Checking The Oil Pump; Checking The Relief Valve - Yamaha FJR13AEV(C) Service Manual

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CHECKING THE OIL PUMP

• Oil pump driven sprocket

• Oil pump housing

• Oil pump housing cover

Cracks/damage/wear → Replace the defec-

tive part(s).

• Inner-rotor-to-outer-rotor-tip clearance "a"

• Outer-rotor-to-oil-pump-housing clearance

• 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

Less than 0.12 mm (0.0047 in)

0.20 mm (0.0079 in)

Outer-rotor-to-oil-pump-housing

0.090–0.150 mm (0.0035–0.0059

0.220 mm (0.0087 in)

Oil-pump-housing-to-inner-and-

outer-rotor clearance

0.03–0.08 mm (0.0012–0.0032 in)

0.15 mm (0.0059 in)

• Oil pump operation

Rough movement → Repeat steps (1) and

(2) or replace the defective part(s).

• Relief valve body "1"

• Relief valve "2"

• Spring "3"

• O-ring "4"

Damage/wear → Replace the defective

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