Subaru 2002 IMPREZA Service Manual page 2495

D: PREPARATION TOOL
CAUTION:
When working on vehicles with the HFC-134a
system, only use HFC-134a specified tools and
parts. Do not mix with CFC-12 tools and parts. If
HFC-134a and CFC-12 refrigerant or compres-
sor oil is mixed, poor lubrication will result and
the compressor itself may be destroyed.
Tools and Equipment
Wrench
Various WRENCHES will be required to service any A/C system. A 7
to 40 N·m (0.7 to 4.1 kgf-m, 5 to 30 ft-lb) torque wrench with various
crowfoot wrenches will be needed. Open end or flare nut wrenches will
be needed for back-up on the tube and hose fittings.
Applicator bottle
A small APPLICATOR BOTTLE is recommended to apply refrigerant
oil to the various parts. They can be obtained at a hardware or drug
store.
Manifold gauge set
A MANIFOLD GAUGE SET (with hoses) can be obtained from either a
commercial refrigeration supply house or from an auto shop equipment
supplier.
Refrigerant recovery system
A REFRIGERANT RECOVERY SYSTEM is used for the recovery and
reuse of A/C system refrigerant after contaminants and moisture have
been removed from the refrigerant.
GENERAL DESCRIPTION
In order to help prevent mixing HFC-134a and
CFC-12 parts and liquid, the tool and screw
type and the type of service valves used are dif-
ferent. The gas leak detectors for the HFC-134a
and CFC-12 systems must also not be inter-
changed.
Tool & screw type
AC-17
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
HFC-134a
Millimeter size
Valve type Quick joint type
Description
CFC-12
Inch size
Screw-in type
G4M0571
G4M0572
G4M0573
G4M0574