Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Jeep Cherokee XJ 1988-1989.1993-1995 Approved 1994 XJ Jeep Cherokee 94XJ_24
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J HEATING AND AIR CONDITIONING 24 - 1
HEATING AND AIR CONDITIONING
CONTENTS
page page
CLIMATE CONTROL SYSTEM--XJ VEHICLES . 22 SERVICE DIAGNOSIS--ELECTRICAL . . . . . . . . 14
CLIMATE CONTROL SYSTEM--YJ VEHICLES . 37 SERVICE DIAGNOSIS--MECHANICAL . . . . . . . . 8
COMPRESSOR OVERHAUL . . . . . . . . . . . . . . . 17 TORQUE SPECIFICATIONS . . . . . . . . . . . . . . . . 45
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . 1
GENERAL INFORMATION
INDEX
page page
A/C Operation . . . . . . . . . . . . . . . . . . . ... . . . . . . 1 Service Valves . . .... . . . . . . . . . . . . . . . . . . . . . 3
Compressor Oil Level . . . . . . . . . . . . . ... . . . . . . 6 System Charge . . .... . . . . . . . . . . . . . . . . . . . . . 5
Pressure Gauge and Manifold Assembly .. . . . . . . 2 System Discharge .... . . . . . . . . . . . . . . . . . . . . . 4
Refrigerant (R-12) . . . . . . . . . . . . . . . . ... . . . . . . 1 System Evacuation ... . . . . . . . . . . . . . . . . . . . . . 4
Service Precautions . . . . . . . . . . . . . . . ... . . . . . . 2
A/C OPERATION GOGGLES WHEN SERVICING ANY PART OF THE
The compressor increases the pressure and temper- REFRIGERANT SYSTEM. IF EYE CONTACT IS
ature of the refrigerant. The heated refrigerant vapor MADE, APPLY A FEW DROPS OF MINERAL OIL TO
is then pumped into the condenser where it cools by THE EYES AND FLUSH WITH WATER FOR SEV-
the air passing over the condenser fins. As the refrig- ERAL MINUTES. SEEK MEDICAL ATTENTION IMME-
erant cools in the condenser, it condenses into a liq- DIATELY.
uid. Still under high pressure, the liquid refrigerant
passes into the receiver. The receiver acts as a reser- The refrigerant used in the air conditioner system
voir to furnish refrigerant to the expansion (H) valve is Refrigerant-12 (R-12). R-12 is nonexplosive, non-
at all times. From the receiver, the high pressure liq- flammable, non-corrosive, has practically no odor and
uid refrigerant passes to the expansion (H) valve. is heavier than air. Although it is classified as a safe
The expansion (H) valve meters refrigerant into the refrigerant, certain precautions must be observed to
evaporator where a low pressure is maintained by protect the parts involved and the person who is
the suction side of the compressor. As it enters the working on the unit. Liquid R-12, at normal atmo-
evaporator, the refrigerant immediately begins to sphere pressures and temperatures, evaporates so
boil by absorbing heat from the air passing over the quickly that it has the tendency to freeze anything it
evaporator core. Having given up its heat to boil the contacts.
refrigerant, the air is cooled and passes into the pas-
senger compartment of the vehicle. From the evapo- WARNING: TO AVOID A DANGEROUS EXPLOSION,
rator the vaporized refrigerant is drawn back to the NEVER WELD OR STEAM CLEAN NEAR AIR CON-
compressor to repeat the cycle. DITIONING LINES OR COMPONENTS. DO NOT
HEAT R-12 ABOVE 52◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo