3. USE OF PROPER O±RINGS AND SEALS
O±rings and seals used for conventional CFC12 air condi-
tioning systems cannot be used for HFC134a air conditioning
systems.
Always use genuine Toyota HFC134a system O±rings and
seals for HFC134a air conditioning systems.
If O±rings and/or seals for CFC12 air conditioning systems
are used by mistake in the connections of an HFC134a air
conditioning system, the O±ring and seals will foam and swell
resulting in leakage of refrigerant.
4. TIGHTEN CONNECTING PARTS SECURELY
Securely tighten the connecting parts to prevent leaking of
refrigerant gas.
wApply a few drops of compressor oil to O±ring fittings for
easy tightening and to prevent leaking of refrigerant
gas.
CAUTION: Apply only ND±OIL 8 compressor oil.
wTighten the nuts using 2 wrenches to avoid twisting the
tube.
wTighten the O±ring fittings or the bolted type fittings to
the specified torque.
5. INSERT PLUG IMMEDIATELY IN DISCONNECTED PARTS
Insert a plug immediately in the disconnected parts to pre-
vent the ingress of moisture and dust.
6. DO NOT REMOVE PLUG FROM NEW PARTS UNTIL
IMMEDIATELY BEFORE INSTALLATION
7. DISCHARGE GAS IN NEW COMPRESSOR FROM
CHARGING VALVE BEFORE INSTALLING IT
If the gas in the new compressor is not discharged first, com-
pressor oil will spray out with gas when the plug is removed.
± AIR CONDITIONING SYSTEMGENERAL DESCRIPTIONAC±3
