Power Steering - Power-Assisted Recirculating Ball: Overhaul: Disassembly
- Press cover in slightly and remove retaining ring. Remove cover, coil spring and "O" ring. Remove end plate and "O" ring, noting location of pin in one of the small holes in end plate.
- Tilt housing and remove cam ring and rotor. Note that side of rotor with recessed hole faces drive shaft, the rounded off side of rotor faces cam ring, and the cast-in half arrow indicates direction of rotor rotation.
- Remove drive end face plate and "O" ring. If it should be necessary to remove input shaft, proceed as follows: Remove pulley, shaft seal, and snap ring from housing. Remove circlip and press ball bearing off of shaft. Using a mandrel, press bearing sleeve out of housing.
- Remove plug from pressure valve bore, then remove coil spring and valve piston. Note that threaded section on valve piston faces coil spring.CAUTION: Do not alter length of coil spring or thickness of plug sealing ring.
- The valve tolerance group (1 or 2) is stamped into housing adjacent to pressure valve bore and valve barrel should be scribed with one or two marks (lines) agreeing with group number stamped into housing.CAUTION: If valve must be replaced, install valve of same tolerance group.
- Clean and inspect all parts. Clean restrictor insert in pump outlet passage. Valve piston may be disassembled for cleaning.CAUTION: When disassembling piston, do not clamp across the sliding surfaces.
A pressure valve is located inside valve piston (flow limit valve), and thickness of washers determines cut-in range of pressure valve. Maximum pump pressure should not be more than 10% below the value stated on manufacturer's plate attached to pump.