Checking The Oil Pump; Checking The Relief Valve; Checking The Oil Pipes; Checking The Oil Pump Drive Chain - Yamaha 2009 XP500Y TMAX Service Manual

EAS24960

CHECKING THE OIL PUMP

1. Check:
• Oil pump driven gear "1"
• Oil pump housing 2 "2"
• Oil pump housing 1 "3"
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.
1. Inner rotor
2. Outer rotor
3. Oil pump housing
Inner-rotor-to-outer-rotor-tip
clearance
0.040–0.120 mm (0.0016–0.0047
in)
Limit
0.20 mm (0.0079 in)
Outer-rotor-to-oil-pump-housing
clearance
0.045–0.085 mm (0.0018–0.0033
in)
Limit
0.155 mm (0.0061 in)
Oil-pump-housing-to-inner-and-
outer-rotor clearance
0.11–0.23 mm (0.0043–0.0091 in)
Limit
0.30 mm (0.0118 in)
3. Check:
• Oil pump operation
Rough movement → Repeat steps (1) and
(2) or replace the defective part(s).
EAS24970

CHECKING THE RELIEF VALVE

1. Check:
• Relief valve body
Damage/wear → Replace.
EAS4B51030

CHECKING THE OIL PIPES

1. Check:
• Oil pipe
• Oil delivery pipe
Damage → Replace.
Obstruction → Wash and blow out with com-
pressed air.
EAS4B51031

CHECKING THE OIL PUMP DRIVE CHAIN

1. Check:
• Oil pump drive chain
Cracks/stiffness → Replace the oil pump
chain and oil pump driven sprocket as a set.
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OIL PUMP