SUBARU LEGACY 1997 Service Repair Manual

3. OIL REPLACEMENT (RHD MODEL)
After stabilization and discharge, replace the component,
adding the appropriate amount of oil (ND-OIL9) to the new
component before installation.
ConditionProper charging
methodAmount of oil to
be added
m
(US fl oz,
lmp fl oz)
Replacement of compressorRemove all oil
from new
compressor and
charge it with
amount of oil
shown in right
column.70 (2.4, 2.5)
Replacement of evaporator—70 (2.4, 2.5)
Replacement of receiver drier
(Liquid tank)Oil need not be
added.—
Replacement of
condenserThere is no sign
of leakage.Oil need not be
added.—
There is
evidence of a
large amount of
oil leakage from
condenser.—50 (1.7, 1.8)
Replacement of
flexible hose or
aluminum pipeThere is no sign
of leakage.Oil need not be
added.—
There is
evidence of a
large amount of
oil leakage.—50 (1.7, 1.8)
Gas leakageThere is no sign
of leakage.Oil need not be
added.—
There is
evidence of a
large amount of
oil leakage.—50 (1.7, 1.8)
If the compressor is replaced (after stabilization):
1) Drain and measure the oil from the original compressor.
2) Drain the oil from the replacement compressor and refill
with the same amount that was drained from the original
[20 m
(0.7 US fl oz, 0.7 Imp fl oz) minimum]. Always use
ND-OIL9 for the replacement oil.
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4-7SERVICE PROCEDURE
9. Lubrication

10. Performance Test
1. VEHICLE SET UP
In order to obtain meaningful test results, the vehicle must
be set up to meet the following conditions:
1) Vehicle in shade
2) No wind
3) All vehicle doors closed
4) Front windows opened
5) Hood opened
6) Engine speed set at 1,500 rpm.
7) A/C ON
8) Temperature control lever—Maximum cold
9) Air source—Recirculation
10) Blower speed—4th position (High)
11) Operate A/C for 10 minutes (Minimum) before taking
measurement.
2. MEASUREMENTS
After 10 minutes (Minimum) of A/C operation and using
accurate test equipment, take the following measurements
(in order):
1) Evaporator intake air temperature at recirculation door.
2) Evaporator discharge air temperature at center grill.
3) Condenser (Ambient) intake air temperature measured
0.9 m (3 ft) in front and in line with the center of the con-
denser.
4) Suction (Low) side pressure
5) Discharge (High) side pressure
NOTE:
If only one thermometer is available; 1) take the ambient
measurement first; then 2) the intake air; and 3) dis-
charge air temperature.
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4-7SERVICE PROCEDURE
10. Performance Test

3. MEASUREMENT STANDARD BY VERSES
Compare temperature and pressure measurements with
the established standards shown in the following charts.
B4M0371A
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4-7SERVICE PROCEDURE
10. Performance Test

11. Compressor
Compressor is a swash plate type. When trouble occurs,
replace compressor as a single unit.
B4M0090
A: COMPRESSOR CLUTCH INSPECTION
Compressor clutch trouble is often caused by clutch slip-
page and noise. Check and take corrective measures, as
required.
1) Remove belt cover.
2) Check that clearance between drive plate and pulley
over the entire perimeter is within specifications.
Clearance:
0.3 — 0.6 mm (0.012 — 0.024 in)
B4M0091
3) Check that voltage applied to magnetic coil is at least
10.5 volts.
4) When noise is noted, check that it originates in either
compressor or pulley bearing.
B4M0760A
B: REMOVAL
1) Disconnect ground cable from battery.
2) Discharge refrigerant using refrigerant recovery system.

(1) Fully close low-pressure valve of manifold gauge.
(2) Connect low-pressure charging hose of manifold
gauge to low-pressure service valve.
(3) Open low-pressure manifold gauge valve slightly,
and slowly discharge refrigerant from system.
CAUTION:
Do not allow refrigerant to rush out. Otherwise, com-
pressor oil will be discharged along with refrigerant.
30
4-7SERVICE PROCEDURE
11. Compressor

B4M0761A
3) Remove low-pressure hose
1(Flexible hose Ps) and
high-pressure hose

2(Flexible hose Pd).
CAUTION:
Be careful not to lose O-ring of low-pressure hose.
Plug the opening to prevent foreign matter from
entering.
G4M0624
4) Remove compressor belt cover and alternator belt
cover.
Remove bolts which secure belt covers.
G4M0625
5) Remove alternator V-belt.
Loosen lock bolt on alternator bracket. Turn adjusting bolt
and remove V-belt.
G4M0626
6) Remove compressor V-belt.
Loosen lock nut on idler pulley. Turn adjusting bolt and
remove V-belt.
G4M0627
7) Disconnect alternator harness.
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4-7SERVICE PROCEDURE
11. Compressor

