ac 25 procedure SUBARU TRIBECA 2009 1.G Service Service Manual
[x] Cancel search | Manufacturer: SUBARU, Model Year: 2009, Model line: TRIBECA, Model: SUBARU TRIBECA 2009 1.GPages: 2453, PDF Size: 46.32 MB
Page 348 of 2453
AC-22
Refrigerant Charging Procedure
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
7) Note the low-pressure gauge reading.
8) Leave it at least 5 minutes, and then check the
low-pressure gauge reading for any changes.
If the gauge indicator shows near zero point, it is a
sign of leakage. Check pipe connector points, re-
pair them, and make sure there is no leakage.
9) Follow the can tap operation manual, install to
the refrigerant can.
10) Disconnect the center manifold hose from the
vacuum pump, and connect the hose to the tap
valve.
11) When a 13.6 kg (30 lb) refrigerant container is
used, measure the weight of the refrigerant amount
to use using a scale.
12) Confirm that all the 3 hoses are connected se-
curely to the manifold gauge set.
13) Open the valve on the HFC-134a source.
14) Loosen the center hose connection on the
manifold gauge set (if applicable, press a purge
valve on the manifold gauge set) for a few seconds
to allow the air in the center hose to escape by the
refrigerant pressure.
15) Stop the engine and carefully open the high-
pressure valve.
CAUTION:
Do not open the low-pressure valve.
CAUTION:
Never run the engine while charging from the
high-pressure side.
16) Close the high-pressure valve when the low-
pressure gauge reaches 98 kPa (1 kg/cm2, 14 psi).
Using a leak tester, check the system for leaks.
If any leakage is found after the refrigerant recov-
ery is completed, repair the applicable area.
(A) Tap valve
(B) Center manifold hose
(A) Refrigerant container (HFC-134a)
(B) Scale
AC-00027
AC-00028
(A)
(B)
AC-00029
(A)
(B)
(A) Low-pressure gauge (Compound pressure
gauge)
(B) High-pressure gauge
(C) Close
(A) Low-pressure gauge (Compound pressure
gauge)
(B) High-pressure gauge
(C) Close
(D) Ignition switch OFF
(E) Slowly open
AC-00030
(A) (B)
(C)(C)
AC-00031
(A) (B)
(E)
(D)
(C)
Page 349 of 2453
AC-23
Refrigerant Charging Procedure
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
17) After confirming that there are no leaks with the
leak test, charge the required amount of refrigerant.
CAUTION:
Never run the engine while charging from the
high-pressure side.
18) Close the high-pressure valve when;
•the readings of low- / high-pressure gauges be-
come almost equal, after the charging speed is re-
duced,
•the HFC-134a source becomes empty, or the
system is full with the gas.
19) If the HFC-134a source is empty, close the
high-pressure valve, close the valve on the can tap,
and replace the HFC-134a source with a new one
to restart the operation.
20) Confirm that both the low- / high-pressure
valves can be closed. Start the engine with the A/C
switch OFF.
21) Quickly repeat ON-OFF cycles a few times to
prevent initial compressor damage.
22) Set up the vehicle as follows:
•A/C switch ON
•Engine running at 1,500 rpm
•Blower setting speed “HI”, (For models with rear
coolers, also turn the rear cooler fan switch to “HI”)
•Temperature setting to “MAX COOL”
•Air inlet setting to “RECIRC”
•Window open
23) While reading the low-pressure gauge, careful-
ly open the low-pressure valve with the refrigerant
source connected and the service hose purged.
CAUTION:
Never open the high-pressure valve with the en-
gine running. The high-pressure gas will back-
flow resulting in an explosion of the can.
24) Adjust the refrigerant flow to maintain the pres-
sure on the low-pressure side at 276 kPa (2.81 kg/
cm2, 40 psi) max.
25) After the system is fully charged, close the low-
pressure valve.
26) Close the valve on the refrigerant source.
27) Disconnect the hose from the service port, and
install the service port cap.
(A) Low-pressure gauge (Compound pressure
gauge)
(B) High-pressure gauge
(C) Close
AC-00032
AC-00033
(A) (B)
(C)(C)
Refrigerant amount
Refrigerant Minimum Maximum
HFC-134a 840 g (1.85 lb) 900 g (1.98 lb)
AC-00034
Page 351 of 2453
AC-25
Compressor Oil
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
6. Compressor Oil
A: PROCEDURE
NOTE:
Before making repairs, perform the oil return oper-
ation to return the compressor oil in circulation with
the refrigerant to the compressor.
