CB Series Pump

Fig. 5 Exploded View Of CB Series Power Steering Pump:

Fig. 6 Removing Return Tube. CB Series Power Steering Pump:

Disassembly
1. Disconnect battery ground cable, then remove power steering pump from vehicle. Refer to individual car chapters for procedures.
2. Remove union fitting with O-ring and the O-ring seal, Fig. 5.
3. Remove control valve assembly and flow control spring.
4. Protect driveshaft with shim stock and remove driveshaft seal by cutting with small chisel. Discard seal.
5. Remove return tube using tap, nut and washers, Fig. 6, as follows. Plug return tube to prevent chips from entering pump.
a. Stack five 5/8 inch washers onto return tube.
b. Run one 9/16 inch-12 nut midway up a 9/16 inch 12 tap.
c. Install threaded end of tap into return tube until nut is positioned against washers.
d. Using wrench, hold top stationary while turning nut clockwise.
6. Remove end cover retaining ring by inserting punch in access hole.
7. Gently push on driveshaft to assist in removing end cover, O-ring, pressure plate spring, pump ring, pump vanes and the driveshaft subassembly, consisting of pump rotor, thrust plate, driveshaft and shaft retaining ring.
8. Remove O-ring from housing.
9. Remove dowel pins, then the driveshaft seal if not previously removed.
10. Remove pressure plate, pressure plate spring and O-ring from end cover.
11. Remove shaft retaining ring from driveshaft, then the pump rotor and thrust plate.

Inspection
1. Clean all parts in power steering fluid, then dry thoroughly.
2. Inspect pump ring, vanes, thrust plate, pressure plate and driveshaft for scoring, pitting or chatter marks, replacing parts as necessary.

Fig. 7 Installing Rotor And/or Pump Ring. CB Series Power Steering Pump:

Assembly
1. Lubricate new driveshaft seal with power steering fluid and, using seal installer, tool No. J 7728 or equivalent, press driveshaft seal into pump housing.
2. Install pump ring dowel pins into housing.
3. Install thrust plate and pump rotor onto driveshaft, Fig. 7.
4. Install new shaft retaining ring onto driveshaft.
5. Install driveshaft subassembly into housing.
6. Install pump ring, with holes positioned correctly onto dowel pins, Fig. 7, in housing.
7. Install vanes into pump rotor.
8. Lubricate new O-ring (large) with power steering fluid and install O-ring into end cover.
9. Install pressure plate and pressure plate spring.
10. Lubricate new O-ring (small) and install O-ring into end cover.
11. Lubricate outer edge of end cover with power steering fluid and press end cover into housing.
12. Insert retaining ring into groove in housing, with ring opening near access hole opening.
13. Remove plug and any chips, then coat end of new return tube with Loctite solvent 75559 and Loctite 290 adhesive, or equivalents, and press return tube into housing until bottomed.