Handling Precautions For Gas–Cylinder Type Gas Leak Tester; Precautions When Replacing Parts In Refrigerant Line - Toyota HILUX 1993 Repair Manual

AC–4
AIR CONDITIONING SYSTEM
Handling Precautions for Gas–Cylinder Type Gas
Leak Tester
1. BEFORE USING TESTER MAKE SURE THAT THERE ARE
NO FLAMMABLE SUBSTANCES NEARBY
2. BE CAREFUL NOT TO INHALE POISONOUS GAS
If refrigerant gas comes in contact with flame, a poison–
ous gas is produced. During leak tests, do not inhale any
gas.
Precautions When Replacing Parts in
Refrigerant line
1. RECOVER REFRIGERANT IN SYSTEM BEFORE REMOV–
ING PARTS
Using a recovery machine, recover refrigerant in system
before removing the parts.
NOTICE: Do not release refrigerant to atmosphere.
2. INSERT PLUG IMMEDIATELY IN DISCONNECTED PARTS
Insert a plug immediately in the disconnected parts to
prevent the entry of moisture and dust.
3. DO NOT REMOVE PLUG FROM NEW PARTS UNTIL IM–
MEDIATELY BEFORE INSTALLATION
4. DO NOT USE BURNER FOR BENDING OR LENGTHENING
OPERATIONS ON TUBE
If the tubes are heated with a burner, a layer of oxidation
forms inside the tube, causing the same kind of trouble
as an accumulation of dust.
5. DISCHARGE GAS IN NEW COMPRESSOR FROM
CHARGING VALVE BEFORE INSTALLING IT
If the gas in new compressor is not discharged first, com–
pressor oil will spray out with gas when the plug is re–
moved.
6. TIGHTEN CONNECTING PARTS SECURELY
Securely tighten the connecting parts to prevent leaking
of refrigerant gas.
Apply a few drops of compressor oil to 0–ring fittings
for easy tightening and to prevent leaking of refriger–
ant gas.
Tighten the nuts using two wrenches to avoid twisting
the tube.
– General Information