STEERING — Power Steering (Power Steering Pump) SR-51 INSPECTION AND REPAIR OF POWER STEERING PUMP 1. INSPECT OIL CLEARANCE BETWEEN ROTOR SHAFT AND BUSHING Using a micrometer and calipers, measure the oil clearance. Standard clearance: 0.0028 mm (0.0011 in.) (0.0004 — 0.0012 in.) Maximum clearance: 0.07 mm (0.0028 in.) If the clearance is greater 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 plates. Minimum height: 8.1 mm (0.319 in.) Minimum thickness: 1.797 mm (0.0707 in.) Minimum length: 14.988 mm (0.5901 in.) (b) Using a feeler gauge, measure the clearance between the rotor groove and vane plate. Maximum clearance: 0.03 mm (0.0012 in.) If the clearance is greater than maximum, replace the vane plate and/or rotor with one stamped with the same mark of the cam ring. Inscribed mark: 1, 2, 3, 4 or None HINT: There are five vane plate lengths with the following rotor and cam ring marks: Rotor and cam Vane plate length mm (in.) ring mark None 14.996 — 14.998 (0.5904 — 0.5905) 1 14.994 — 14.996 (0.5903 — 0.5904) 2 14.992 — 14.994 (0.5902 — 0.5903) 3 14.990 — 14.992 (0.5901 — 0.59024) 4 14.988 — 14.990 (0.5901 — 0.5902) 3. INSPECT FLOW CONTROL VALVE (a) Coat fluid to the valve and check that it falls smoothly into the valve hole by its own weight. (b) Check the flow control valve for leakage. Close one of the holes and apply compressed air [4 — 5 kg/cm² {57 — 71 psi, 392 — 490 kPa}] into the opposite side, and confirm that air does not come out of the end hole.