Specifications

GROUP
3-Suspension, Steering, Wheels & Tires
Pump, Control Valve, and Power
Cylinder Leak
If the fittings and connections do
not leak, check the other parts of the
system.
Check the hose connection at the
pump for leaks, and tighten the hose
clamp
if necessary.
Pump Leaks
If leakage occurs at the pump re-
servoir seal, or pump outlet fitting
seal, check the torque of the outlet
valve nut.
If torque is within specifi-
cations, replace the reservoir seal,
and/or outlet valve seal, whichever
is required
if leaks are evident other
than the lines.
Control Valve Leaks
If the control valve is leaking
(somewhere other than the tube seats),
replace all the seals, using a control
valve seal kit. Use all the parts in the
kit, and be sure they are correctly in-
stalled. When assembling the new
seals in the valve, an application of
silicone grease to the internal parts
will help to provide a better seal
against future leakage. Apply grease
to the centering spring area,
e.spe-
cially
on the cap and spacer mating
surfaces. Coat the threads of the cap
retaining bolts with grease. The rub-
ber boot seals, the actuator assembly,
and the metal cup seals in the control
valve should also be coated with sili-
cone grease.
Some oil remaining from the man-
ufacturing processes may
be found in
the sleeve near the ball stud. Do not
confuse this oil with leaking fluid
from the hydraulicsystem.
Power Cylinder Leaks
The power cylinder may leak at
the piston rod seals. A power
cyli,nder
seal kit should be used to correct leak-
age.
Do not replace the power cylinder
assembly unless the piston rod is
scored or has a
dull gray finish in-
stead of
a high luster chrome finish.
Pump-Fluid Pressure Test
A fluid pressure test will show
whether the pump or some other unit
in the power steering system is caus-
ing trouble
in the system. Steps out-
lined below should be followed to de-
termine the cause of the trouble.
'
1. Measure the pump belt tension.
When adjusting the belt tension on
the power steering pump, do not pry
against the
pump to obtain the prop-
er belt load.
" -
FIG. I-Pressure Testing Tool Installed
On pumps used with a 6-cylinder
engine, a half-inch cast boss has been
incorporated on the front face of
the pump cover plate onto which a
9/16 inch open end wrench can be
fitted to pry the pump and obtain
the proper belt tension. On pumps
used with an 8-cylinder engine, apply
leverage between the boss on the
pump mounting bracket and the front
face of the pump cover plate.
2. Disconnect the pressure line
hose from the pump outlet, and install
a 0-2000 psi
prcssure gauge and shut
off valve
betwecn the end of the hose
and the
pump outlet (Fig. I).
Be sure that the pressure gauge is
between the pump and the shut off
valve, all connections are tight, and
the shut off valve is fully open.
3. Connect a tachometer.
4. Start the engine and operate it
at idle speed for at least two minutes
to warm up the fluid.
5. Cycle the steering wheel from
stop-to-stop several times to expel any
air from the system; stop the engine.
Remove the reservoir filler cap and
check the fluid level
in the reservoir.
If necessary, add fluid CIAZ-19582-A
to the proper level.
6. With the engine running at ap-
proxi~nately
500 rpm and no steering
effort applied, and the fluid at
normal operating temperature
(160' -
180'. F), the pressure gauge should
show a pressure of. less than
50 psi.
If the pressure
isshigher, inspect the
hoses for kinks and obstructions.
7. Increase the engine speed to
1000 rpm; then, slowly close the
gauge shut-off valve. With the valve
fully closed, the pump pressure
should be 750 to 900 psi.
Do not close the valve for more
than a few seconds
( maximum 5 sec-
onds), as this would abnormally in-
crease the lubricant (fluid) temper-
ature and cause undue pump and/or
control valve wear. Engine rpm
should not exceed fast idle during
this test.
8.
Remove the tachometer and the
pressure testing gauge.
If pressure is more or less than
specification, replace the pump as-
sembly. If pressure is as specified and
steering efforts are heavy. the gear
and/or control valve could be at fault.
FRONT WHEEL ALIGNMENT
CHECKS
Do not attempt to check and ad-
just front wheel alignment without
first making a preliminary inspection
of the front-end parts.
Check all the factors of front wheel
alignment except the turning angle
before making any adjustments. The
turning angle should be checked only
after caster, camber, and toe-in have
been adjusted to specification.
The front wheel alignment specifi-
cations, given
in Part 3-6 are correct
only when the vehicle is at curb
height. Before checking or
adjust-