Specifications - Jeep J-10 Series 1982 Technical & Service Manual

3E-28 AIR CONDITIONING
SPECIFICATIONS
Torque Specifications
Service Set-To Torques should be used when assemblingcomponents. Service In-Use Recheck Torques should be used for checking a pre-tightened item.
Service
Set-To
Torque
A/C Service Valve (Rototype). 15
Clutch Retaining Nut 27
Cylinder Head Cap Screws 24
Discharge Hose Fitting 20
Oil Filler Plug 24
Suction And Discharge Hose Adapter Plate Bolt 21
All Torque values given in foot-pounds and newton-meters with dry fits unless otherwise specified.
USA (ft-lbs)
Metric (N m)
Service
Service
» In-Use Service In-Use
o Recheck Set-To Recheck
te Torque Torque
Torque
Wet 13-17
Torque 13 17
20 17-24
25-30 37
34-39
22-25 33 30-34
18-22
27 24-30
22-25 33 30-34
17-25 29
23-34
81145
SERVICE PROCEDURES -
EIGHT-CYLINDER ENGINE
COMPRESSOR AND
MAGNETIC CLUTCH
Pigs
Back Plate 0-RIng Seal Replacement 3E-30
Bottom Plate Gasket Replacement 3E-31
Checking Compressor Oil Level 3E-31
Compressor Belt Tension 3E-29
Compressor Front Seal Replacement 3E-29
Compressor Installation 3E-29
Compressor Mounting 3E-28
Compressor Removal 3E-29
GENERAL
This section consists of a general description and ser
vice procedures for the compressor and magnetic clutch
used on eight-cylinder engines. All other information
can be found in the Cherokee, Wagoneer and Truck Air
Conditioning section or the General Information and
Refrigerant Handling section of this chapter.
SYSTEM OPERATION
The compressor increases the pressure and temper
ature of the system refrigerant. The heated refrigerant
vapor is then pumped into the condenser where it cools
by giving off heat to air passing over the condenser fins.
As the refrigerant cools in the condenser, it condenses
into a liquid. Still under high pressure, the liquid refrig
erant passes into the receiver. The receiver acts as a
reservoir to furnish refrigerant to the expansion valve at
ail times. From the receiver, the high pressure liquid
refrigerant passes to the expansion valve. The expansion
valve meters refrigerant into the evaporator where a
Compressor Valve Leak Diagnosis
General
Head. Valve Plate and Gasket Replacement
Isolating the Compressor
Magnetic Clutch
Purging Compressor of Air
Specifications
System Operation
Page
3E-28
3E-28
3E-31
3E-29
3E-32
3E-32
3E-36
3E-28
low pressure is maintained by the suction side of the
compressor. As it enters the evaporator, the refrigerant
immediately begins to boil by absorbing heat from the
air passing over the evaporator core. Having given up its
heat to boil the refrigerant, the air is cooled and passes
into the passenger compartment of the vehicle. From
the evaporator the vaporized refrigerant is drawn back
to the compressor to repeat the cycle.
COMPRESSOR MOUNTING
The mounting bracket used on the eight-cylinder en
gine is as follows (fig. 3E-31).
COMPRESSOR VALVE LEAK DIAGNOSIS
The compressor should be at operating temperature to
perform an accurate test.
(1) Install pressure gauge and Manifold Assembly
J-23575.
(2) Front-seat the suction and discharge service
valve by turning them clockwise.