Power Steering Pump Inspection - Toyota Hilux Surf 1993 Owner's Manual

SR–50
STEERING – Power Steering (Power Steering Pump)
INSPECTION OF POWER STEERING PUMP
1. CHECK OIL CLEARANCE OF SHAFT AND BUSHING
Using a micrometer and calipers, check the oil clearance.
Standard clearance:
Maximum clearance: 0.07 mm (0.0028 in.)
If more than maximum, replace the entire PS pump.
2. INSPECT ROTOR AND VANE PLATES
(a) Using a micrometer, measure the height, thickness
and length of the vane plate.
Minimum height:
Minimum thickness: 1.797 mm (0.0707 in.)
Minimum length:
(b) Using a feeler gauge, measure the clearance be–
tween the rotor groove and vane plate.
Maximum clearance: 0.03 mm (0.0012 in.)
If more than maximum, replace the vane plate and/or ro–
tor with one having the same mark stamped on the cam
ring.
Inscribed mark: 1, 2, 3, 4 or None
HINT: There are five vane lengths with the following ro–
tor and cam ring marks:
Rotor and cam
ring mark
3. INSPECT FLOW CONTROL VALVE
(a) Coat the valve with power steering fluid and check
that it falls smoothly into the valve hole by its own
weight.
0.01–0.03 mm
(0.0004 – 0.0012 in.)
8.1 mm (0.319 in.)
14.988 mm (0.5901 in.)
Vane length mm (in.)