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VXO8560/4124B 

INSTALLATION GUIDE

 
 

 

PAGE 3 of 5

 

 

ON-BOARD AIR SYSTEM 

MOUNTING 

  Determine a dry place to mount your on-board air system. If you have chosen to install in the engine 

compartment, you should mount it as close to the front as possible to allow for maximum flow of air around 
compressor and also to avoid heat from the exhaust.  

IMPORTANT

: Never attach the system to any plastic or 

other flexible material. 

  For optimal results, the compressor should be placed as close to the battery as possible. This will reduce the 

amount of wiring needed. 

  Avoid placing compressor near flammable liquids. 

  For proper heat dissipation of the compressor never install the on-board air system upside down. 

  Mark the spots for the holes with the mounting base as a guide and then drill. Make sure the system is 

secured. 

 

CHECK VALVE 

  The check valve is an important part of the air compressor and has only one function: to let air flow from one 

side to the other, in this case from the compressor to the tank, while blocking air flow in the opposite direction.  

 

IMPORTANT

: Do not rotate or remove the inline check valve located at the end of the hose on the side that 

connects to the air tank. Doing so will damage its seals and will result in damage to your air compressor. 

 

THERMAL OVERLOAD PROTECTION 

  The compressor has Thermal Overload Protection, if this protection activates, cut off the source of power and 

let the unit cool down for about 30 minutes. This will reset the system and allow you to safely resume use of 
the air compressor. 

 

PRESSURE SWITCH RATING 

  The included pressure switch has a rating of 120 PSI ON, 150 PSI OFF. When the air pressure in the air tank 

is below the preset ON pressure (120 PSI), the compressor will automatically turn on and will start pumping 
air into the tank. When the pressure reaches the cut OFF pressure (150 PSI), the compressor will be 
automatically shut off. 

  In this system your Pressure Switch is already wired to the air compressor. Do not modify this connection. 

 

AIR PRESSURE GAUGE 

  Your system includes a 240 PSI Pressure Gauge that will measure the air pressure of the tank. 

  The air pressure gauge is a sensitive part of the system, please avoid dropping, hitting or tighten it to the tank 

using a method other than the brass nut located in the back. 

 

SAFETY VALVE 

  Your system comes with a safety valve designed specifically to release pressure from the air tank 

automatically if 175 PSI is exceeded. This will help prevent an accident in case of pressure switch failure. 

 
DRAIN NUT 

  This nut helps you drain the water that can collect in the air tank after long periods of use. 

REMOVING CONDENSATION

 

To remove any condensation which has accumulated inside the tank, bleed the tank’s pressure until it ranges 
from approximately 5 PSI to 20 PSI. 

 

Remove the drain nut found at the tank’s bottom to drain the water from the tank. After draining the 
accumulated condensation, apply thread sealant 

to the nut’s thread and reinstall it. 

 

IMPORTANT

: Draining the system regularly will extend the life of the air tank. 

Summary of Contents for VXO8560/4124B

Page 1: ...ut 1 4 NPT Compression Fitting for 1 4 OD Air Line 1 4 OD Nylon Plastic Hose 6 Feet 30A In line Fuse Horn Button Mounting Hardware SAFETY INSTRUCTIONS Do not attempt to disassemble repair or customize this product Avoid setting up any parts of this product where there is a risk of falling off or risk of coming in contact with water Avoid reaching out to touch or pick up any fallen or water submerg...

Page 2: ...that your air system has no pressure before you begin PLANNING YOUR INSTALLATION Before beginning the installation determine each component s spot Confirm you have the proper length of airline and wire Power wire to on board air system should be kept short To power up the on board air system make sure you use a 12 gauge wire or thicker HORN MOUNTING Identify a suitable area for mounting preferably...

Page 3: ...wn for about 30 minutes This will reset the system and allow you to safely resume use of the air compressor PRESSURE SWITCH RATING The included pressure switch has a rating of 120 PSI ON 150 PSI OFF When the air pressure in the air tank is below the preset ON pressure 120 PSI the compressor will automatically turn on and will start pumping air into the tank When the pressure reaches the cut OFF pr...

Page 4: ... bubble solution to perform this check In case the leak remains after tightening re apply thread sealant IMPORTANT Never touch fittings braided hose or the air compressor with bare hands either during or shortly after use HORN SOLENOID USING NEW HORN BUTTON Connect one of the electric valve s wires to the positive terminal of the battery alternator etc This circuit should be protected using a 10A ...

Page 5: ...dible Solution 1 Check all switches to make sure they are ON Solution 2 Assure air tank is pressurized Solution 3 Check the fuse if blown disconnect compressor from power and replace the fuse Solution 4 Examine electrical connection for damage or corrosion secure electrical connections Issue Excessive moisture in horn Solution 1 Depressurize and drain the tank Solution 2 Relocate the on board air ...

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