1) Increase the engine to 1,500 rpm.
2) Turn on the A/C switch.
3) Turn the temperature control switch to MAX
COOL.
4) Put in RECIRC position.
5) Turn the blower control switch to HI. (For models
with rear coolers, also turn the rear cooler fan
switch to HI)
6) Leave in this condition for 10 minutes.
B: REPLACEMENT
NOTE:
•If a component has been replaced, add an ap-
propriate amount of compressor oil (same as the
amount of remaining oil in removed component).
•When replacing the compressor, the new com-
pressor will already have the specified amount of
oil in it. Install the new compressor after removing
the same amount of oil that is remaining in the com-
pressor removed.
Page 356 of 2453
AC-30
Heater Core
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
11.Heater Core
A: REMOVAL
1) Disconnect the ground cable from battery.
2) Draw out the refrigerant with the refrigerant re-
covery unit
3) Remove the heater and cooling unit.
4) Remove the screws and remove the heater core
cover and pipe clamp.
5) Remove the heater core (A).
B: INSTALLATION
Install in the reverse order of removal.
AC-01133
AC-01134(A)
Page 359 of 2453
AC-33
Compressor
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
14.Compressor
A: INSPECTION
1. MAGNETIC CLUTCH CLEARANCE
Check the clearance of the entire circumference
around the drive plate and pulley.
Standard:
0.45±0.15 mm (0.0177±0.0059 in)
2. MAGNETIC CLUTCH OPERATION
1) Disconnect the compressor connector.
2) Connect the positive (+) lead from the battery to
the compressor connector terminal, and the nega-
tive (–) lead to the compressor body.
3) Check the magnet clutch engagement.
If there is a problem, replace the compressor.
B: REMOVAL
1) Perform the compressor oil return operation.
2) Turn the A/C switch to OFF and stop the engine.
3) Using the refrigerant recovery system, dis-
charge refrigerant.
4) Disconnect the ground cable from battery.
5) Remove the V-belts.
6) Remove the generator.
7) Remove the bolt and remove the low-pressure
hose and high-pressure hose.
8) Disconnect the compressor harness from the
body harness.
9) Remove the bolts and remove the compressor
bracket.
10) Remove the bolts, then remove the bracket
from the compressor.
C: INSTALLATION
1) Install in the reverse order of removal.
2) Replace the O-rings on low-/high-pressure hos-
es with new parts, then apply compressor oil.
3) After replacing the compressor, adjust the
amount of compressor oil.
4) Charge refrigerant.
Tightening torque:
Refer to “COMPONENT” of “General Descrip-
tion”.
AC-01287
AC-01381
AC-01289
AC-01290
Page 360 of 2453
AC-34
Condenser
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
15.Condenser
A: REMOVAL
1) Using the refrigerant recovery system, dis-
charge refrigerant.
2) Disconnect the ground cable from battery.
3) Remove the bumper upper cover.
4) Disconnect the pressure hose and pipe from the
condenser.
5) Remove the 4 bolts, lift the condenser and pull
out from the space between the radiator and
bumper.
CAUTION:
•Be careful not to damage the condenser fins.
If a damaged fin is found, repair it using a thin
screwdriver.
•If the condenser is replaced, add an appropri-
ate amount of compressor oil to the compres-
sor.
B: INSTALLATION
1) Install in the reverse order of removal.
CAUTION:
Replace the O-rings on hoses or pipes with new
parts, and then apply compressor oil.
2) Charge refrigerant.
Tightening torque:
Refer to “COMPONENT” of “General Descrip-
tion”.
tion.>
C: INSPECTION
1) Check to see that the condenser fins are not
clogged with debris or insects. Blow with com-
pressed air or flush fins with water as needed.
2) Inspect for oil leakage from the condenser. If a
failure is found, replace the condenser with a new
one.
AC-01292
AC-01291
AC-01293
Page 361 of 2453
AC-35
Heater and Cooling Unit
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
16.Heater and Cooling Unit
A: REMOVAL
1. FRONT
1) Disconnect the ground cable from battery.
2) Using the refrigerant recovery system, dis-
charge refrigerant.
3) Drain engine coolant from the radiator.
4) Remove the bolts securing expansion valve and
pipe in engine compartment. Release the heater
hose clamps in engine compartment to remove the
hoses.
