Pontiac tempest 1968 Service Manual page 587

9-30
1968 P O N T I A C SERVICE MANUAL
F i g . 9-51 Removing Adjuster Plug Assembly
REMOVE ADJUSTER PLUG ASSEMBLY,
ROTARY VALVE WITH WORM SHAFT
AND PIN ASSEMBLY AS AN INTEGRAL UNIT
1. Remove flexible coupling locking bolt and re­
move coupling.
2. Remove adjuster plug lock nut, using punch or
suitable spanner wrench such as J 7624.
3. Remove adjuster plug assembly, using a span­
ner as shown in Fig. 9-51.
4. Push on end of worm shaft with a hammer
handle while pulling on stub shaft with slight rotary
motion. This will remove the entire upper unit.
5. Remove adjuster plug from rotary valve and
torsion bar by pulling straight out (Fig
0
9-52).
6. Separate worm shaft and valve assembly by
pulling apart.
7. Remove lower bearing and discard torsion bar
. ADJUSTER PLUG ASSEMBLY
ROTARY VALVE ASSEMBLY
STEERING W O R M
ROTARY V A L V E
ASSEMBLY
T O R S I O N BAR C A P
T O W O R M " O " RING
/ LOWER THRUST
STEERING W O R M BEARING RACES
cap to worm O-ring seal (in the Rotary Valve). See
Fig. 9-52.
8. Remove lower bearing races and bearing (these
parts may come out with worm shaft or remain in
housing).
9. Remove adjuster plug O-ring seal and discard.
DISASSEMBLE PITMAN SHAFT GEAR
AND SIDE COVER
1. Hold lash adjuster with 7/32" alien wrench and
remove lash adjuster nut and discard.
2. Screw lash adjuster out of side cover.
NOTE: Do not disassemble pitman shaft and com­
ponent parts as these are serviced as an assembly
(Fig. 9^53).
DISASSEMBLE RACK-PISTON NUT
1. Place the rack-piston nut assembly on a clean
cloth.
2. Remove arbor tool J 7539 ball return guide, and
balls, making sure all of the balls are caught on the
cloth (11 bright and 11 black).
3. Remove and discard Teflon ring and back-up
seal from rack-piston nut.
DISASSEMBLE ROTARY VALVE OR REPLACE
VALVE SPOOL DAMPENER O-RING—(REPLACE O-RING
ONLY IF NECESSARY DUE TO "SQUAWK" IN GEAR)
The rotary valve assembly includes the valve body,
valve spool and the stub shaft assembly. All these
parts are precision units and are hydraulic ally bal­
anced at the factory.
Under no conditions are parts in this unit to be
replaced or interchanged with other parts or units.
/PITMAN SHAFT GEAR
' LASH ADJUSTER SPRING
LASH ADJUSTER
SPRING THRUST WASHER
LASH ADJUSTER THRUST WASHER"
LASH ADJUSTER RETAINER'
F i g . 9-52 Adjuster Plug and O Ring Removal
F i g . 9 - 5 3 Parts in End of Pitman Shaft G e a r -
D O N O T DISASSEMBLE