Inspect the relief plunger.
Coat the plunger with engine oil and check that it falls smoothly into the plunger hole by its own weight.
If it does not, replace the relief plunger. If necessary, replace the front case.
Inspect the relief valve spring.
Inspect for distorted or broken relief valve spring.
Standard value
Free height : 58.3 mm (2.2952 in)
Load :
6.19 ± 0.62 kg / 39.5 mm (60.7 ± 6.1 N / 1.5551 in)
9.48 ± 0.95 kg / 29.5 mm (93.0 ± 9.3N / 1.1614in)
Inspect the rotor side clearance.
Using a vernier calipers measure the diameter of outer rotor.
Standard diameter
46.781 ~ 46.820 mm (1.8417 ~ 1.8433 in)
Using a vernier calipers measure the diameter of cylinder block oil pump hole.
Standard diameter
47.000 ~ 47.039mm (1.8503 ~ 1.8519in)
Calculate the difference between the outer rotor and the cylinder block hole.
Standard clearance :
0.180 ~ 0.258mm (0.0071 ~0.0102in)
Inspect the rotor width clearance.
Using a vernier calipers measure the width of outer rotor.
Standard width
15.96 ~ 15.98mm (0.6283 ~ 0.6291in)
Using a vernier calipers measure the diameter of cylinder block oil pump hole.
Standard width
16.02 ~ 16.05 mm (0.6307 ~ 0.6319 in)
Calculate the difference between the outer lotor and the cylinder block hole.
Standard clearance :
0.040 ~ 0.090 mm (0.0015 ~ 0.0035 in)