G4M0628
8) Disconnect compressor harness.
Disconnect compressor harness from body harness.
9) Lower bracket.
Remove bolts which secure lower compressor bracket.
G4M0629
10) Remove compressor.
Remove bolt which secure compressor. Remove compres-
sor from bracket.
G4M0630
C: INSTALLATION
1) Install compressor.
Install compressor on bracket.
2) Connect compressor harness.
3) Connect alternator harness.
4) Install compressor V-belt (Rear).
After adjusting belt tension, tighten tension pulley lock nut
securely.
G4M0632
5) Install alternator V-belt.
After adjusting V-belt tension, tighten alternator bracket
lock bolt securely.
6) Check drive belt tension and adjust it if necessary by
changing alternator position and/or idler pulley position.
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4-7SERVICE PROCEDURE
11. Compressor

Pulley arrangement Tension mm (in)/98N (10 kg, 22 lb)
G4M0939
AB
*New belt:
7.0—9.0
(0.276—0.354)
Existing belt:
9.0—11.0
(0.354—0.433)*New belt:
7.5—8.5
(0.295—0.335)
Existing belt:
9.0—10.0
(0.354—0.394)
* When replacing belts with new ones, adjust tensions to
specification and then readjust to the same specification
after running engine for 5 minutes.
Figures in table refer to the number of grooves in pulleys.
C/P : Crankshaft pulley
ALT : Alternator pulley
P/S : Power steering oil pump pulley
A/C : Air conditioner compressor pulley
I/P : Idler pulley
G4M0634
CAUTION:
Ensure that the V-belt is aligned correctly. If it is not,
check for loose bolts.
The V-belt should not be too tight or too loose.
A belt which is too tight may break bearing or cause
gas to leak from the shaft seal. A belt which is too
loose slips, thereby causing the belt cut.
After completing the compressor installation and
testing the system operation, check and adjust the ten-
sion of both V-belts again.
B4M0761A
7) Install high-pressure hose
2(Flexible hose Pd).
Connect high-pressure hose with compressor.
CAUTION:
Be sure to apply compressor oil to the periphery of
O-ring.
B4M0761A
8) Install low-pressure hose
1(Flexible hose Ps).
Connect low-pressure hose with compressor.
CAUTION:
Be sure to apply compressor oil to the periphery of
O-ring.
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4-7SERVICE PROCEDURE
11. Compressor

9) Install belt cover.
10) Connect ground cable to negative terminal of battery.
11) Charge refrigerant.
B4M0095
12. Condenser
A: REMOVAL AND INSTALLATION
1) Disconnect battery negative terminal.
2) Discharge refrigerant using refrigerant recovery system.

3) Remove front grille.
G2M0375
4) Remove canister from bracket.
CAUTION:
Do not disconnect hose from canister.
Insert air vent hose of canister into the hole on body.
B4M0096A
5) Remove the radiator upper bracket of both side.
6) Disconnect high-pressure hose

1and high-pressure
pipe

2from condenser.
B4M0097
7) Remove the two bolts which secure condenser. While
lifting condenser, remove it through space between radia-
tor and radiator panel.
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4-7SERVICE PROCEDURE
11. Compressor - 12. Condenser

9) Install belt cover.
10) Connect ground cable to negative terminal of battery.
11) Charge refrigerant.
B4M0095
12. Condenser
A: REMOVAL AND INSTALLATION
1) Disconnect battery negative terminal.
2) Discharge refrigerant using refrigerant recovery system.

3) Remove front grille.
G2M0375
4) Remove canister from bracket.
CAUTION:
Do not disconnect hose from canister.
Insert air vent hose of canister into the hole on body.
B4M0096A
5) Remove the radiator upper bracket of both side.
6) Disconnect high-pressure hose

1and high-pressure
pipe

2from condenser.
B4M0097
7) Remove the two bolts which secure condenser. While
lifting condenser, remove it through space between radia-
tor and radiator panel.
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4-7SERVICE PROCEDURE
11. Compressor - 12. Condenser

B4M0098A
8) The condenser should be installed in the reverse order
in which it was removed.
When installing the condenser, pay attention to the follow-
ing:
CAUTION:
Before connecting the pipe, be sure to apply oil to the
periphery of O-ring.
NOTE:
After installing condenser, ensure that guide on lower side
of condenser is inserted into hole in radiator panel. Tighten
attaching bolts.
9) Charge refrigerant.
B: INSPECTION
1) Make sure the condenser fins are free from dust and
insects. If the fins are clogged, clean by blowing air or
water through them.
NOTE:
To prevent dust and water from getting into the condenser,
this work must be done when the condenser is installed in
an actual vehicle.
2) Check the condenser to see if it shows any sign of oil.
Should oil ooze or gas leak from the condenser replace it
with a new one.
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4-7SERVICE PROCEDURE
12. Condenser