All Except Ford Motor Co.

With belt tension correct, disconnect power steering pump pressure hose, keeping hose end raised to prevent excess fluid loss. Connect pressure hose of power steering pressure gauge to power steering pump fitting. Connect a second pressure hose from valve side of tester to steering gear inlet. Open valve fully and run engine until fluid obtains normal operating temperature. Check fluid level and add fluid if necessary.
Note the pressure reading with the engine idling and the valve open. On all models except Chrysler Corp. FWD, pressure should be 80-125 psi. On Chrysler Corp. FWD models, pressure should be 30-50 psi. If pressure is in excess of 200 psi, check hoses for restrictions and poppet valve (in steering gear) for proper assembly.
On all models, close tester valve fully and re-open 3 times. Record highest pressure noted each time valve is closed. If pressures are within specifications and range of readings is within 50 psi of each other, pump is operating satisfactory.
CAUTION: DO NOT hold valve closed for more than 5 seconds as pump damage may result.
If pressures recorded are high but do not repeat within 50 psi, flow control valve is sticking. If pump performance is to specifications, turn steering wheel to both stops with valve open and note highest pressures. If pump output cannot be met in either side of gear, gear is leaking internally. Shut off engine and remove tester. Reconnect all hoses and recheck fluid level.
CAUTION: DO NOT hold wheel against stops for more than 5 seconds as pump may be damaged.