Infiniti M45 (Y34). Manual — part 165
REFRIGERANT LINES
ATC-145
C
D
E
F
G
H
I
K
L
M
A
B
ATC
Removal and Installation of Liquid Tank
AJS0008W
REMOVAL
1.
Use a refrigerant collecting equipment (for HFC-134a) to discharge refrigerant.
2.
Remove front grille. Refer to
3.
Unscrew, and remove the pipe securing bracket.
4.
Unscrew liquid tank securing band.
5.
Pull out the liquid tank and liquid tank securing band through the
top.
INSTALLATION
Installation is basically the reverse order of removal.
CAUTION:
●
Replace refrigerant pressure sensor O-ring with a new one. Apply compressor oil prior to installa-
tion.
●
When recharging refrigerant, check for leaks.
1.
Liquid tank
2.
Liquid tank securing bands
3.
Screw
4.
Securing bracket piping
5.
Screw
6.
O-ring
7.
Condenser
8.
Refrigerant pressure sensor
SJIA0132J
SJIA0133E
ATC-146
REFRIGERANT LINES
Removal and Installation of Evaporator
AJS0008X
REMOVAL
1.
Remove engine cover. Refer to
.
2.
Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant.
3.
Drain coolant from cooling system and disconnect heater hoses.
Refer to
MA-12, "Changing Engine Coolant"
4.
Disconnect low-pressure flexible hose and high-pressure pipe
from the evaporator.
CAUTION:
Cap or wrap the open ends of low-pressure flexible hose
and high-pressure pipe with a suitable material such as a
vinyl tape to avoid the entry of air.
5.
Remove heater & cooling unit. Refer to
.
6.
Remove cooler grommet, expansion valve cover and expansion
valve.
7.
Remove air mix door motor and mode door motor bracket.
8.
Remove evaporator cover.
9.
Slide the evaporator, and then remove it from the heater & cool-
ing unit assembly.
10. Remove intake sensor from the evaporator, and then remove
evaporator.
INSTALLATION
Installation is basically the reverse order of removal.
CAUTION:
●
Replace low-pressure flexible hose and high-pressure pipe O-rings with new ones. Apply com-
pressor oil prior to installation.
●
Mark mounting position of the intake sensor bracket.
●
When recharging refrigerant, check for leaks.
Removal and Installation of Expansion Valve
AJS000QV
REMOVAL
1.
Remove engine cover. Refer to
.
2.
Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant.
3.
Drain coolant from cooling system and disconnect heater hoses.
Refer to
MA-12, "Changing Engine Coolant"
4.
Disconnect low-pressure flexible hose and high-pressure pipe
from the evaporator.
CAUTION:
cap or wrap the joint of low-pressure flexible hose and
high-pressure pipe with a suitable material such as a vinyl
type to avoid the entry of air.
RJIA1314E
RJIA0110E
RJIA1314E
REFRIGERANT LINES
ATC-147
C
D
E
F
G
H
I
K
L
M
A
B
ATC
5.
Remove high-pressure pipe from clip.
6.
Remove expansion valve cover.
7.
Remove expansion valve.
INSTALLATION
Installation is basically the reverse order of removal.
CAUTION:
●
Replace O-rings with new ones, then apply compressor oil to them when installing them.
●
When recharging refrigerant, check for leaks.
Checking for Refrigerant Leaks
AJS00090
Perform a visual inspection of all refrigeration parts, fittings, hoses and components for signs of A/C lubricant
leakage, damage and corrosion. A/C lubricant leakage may indicate an area of refrigerant leakage. Allow
extra inspection time in these areas when using either an electronic refrigerant leak detector or fluorescent
dye leak detector.
If dye is observed, confirm the leak with an electronic refrigerant leak detector. It is possible a prior leak was
repaired and not properly cleaned.
When searching for leaks, do not stop when one leak is found but continue to check for additional leaks at all
system components and connections.
When searching for refrigerant leaks using an electronic leak detector, move the probe along the suspected
leak area at 1 to 2 inches per second and no further than 1/4 inch from the component.
CAUTION:
Moving the electronic leak detector probe slower and closer to the suspected leak area will improve
the chances of finding a leak.
RJIA1321E
RJIA0334E
ATC-148
REFRIGERANT LINES
Checking System for Leaks Using the Fluorescent Leak Detector
AJS00091
1.
Check A/C system for leaks using the UV lamp and safety goggles (J-42220) in a low sunlight area (area
without windows preferable). Illuminate all components, fittings and lines. The dye will appear as a bright
green/yellow area at the point of leakage. Fluorescent dye observed at the evaporator drain opening indi-
cates an evaporator core assembly (tubes, core or expansion valve) leak.
2.
If the suspected area is difficult to see, use an adjustable mirror or wipe the area with a clean shop rag or
cloth.
3.
After the leak is repaired, remove any residual dye using dye cleaner (J-43872) to prevent future misdiag-
nosis.
4.
Perform a system performance check and verify the leak repair with an approved electronic refrigerant
leak detector.
NOTE:
Other gases in the work area or substances on the A/C components, for example, anti-freeze, windshield
washer fluid, solvents and lubricants, may falsely trigger the leak detector. Make sure the surfaces to be
checked are clean.
Clean with a dry cloth or blow off with shop air.
Do not allow the sensor tip of the detector to contact with any substance. This can also cause false readings
and may damage the detector.
Dye Injection
AJS00092
(This procedure is only necessary when recharging the system or when the compressor has seized and was
replaced.)
1.
Check A/C system static (at rest) pressure. Pressure must be at least 345 kPa (3.52 kg/cm
2
, 50 psi).
2.
Pour one bottle (1/4 ounce / 7.4 cc) of the A/C refrigerant dye into the injector tool (J-41459).
3.
Connect the injector tool to the A/C LOW PRESSURE side service fitting.
4.
Start engine and AUTO switch ON.
5.
When the A/C operating (compressor running), inject one bottle (1/4 ounce / 7.4 cc) of fluorescent dye
through the low-pressure service valve using dye injector tool J-41459 (refer to the manufacture's operat-
ing instructions).
6.
With the engine still running, disconnect the injector tool from the service fitting.
CAUTION:
Be careful when servicing the A/C system or replacing a component, pour the dye directly into the
open system connection and proceed with the service procedures.
7.
Operate the A/C system for a minimum of 20 minutes to mix the dye with the system oil. Depending on the
leak size, operating conditions and location of the leak, it may take anywhere from minutes to days for the
dye to penetrate a leak and become visible.
Electronic Refrigerant Leak Detector
AJS00093
PRECAUTIONS FOR HANDLING LEAK DETECTOR
When performing a refrigerant leak check, use a J-41995 A/C leak
detector or equivalent. Ensure that the instrument is calibrated and
set properly as per the operating instructions.
The leak detector is a delicate device. In order to use the leak detec-
tor properly, read the operating instructions and perform any speci-
fied maintenance.
SHA196FA
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст