Yamaha YFM45FAR, Service Manual

Page: 206 / 405

4 - 68
ENG
CRANKSHAFT AND OIL PUMP
3.Check:
●
Oil pump operation
Unsmooth
→
Repeat steps #1 and #2 or
replace the defective parts.
CHECKING THE CRANKSHAFT
1.Measure:
●
Crank width
A
Out of specification
→
Replace the
crankshaft.
●
Side clearance
D
Out of specification
→
Replace the
crankshaft.
●
Runout
C
Out of specification
→
Replace the
crankshaft.
*****************************************************
Crankshaft reassembling point:
The crankshaft
1
and the crank pin
2
oil
passages must be properly interconnected
with a tolerance of less than 1 mm (0.04 in).
*****************************************************
CAUTION:
The buffer boss and woodruff key should
be replaced when removed from the
crankshaft.
Crank width:
62.95 ~ 63.00 mm
(2.4783 ~ 2.4803 in)
Big end side clearance:
0.25 ~ 0.75 mm
(0.0098 ~ 0.0295 in)
<Limit>: 1.00 mm (0.0394 in)
Runout limit:
C1: 0.03 mm (0.0012 in)
C2: 0.03 mm (0.0012 in)