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19-2
STEERING
SERVICE PROCEDURES
Adjustments
Two adjustments are provided in the steering gear
(Figs.
2
and
3).
The worm bearing preload adjustment,
and the ball nut rack sector gear mesh adjustment.
Before the correct adjustment can be made at the
ball nut rack and the sector gear, it must be deter-
mined that the
worm
bearing pre-load is properly ad-
justed.
The worm bearing pre-load adjustment is controlled
by the worm thrust bearing adjuster which threads
into the housing at the upper end of the wormshaft.
The cross shaft is integral with the sector gear and
the sector gear meshes with the rack teeth on the
re-
circulating ball nut. Adjustment at this point is con-
trolled by the cross shaft adjusting screw which ex-
tends through the housing cover.
Worm Bearing Pre-load
shaft with Tool
C-3646
(Fig.
4).
(1) Disconnect the steering gear arm from the cross
(2)
Remove the horn button or horn ring.
(3) Loosen the cross shaft adjusting screw lock nut,
and back out the adjusting screw approximately two
turns. This will relieve any friction load which may be
present at the closely meshed ball nut rack and sector
gear teeth.
(4)
Turn the steering wheel two complete turns
/STEERING
SHAFT
DIE-CAST
A -
/ALUMINUM
HOUSING
~
B
A
L
L
BEARINGS
UNIVERSA
COUPLING
CROSS SHAFT
GEAR CLEARANCE
ADJUSTING SCREW
I H~ilM%'l/
\
'WORM
SHAFT
'
RECIRCULATING-
BALL NUT
CROSS SHAFT
62x458
Fig. 1-Steering
Gear Cross Section
C R O S S SHAFT
FILLER P L U G
Fig. 2-Gear
Adjustment locations-
A R I , AR2, A V l and AV2 Models
from the straight ahead position, and place the torque
wrench Tool
C-3380
on the steering shaft nut.
( 5 )
Rotate the steering shaft at least one turn to-
ward the straight ahead position, while testing the ro-
tating torque with the torque wrench.
The torque required to keep the wheel moving
FILLER PLUG
Fig. 3-Gear
Adjustment Locations
APl and AP2 Models
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