oil MITSUBISHI 3000GT 1991 Service Manual

55-26HEATERS AND MANUAL AIR CONDITIONER - Evaporator
DISASSEMBLY AND REASSEMBLYM55RE- -Compressor oil: Freol S-83 or
Suniso 5GS
Disassembly steps
4*1. Clips
2. Evaporater case (upper)3.
Fin therm0 sensor4. AirInlet sensor
4*

5. Evaporator case (lower)
6.Evaporator assembly
7.Grommet8.Insulator9.Rubber insulator10.Clip11. Expansion valve
10/
9
/2OFOO40
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SERVICE POINTS OF DISASSEMBLYM55RFAJ1. REMOVAL OF CLIPS
Remove the clips with a screwdriver covered with a shoptowel to prevent damage to case surfaces.
11. REMOVAL OF EXPANSION VALVE
Loosen the flare nut by using two wrenches (for both theinlet and outlet).

HEATERS AND MANUAL AIR CONDITIONER - Compressor55-27
COMPRESSOR
M55SA- -
/REMOVAL AND INSTALLATION
iJ
iPre-removal Operation
l Discharge of the Refrigerant(Refer to P.55-14.)9.0 Nm
7.Oft.lbs.
\Post-installation Operation
l Adjustment of the Compressor
Drive Belt (Refer to GROUP 11 -Service Adjustment Procedures.)l Charging of Refrigerant(Refer to P.55-11.)21 Nm
15 ftlbs.Removal steps
a*1. Compressor drive belt
2. Condenser fan motor assembly
4*3. Connection of suction hose and discharge
41) l +4. !%znator (Refer to GROUP l6-Alternator.)*I) l * 5. Compressor
6. Idler pulley
7. Compressor bracket
!I zorr-rion pulley assembly;
;: Fontsion pulley
12. Adjustment plate
13. Tension pulley bracket6
45 Nm
33 ft.lbs.
52ONOO89Compressor oil:
Freol S-83 or Suniso 5GS
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55-28HEATERS AND MANUAL AIR CONDITIONER - Comtxessor
20F0067
SERVICE POINTS OF REMOVALM55SBAE1. REMOVAL OF COMPRESSOR DRIVE BELT
(1) Loosen bolt “A” for holding the tension pulley.
(2) Loosen bolt “B” for adjustment, and remove the
‘J
compressor drive belt.
3.REMOVAL OF SUCTION HOSE AND DISCHARGE HOSE
If the hoses are disconnected, cap the hoses with a blankplug to prevent entry of dust, dirt, and water.
5. REMOVAL OF COMPRESSOR
Caution
Lay the towel on the brake tube to protect them. When
install the compressor, do not damage the brake tubes.
This work must be done carefully so as not to spill the
compressor oil.
INSPECTIONM55SCAEl Checking for heat damage of the tension pulley.
l
Check for excessive play or deflection of the tension pulley.l Check for unusual wear of the tension pulley.
l Check for hardening of the air conditioner belt.
lCheck for unusual wear or abrasion of the air conditioner ,
belt.
\d’
OPERATION CHECK OF THE COMPRESSOR’S MAGNETIC
CLUTCH
(1) Connect terminal @ at the compressor side to the positive
(+) terminal of the battery, and ground the negative (-)terminal of the battery to the compressor.
(2) The condition of the compressor’s magnetic clutch can beconsidered satisfactory if the operation sound (a “click”
sound) of the magnetic clutch can be heard when this
check is made.
SERVICE POINTS OF INSTALLATIONM55SDAF5. INSTALLATION OF COMPRESSOR
If a new compressor is installed, first adjust the amount of
oil according to the procedures described below, and then
install the compressor.(1) Measure the amount (X cc) of oil within the removed
compressor.
(2) Wipe away (from the new compressor) the amount ofoil calculated according to the following formula, and
then install the new compressor.
New compressor oil amount
160 cc (9.8 cu.in.) - X cc= Y cc
NOTE
Y cc indicates the amount of oil in the refrigerant line,l/jthe condenser, the cooling unit, etc.
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HEATERS AND MANUAL AIR CONDITIONER - Compressor
DISASSEMBLY AND REASSEMBLY
55-29
M55SE- -16
152OFOO97
Magnetic clutch disassembly steps
1. Bolts
2. Pulley
l * l *3. Nutl *4. Armature plate
gI i;yirring
l *7. Snap ringF* 8. Clutch coil9. ShimsControl valve disassembly
13. Snap ring14. Control valveThermostat and revolution pick up sensor disassem-
bly steps
15. Plate16. Thermostat and revolution pick up sensorHigh pressure relief valve disassembly steps
10. Cover11. Dust cover
12. High pressure relief valveTSB Revision

