Pontiac tempest 1968 Service Manual page 598

S T E E R I N G
9-41
2. Install coupling clamping bolt and tighten to 30
ft. lb. Be sure to position flange so that It clears
end of adjuster plug by approximately 1/16" and
rotates without interference with adjuster plug
D
INSTALLATION OF STEERING GEAR
(Figs. 9-71
and 9^72)
1
0
Position steering gear assembly in car, align­
ing large head rivet in widest upper flange opening,
Fig. 9-11.
NOTE: Metal-to-metal contact between flanges on
stub shaft assembly and steering shaft assembly
will transmit and amplify 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 ft. lb, torque.
3
0
Install pitman arm and secure with lock washer
and nut. Tighten nut to 140 ft. lb. torque.
4. Connect pressure and return hose assemblies to
gear assembly and tighten to 25 ft. lb. torque.
5. Install two flange flexible coupling attaching
nuts and lock washers and tighten to 20 ft. lb,
torque
0
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 evi­
dence of air bubbles in reservoir. Re-check fluid
level and lower car.
POWER STEERING VANE TYPE PUMP
PERIODIC SERVICE RECOMMENDATIONS
No periodic service of the pump is required ex­
cept checking oil level in reservoir as outlined in
GENERAL LUBRICATION Section.
ADJUSTMENTS AND REPAIRS ON CAR
PUMP BELT TENSION ADJUSTMENTS
1. Loosen pump plate (support) to bracket bolts
two full turns.
2. Tighten belt with power steering pump to give
72 lbs. as indicated on Burroughs gauge for used
belt and 110 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.
2. Connect a spare pressure hose to pump union.
3. Using pressure gage J 5176-01, adapter fitting
J 22326, connect gage to both hoses.
4. Open hand valve on gage.
5. Start engine, allow system to reach operating
temperatures and check fluid level adding any fluid
if required.
6. Turn steering wheel slowly to left^dr right un­
til wheel is at full turn position. Holding wheel in
this position, read pressure on gage, pressure should
be at least 1000 psi, on Tempest, Firebird, and Pon­
tiac Catalina models, 1200 psi, on all other Pontiac
models. If pressure does not reach specification
there is either internal leakage in steering gear or
pump is malfunctioning.
NOTE: Vehicle's front wheel must be on ground
and supporting weight of vehicle. Do not hold
steering wheel at full turn for over 5 seconds, this
will prevent damage to pump.
7. To determine which problem exists, slowly
close hand valve on gage, pressure should read 1000
to 1100 psi. on Tempest, Firebird, and Pontiac
Catalina without air conditioner, 900 to 1100 Pontiac
Catalina with air conditioning, and 1100 to 1200 psi,
all other Pontiac models.
NOTE: Do not hold hand valve on gage closed
for over 5 seconds during this test to prevent dam­
age to pump.
8, If pressure does not reach specifications in step
7, pump is malfunctioning.
9, If pressure is within specifications in step 7,
problem is due to internal leakage in steering gear.
10. Shut off engine, remove testing gage, spare
hose, reconnect pressure, check fluid level or make
needed repairs,
REPLACEMENT OF FLOW CONTROL VALVE
WITHOUT REMOVING PUMP FROM CAR
1. Disconnect pressure hose from pump union and
drain oil.
2. Remove union from pump.