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STEERING
1 9-2 1
1
64
x
621
Fig.
P L A d j u s t i n g the Steering
Gear
Mesh
justing screw in this position, tighten the lock nut
(Fig. 20).
NOTE: This is a temporary adiustment to bring the
piston rack and sector teeth in full alignment.
(b) Operate the unit through its full travel several
times to align piston rack and sector teeth.
(c) With the gear on center, readjust the sector
shaft backlash. This will require loosening the adjust-
ing screw until backlash is evident. Then retighten
the adjusting screw until the backlash just disappears.
Continue to tighten for 3/8 to
1/2
turn from this posi-
tion and tighten the lock nut to 50 foot-pounds to
maintain this setting.
(d) Starting from a point at least one full turn of
the wormshaft either side of center, the torque at the
sector shaft required to turn the unit through
ten-
ter at 2 rpm in each direction shall not exceed 25
foot-pounds or vary more than 5 foot-pounds from
left to right. Perform this operation carefully to pre-
vent a lockup in the steering gear.
(e) Adjust the torque evenly by moving the steer-
ing valve assembly.
NOTE: If the torque
is
greater
to
the left, move
the control valve body down. If the torque
is
greater
to the right, move the valve body up. After posi-
tioning the valve to obtain equal torque, tighten
valve body attaching screws to
200 inch-pounds to
maintain this setting.
(f)
With the gear at or near the full turn in either
direction, attempt to return the unit to center by
applying a torque wrench at the steering gear shaft.
Hold the wormshaft until the cross shaft torque builds
up to 50 foot-pounds. Release the wormshaft and
maintain a constant steady pull on the gear shaft
(turning cross shaft slowly). If the cross shaft torque
does not drop to
25
foot-pounds maximum as the unit
passes through center, check for too much interior
drag; binding valve lever, binding spool valve, or
cross shaft adjustment that is too tight.
(6)
With the unit under power, but with no load,
the torque required to rotate the wormshaft through
an included angle of 180" (90' either side of center)
shall be 6-10 inch-pounds. Disconnect the test equip-
ment and mounting fixture and install the unit in the
vehicle
.
GEAR INSTALLATION
Six Cylinder Models:
(1) On vehicles equipped with six cylinder engines,
enter the steering gear at the engine compartment.
On
eight cylinder equipped vehicles, enter the
steer-
ing gear from below with the gear shaft end of the
steering gear first, then roll the gear up into posi-
tion between the frame and the engine.
DO NOT
damage the automatic transmission oil cooler lines on
vehicles so equipped.
(2) Install the steering gear housing retaining bolts
and tighten to 55 foot-pounds, on AV1, and AR1 mod-
els, and
80
foot-pounds on AP1 models.
(3) Install the starting motor.
(4)
Position the steering gear in center of high spot,
the worm master spline should be at 12 o'clock, and
install the steering gear arm, washer and nut. Tighten
nut to 120 foot-pounds.
(5) Connect the hydraulic hoses to the steering
valve.
(6) Position the clamp on the steering shaft cou-
pling and with the master spline on the wormshaft
and notch on the body of the coupling aligned, en-
gage the column coupling with the steering gear worm-
shaft.
(7) Install the coupling clamp bolt and tighten the
bolt to 33 foot-pounds.
( 8 )
Position the steering jacket assembly so the
steering shaft coupling is centered at the midpoint of
up and down travel.
NOTE: On ARl and A V l Models
a
' / 1 G "
gauge hole
is provided in the steering column shaft. When the
dimension from the top
of
the coupling
to
the cen-
terline
of
the gauge hole is
inch, the coupling is
centered in its travel. On A V l models with manual
transmission and power steering measure
' 1 1 6
inch
between the top of the coupling and the bottom of
the dust seal. On APl models when the bottom
edge of the gauge hole is tangent to the top edge of
the seal the coupling
is
centered in its travel.
(9) With the coupling centered, tighten the column
jacket to the instrument panel clamp bolts to 95 inch-
pounds.
(10) Connect the ground cable to the battery.
(11) Start the engine, turn the steering wheel to
right and left several times to expel the air from the
system.
(12) Inspect the power steering pump reservoir lev-
el, replenish as necessary.
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