238—STEERING
CHRYSLER SERVICE MANUAL
cleaning- solvent. Inspect roller tooth shaft,
shaft serrations, bearings, bearing cups, oil
seals,
worm and tube for wear, nicks and flat
spots.
Replace with new parts as necessary.
Remove roller tooth assembly shaft cover ad-
justing screw nut and locking plate. Check ad-
justing screw threads in cover and on adjusting
screw. Replace if necessary.
5.
ASSEMBLY OF STEERING
GEAR
—
(Unit Removed from Car)
NOTE
When the steering gear assembly is disassem-
bled, it is advisable to install new seals and gas-
kets to insure against oil leaks.
If either of worm thrust tapered roller bear-
ings are damaged, it is advisable to replace
both bearings. After thoroughly cleaning all
parts,
assemble parts without any lubrication.
Lubrication should be done after adjustments
have been completed. If bushings or needle
bearings have been removed, press new bush-
ings or needle bearings into place. Use new
oil seals.
Insert worm and tube into housing with
bearings and cups in proper order, as shown
in Figure 2. Install shims and lower housing
cover, making sure that bearings are seated in
cups before tightening screws. Tighten cover
screws evenly, turning worm tube at intervals
to be sure no bind occurs. Final tightening of
screws should cause end play to just disappear
with torque required to rotate wheel % to %
of a pound, when measured with pull applied
at rim of wheel. If bind in rotation of tube oc-
curs when cover screws are fully tightened, it
will be necessary to add shim thickness until
bind just disappears. If end play is present
after final tightening, less shim thickness is
required. Shims are available in .003, .006, .011
and .025 inch. By using a micrometer to meas-
ure shims, the proper combination can be
chosen.
(Refer to Figs. 1 and 2.) Install roller shaft
bearing in housing. Before installing cover,
turn adjusting screw all the way out (counter-
clockwise). When roller shaft assembly is com-
pletely installed, with exception of steering
gear arm, adjust as follows:
WORM BEARING ADJUSTING SHIMS
ADJUSTING SCREW
ADJUSTING SCREW
LOCK PLATE
LOCK PLATE NUT
54x46
Fig.
2—Steering Gear Adjustments
Place steering wheel on tube and rotate
wheel in either direction to end of its travel.
Rotate in opposite direction to end of travel
while counting the turns. Rotate the wheel
back 14 the full number of turns. This is center
of travel (mid-travel or high point). Turn ad-
justing screw in (clockwise) until all end play
in roller shaft disappears. Roll wheel back and
forth several times. There should be no bind.
Rotate wheel to one of ends of travel and apply
a spring scale or torque wrench. With pull ap-
plied at rim of wheel, tension should measure
from one to two pounds. Rotate wheel back to
center and on past center position. The greatest
tension should be felt as wheel is rotated
through center position. Adjust bearing load by
turning adjusting screw in or out of cover, as
required. Install lockplate, nut, and steering
gear arm. Fill gear housing with SAE 90 Fluid
Gear Lubricant. Rotate wheel back and forth
through its full travel several times to be sure
all parts are fully lubricated and check for
leaks.
6. ADJUSTING WORM BEARINGS (In Car)
Rotate steering wheel to extreme right or left
and turn back 14 turn. Press finger at joint
between bottom of steering wheel hub and
shell. Have another mechanic shake front
wheels hard sideways, but not enough to turn
steering wheel. Any end play in worm bear-
ings can be felt at steering wheel hub. There
should be no end play at hub. End play should
not be confused with clearance between roller
and worm. If any excessive end play exists,
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