Power Steering Gear: Disassembly

With steering gear removed from vehicle, remove lock nuts and tie rod ends. Remove rubber boots and breather tube. Remove hydraulic lines from steering valve and steering housing.
Remove lock nut, adjusting plug, spring and piston from steering housing. Remove pinion dust cap. Using an 11/16" socket, hold pinion from rotating while removing pinion lock nut. Remove dust cover lock ring from upper pinion. See Fig 1 .

Fig 1: Removing Pinion Lock Nut from Pinion Gear & Spool Valve Wrap tape around serrations. Courtesy of Saab-Scania of America, Inc.
Press pinion (with spool valve) out of steering gear. The bearing, support, seal, and dust cover seal will come out with the pinion.
NOTE: Do not use a hammer to remove pinion, or damage to pinion, spool valve and/or housing could result.
Remove inner ball joint furthest from pinion. Clamp rack in a soft-jawed vise. Push plastic sleeve out of the way. Unscrew ball joint.
Remove lock-ring in end of hydraulic cylinder gear housing. Push rack into gear housing as far as it will go. Install Removal/Installer Sleeve (89 96 407 ) over rack. Tighten inner ball joint to press seal housing in.
Use a punch to depress wire end of lock-ring. Using 2 screwdrivers, pry out lock-ring. With ring removed, remove ball joint and special sleeve.

Fig 2: Removing Wire Locking Ring from Steering Gear Housing
Courtesy of SAAB-SCANIA OF AMERICA, INC.
Remove ball joint nearest pinion in same manner as first ball joint. Press out rack together with seal, washer and bushing. Ensure there are no burrs on rack before removing seal and bushing.
Using Seal Remover/Installer (89 96 399 ) and a long punch, remove inner rack. Insert lips of tool under seal. From opposite end of housing, insert long rod and drive out seal.
Remove lock ring and lower pinion bearing. Remove sealing ring and bushing from top of housing.

Fig 3: Removing Inner Rack Seal Using Remover/Installer & Long Rod

Courtesy of SAAB-SCANIA OF AMERICA, INC.