Envoy 2WD V6-4.3L VIN W (1998)
Installing The Balls In The Rack Piston
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The rack piston (26) will be forced onto J 21552 and hold the rack piston balls (25) in place.
4. Rack piston (26), rack piston balls (25), and J 21552 together from housing (20).
5. Valve.
6. Worm shaft (13).
7. Thrust bearing (16) and races (15).
8. J 21552 from rack piston (26).
9. Rack piston balls (25).
10. Screws (21), clamp (22) and ball guide (23).
11. Teflon ring (5).
12. O-ring seal (6).
Clean
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All disassembled parts.
Inspect
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All disassembled parts for wear. Replace if necessary.
ASSEMBLE
1. O-ring seal (6) and teflon ring (5) and lubricate with power steering fluid.
2. Worm shaft (13) to rack piston (26) outside of housing (20).
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Fully seat worm shaft (13) to rack piston (263 and align worm shaft spiral groove with rack piston ball return guide hole.
NOTE: Make sure that all rack piston balls (25) are reinstalled in the rack piston. Improper rack piston ball installation may result in personal
injury.
CAUTION: The black rack piston balls are smaller than the silver balls. The black and silver balls must be installed alternately into the rack
piston and ball guide to maintain rack piston to worm shaft preload.
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Lubricate rack piston balls (25) with power steering fluid.
Placing Balls In The Ball Return Guide
