Checking For Leaks - Jeep J-10 Series 1982 Technical & Service Manual

3E-16 AIR CONDITIONING
Evacuation Procedure with J-23500-01 Portable Air
Conditioning Service Station
The J-23500-01 Portable Air Conditioning Service Sta
tion (fig. 3E-15) is a completely portable station equip
ped with vacuum pump, metering-charging cylinder,
refrigerant supply, gauges, hoses and hand control
valves.
The control switch for the vacuum pump is mounted
on the front of the charging station. It should be in the
Off position before inserting plug into the power source.
NOTE: Be certain system is completely depressurized
before evacuating. With the system underpressure, re
frigerant may enter the vacuum pump and damage the
pu mp.
(1) Close all hand valves.
(2) Connect red charging hose to discharge service
valve port on compressor.
(3) Connect blue charging hose to suction service
valve port on compressor.
(4) Discharge system, leaving suction and discharge
service valves in the mid- or cracked-position.
(5) Connect vacuum pump hose to vacuum pump
inlet.
(6) Open low pressure hand control valve and high
pressure hand control valve on charging station.
(7) Start vacuum pump and open vacuum control
valve; note compound gauge reading.
(8) Operate pump minimum of 30 minutes after
reaching lowest vacuum.
(9) Fill charging cylinder, as described below, while
system is evacuating.
(10) Close vacuum control valve and stop vacuum
pump. Observe blue compound gauge to determine if
leak exists. System is now ready for charging.
CHECKING FOR LEAKS
Whenever a system requires more than 1/2 pound of
refrigerant after a season's operation, a serious leak is
indicated which must be located and repaired.
Most leaks will be located at points of connection and
are caused by automobile vibration. Correction of this
type of leak may only require retightening of the con
nection. However, some leaks may occur only at periods
of high traffic on a very warm day. This type of leak
most often occurs through the compressor shaft seal or
service valve gasket.
RED HIGH HIGH
PRESSURE PRESSURE
GAUGE VALVE
VACUUM
PUMP
CYLINDER
GAUGE
TOP
CYLINDER
VALVE
CHARGING
CYLINDER
PLASTIC
SHROUD
LIQUID
SIGHT
GLASS
REFRIGERANT
CONTROL
VALVES
REFRIGERANT
HEATER
SWITCH
80683
Fig. 3E-15 Typical Connections for Portable Air Conditioning Service Station J-23500-01