check oil MITSUBISHI MONTERO 1987 1.G Owner's Manual

AIR-CONDITIONING -Service Adjustment Procedures 24-41
COMPRESSOR NOISE NWLM
When investigating an air conditioning related noise, you must first know the conditions when the noise occurs.
These conditions are: weather, vehicle speed, in gear or neutral, engine temperature or any other special
conditions.
Noises that develop during air- conditioning operation can often be misleading. For example: what sounds like a
failed front bearing or connecting rod, may be caused by loose bolts, nuts, mounting brackets, or a loose clutch
assembly. Verify accessory drive belt tension (power
steering, alternator or air pump). Improper accessory drive belt
tension can cause a misleading noise when the compressor is engaged and little or no noise when the compressor
is disengaged.
Drive belts are speed sensitive. That is, at different engine speeds, and depending upon belt tension, belts can
develop unusual noises that are often mistaken for mechanical problems within the compressor.
Adjustment Procedures
(1) Select a quiet area for testing. Duplicate conditions as much as possible. Switch compressor on and off several
times to clearly identify compressor noise.
To duplicate high ambient conditions (high head pressure), restrict air-flow through
condenser. Install
manifold gauge set to make sure discharge pressure does not exceed 2,070 kPa (300 psi).
(2) Tighten all compressor mounting bolts, clutch mounting bolt, and compressor drive belt. Check to assure clutch
coil is tight (no rotation or wobble).
(3) Check refrigerant hoses for rubbing or interference that can cause unusual noises.
(4) Check refrigerant charge (See “Charging the System”).
(5) Recheck compressor noise as in Step 1.
(6) If noise still exists, loosen compressor mounting bolts and retorque. Repeat Step 1.
(7) If noise continues, replace compressor and repeat Step 1.
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AIR-CONDITIONING - Compressor 24-47
SERVICE POINTS OF DISASSEMBLY N24TFAE
5. REMOVAL OF ROTOR ASSEMBLY
It may be necessary to lightly tap the rotor with a plastic
hammer.
2OY713
Front housing
Shaft pl&e
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I MB990?83-01 2OY790
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INSPECTION N24TGAC
l
Check the surface of the clutch hub for scoring or bluing.
l Check the surface of the rotor for scoring or bluing.
l Check the sealing surfaces for cracks, scratches and deforma-
tion.
l Check the front housing for cracks or scoring on the sealing
surfaces.
l Check the compressor shaft for scoring.
SERVICE POINTS OF REASSEMBLY N24THAH
14. INSTALLATION OF SHAFT PLATE
(1) Lubricate the shaft plate and a new O-ring with
compressor oil. Push the shaft plate and O-ring into the
front housing.
(2) Install the seal plate into the front housing with a
special tool.
13. INSTALLATION OF SHAFT SEAL
Lubricate the shaft seal with compressor oil. Install the
shaft seal on the shaft.
NOTE
Rotate the shaft seal lightly by hand to check that it is
fitted into the notch on the compressor shaft. evision
r

,: 24-48 AIR-CQNDITIONING - Compressor
I
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1 iOY718 l
REFILL OF COMPRESSOR OIL
Fill 110 cc. (3.7 U.S. fl.oz., 3.9 Imp.fl;oz.) specified compressor
oil from the suction hole side and install the flange fitting
assembly.
Specified oil : DENS0 oil 6
8. INSTALLATION OF CLUTCH COIL
The clutch coil must be aligned with the pin in the
compression housing.
. ADJUSTMENT OF CLUTCH CLEARANCE
(1) Check the pressure plate to rotor clearance as illus-
trated.
Pressure plate to rotor clearance :
0.4-0.7 mm (.016-.028 in.)
NOTE
Remove clearance adjusting shims to decrease clutch
clearance. Add shims selected from the following table
to increase clutch clearance.
Clearance Adjustment Shims
Part No. Thickness
RSI 3023A 0.1 mm (.004 in.).
RSI 3023B 0.2 mm (.008 in.)
RSI 3024 0.5 mm (.020 in.)
(2) Turn the rotor by hand to confirm that it rotates freely.
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RJST608009-284
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