Flushing System - Jeep J-10 Series 1982 Technical & Service Manual

A system must contain an adequate quantity of re
frigerant to be properly leak tested. If a system is com
pletely discharged, evacuate and install 1/2 pound of
refrigerant.
Halide Torch Leak Detection
External leaks are detected and located with a Halide
Torch Tool J-6084 (fig. 3E-16). The torch burns propane
fuel and is equipped with a search hose. When air is
drawn into the hose by the torch, it contacts a heated
copper reactor ring in the torch. If refrigerant gas is
present in the air, the normally light blue flame will
change color. A small refrigerant leak will change the
flame color to yellow. A large'refrigerant leak will
change it to green or purplish-bkie.
REACTOR
PLATE
GAS CONTROL
KNOB
STOVE
AJ41495
Fig. 3E-16 Halide Torch Tool J-6084
Leak Test Procedure Using Halide Torch
(1) Open torch valve and light torch, adjusting
flame just high enough to heat copper reactor ring to a
cherry red.
(2) Lower flame until it is about 1/4 inch above or
even with copper reactor ring. Smaller flame is more
sensitive to refrigerant.
AIR CONDITIONING 3E-17
•••i •
(3) Move search hose slowly under all connections,
joints and seals. Because refrigerant is heavier than air,
leaks may be more readily detected on lower side of
areas being checked.
(4) Watch for color change of flame indicating area
of leak.
WARNING: When R-12 refrigerant comes into contact
with an open flame, phosgene gas is formed. NEVER
INHALE THE VAPORS OR FUMES FROM THE
HALIDE TORCH; they are poisonous.
(5) Repair leaks as required.
(6) Evacuate and leak-test system after all leaks are
corrected.
(7) Charge system.
Electronic Leak Detection
External leaks are detected and located with the Elec
tronic Leak Detector Tool J-26933. The leak detector is
an electronic instrument designed to detect R-12 refrig
erant leaks as small as one-half ounce per year. The 18-
inch flexible probe gets at inaccessible places. Follow the
manufacturer's calibration instructions, included with
the unit, to set up the electronic leak detector for proper
operation.
NOTE: Using the Electronic Leak Detector Tool
J-26933, will NOT expose the user to phosgene gas va
pors or fumes.
Leak Test Procedure Using Electronic Detector
(1) Unwind flexible probe from case.
(2) Activate Off/On switch, place flexible probe tip
near leak port and adjust BAT thumbwheel a few teeth
until light goes on and goes out when tip is removed
from leak port.
(3) Move flexible probe slowly under suspected con
nections, joints, and seals. R-12 refrigerant is heavier
than air, leaks may be detected more readily on lower
side of areas being checked.
(4) When a leak is found, its presence will be in
dicated by white signal light.
NOTE: // probe tip is held too long on the leak, the
white signal light will go out.
(5) Repair leaks, as required.
(6) Evacuate system after all leaks are corrected.
(7) Charge system.
FLUSHING SYSTEM
Anytime a failure of the compressor causes foreign
material to be passed into the system, the condenser
must be flushed and the receiver/drier replaced. Filter
screens in the compressor at the suction side and in the
receiver/drier will confine foreign material to the com
pressor, condenser, receiver/drier and connecting hoses.