General Tool

CAUTION:

Use only tools and parts dedicated to the HFO-1234yf system. If other types of refrigerant or compressor oil are mixed, it will result in poor lubrication and the compressor may be damaged.
In order to prevent the mixture of other parts, grease or oil, the types of tools and screws and the replacement valves used are different. Use tools and parts appropriate for the system.

	HFO-1234yf	HFC-134a	CFC-12
Tool and screw type	Millimeter size	Millimeter size	Inch size
Valve type	Quick joint type	Quick joint type	Screw-in type

TOOL NAME/ILLUSTRATION	REMARKS
Circuit tester	Used for measuring resistance and voltage.
DST-i	Used together with Subaru Select Monitor 4.
Clip remover	Used for removing clips.
Wrench Courtesy of SUBARU OF AMERICA, INC.	Various wrenches will be required to service any A/C system. 7 - 40 N.m (0.7 - 4.1 kgf-m, 5 - 30 ft-lb) torque wrench and various crowfoot wrenches will be needed. Open end or flare nut wrenches will be needed to affix the pipe and hose fittings.
Applicator bottle Courtesy of SUBARU OF AMERICA, INC.	A small applicator bottle is recommended to apply compressor oil to the various parts. It can be available at a hardware store.
Manifold gauge set Courtesy of SUBARU OF AMERICA, INC.	A manifold gauge set (with hoses) is available at either a refrigerant supplier or an automotive equipment supplier.
Refrigerant recovery system Courtesy of SUBARU OF AMERICA, INC.	A refrigerant recovery system is used for the recovery and recycling of A/C system refrigerant after contaminants and moisture have been removed from the refrigerant.
Syringe Courtesy of SUBARU OF AMERICA, INC.	A graduated plastic syringe will be needed to add oil into the system again. A syringe can be available at a pharmacy or drug store.
Vacuum pump Courtesy of SUBARU OF AMERICA, INC.	A vacuum pump is necessary (for a good working condition), and may be available at either a refrigerant supplier or an automotive equipment supplier.
Can tap Courtesy of SUBARU OF AMERICA, INC.	A can tap for refrigerant cans is available at an automotive equipment supplier.
Thermometer/hygrometer Courtesy of SUBARU OF AMERICA, INC.	A pocket thermometer/hygrometer is available at either an industrial hardware store or a refrigerant supplier.
Electronic leak detector Courtesy of SUBARU OF AMERICA, INC.	An electronic leak detector is available at either a specialty tool supplier or an A/C equipment supplier.
Weight scale Courtesy of SUBARU OF AMERICA, INC.	A weight scale such as an electronic charging scale or a bathroom scale with digital display will be needed, if a 13.6 kg (30 lb) refrigerant container is used.