Oil Pump
OIL PUMP
DISASSEMBLY
1. Remove seal rings by undoing hooks.
2. Loosen bolts in numerical order and remove oil pump cover.
3. Remove inner and outer gear from oil pump housing.
4. Remove O-ring from oil pump housing.
5. Remove oil pump housing oil seal.
INSPECTION
Oil pump housing, oil pump cover, inner gear and outer gear
- Check for wear or damage.
Side clearance
- Measure side clearance between end of oil pump housing and inner and outer gears in at least four places along their circumferences. Maximum measured values should be within specified ranges.
Standard clearance: 0.02 - 0.04 mm (0.0008 - 0.0016 in.)
- If clearance is less than standard, select inner and outer gear as a set so that clearance is within specifications.
Inner and outer gear: Refer to Specifications.
- If clearance is more than standard, replace whole oil pump assembly except oil pump cover.
- Measure clearance between outer gear and oil pump housing.
Standard clearance: 0.08 - 0.15 mm (0.0031 - 0.0059 in.)
- If not within standard clearance replace whole oil pump assembly except oil pump cover.
Seal ring clearance
- Install new seal rings onto oil pump cover.
- Measure clearance between seal ring and ring groove.
Standard clearance: 0.07 - 0.19 mm (0.0028 - 0.0075 in.)
Allowable limit: 0.19 mm (0.0075 in.)
- If not within wear limit, replace oil pump cover assembly.
ASSEMBLY
1. Install oil seal on oil pump housing.
2. Install O-ring on oil pump housing.
- Apply A.T.F. to O-ring.
3. Install inner and outer gears on oil pump housing.
- Take care with the direction of the inner gear.
4. Install oil pump cover on oil pump housing.
a. Wrap masking tape around splines of oil pump cover assembly to protect seal. Position oil pump cover assembly on oil pump housing assembly, then remove masking tape.
b. Tighten bolts in numerical order.
5. Install new seal rings carefully after packing ring groove with petroleum jelly and connect hooks.
- Do not spread gap of seal ring excessively while installing. It may deform the ring.