Converting A/C To Onboard Air

The evening of Monday March 5th my a/c was converted to On Board Air.   It would have cost more to fix the Air Conditioner that it would have to convert it to On Board Air.  Knowing that I would use the On Board Air much more often than I would use the air conditioning in the Cherokee, converting was an easy decision to make.  I owe a  big thanks to Gary and Hugh.  With the use of Gary's shop and Gary running the operation, Gary and Hugh converted my my a/c to On Board Air in about 2 hours.  I have listed the parts that we used below, pictured them and noted where they can be purchased.  I have done my best to write this up and list all parts that were needed.  Hopefully this will give anyone a guideline and help them determine what parts to start with.

Part Picture Part Name Purchased At

Air Filter.jpg (184114 bytes)

Air Filter

Airware, Inc
Lynnwood, WA

Reducer Air Filter to Oiler crop.jpg (27664 bytes)

1/2 inch female to 1/4 inch male reducer

Lowes or Home Base

Inline Oiler.jpg (29683 bytes)

In Line Oiler (using regular motor oil)

Airware, Inc 
Lynnwood, WA

5 lb Fire Extinguisher (used as the air tank)

Received From Friend Clay
Other tanks can be found through
Harbor Freight Catalog, or through
other companies listed in the
advertisements in JP Magazine.

Air Tank Fitting.jpg (190257 bytes)

1/2 Inch 90 degree bent pipe
1/2" male to 1/4" female adapter
1/4" to 1/4" male adapter

Lowes or Home Base

Air Coupler Plugs

Lowes or Home Base

quarter inch pipe.jpg (8807 bytes)

male to male quarter inch 1" pipe

Lowes or Home  Base

Pressure Switch.jpg (67058 bytes)

Pressure Switch
Pressure Switch Box.jpg (217406 bytes)
Info From The Pressure Switch Box
Note, this is a 120v switch

Airware, Inc
Lynnwood, WA

Air Hose.jpg (213597 bytes)

2 Air Hose (50 feet each)

Costco

12' Coil Hose

Swap Meet (can be found at
Lowes or  Home Base)

Tire Chuck.jpg (207466 bytes)

Levered Tire Chuck (Always Closed)

Napa

Wire 18 gage? Lowes or Home Base
thread nipple.jpg (61192 bytes) 1/4 inch hose barb Lowes or Home Base
seal tape.jpg (61805 bytes) Thread Seal  Tape Lowes or Home Base

toggle switch.jpg (16808 bytes)

Heavy Duty Toggle Switch

Schucks Auto Supply

4 1/2" hose clamps  (2 for the incoming air hose, 2 for attaching the incoming air hose to the Pressure Switch)

Lowes or Home Base

p1010001.jpg (208067 bytes) The engine compartment before any work was started on converting the a/c to onboard air.
p1010005.jpg (206801 bytes) The pipe was pulled off the ???.  Oil sprayed all over.  You may want to release the pressure before doing this.
p1010006.jpg (197716 bytes) The air filter, 1/2 female to 1/4 male reducer, in line oiler were attached to the pipe that had been disconnected.  We had to thread the inside of the pipe to be able to connect the air filter & oiler.
p1010008.jpg (201094 bytes) The inside of the Pressure Switch Box.  The blue wire from the lower right was cut from the air compressor.  The upper right is where the wire was attached that went to the Heavy Duty Toggle Switch that was placed inside the Jeep.
Air Tank Fitting.jpg (190257 bytes) We attached the 1/2 90degree bent pipe to the fire extinguisher bottle.   A 1/2" male to 1/4" female adapter was then put into place.  A 1/4" to 1/4" male adapter was attached to that.  The whole line up was then attached to the Pressure Switch.
The pipe that went from the compressor to the ??? was cut.  We attached a hose from the pipe and connected it to the Pressure Switch.
p1010009.jpg (193842 bytes) Of the 4 available holes, 3 were used.  The other was plugged with the one of the plugs that came with the Pressure Switch.  One to attach the fire extinguisher, one for the quick disconnect to attach the air hose which had the pipe which was a 1" long 1/4" male to male ends, and one for the black hose which is the incoming air from the air compressor using a 1/4 inch thread/nipple and clamps to attach the hose.
The On Board Air installed and working.

Update 03-12-01
I was able to use the onboard air this weekend.  It worked great!!!  The only thing that was a bit difficult was using the 50' hose to air up.  While it worked great to have the length to air up someone elses tire on the trail, the hose was a bit long and a pain to coil up.  I picked up a spiral coil hose at the Swap Meet for $2.   The oiler above does not have much oil.  I picked up a lubricator that will hold abour 1/4 cup of oil along with a regulator at the Swap Meet, neither of which had been used.  It was too good of a deal to pass up.  I will update when these parts are added to the conversion.