Toyota Hilux Surf 1993 Owner's Manual page 791

STEERING – Power Steering (Power Steering Pump)
(c) Pull out the bolt and remove the spring seat.
(d) Remove the O–ring from the spring seat.
INSPECTION OF POWER STEERING PUMP
1. INSPECT BUSHING AND MEASURE BUSHING OIL
CLEARANCE
(a) Check the bushing for wear or damage. The bushing
cannot be replaced separately.
If wear or damage is found, replace entire housing.
(b) Check the oil clearance between the bushing and ro–
tor shaft.
Maximum oil clearance: 0.07 mm (0.0028 in.)
2. IF NECESSARY, REPLACE ROTOR SHAFT BEARING
(a) Using snap ring pliers, remove the snap ring.
(b) Using a press, press out the bearing.
(c) Using a press, press in a new bearing.
(d) Using snap ring pliers, install the snap ring.
3. INSPECT ROTOR AND CAM RING
Measure the cam ring thickness. Check that the differ–
ence between the rotor and cam ring measurement is
less than maximum.
Maximum difference: 0.06 mm (0.0024 in.)
If the difference is excessive, replace the cam ring with
one having the same letter as on the rotor.
4. INSPECT AND MEASURE VANE PLATES
(a) Check the vane plates for wear or scratches.
(b) Measure the length, height and thickness of the
vane plates.
Minimum length:
Minimum height:
Minimum thickness: 1.797 mm (0.0707 in.)
(c) Measure the clearance between the vane plate and
rotor groove.
Maximum clearance: 0.03 mm (0.0012 in.)
14.988 mm (0.5901 in.)
8.1 mm (0.319 in.)
SR–59