Oil Pump Inspection

OIL PUMP INSPECTION




1. Measure the clearance between the inner rotor and the outer rotor using a feeler gauge.
- If it exceeds the maximum specification, replace the inner rotor or outer rotor, or both.

Tip clearance between inner rotor and outer rotor
Standard: 0.02-0.18 mm {0.0008-0.0070 in}
Maximum: 0.20 mm {0.0079 in}




2. Measure the clearance between the outer rotor and the oil pump body using a feeler gauge.
- If it exceeds the maximum specification, replace the outer rotor or oil pump, or both.

Body clearance between outer rotor and oil pump body
Standard: 0.090-0.175 mm {0.0036-0.0068 in}
Maximum: 0.20 mm {0.0079 in}




3. Measure the side clearance using a straight edge and feeler gauge.
- If it exceeds the specification, replace the inner rotor, outer rotor, oil pump, or all of them.

Oil pump side clearance
Standard: 0.03-0.07 mm {0.0012-0.0027 in}
Maximum: 0.090 mm {0.0035 in}




4. Measure the weight at which the plunger spring height is compressed to 35.42 mm {1.394 in} using a spring tester.
- If it exceeds the specification, replace the plunger spring.

Weight at which the plunger spring height is compressed to 35.42 mm {1.394 in} 62.5-68.9 N {6.38-7.02 kgf, 14.1-15.4 lbf}