5) Remove the instrument panel.
6) Remove the support beam.
7) Remove the blower motor unit assembly.
bly.>
8) Disconnect the actuator connector.
9) Remove the bolt and nuts and remove the heat-
er and cooling unit.
2. REAR
1) Disconnect the ground cable from battery.
2) Using the refrigerant recovery system, dis-
charge the refrigerant.
3) Remove the quarter trim.
4) Remove the bolts, then disconnect the rear tube.
5) Disconnect the harness connector.
6) Remove the nuts, then remove the cooler unit.
B: INSTALLATION
1) Install in the reverse order of removal.
2) Charge refrigerant.
Tightening torque:
Refer to “COMPONENT” of “General Descrip-
tion”.
AC-01294
AC-01295
Page 362 of 2453
AC-36
Evaporator
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
17.Evaporator
A: REMOVAL
1. FRONT
1) Using the refrigerant recovery system, dis-
charge refrigerant.
2) Disconnect the ground cable from battery.
3) Remove the blower motor unit assembly.
bly.>
4) Disconnect the connector, remove the screw
and then remove the air-mix door actuator and
mode door actuator.
5) Remove the bolts holding the expansion valve,
and remove the expansion valve.
6) Remove the screws and pull out the evaporator.
7) Remove the pipe cover from the evaporator.
8) Remove the bolt which holds the pipe to evapo-
rator, and remove the evaporator.
CAUTION:
If the evaporator is replaced, add an appropri-
ate amount of compressor oil to the evaporator.
2. REAR
1) Using the refrigerant recovery system, dis-
charge the refrigerant.
2) Disconnect the ground cable from battery.
3) Remove the rear cooler unit.
4) Remove the pipe bracket bolts and remove the
bracket.
AC-01296
AC-01298
AC-01300
AC-01317
AC-01299
AC-01343
Page 364 of 2453
AC-38
Hose and Tube
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
18.Hose and Tube
A: REMOVAL
CAUTION:
•When disconnecting/connecting hoses, do
not apply an excessive force to them. After in-
stalling, check that no torsion or excessive ten-
sion applied to the hoses.
•Seal the disconnected hose with a plug or vi-
nyl tape to prevent foreign matter from enter-
ing.
1. FRONT
1) Disconnect the ground cable from battery.
2) Using the refrigerant recovery system, dis-
charge refrigerant.
3) Remove the evaporator unit mounting bolt (A)
and low-pressure hose bracket bolt (B).
4) Remove the low-pressure hose attaching bolts
(C).
5) Disconnect the low-pressure hose from evapo-
rator unit.
6) Disconnect the low-pressure hose from com-
pressor.
7) Remove the low-pressure hose from vehicle.
8) Remove the high-pressure hose attaching bolt
(D).
9) Disconnect the high-pressure hose from com-
pressor.
10) Disconnect the high-pressure hose from con-
denser.
11) Remove the high-pressure hose from vehicle.
12) Remove the high-pressure tube attaching bolt
(E).
13) Remove the high-pressure tube from vehicle.
2. REAR
1) Disconnect the ground cable from battery.
2) Using the refrigerant recovery system, dis-
charge refrigerant.
3) Remove the sheet and floor mat.
4) Remove the ECM bracket and tube protector.
5) Remove the quick connectors (A and B).
ST REMOVER PS 73499XA01A
ST REMOVER PD73499XA00A
NOTE:
Refer to the instruction manual for the ST when
working.
6) Remove the tube bracket.
7) Remove the front tube and rear tube connecting
bolts (C)
8) Remove the connecting bolts (D) of the rear
cooler unit.
AC-01318
(A)
(B)
(D)(C)
(D)
(E)
Page 365 of 2453
AC-39
Hose and Tube
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
9) Remove the front tube (E) and rear tube (F).
B: INSTALLATION
CAUTION:
•When disconnecting or connecting the hos-
es, do not apply excessive force. After install-
ing, check that no torsion or excessive tension
applied to the hoses.
•Seal the disconnected hose with a plug or vi-
nyl tape to prevent foreign matter from enter-
ing.
1) Install in the reverse order of removal.
2) Charge refrigerant.
Tightening torque:
Refer to “COMPONENT” of “General Descrip-
tion”.
C: INSPECTION
Check the hoses for cracks, damage and expan-
sion. If any fault is found, replace with new parts.
AC-01319
(A)(B)
(E)
(F)
(D)
(C)