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STEERING
19-27
Fig. 4-Flow
Tesf Gauge Connections
(3) Disconnect the return hose at the power steer-
ing pump. Use care to avoid damaging the return hose
screen. Remove the return hose screen and examine
for rips
or creases. If the screen is damaged inspect
the reservoir for any loose pieces of screen. If the
screen is damaged replace with a new screen. Make
certain that the screen is clean and properly rein-
stalled after completion of the pump flow test.
(4)
Install the flow checking gauge set Tool C-3885
with special hose between the power steering pump
and the return hose disconnected from the pump, Fig.
4.
NOTE: The fitting that has the restriction; and
the arrow on the "tee" connector (Fig. 4) must be
towards the power steering pump.
(5)
Remove the oil reservoir cover and fill reser-
voir to the proper level.
(6)
Start the engine and operate at
500
engine
rpm.
(7)
Expel all air from the unit by turning the steer-
ing wheel to the full right turn and back to the full
left turn several times.
(8) Increase the engine speed
1000
to
1200
rpm and
with no steering effort applied, oil temperature be-
tween
150
degrees F. and
170
degrees F. (check the
thermometer in reservoir), the flow pressure gauge
in the pump return line should read between
14
psi
and 25 psi. If the correct checking orifice is used for
the test and the flow pressure gauge registers less
than
14
psi. inspect to see if the restrictor is in-
stalled properly and
if
it is installed properly, dirt may
be restricting control valve movement or blocking
the orifice or flow valve spring may be weak. If the
return pressure is greater than
25
psi, the flow valve
may be stuck in the closed position.
(9)
Decrease the engine speed to
500
rpm, then
slowly turn the pressure gauge shut-off valve towards
the closed position to obtain the following pressure
readings on pressure gauge at the pump discharge
without fully closing shut-off valve.
CAUTION:
Do not close valve completely.
(a)
(.96
displacement pump) AV1, AV2 models
750/800
psi.
(b)
(.96
displacement pump) AR1, AR2, AP1, AP2
models
950/1000
psi.
(c)
(1.2
displacement pump) A P l , AP2, AR1, AR2
models
900/ 1000
psi.
With the above values registered on the pressure
gauge the flow checking gauge should show a mini-
mum pressure of 10 psi. If the flow pressure reading
is less than
10
psi; test the flow valve operation for
sticking; if the valve operation is satisfactory the
pump is worn and should be replaced.
If the flow pressure reading is 10 psi or greater, and
the relief valve is operating properly; the pump is
good.
When removing the test equipment, make sure the
pressure and return hoses are reinstalled properly.
There should be no interference of the hoses with
components attached to the fender shield or dash
panel.
NOTE: The return hose screen should
be
cleaned
and reinstalled in the end of the return hose before
reinstalling the return hose.
PUMP REMOVAL
(1)
Loosen the pump lower mounting bolt and re-
move the belt from the pulley.
(2)
Place a container under the pump and discon-
nect both hoses at the pump. Cap ends of hoses and
secure hoses high enough to prevent loss of fluid.
(3) Remove the bolts attaching the bracket to the
engine and remove the pump and bracket assembly.
OIL
SEAL REPLACEMENT
(1)
Clean the exterior of the pump before disas-
(2)
Remove the filler cap and drain the reservoir.
(3)
Remove the brackets, reservoir screws gasket
(4)
Using spacer washers between the bracket and
sembly.
and "0" ring.
the pump, clamp the bracket in a vise (Fig.
5).
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