Pressure Testing

NOTE: Before testing power steering system, check fluid level, belt tension, pump pulley, tire pressure and engine idle speed.

Remove high pressure line from pump and attach Adapter Fitting (J-5176-11) to pump. Using Pressure Gauge (J-5176-02) and Adapter (J-5176-12), connect gauge to hose. Open valve fully. Run engine until fluid reaches normal operating temperature. Check fluid level and add as necessary. With engine at operating temperature, pressure reading should be 80-125 psi (5.6-8.8 kg/cm² ).
If pressure is more than 200 psi (14 kg/cm² ), inspect system fro restrictions or faulty poppet valve. Alternately close and open gauge valve fully 3 times while recording highest pressure obtained.
CAUTION: DO NOT hold valve closed for more than 5 seconds, as pump damage may result.
If recorded pressures are all within 50 psi (3.5 kg/cm² ), pump is okay. If pressures are high and not within 50 psi (3.5 kg/cm² ) of each other, flow control valve is sticking.
If pressures are constant and more than 100 psi (7.0 kg/cm² ), but less than 1350 psi (94.9 kg/cm² ), replace flow control valve and retest pump pressure.
If pump meets specification, leave valve open. Turn steering wheel from stop to stop. Record and compare highest pressure with maximum pump pressure.
If pressure at both stops is not similar to maximum pressure, steering gear is leaking internally.