Pressure Test

Note pressure reading with valve open and engine idling. Pressure should be 80-125 psi (5.6-8.8 kg/cm² ).
If pressure is above 200 psi (14.1 kg/cm² ), check hoses for restrictions and poppet valve (Saginaw gears) for proper assembly.
Close gate valve completely and reopen 3 times. Record highest reading each time. DO NOT close valve for more than 5 seconds. If pressure is less than specification, clean or replace flow control valve in pump. If pressures are still low, replace pump.
If readings are within specifications and within 50 psi (3.5 kg/cm² ) of each other, pump is operating properly. See Pressure Test Specifications table. If pressures are high, but do not repeat within 50 psi (3.5 kg/cm² ), flow control valve in pump is sticking. Remove flow control valve and clean or replace.
If pump checks within specifications, open valve and 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 specified. See in Pressure Test Specifications table.
If pressure is low, steering gear is leaking internally and must be overhauled.

NOTE: If problem still exists, check ball joints, linkage, and other front suspension members.