Hydraulic System Test
- With engine off, disconnect pressure hose from pump. Install Power Steering Tester (J-29877-A ) and Adapter (J-33996 ) in hose between power steering pump and steering unit. Gauge must be between shutoff valve and pump. See Fig 1 . Check fluid level.
- Bleed system by holding gauge and hose lower than fluid reservoir with shutoff valve open. Add fluid if needed. Start engine and allow to idle for at least 2 minutes. Check fluid level in reservoir and refill if necessary.
- If after bleeding system steering still malfunctions, start engine. Turn steering wheel from lock-to-lock several times until fluid has reached a temperature of 122°-140° F (50°-60° C). Ensure pressure gauge shutoff valve is open. Have another technician hold steering wheel at lock position for less than 5 seconds.CAUTION: DO NOT hold steering wheel at lock position more than5 seconds. Internal pump damage will result.
- If fluid pressure is greater than 1280 psi (90 kg/cm2
), pump is defective. If fluid pressure is less than 1209 psi (85 kg/cm2
), return front wheels to straight-ahead position. Increase and hold engine speed at 1500 RPM. Close pressure gauge shutoff valve.CAUTION: DO NOT close shutoff valve for more than 5 seconds. Severe pump damage will result.
- Check and record pressure gauge reading. If pressure reading is 1209-1280 psi (85-90 kg/cm2 ), problem is with steering gear box. If reading is less than 1209 psi (85 kg/cm2 ), problem is with pump.