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OIL PUMP
INSPECTION
Oil pump
1. Inspect:
• Oil pump drive gear
• Oil pump driven gear
• Rotor housing
• Oil pump cover
Cracks/wear/damage → Replace.
2. Measure:
• Tip clearance a
Between the inner rotor 1 and the outer
rotor 2.
• Tip clearance b
Between the outer rotor 2 and the rotor
housing 3.
Out of specification → Replace the oil
pump.
Tip clearance a:
0.12 mm or less
(0.0047 in or less)
<Limit>: 0.20 mm (0.008 in)
Tip clearance b:
0.09 ~ 0.17 mm
(0.0035 ~ 0.0067 in)
<Limit>: 0.24 mm (0.009 in)
Side clearance c:
0.03 ~ 0.10 mm
(0.0012 ~ 0.0039 in)
<Limit>: 0.17 mm (0.007 in)
3. Check:
• Unsmooth → Repeat steps #1 and #2 or
replace the defective parts.
ASSEMBLY AND INSTALLATION
Oil pump
1. Install:
• Oil pump drive shaft 1
• Washer 2
• Pin 3
• Inner rotor 1 4
NOTE:
• Apply the engine oil on the oil pump drive
shaft and inner rotor 1.
• Fit the pin into the groove in the inner rotor 1.
4 - 70
ENG
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