Toyota 4Runner: Reassembly

Toyota 4Runner Service Manual / Steering / Power Assist Systems / Vane Pump / Reassembly

REASSEMBLY

CAUTION / NOTICE / HINT

NOTICE:

When installing parts, coat the parts indicated by arrows with power steering fluid (See page ).

PROCEDURE

1. INSTALL VANE PUMP HOUSING OIL SEAL

(a) Coat the lip of a new vane pump housing oil seal with MP grease.

(b) Using SST and a press, press in the oil seal.

SST: 09950-60010

09951-00280

SST: 09950-70010

09951-07100

NOTICE:

Make sure that the oil seal is installed facing in the correct direction as shown in the illustration.

2. INSTALL VANE PUMP SHAFT WITH VANE PUMP PULLEY

(a) Coat the inside surface of the bushing in the vane pump front housing with power steering fluid.

(b) Gradually insert the vane pump shaft with vane pump pulley.

Text in Illustration

*1	Protective Tape

NOTICE:

Do not damage the lip of the oil seal in the vane pump front housing.
Wrap protective tape around the spline of the vane pump shaft with vane pump pulley in order to prevent damage to the oil seal.

3. INSTALL VANE PUMP FRONT SIDE PLATE

(a) Coat a new O-ring with power steering fluid and install it to the vane pump front housing.

(b) Coat a new O-ring with power steering fluid and install it to the front side plate.

(c) Align the notch of the front side plate with the notch of the vane pump front housing and install the front side plate.

Text in Illustration

Align

NOTICE:

Make sure that the front side plate is installed facing in the correct direction.

4. INSTALL VANE PUMP CAM RING

(a) Align the notch of the cam ring with the notch of the front side plate and install the cam ring with the inscribed mark facing upward.

Text in Illustration

*a	Align
*b	Inscribed Mark

NOTICE:

Make sure that the cam ring is installed facing in the correct direction.

5. INSTALL VANE PUMP ROTOR

(a) Install the vane pump rotor.

HINT:

The vane pump rotor can be installed with either side facing up.

(b) Coat the 10 vane pump plates with power steering fluid.

Text in Illustration

*a	Round End
*b	Outward

NOTICE:

Make sure that the vane pump plates are installed facing in the correct direction.

6. INSTALL VANE PUMP SHAFT SNAP RING

(a) Using a screwdriver and snap ring expander, install a new shaft snap ring to the vane pump shaft.

NOTICE:

Do not expand the shaft snap ring any further than needed.
Make sure that the shaft snap ring fits completely into the groove.
Do not damage the vane pump rotor and shaft.

7. INSTALL VANE PUMP REAR HOUSING

(a) Coat a new O-ring with power steering fluid and install it to the rear housing.

(b) Align the straight pin of the rear housing with the notches of the cam ring, front side plate and vane pump front housing.

Text in Illustration

Align

NOTICE:

Make sure that the O-ring is not protruding from anywhere when installing the vane pump rear housing.

Torque:

22 N·m {224 kgf·cm, 16 ft·lbf}

8. SECURE VANE PUMP ASSEMBLY

9. INSPECT TOTAL PRELOAD

(a) Check that the pump rotates smoothly without abnormal noise.

(b) Temporarily install a service bolt.

Recommended Service Bolt:

Item	Value
Thread diameter	10 mm (0.394 in.)
Thread pitch	1.25 mm (0.0492 in.)
Bolt length	50 mm (1.97 in.)

Text in Illustration

*a	Service Bolt

Standard rotating torque:

0.3 N*m (3 kgf*cm, 2 in.*lbf) or less

If the rotating torque is not as specified, check the vane pump housing oil seal.

10. INSTALL SUCTION PORT UNION

(a) Coat a new O-ring with power steering fluid and install it to the suction port union.

(b) Install the suction port union to the vane pump with the bolt.

Torque:

12 N·m {122 kgf·cm, 9 ft·lbf}

Inspection

INSPECTION PROCEDURE 1. INSPECT VANE PUMP SHAFT AND BUSH IN VANE PUMP FRONT HOUSING (a) Using a micrometer, measure the outer diameter of the vane pump shaft. Text in Illustration ...

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