- Using an indicator, measure the inner diameter of the oil pump housing bushing.
Inner diameter:
- Standard: 38.113-38.138 mm (1.500-1.501 inches)
- Maximum: 38.188 mm (1.503 inches)
Important: Measure in different places and average. If the measurement value is greater than the maximum, replace the oil pump housing with a new one.
2. Check the reactor shaft sleeve.
- Using an indicator, measure the inner diameter of the reactor shaft sleeve.
Inner diameter:
- Standard: 22.201-22.227 mm (0.874-0.875 inches)
- Maximum: 22.257 mm (0.876 inches)
Important: Measure in different places and average. If the measurement value is greater than the maximum, replace the reactor shaft with a new one.
3. Check the clearance between the gear and the housing.
- Move the outer gear until it stops against the housing wall. Measure the gap with a feeler gauge.
Clearance between gear and housing:
- Standard: 0.075-0.150mm
- Maximum: 0.200 mm
4. Check the clearance between the tooth heads of both gears.
- Using a feeler gauge, measure the gap between the teeth of the drive gear and the sickle-shaped part of the pump body.
Clearance between the heads of the teeth of the drive gear:
- Standard: 0.013-0.292mm (0.001-0.011 inches)
- Maximum: 0.342 mm (0.013 inches)
- Using a feeler gauge, measure the gap between the driven gear teeth and the crescent-shaped part of the pump body.
Clearance between the heads of the driven gear teeth:
- Standard: 0.004-0.248 mm (0.0001-0.010 inches)
- Maximum: 0.298 mm (0.012 inches)
5. Check the end clearance of both gears.
- Using a steel ruler and feeler gauge, measure the end clearance of both gears.
End clearance between driving and driven gears:
- Standard: 0.03-0.05mm (0.001 - 0.002 inches)
- Maximum: 0.10 mm (0.004 inches)
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