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Power Steering Gears - SAGINAW Ball Bearing Worm & Nut: Overhaul: Reassembly

  1. Lubricate all components before reassembly. Place ball nut on workbench with ball guide holes facing upward and deep side of ball nut teeth toward front edge of workbench. Insert worm shaft into nut so that equal number of shaft threads are visible at each end of nut. Place one ball bearing in each guide hole, then move worm shaft in nut so that ball bearings roll into nut threads and support worm shaft.
  2. Assemble ball guides and place in ball nut. Place equal number of remaining balls into each circuit through holes in ball guides. To ease installation, rotate shaft slightly while inserting ball bearings. Install ball guide clamp and tighten screws. Lubricate wormshaft threads and rotate in and out of ball nut to circulate lubricant.
  3. Install worm shaft bearings in housing and adjuster plug. Install adjuster plug bearing retainer. Lubricate threads of adjuster plug before assembly and wrap tape around worm shaft splines to protect seal during installation. Install worm and nut assembly in housing and tighten adjuster plug hand tight. On American Motors models, pack steering gear housing with chassis grease.
    Fig 1: Checking Sector Shaft End Clearance
    G09354244Courtesy of GENERAL MOTORS COMPANY
  4. Check sector shaft adjusting screw end play. Screw must turn freely and have a maximum of 0.002" end play. Turn worm shaft so ball nut is at center of travel and insert sector shaft. Tape sector shaft splines prior to installation to protect seal. Pack remaining portion of gear with chassis lube (American Motors models) or fill housing with steering gear lubricant meeting GM specification GM4673M (or equivalent).
  5. Install new gasket and side cover on housing by turning adjusting screw into cover counterclockwise. Tighten cover bolts finger tight, then tighten adjuster screw until it bottoms and back off 1/2 turn. Tighten side cover bolts to 30 ft.lbs. Adjust worm bearing preload and sector shaft as previously described.
TIGHTENING SPECIFICATIONS

Application Ft.Lbs.
Gear-to-Frame Bolts (1) 70
Pitman Shaft Nut
  American Motors (2)85
  General Motors 185
Side Cover Bolts 30
Pitman Adjusting Screw Locknut 25
Worm Bearing Adjuster Locknut
  American Motors 50
  General Motors 85
Steering Wheel Nut
  American Motors 25
  General Motors 30
Flexible Coupling Nuts 20
Flexible Coupling Pinch Bolt 30
(1) 30 ft.lbs. for Corvette only.
(2) Stake nut to shaft threads in at least one place.
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