Removing The Crankshaft; Checking The Oil Pump - Yamaha YFM660FP Service Manual

CRANKSHAFT AND OIL PUMP

REMOVING THE CRANKSHAFT

1.Remove:
Crankshaft
●
Use a crankcase separating tool 1.

CHECKING THE OIL PUMP

1.Check:
Rotor housings
●
Rotor cover
●
Cracks/wear/damage → Replace.
2.Measure:
Tip clearance a
●
(between the inner rotor 1 and the outer
rotor 2)
Side clearance b
●
(between the outer rotor 2 and the pump
housing 3)
Out of specification → Replace the oil pump.
3.Check:
Oil pump operation
●
Unsmooth → Repeat steps #1 and #2 or
replace the defective parts.
4 - 74
ENG
Crankcase separating tool:
P/N. YU-01135-A, 90890-01135
Tip clearance a:
0.03 ~ 0.10 mm
(0.0012 ~ 0.0039 in)
<Limit>: 0.15 mm (0.006 in)
Side clearance b:
0.03 ~ 0.10 mm
(0.0012 ~ 0.0039 in)
<Limit>: 0.12 mm (0.005 in)