HEATERS AND MANUAL AIR CONDITIONER - Compressor
Spring
Valve
ompressor
2OPO286~
SERVICE POINT OF DISASSEMBLYMSlSFAE3. REMOVAL OF NUT
Use the special tool to loosen the nut,
INSPECTIONM55SGABl Check the surface of the armature for scoring or bluing.
l Check the surface of the rotor for scoring or bluing.
l Check the sealing surfaces for cracks, scratches and
deformation.
0Check the front housing for cracks or scoring on the sealing
surfaces.l Check the compressor shaft for scoring.
J
HIGH PRESSURE RELIEF VALVE CHECK
The high pressure relief valve is a safety feature which releasesI
part of the refrigerant inside the system into the atmospherewhen the high pressure level exceeds 3,550
kPa (505 psi)
during air conditioner operation.Once the pressure inside the system has been reduced to
2,400
kPa (341 psi) or lower, the high pressure relief valveL&Jcloses, thus allowing continued operation.
(1) If a leak is detected at section A, replace the high pressure
relief valve. The valve can be used unless there is a leak(from that section.
(2) If a leak is detected at section B, retighten the valve. If the
leak still persists after retightening the valve, replace the
packing.
THERMOSTAT CHECK
(1) Dip the thermostat in engine oil.
(2) Check for continuity across terminals @ and @ when theengine oil is heated.
Standard value:Continuity at approx.
110°C (230°F) or less
at A pointNo continuity at approx. 155°C (311°F) or more
,I
at B pointII;TSB Revision

