checking oil SUBARU LEGACY 1997 Service Owner's Guide

6. Control Valve (Power Steering
Gearbox) [RHD model]
NOTE:
This section focuses on the disassembly and reassembly
of control valve. For the inspection and adjustment and the
service procedures for associated parts, refer to“Steering
Gearbox”.
B4M0668A
A: CHECKING OIL LEAKING POINTS
1. OIL LEAKING POINTS
1) If leak point is other than a, b, c, or d, perform check
step 5) in 4-3 [W6A2] before dismounting gearbox from
vehicle. If gearbox is dismounted without confirming where
the leak is, it must be mounted again to locate the leak
point.
2) Even if the location of the leak can be easily found by
observing the leaking condition, it is necessary to thor-
oughly remove the oil from the suspected portion and turn
the steering wheel from lock to lock about 30 to 40 times
with engine running, then make comparison of the sus-
pected portion between immediately after and several
hours after this operation.
3) Before starting oil leak repair work, be sure to clean the
gearbox, hoses, pipes, and surrounding parts. After com-
pleting repair work, clean these areas again.
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4-3SERVICE PROCEDURE
6. Control Valve (Power Steering Gearbox) [RHD model]

9. Power Steering Fluid
A: RECOMMENDED AIR BLEEDING AND
POWER STEERING FLUID
Recommended power steering fluid Manufacturer
ATF DEXRON II or ATF DEXRON IIEB.P.
CALTEX
CASTROL
MOBIL
SHELL
TEXACO
1) Feed the specified fluid with its level being about 5 cm
(2.0 in) lower than the mouth of tank.
2) Continue to turn steering wheel slowly from lock to lock
until bubbles stop appearing in the tank while keeping the
fluid at that level.
3) In case air is absorbed to deliver bubbles into piping
because the fluid level is lower, leave it about half an hour
and then do the step 2) all over again.
4) Start, and idle the engine.
5) Continue to turn steering wheel slowly from lock to lock
again until bubbles stop appearing in the tank while keep-
ing the fluid at that level.
It is normal that bubbles stop appearing after three times
turning of steering wheel.
6) In case bubbles do not stop appearing in the tank, leave
it about half an hour and then do the step 5) all over again.
7) Stop the engine, and take out safety stands after jack-
ing up vehicle again.
Then lower the vehicle, and idle the engine.
8) Continue to turn steering wheel from lock to lock until
bubbles stop appearing and change of the fluid level is
within 3 mm (0.12 in).
9) In case the following happens, leave it about half an
hour and then do step 8) again.
(1) The fluid level changes over 3 mm (0.12 in).
(2) Bubbles remain on the upper surface of the fluid.
(3) Grinding noise is generated from oil pump.
10) Check the fluid leakage at flare nuts after turning
steering wheel from lock to lock with engine running.
CAUTION:

Before checking, wipe off any fluid on flare nuts and
piping.

In case the fluid leaks from flare nut, it is caused by
dust (or the like) and/or damage between flare and
tapered seat in piping.

So remove the flare nut, tighten again it to the speci-
fied torque after cleaning flare and tapered seat. If flare
or tapered seat is damaged, replace it with a new one.
11) Inspect fluid level on flat and level surface with engine
“OFF”by indicator of filler cap.
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4-3SERVICE PROCEDURE
9. Power Steering Fluid

8. Leak Testing
The following points should be kept in mind when conduct-
ing a refrigerant leak test.
1) The A/C system to be tested must have an adequate
refrigerant charge to begin with.
2) The area where the leak test is conducted must be free
of wind and drafts, with still air being the ideal condition.
3) The atmosphere where the leak test is conducted must
be free of refrigerant contamination.
4) Operate the A/C system for approx. 10 minutes, then
turn the engine off an begin the leak test.
5) Refrigerant gas is heavier than air, therefore always
hold the probe below the connection being tested.
6) When checking for a leak along a length of hose or
tube, the leak detector probe must be moved slowly,
approx. 25 mm (1 in) per second making sure probe does
not come in contact with the component being tested.
7) When checking for a leak at a certain point, the leak
detector probe must be held at that point for at least 5
seconds.
G4M0609
1. CHECK THE SYSTEM PRESSURE
With gauges connected to the A/C system, operate the A/C
and confirm that the high side pressure is above 690 kPa
(7.03 kg/cm
2, 100 psi). If not, evacuate and charge the
system before leak checking (refer to evacuation and
charging sections).
2. CLEAN CONNECTIONS BEFORE TESTING
Before testing, use a clean shop towel to wipe off refriger-
ant oil, dirt, or foreign material from all of the connections
and components to be tested.
NOTE:
Since refrigerant oil absorbs refrigerant, excess oil on or
near a connection may falsely signal a leak.
B4M0089
3. CALIBRATE LEAK DETECTOR
Refer to the manufacturer’s instructions for the particular
type of detector used and calibrate the instrument.
CAUTION:
Always make sure that the probe tip filter is clean and
free of contamination.
23
4-7SERVICE PROCEDURE
8. Leak Testing

B: ABNORMAL DISPLAY ON AT OIL TEMP
INDICATOR
When any on-board diagnostic item is malfunctioning, the
display on the AT OIL TEMP indicator blinks immediately
after the engine starts.
The malfunctioning part or unit can be determined by a
trouble code during on-board diagnostic operation. Prob-
lems which occurred previously can also be identified
through the memory function.
If the AT OIL TEMP indicator does not show a problem
(although a problem is occurring), the problem can be
determined by checking the performance characteristics of
each sensor using the select monitor.
Indicator signal is as shown in the figure.
WARNING:
Warning can be noticed only when the engine is ini-
tially started.
B3M0410A
12
3-2AUTOMATIC TRANSMISSION AND DIFFERENTIAL
6. Diagnostic Chart for On-board Diagnostic System

B: CHECKING THE HYDRAULIC UNIT
OPERATION

1) Do ABS sequence control patterns take place in correct
order?
If not, check wiring and piping for incorrect connections.
2) Are oil pressure or braking force variations within speci-
fications?
If not, check master cylinder, brake piping, hydraulic unit,
proportioning valve and wheel cylinder for improper opera-
tion.
3) Does pedal hardness change before and after ABS
sequence control?
If so, bleed air from brake line.
271
4-4cBRAKES [ABS 5.3 TYPE]
11. General Diagnostics Table