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EAS30336
CHECKING THE SPROCKET AND CHAIN
1. Check:
• Oil pump drive sprocket
Refer to "CHECKING THE CLUTCH HOUS-
ING" on page 5-44.
2. Check:
• Oil pump drive chain "1"
Damage/stiffness Replace the oil pump
drive chain and oil pump drive sprocket
(clutch housing) as a set.
EAS30337
CHECKING THE OIL PUMP
1. Check:
• Oil pump driven sprocket "1"
• Oil pump housing "2"
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
"b"
Out of specification Replace the defective
part(s).
1
2
clearance
Inner-rotor-to-outer-rotor-tip
clearance
Less than 0.120 mm (0.0047 in)
Limit
0.200 mm (0.0079 in)
Outer-rotor-to-oil-pump-housing
clearance
0.09–0.19 mm (0.0035–0.0075 in)
Limit
0.210 mm (0.0083 in)
1. Inner rotor
2. Outer rotor
3. Check:
• Oil pump operation
Rough movement Repeat steps (1) and
(2) or replace the defective part(s).
EAS30338
CHECKING THE RELIEF VALVE
1. Check:
• Relief valve "1"
• Spring "2"
Damage/wear Replace the oil pump as-
sembly.
5-53
OIL PUMP
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