This is from an email I received from Steve. -Paul

Ok, here goes the list and an attempt at a schematic. Part numbers out of a Grainger catalog

• Filter (for the inlet to the compressor) PN 5Z766 $11.25
• Relief Valve, PN 5A709 $ 5.90
• Check Valve, PN 5x780 $ 9.10
• Oil Separator, PN 6ZC23 $49.60
• Oil Separator mounting Kit, 4Z032 $ 4.69
• Pressure gage $ 5.60

• 2 ea - 1/4fnpt - T
• 1 ea - 1/4npt - 1/4 hose
• 5 ea - 1/4 npt - 3/8 hose
• 1 ea -1/4 MPT - 1/8 fmpt adapter (for the pressure shutoff switch)
• 2 ea - 3/8 npt - 3/8 hose
• 1 ea - 1/4 npt - 1/4 fmpt ball type shutoff valve (has a small lever that can be positioned closed or open)

• 1 - metal tire valve stem. The type that has the nut, rubber washer/seal, and is used inplace of the rubber stems.
• This fitting I have to describe. I cannot find a PN for it. It is like one of the old bicycle pump fittings that screws over the tire schrader valve. One end will screw on to a schrader valve on the metal valve stem, the other will fit into 1/4" air line. It is brass and I found it at an industrial supply house in their brass fittings.
• At least 25' 3/8 air hose
• At least 10; 1/4 air hose.
• Pressure switch from Sun Performance PN PS001 (714-588-8567) $19.00 (probably can find one at a supply house but theirs works and is preset at 115 psi.
• At least one Nylon Coil Air hose 25' One air quick disconnect and air fitting to fit your nylon air hose
• Some sort of air tank. I have used the Currie tank, (about $40) , Sun Performance builds a better one, PN PA501 ($73) or any other type of tank that is made for pressure.

• Your air conditioning system has a suction line and a discharge line. I utilized both of these line, cutting the suction line and installing the inlet filter and using the discharge line to be routed to the filter. You cannot us good ol air line for this because the pump discharge is very hot and the air line will explode. !!!!
• Remove the drain plug from the oil separator and replace it with the tire valve stem. Remove the schraeder valve that is screwed into the valve stem. Apply some thread sealer to the tire valve stem and install the fitting that I describe above.
• Mount the filter in a convenient location, not too far from the pump. Mine is about 3 ft away. Route the 1/4 air line from the separator to the shutoff valve, then to the inlet filter, then to the pump inlet. (When the pump is running, it will naturally vent out some of the pump oil. The filter will separate the oil and captures in the filter bowl. At the next operation of the pump, or when the pressure is bled off, the pump is turned on for a few seconds, the valve is oened and the oil is sucked back into the pump inlet. (By the way, you need about 4-6 oz of oil in your pump. And you should use standard compressor or automotive air conditioner oil in your pump.)
• From the separation filter, go to the check valve, then to the pressure switch and gauge. I manifolded these two together in a 1/4fmpt cross fitting. Next to the pressure relief valve and tank. From the tank, you can either to some convenient place for the quick disconnect for your coiled air line or run it back to the under the hood. I suppose that you can manifold the check valve and a quick disconnect together and not run another line.

Once you get all of the pieces and start the setup, you will see how to minimize some of the hose connections and manifold parts together to make it neat.

Steve Friend