Hydraulic System Testing
CAUTION:
DO NOT leave shut-off valve closed more than 15 seconds. Pump may be damaged.
CAUTION:
DO NOT hold steering wheel at lock position more than 5 seconds. Fluid temperature will increase sharply.
- With engine off, disconnect pressure hose from pump. Using an extra hose, install Gauge (J-29877 ) and shut-off valve in hose.
- If using another pressure gauge, gauge capacity should exceed 1250 psi (88 kg/cm2 ). Pressure gauge must be connected between valve and pump.
- Bleed system by holding gauge beneath fluid reservoir with shut-off valve open. With engine idling, check fluid level in reservoir. Refill (if necessary).
- Turn steering wheel from lock-to-lock several times until fluid has reached a temperature of 122°-140° F (50°-60° C).
- With engine running at 1500 RPM and with valve closed, fluid pressure must be between 1085-1210 psi (77-85 kg/cm2 ). If not, oil pump is malfunctioning.
- If pressure is to specification, open valve fully to test steering gear assembly. With engine running, turn steering gear lock-to-lock. Note oil pressure.
- If steering gear is functioning properly, pressure will be between 1085-1210 psi (77-85 kg/cm2 ). If not, overhaul the steering gear.