Checking The Oil Pump; Checking The Rotary Filter; Assembling The Oil Pump - Yamaha RAPTOR YFM125RA Service Manual

EAS24960

CHECKING THE OIL PUMP

1. Check:
• Oil pump drive gear
• Oil pump driven gear
• Oil pump housing
• Oil pump housing cover
Cracks/damage/wear → Replace the
defective part(s).
2. Measure:
• Inner-rotor-to-outer-rotor-tip clearance "a"
• Outer-rotor-to-oil-pump-housing clear-
ance "b"
• Oil-pump-housing-to-inner-rotor-and-
outer-rotor clearance "c"
Out of specification → Replace the oil
pump.
Inner-rotor-to-outer-rotor-tip
clearance
Less than 0.15 mm (0.0059 in)
Limit
0.23 mm (0.0091 in)
Outer-rotor-to-oil-pump-hous-
ing clearance
0.130–0.193
0.0076 in)
Limit
0.263 mm (0.0104 in)
Oil-pump-housing-to-inner-and-
outer-rotor clearance
0.060–0.100
0.0039 in)
Limit
0.15 mm (0.0059 in)
mm (0.0051–
mm (0.0024–
5-42
1. Inner rotor
2. Outer rotor
3. Oil pump housing
3. Check:
• Oil pump operation
Rough movement → Repeat steps (1)
and (2) or replace the oil pump assembly.
EAS29010

CHECKING THE ROTARY FILTER

1. Check:
• Rotary filter
Cracks/damage/wear → Replace.
Contaminants → Clean with engine oil.
EAS25000

ASSEMBLING THE OIL PUMP

1. Lubricate:
• Oil pump inner rotor
• Oil pump outer rotor
• Oil pump shaft
(with the recommended lubricant)
OIL PUMP