How to wire and plumb the air suspension compressor on the tow assist kit
First thing you wanna do is decide where you’re going to mount your airmaxxx air ride compressor. It’s a weather resistant air ride compressor so it can be mounted under your vehicle too. If you have room, the engine compartment is another great spot to put it. This is a oil-less compressor so it can be mounted in any position but to maximize performance and heat dissipation, it is recommended that the compressor be mounted sitting upright. After you find an ideal location for your air suspension compressors, its time to run your power wire. You will need 8g wire as the main power wire (wire needs to be connected to your positive terminal on the battery) and a 40amp fuse. Anything smaller than 8 gauge wire will compromise the life of your compressor. At this point you can also run a 16 gauge wire to your 3 prong momentary switch center pin.
airmaxxx AM400 series air ride compressor, you will need a 1/4″npt female to a 1/4″ hose connector to attach at the end of the leader hose coming off the air suspension compressor (you will need a 3/8″npt female to a 1/4″ hose connector if you’re installing the airmaxxx AM480 or AM580 series).
Next you will install the 3 tee fittings we included. You will see that one tee is different than the other 2, this is the first one we will install At this time apply a drop of liquid thread sealant on the 1/4 male NPT side of the of the tee and attach the brass valve. The valve is a one way valve so make sure the arrow at the bottom of the valve is pointing away from the tee fitting. The exhaust end of the valve will be open, nothing needs to be placed on that end. Cut whatever length 1/4″ hose you need and install one end into the fitting at the end of the leader hose and the other end into the bottom of the tee you just attached to brass valve. The next piece of 1/4″ hose connects to the top of the same tee fitting with the brass valve and the other end of hose connects to the second tee fitting. The center arm of this second tee fitting attaches to the back of your air gauge. Now you will be able to connect a piece of 1/4″ hose to the top of this second tee and put the other end into the center arm of your third and final tee. Each end of this third tee will then go directly to the elbow fittings at the top of the air bag.
You may have noticed that the sizes of our fittings include the letters “NPT”. NPT stands for National Pipe Thread and indicates tapered threads on liquid & air filled pipes and fittings. When compared to standard threads that are found on a regular bolt, a taper thread will pull tight and create a stronger air tight seal at the connection.
When installing the DOT air hose into the tubing you want to make sure you have a clean, straight cut. Use a cutting tool to accomplish that, do not use scissors or a pocket knife (https://youtu.be/Us3d9XbdGPE). Once you have a clean cut, push the tube into your fitting and then give it a little tug to make sure its locked into place.
If you would like a printable diagram, click here.