Description & Operation

Power steering gear unit combines gear and valve housing into a one-piece aluminum die casting. Quick-connect fittings are used for pressure and return lines. Fittings are designed to swivel and should not be overtightened.

A hydraulic-mechanical unit with an integral piston and rack provides power-assisted steering control. Internal valving directs pump flow and controls pressure. Unit contains a rotary fluid control valve and a boost cylinder integrated with gear rack.

Three types of power steering pumps are used. See POWER STEERING PUMP APPLICATIONS  . Ford C-III pumps are vane type pumps. Manufacturers do not recommend service of these pumps. If service is required, replace pump as an assembly. The Ford C-II pump is a 10-slipper type with spring loaded slippers within cam and rotor creating pumping action. A flow control relief valve maintains pump volume and pressure. Ford C-II power steering pump may be overhauled or replaced as an assembly. See POWER STEERING PUMP OVERHAUL  .

Some applications use a reservoir located on power steering pump. Dipstick is located at pump reservoir fill cap. Other applications incorporate secondary reservoir on fender apron connected to pump by a hose. Fluid level measurements are marked on body of secondary reservoir. All pump types incorporate swivel pressure fittings. An identification tag attached to reservoir body indicates pump model. Use model code when ordering service parts. Some differences in internal components exist.