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ENG
OIL PUMP
INSPECTION
Oil pump
1. Inspect:
• Oil pump drive gear
1
• Oil pump drive shaft
2
• Rotor housing
3
• Oil pump cover
4
Cracks/wear/damage
→
Replace.
1
3
2
4
2. Measure:
• Tip clearance
a
(between the inner rotor
1
and outer
rotor
2
)
• Side clearance
b
(between the outer rotor
2
and rotor
housing
3
)
• Housing and rotor clearance
c
(between the rotor housing
3
and rotors
1
2
)
Out of specification
→
Replace the oil
pump assembly.
Tip clearance
a
:
0.12 mm or less
(0.0047 in or less)
<Limit>: 0.20 mm (0.008 in)
Side clearance
b
:
0.09 ~ 0.17 mm
(0.0035 ~ 0.0067 in)
<Limit>: 0.24 mm (0.009 in)
Housing and rotor clearance
c
:
0.03 ~ 0.10 mm
(0.0012 ~ 0.0039 in)
<Limit>: 0.17 mm (0.0067 in)
3. Check:
• Unsmooth
→
Repeat steps #1 and #2 or
replace the defective parts.
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