Assembling The Oil Pump - Yamaha WR250F 2016 Owner's Service Manual

Inner-rotor-to-outer-rotor-tip
clearance
Less than
0.150 mm (0.0059 in)
Limit
0.20 mm (0.0079 in)
Outer-rotor-to-oil-pump-housing
clearance
0.13–0.18 mm (0.0051–0.0071 in)
Limit
0.24 mm (0.0094 in)
Oil-pump-housing-to-inner-and-
outer-rotor
clearance
0.06–0.11 mm (0.0024–0.0043 in)
Limit
0.17 mm (0.0067 in)
1
2
3
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 defective part(s).
EAS2GB7303
OIL PUMP AND BALANCER GEAR

ASSEMBLING THE OIL PUMP

1. Install:
• Oil pump drive shaft "1"
• Inner rotor "2"
• Dowel pin "3"
TIP
• Apply the engine oil on the oil pump drive
shaft and inner rotor.
• Fit the dowel pin into the groove in the inner
rotor.
b
2. Install:
• Outer rotor "1"
TIP
Apply the engine oil on the outer rotor.
a
c
3. Install:
• Oil pump cover "1"
• Oil pump cover screw "2"
6-59
3
E
Oil pump cover screw
2.0 Nm (0.20 m·kgf, 1.4 ft·lbf)
1
2
1
2
1