OIL PUMP
5-84
EAS24960
CHECKING THE OIL PUMP
1. Check:
• Oil pump housing
• Oil pump housing cover
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.
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
• Relief valve
• Spring
Damage/wear → Replace the defective
part(s).
2. Check:
• Ball
• Collar
• Spring
• Oil seal
Damage/wear → Replace the defective
part(s).
EAS24990
CHECKING THE OIL STRAINER
1. Check:
• Oil strainer (crankcase)
Damage → Replace.
Contaminants → Clean with solvent.
EAS25000
ASSEMBLING THE OIL PUMP
1. Lubricate:
• Inner rotor
• Outer rotor
• Oil pump shaft
(with the recommended lubricant)
2. Install:
• Oil pump housing “1”
• Oil seal “2”
• Oil pump outer rotor 2 “3”
• Oil pump inner rotor 2 “4”
• Pin “5”
Inner-rotor-to-outer-rotor-tip
clearance
0.12 mm (0.0047 in) or less
Limit
0.20 mm (0.0079 in)
Outer-rotor-to-oil-pump-housing
clearance
0.09–0.15 mm (0.0035–0.0059 in)
Limit
0.220 mm (0.0087 in)
Oil-pump-housing-to-inner-and-
outer-rotor clearance
0.03–0.08 mm (0.0012–0.0031 in)
Limit
0.150 mm (0.0059 in)
1. Inner rotor
2. Outer rotor
3. Oil pump housing
Recommended lubricant
Engine oil
New
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