Sable V6-183 3.0L DOHC VIN S MFI (1997)
Power Steering Pump: Testing and Inspection
Flow and Pressure Test
Prechecks
DESCRIPTION
Before performing pump flow and pressure test, complete the following checks for conditions which could cause loss of power assist or cause
excessive loading to the power steering system. Take corrective action if necessary.
PROCEDURE
1. Check power steering pump reservoir for proper fluid level.
2. Check tires for correct air pressure.
3. Check drive belt for proper tension.
4. Check power steering pump for correct model and vehicle application.
5. Check for correct size power steering pump pulleys on power steering pump and engine.
6. Check entire system for damage. Replace parts, if necessary.
7. If the above items are correct or have been corrected and the loss of assist still exists, test power steering pump flow and pressure to determine
whether the trouble is in the power steering pump, power rack and pinion steering gear or hoses.
Procedure
1. Loosen power steering hose bracket at rear of engine.
2. Disconnect the power steering pressure hose from the power steering pump and connect it into the appropriate hose adapter of the Rotunda Power
Steering System Analyzer 014-00207 or equivalent.
3. Thread the adapter into the rack and pinion steering gear.
4. Connect the analyzer hoses to the adapters. Tighten both connections to 20 Nm (15 ft. lbs.) maximum.
5. Add power steering fluid to the system. START the engine and run it for approximately two minutes at idle.
6. Record the following:
a. Flow, liters/minute (gallons/minute) at 78° +/- 2° C (172° +/- 5° F).
b. Pressure, kPa (psi) at 78° +/- 2° C (172° +/- 5° F) at idle with the gate valve fully open.
1. If flow is below 5.7 liters/min. (1.5 gallons/minute), the power steering pump may require replacement. However, at this point, continue
the diagnosis. Check for flow and relief pressure.
2. If pressure is above 1034 kPa (150 psi) check hoses for restrictions.
7. Partially close the gate valve to build up 5100 kPa (740 psi). Observe and record flow. Flow should be liters/minute (gallons/minute) at 78° +/- 2°
