Flexible Coupling; Power Steering Pump; Adjusting Pitman Shaft Preload - Pontiac Grand Prix Service Manual

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PONTIAC SERVICE MANUAL
following torque readings, take reading pulling torque
wrench to right 1/2 turn and reading pulling torque
wrench to left 1/2 turn each side of center (high point).
Total both readings and take one-half of this total as
average torque.
Use a 3/4"-12 point deep socket and pound-inch
torque wrench (Fig. 9-79), take a reading through
center (high point) position to determine total drag,
thrust bearing adjustment, and rack and worm pre-
load. Adjust lash adjuster so torque is 4.0 to 8.0 in. Ib.
in excess of total reading found above.
Total over center (high point) preload must not exceed
18 Ib. in. torque. Tighten lash adjuster lock nut to 25
Ib. ft. torque. Recheck preload after lock nut has been
tightened.
FLEXIBLE COUPLING
INSTALL
1. Install coupling on stub shaft aligning flat surface
on the stub shaft serrations with flat section in flange
hole.
2. Install coupling clamping bolt and tighten to 30 Ib.
ft. torque.
NOTE:
Be sure to position coupling so that it clears
end of adjuster plug by approximately
3 4 6 '
and
rotates without interference with adjuster plug.
STEERING GEAR
INSTALL
1. Position steering gear assembly in car, aligning large
head rivet in widest upper flange opening (Figs. 9-12,
9-80,9-81,9-82 and 9-83).
NOTE: Metal-to-metal contact between flanges on stub
shaft assembly and steering shaft assembly will transmit
and amplrfi gear noise to the driver.
2. Install steering housing to frame bolts finger-tight.
Shift gear assembly to obtain best alignment with
flange on steering shaft. Tighten housing to frame
bolts to 70 Ib. ft. torque.
3. Install pitman arm and secure with lock washer and
nut. Tighten nut to 140 Ib. ft. torque.
4. Connect pressure and return hose assemblies to gear
assembly and tighten to 25 Ib. ft. torque.
5. Install two flange flexible coupling attaching nuts
and lock washers and tighten to 20 Ib. ft. torque.
6.
Check fluid level in pump reservoir. Fluid should be
.
up to oil level mark in reservoir. Add GM power
steering fluid or equivalent as necessary. DO NOT use
type "A" automatic transmission fluid, except in an
emergency if power steering fluid is not available.
With front wheels off floor, start engine and bleed
hydraulic system by manually steering through cycle
several times until there is no evidence of air bubbles
in reservoir. Recheck fluid level and lower car.
POWER STEERING PUMP
GENERAL INFORMATION
No periodic service of the pump is required except
checking oil level in reservoir as outlined in GEN-
ERAL LUBRICATION Section.
ADJUSTMENT PROCEDURES
ADJUST PUMP BELT TENSION
1. Loosen pump plate (support) to bracket bolts two
full turns.
2. Tighten belt with power steering pump to give 103
Ibs. as indicated on Burroughs gage for used belt and
143 lbs. for new belt.
3. Holding adjustment, tighten pump plate to bracket
bolts.
PUMP PRESSURE TEST
1. Disconnect pressure hose at union on pump, use a
small container to catch any fluid which might leak.
Fig. 9-79 Adjusting Pitman Shaft Preload
2. Connect a spare pressure hose to pump union.