Checking The Oil Pump - Yamaha XF50W Service Manual

EAS00364

CHECKING THE OIL PUMP

1. Check:
• oil pump drive gear
• oil pump driven
• oil pump housing
• oil pump housing cover
Cracks/damage/wear
defective part(s).
2. Measure:
• inner-rotor-to-outer-rotor-tip clearance A
• outer-rotor-to-oil-pump-housing clear-
ance
• oil-pump-housing-to-inner-rotor-and-
outer-rotor clearance
Out of specification
pump.
© Inner rotor
(2) Outer rotor
(3) Oil pump housing
Inner-rotor-to-outer-rotor-tip clear-
ance
Outer-rotor-to-oil-pump-housing
clearance
11710404
Oil-pump-housing-to-inner-rotor-
and-outer-rotor clearance
3. Check:
• oil pump operation
Rough movement -»Repeat steps (1) and
(2) or replace the defective part(s).
5-62
OIL PUMP
gear©
-»
\B\
\c\
-»
0.15 mm (0.006 in) or less
<Limit>: 0.23 mm (0.009 in)
0.13 ~ 0.18 mm (0.005 ~ 0.007 in)
<Limit>: 0.25mm (0.010 in)
0.07 ~ 0.12 mm (0.003 ~ 0.005 in)
<Limit>: 0.19 mm (0.008 in)
Replace the
Replace the oil