Magnetic Clutch - Jeep J-10 Series 1982 Technical & Service Manual

NOTE: It is not necessary to discharge the system to
service the blower motor. The evaporator housing may
be lowered from the instrument panel to gain access to
the bloiver motor attaching screws.
Installation
(1) Push hoses through grommet opening, and in
stall grommet by pushing toward engine compartment
of vehicle and fasten to dash panel with two attaching
screws.
(2) Raise evaporator and install evaporator hous
ing-to-instrument panel attaching screws and the evapo
rator-to-mounting bracket screw.
(3) Install hose clamps and grommet attaching
screws.
(4) Connect receiver/dryer-to-evaporator hose.
(5) Connect inlet (suction) line to compressor.
(6) Evacuate, leak test, and charge system as de
scribed in General Information and Refrigerant Han
dling section of this chapter.
EXPANSION VALVE SERVICE
The valve is preset and should not be adjusted. A
defective valve requires replacement.
(1) Discharge system as described in General Infor
mation and Refrigerant Handling section of this
chapter.
(2) Remove evaporator housing assembly.
AIR CONDITIONING 3E-5
(3) Remove insulation wrapped around suction line
and expansion valve. Mark capillary tube location on
suction line.
(4) Disconnect inlet and outlet connections, cap
illary tube clamp, and equalizer tube.
(5) Remove expansion valve.
(6) Clean suction line to provide a positive contact
with replacement expansion valve capillary tube.
(7) Connect inlet and outlet hoses. Clamp capillary
tube at marked position and connect equalizer tube.
NOTE: Clamp capillary tube securely so that a firm
contact with the suction line is formed.
(8) Wrap expansion valve and line with insulation.
(9) Install evaporator housing assembly.
(10) Evacuate, leak test, and charge system as de
scribed in General Information and Refrigerant Han
dling section of this chapter.
COMPRESSOR
The compressor used on six-cylinder engines in CJ and
Scrambler models is a five-cylinder rotary unit. Refer to
the Service Procedures—Compressor and Magnetic
Clutch section for the compressor service and mounting
information.
MAGNETIC CLUTCH
Refer to the Service Procedures—Compressor and
Magnetic Clutch section for detailed information on the
magnetic clutch.
CHEROKEE - WAGONEER -
TRUCK AIR CONDITIONING
COMPONENTS AND
CONTROLS
Pige
Compressor 3E-9
Condenser 3E-7
Control Operation 3E-6
Control Panel 3E-6
Evaporator Housing Assembly 3E-8
GENERAL
When driving at normal highway speeds the Chero
kee, Wagoneer and Truck models air conditioning sys
tem will provide maximum efficiency. However, when
operating under stop-and-go city driving conditions a
slight reduction in cooling efficiency generally will be
experienced.
It is recommended that intermediate temperature and
high fan settings be used for average city driving and
intermediate temperature and medium fan settings for
highway driving.
Expansion Valve Service
General
Magnetic Clutch
Receiver/Dryer
Sight Glass
3E-8
3E-5
3E-9
3E-7
3E-7
The air conditioning system, as shown for the Wagon
eer in figure 3E-6, is also applicable to Cherokee and
Truck models.
When driving at relatively high speed for an extended
period of time, the cooling coil may possibly frost over,
resulting in a temporary loss of cooling. Should this
occur, simply turn the TEMP knob to OFF and allow the
blower to operate for a few minutes to allow the cooling
coil to defrost. Then turn the TEMP knob to a setting
which is not as cold as the setting at which frosting
occurred.