Oil Pump

SST:

Preparation




Disassembly / Inspection / Assembly
1. Disassemble in the order shown in the figure, referring to Disassembly Note.
2. Inspect all parts and replace as necessary.
3. Assemble in the reverse order of disassembly, referring to Assembly Procedure.

Disassembly note




Oil pump cover
1. Gradually loosen the mounting bolts in the order shown.
2. Remove the oil pump cover from the oil pump housing.




Rotor

CAUTION: Do not use a punch to mark the rotor and cam ring.

1. Mark the rotor and cam ring.
2. Remove the rotor and vanes from the cam ring.




Pivot pin

CAUTION: Do not scratch the oil pump housing.

1. Wrap a screwdriver with tape.
2. Hold the cam ring and remove the pivot pin.




Cam ring

CAUTION:
- Do not scratch the oil pump housing.
- Hold the cam ring spring to prevent it from popping out.
Remove the cam ring and spring.

Inspection




Oil pump cover
1. Fit a new seal rings into the oil pump cover.
2. Measure the clearance between the seal ring and the ring groove.

Standard clearance: 0.10 - 0.25 mm (0.004 - 0.010 in)
Maximum clearance: 0.25 mm (0.010 in)

3. It not within specification, replace the oil pump assembly.




Oil pump housing, cam ring, rotor, vane, and control piston

NOTE: Do not Install the friction ring, O-ring, control piston, side seals, and cam ring spring.

1. Install the cam ring, vanes, rotor, and control piston.
2. Measure the distance from the edge of the oil pump housing to the cam ring, rotor, vanes, and control piston at least four points along their circumferences.




Clearance

3. If not within specification, replace the oil pump assembly.

Cam ring spring




1. Measure the spring free length.

Specification:

Specification

2. If not correct, replace the cam ring spring.

Assembly procedure




1. Apply ATF to the lip of a new oil seal, and Install it by using the SST.




2. Apply ATF to side seals, and Install them on the control piston with the black surface facing the control piston.
3. Install the control piston and pivot pin.




4. Apply petroleum jelly to the cam ring groove and Install a new O-ring and friction ring into the cam ring.
5. Install the cam ring and spring while compressing the spring against the oil pump housing.






CAUTION: Do not scratch the oil pump housing.

6. Wrap a screwdriver with tape.
7. Hold the cam ring and Install the pivot pin.




8. Confirm that the mark on the rotor is facing upward, and Install the rotor, vanes, and vane rings.

CAUTION: Do not damage the oil seal by the splines of the oil pump cover.

9. Install the oil pump cover onto the oil pump housing.




10. Tighten the bolts evenly and gradually in the order shown.

Tightening torque: 16 - 20 N.m (1.6 - 2.1 kgf.m, 12 - 15 ft.lbf)

CAUTION: Do not overexpand the seal rings when Installing them.






NOTE:
- Press the seal rings down into the petroleum jelly to hold them.
- Seal rings come in two different diameters.

Small dia.: No mark
Large dia.: Yellow mark in area shown by arrow

11. Apply petroleum jelly into the ring grooves, and Install new seal rings.
12. Apply ATF to a new O-ring and Install it onto the oil pump.




13. Apply petroleum jelly to the bearing and set it on the oil pump.

Bearing outer diameter: 47.0 mm (1.850 in)