Air Conditioning System; Refrigeration System Information - Toyota HILUX 1993 Repair Manual

AC–2

AIR CONDITIONING SYSTEM

GENERAL INFORMATION
REFRIGERATION SYSTEM
Prevention of Refrigerant Release and Excessive quantities
Refrigerant (CFCs) for automobile air conditionings is be–
lieved to cause harm by depleting the ozone layer which
helps to protect us from the ultraviolet rays of the sun.
Therefore, it is necessary to prevent release of refrigerant
to the atmosphere and to use the minimum amount when
servicing the air conditioning.
1. USE RECOVERY MACHINE TO RECOVER REFRIGERANT
When discharging refrigerant from the system as follows,
use a recovery machine to recover the refrigerant.
Before replacing parts on the refrigerant line.
When moisture or air gets in the refrigerant line.
When excess refrigerant is charged.
NOTICE:
2. USE CHARGING HOSES WITH STOP VALVE WHEN
INSTALLING MANIFOLD GAUGE SET
To prevent release of refrigerant, using charging hoses
with a stop valve when installing the manifold gauge set
to the service valves on the refrigerant line.
3. TIGHTEN CONNECTING PARTS SECURELY
Follow the notices about tightening connecting parts in
step 6 on page AC–4.
4. PROPERLY EVACUATE AIR FROM REFRIGERANT
SYSTEM
To prevent release and wasteful use of refrigerant, evac–
uate air with care from refrigeration system as follows;
Do not evacuate before recovering refrigerant in
system.
– General Information
When handling the recovery machine, always follow
the directions given in the instruction manual.
After recovery, the amount of compressor oil removed
must be measured and the same amount added to the
system.