wear  Replace the de-
fective part(-s).
2. Measure:
 inner-rotor-to-outer-rotor-tip clearance
a
 outer-rotor-to-oil-pump-housing clearance
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
0.15 mm
<Limit>: 0.2 mm
Outer-rotor-to-oil-pump-housing
clearance
0.03  0.09 mm
<Limit>: 0.15 mm
Oil-pump-housing-to-inner-rotor-
and-outer-rotor clearance
0.03  0.09 mm
<Limit>: 0.15 mm
3. Check:
 oil pump operation
Unsmooth  Repeat steps (1) and (2) or re-
place the defective part(-s).
EAS00375
ASSEMBLING THE OIL PUMP
1. Lubricate:
 inner rotor
 outer rotor
 oil pump shaft
(with the recommended lubricant)
Recommended lubricant
Engine oil