Yamaha Grizzly550, User Manual

Page: 261 / 443

CRANKSHAFT AND OIL PUMP
5-70
EAS28P1054
REMOVING THE CRANKSHAFT
1. Remove:
• Crankshaft “1”
TIP
• Remove the crankshaft with the crankcase
separating tool “2”.
• Make sure the crankcase separating tool is
centered over the crankshaft.
NOTICE
ECA28P1029
• To protect the end of the crankshaft, place
an appropriate sized socket between the
crankcase separating tool bolt and the
crankshaft.
• Do not tap on the crankshaft.
EAS24960
CHECKING THE OIL PUMP
1. Check:
• Oil pump housing
• Oil pump housing cover
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 clearance
“b”
• Oil-pump-housing-to-inner-rotor-and-outer-
rotor clearance “c”
Out of specification
→
Replace the oil pump.
3. Check:
• Oil pump operation
Rough movement
→
Repeat steps (1) and
(2) or replace the defective part(s).
Crankcase separating tool
90890-01135
Crankcase separator
YU-01135-B
1
2
Inner-rotor-to-outer-rotor-tip
clearance
Less than 0.12 mm (0.0047 in)
Limit
0.20 mm (0.0079 in)
Outer-rotor-to-oil-pump-housing
clearance
0.090–0.170 mm (0.0035–0.0067
in)
Limit
0.24 mm (0.0094 in)
Oil-pump-housing-to-inner-and-
outer-rotor clearance
0.03–0.10 mm (0.0012–0.0039 in)
Limit
0.17 mm (0.0067 in)
1. Inner rotor
2. Outer rotor
3. Oil pump housing
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