Steering System - Power: Testing
- With engine off, connect Power Steering Analyzer ((J-25323-A), following manufacturer's instructions. Set parking brake. Open valve on analyzer. Start engine. Leave M/T in Neutral, or A/T in Park. Run engine until power steering fluid is at operating temperature. Check fluid level and add fluid as necessary.
- Measure and record fluid pressure and flow with engine at idle. Pressure should be less than 200 psi (1380 kPa). If pressure is greater, stop engine and check hoses for restrictions.
- Partially close valve on analyzer until pressure is 700 psi (4830 kPa). Measure and record fluid pressure and flow. Subtract flow measurement from that in step 2). Flow should be not less than one Gal./minute (3.8L/minute) less than that recorded in step 2). Repair or replace pump if flow is not as specified.
- Close valve on analyzer, then open and close 3 times. Measure and record highest pressure each time valve is closed. DO NOT leave valve closed longer than 5 seconds for each measurement. If all 3 measurements are not within 50 psi (345 kPa) of each other, replace flow control valve.
- Increase engine speed to 1500 RPM. Measure and record fluid pressure and flow. Subtract flow measurement from that in step 3). Flow should be not less than one Gal./minute (3.8L/minute) less than that recorded in step 3). If flow is less than specified, remove and clean flow control valve. Ensure valve moves freely.
- With engine at 1500 RPM, rotate steering wheel from stop to stop. DO NOT hold wheel against stops for longer than 5 seconds. Flow should drop to less than one Gal./minute (3.8L/minute) at each stop. If flow drop is as specified, problem is not in pump. Check steering gear for leaks.
- Turn off engine. Remove analyzer. Fill and bleed system. See HYDRAULIC SYSTEM BLEEDING .