Pressure Test

With belt tension correct, disconnect power steering pump pressure hose, keeping hose end raised to prevent fluid loss. Connect pressure hose of gauge to power steering pump fitting and connect second hose from valve side of tester to steering gear inlet.
Open valve and run engine until fluid reaches normal operating temperature of 170°F (77°C). Check fluid level and add if necessary.
NOTE: Power Steering Analyzer D79-33610-A with flow meter is necessary.
Note pressure reading with valve open and engine idling. Pressure should be 80-125 psi (5.6-8.8 kg/cm² ).
Note flow. If flow is less than 2 gals/min. (7.6 L/min.), pump may require repair. At this point, however, continue test.
If pressure is above 150 psi (10.5 kg/cm² ), check hoses for restrictions and poppet valve (Saginaw gears) for proper assembly.
Partially close valve to build pressure up to 740 psi (51.8 kg/cm² ) for Ford pumps and 620 psi (43 kg/cm² ) for Saginaw pumps.
If flow drops below 1.7 gals./min. (6.4 L/min.) for Ford or 1.8 gals./min. (6.8 L/min.) for Saginaw pumps, disassemble pump and replace cam pack.
Increase engine speed to 1500 RPM and record flow.
If pressure is less than specification, replace flow control valve.
If above specifications on Ford, or if flow varies from step 7) reading by more than 1 gal./min. (3.8 L/min.), remove flow control valve and clean or replace.
On all models, with valve open, turn steering wheel all the way from right-to-left stops and record pressure. DO NOT hold wheel against stops more than 5 seconds. Pressure should be the same as recorded in Pressure Test Specifications.
Note that flow should drop 0.5 gal./min. (1.9 L/min.) If pump output cannot be matched in either side of gear, gear is leaking internally and must be overhauled. Shut off engine and remove tester, reconnecting hoses.