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NOTE: Pump is not serviceable on Seville.
Disassembly
1) Remove hydraulic union fitting (or VES actuator) from
pump. See Fig. 4. Remove "O" ring, flow control valve assembly and
flow control spring. Insert punch in access hole, and remove end cover
retaining ring. Press gently on pulley end of shaft to remove end
cover, "O" ring, pressure plate spring and pressure plate.
2) Remove shaft subassembly consisting of remaining
components. Disassemble subassembly, noting component location for
reassembly reference. Cut shaft seal with a small chisel. Remove and
discard shaft seal.
Inspection
Inspect pump ring, rotor, vanes, thrust plate, pressure plate
and shaft for scoring, pitting or chatter marks. Replace worn or
damaged parts.
Reassembly
1) Lubricate new shaft seal, "O" rings and all other
components with power steering fluid. Drive new seal into housing with
suitable socket. Assemble shaft subassembly with components in
original locations. Ensure counterbore in center of pump rotor faces
pump pulley.
2) Install shaft subassembly. Install remaining components.
Press end cover in far enough to snap retaining ring into place.
Install flow control valve assembly and related components. Tighten
hydraulic union to specification. See TORQUE SPECIFICATIONS.
Fig. 4: Exploded View Of Power Steering Pump (CB Series)
Courtesy of General Motors Corp.
POWER STEERING PUMP (TC SERIES)
NOTE: Pump is not serviceable on Seville.