HEATERS AND MANUAL AIR CONDITIONER - Compressor55-3120N003d
2OFOO96
I
Ec-3
3180?+I! (25)zz
h34\
*
Engine speed rpm2OPO2S
\CrankshaftTapered part
20A0157
REVOLUTION PICK UP SENSOR CHECKMeasure the resistance between terminals
@ and @ of the
connector.
Normal resistance: 405 + 35 R when ambient temperatureis
20°C (68°F)
If the measurement deviates greatly from the above resis-
tance, replace the revolution pick up sensor assembly.
CONTROL VALVE CHECKThe control valve detects a low pressure level during the
operation of the air conditioner, and adjusts the amount of
refrigerant to be bypassed.
(1) Operate the air conditioner under a high temperature loadcondition (when vehicle interior temperature is high).
(2) Connect a low pressure gauge to the air compressor.
(3) Operate the air conditioner with the engine running at idle.
(4) Gradually increase the engine speed while observing the
low pressure gauge.
If the valve is normal, the low pressure drops slowly as the
engine speed increases until a pressure of 180
kPa (25 psi)
is reached, at which point the pressure temporarily ceasesto drop. Then, the pressure again starts dropping as the
engine speed further increases.If the valve is abnormal, the low pressure drops in direct
proportion to the increase in engine speed without a
temporary leveling off at the 180 kPa (25 psi) pressure level.
If the low pressure drops like this, replace the control valve.
SERVICE POINTS OF REASSEMBLYM556HAF
8. INSTALLATION OF CLUTCH COIL
Align the pin of the clutch coil with the pin hole in the fronthousing, and then fit it into the hole.
7. INSTALLATION OF SNAP RING
Install the snap ring so that the tapered surface is at the
outer side.
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HEATERS AND MANUAL AIR CONDITIONER - ::“dE:; and Condenser55-33
CONDENSER AND CONDENSER FAN MOTOR
MFSTA-A
idREMOVAL AND
IlilSTALLATlONPre-removal and Post-installation
l Discharge and Charging of the Refrigerant
l Removal and lnsiallation of the Alternator(Refey to GROUP 16 -Alternator.)
6
f: Piplng connection
@
20N00890-ring
d-ringCompressor oil: Freol S-83 or Suniso 5GS
9-11 Nm
7.0 - 8.0 ftlbs.
9’23’Nm17 ft.lbs.
asset-rRemoval steps1. Condenser fan motor
2. Fan
3. Motor assembly
4. Shroud
w w 5. Radiator fan motor assembly(Refer to GROUP 14- Radiator.)
Insulator installationbolts
6.4*7. Liquid pipe A and liquid pipe Bl *8. Condenser9.Bushings
/9.0 7.0ft.lbs. Nm2OFOO28
SERVICE POINTS OF REMOVALM!XTEtAC7. REMOVAL OF LIQUID
‘PIPE A AND LIQUID HOSE B
(1) Loosen the flare nut by using two wrenches.
(2) Plug the disconnected hose and pipes and the openingsof the condenser in order to prevent dust, dirt and other
foreign material from entering.
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HEATERS AND MANUAL AIR CONDITIONER - Rdrigerant Line55-35
REFRIGERANT LINE
/’REMOVAL AND INSTALLATION
L;Pre-removal and Post-installation Operation
l Discharge and Charging of Refrigerant(Refer to P.55-14, 11.)
Removal steps
a*1. High-pressure hosel *2. High-pressure pipe
3. Liquid pipe A
4. Liquid pipe B
5. Low-pressure hose B
6. Low-pressure hose A
7. Receiver bracket
8. Receiver
9. Dual-pressure switch23 Nm
17 ft.lbs.-\-M55UA-
-
1: Piping connection
O-ring20N0089
1
O-ringCompressor oil: Freol S-83 or Suniso 5GS
13 Nm
9.0
ft.lbs.
9.0-11 Nm7.0 -8.0 ft.lbs.
\
TE NUTII” 1.1119.0 ft.lbs.
7.0 - 8.0 ft.lbs.
/
‘Ill
q9
8
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SERVICE POINTS OF REMOVALMIBUBAC
1. REMOVAL OF HIGH-PRESSURE HOSE
/ 2. HIGH-
PRESSURE PIPELoosen the flare nut ,by using two wrenches.
INSPECTIONMHUCAD
CHECKING DUAL PRESSURE SWITCHFor information concerning the checking procedures of the dual
pressure switch, refer to “Service Adjustment Procedures” on
P.55-10.
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Pre-removal and Post-installation Operationl Draining and Refilling of Engine Coolant(Refer to GROUP 00 - Maintenance Service.)
1. Engine coolant temperature switchHEATERS AND MANUAL AIR CONDITIONER
- Z!&E%Ltch55-39
ENGINE COOLANT TEMPERATURE SWITCH
M55xA- -
L
REMOVAL AND INSTALLATIONSealant: 3M Nut Locking Part No.
4171 or equivalent
BQQQQQ20A0199INSPECTION
MSSXCAAENGINE COOLANT TEMPERATURE SWITCH
(ALWAYS-
CLOSED TYPE CHECK)
(1) Immerse the engine coolant temperature switch in oil and
heat by a gas stove or similar method so as to increase the
oil temperature.(2) Check to be sure that the engine coolant temperature
switch is switched OFF when the oil temperature reaches
the standard value.Standard value: 112
- 118°C (233 - 244°F)
CautionUse engine oil for this test; stir it well while heating,
and do not heat more than necessary.
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