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SAFETY PRECAUTIONS:

1. Always inflate tires to manufacturer’s recommended tire pressures. Exercise extreme caution 

  when driving with aired-down tires. Reinflate tires before high-speed roadway travel.

2. Never exceed 20 M.P.H. when driving with partially inflated tires.

3. Never make sharp turns while driving with reduced tire pressure.

4. Re-inflate tires before high speed traveling onto roadways.

5. Use heat-resistant, minimum 200 PSI-rated working pressure extension hose. 

  Do not use aftermarket hoses with less than 200 PSI working pressure. Some aftermarket hoses 

 

  may not be suitable for use with this air compressor due to heat and pressure typically generated 

 

  by this type of air compressors.

IMPORTANT:

 Always use an Open-Ended tire chuck such as the tire chuck equipped on the 

Deflator/Inflator Coil Hose for tire inflation when using a compressor without an air tank.

CAUTION:

 Never touch the air compressor or fittings connected to the air compressor other than 

the ON/OFF switch with bare hands during or immediately after use. The extension hose and fittings 

connected extension hose will become very HOT during and after use. If necessary, wear heat 

resistant gloves to remove hose from the compressor quick connect stud.

RECOMMENDATION:

This compressor is equipped with a poppet pressure release head valve. Head pressure will slowly 

decrease (pressure will be released through the intake port of the compressor) to allow smooth 

re-starts under pressure. If compressor’s is hooked up to power source and if the power switch 

is left in the ON position for more than 7 to 8 minutes, Compressor will automatically turn on for a 

short duration (3 to 5 seconds) to recover pressure due to built-in pressure switch. This is a normal 

function of the compressor.  Always shut off power to the compressor when the compressor is 

 

not in use. 

MAINTENANCE & REPAIRS:

Your air compressor is equipped with permanently lubricated, maintenance-free motor. 

 

Never try to lubricate the compressor.  Regularly clean dust and dirt from compressor cooling fins 

and motor housing.  All repairs should be performed by Manufacturer or Manufacturer authorized 

service agencies only.

400P AUTOMATIC PORTABLE COMPRESSOR

USER MANUAL

Summary of Contents for HEAVYWEIGHT Series

Page 1: ......

Page 2: ... or explosive materials or where aerosol products are being used Do not operate this product where oxygen is being administered Do not pump anything other than atmospheric air Never use this product while sleepy or drowsy Do not use any tools or attachments without first determining maximum air pressure for that tool or attachment Never point any air nozzle or air sprayer toward another person or ...

Page 3: ... 155 PSI 5 During inflation of tire pressures between 130 PSI to 155 PSI if you stop inflation the compressor may not restart This is completely normal since inline pressure is greater than cut on pressure of the pressure switch and less than cut off pressure of the pressure switch To restart compressor deflate tire pressure to below 130 PSI reconnect tire chuck to tire valve stem and resume tire ...

Page 4: ...automatically turns off the motor when the internal pressure of the air compressor reaches the factory set cut off pressure of 155 PSI and restarts when the internal pressure drops below 130 PSI TIRE DEFLATION 1 Push the tire chuck with the lever in the upright position down over the tire valve stem and then push the lever down to the horizontal position to lock in place 2 Press the bleeder valve ...

Page 5: ...nds during or immediately after use The extension hose and fittings connected extension hose will become very HOT during and after use If necessary wear heat resistant gloves to remove hose from the compressor quick connect stud RECOMMENDATION This compressor is equipped with a poppet pressure release head valve Head pressure will slowly decrease pressure will be released through the intake port o...

Page 6: ...ive red plug from compressor s air inlet port 3 Install inlet air filter onto compressor s air inlet port Thread tape Not Recommended 4 Hand tighten inlet air filter IMPORTANT For optimal compressor performance replace filter element periodically Clogged filter will drastically reduce compressor flow rate and performance 400P AUTOMATIC PORTABLE COMPRESSOR USER MANUAL ...

Page 7: ...or cuts out repeatedly 1 Lack of proper ventilation or ambient temperature is too high 2 Compressor valves failed 1 Move compressor to well ventilated area or area with lower ambient temperature 2 Replace compressor Excessive knocking or rattling 1 Worn bearing on eccentric or motor shaft 2 Cylinder or piston ring is worn 1 Service or replace compressor Compressor air flow lower than normal or can...

Page 8: ...tal or lease without the prior express written consent of VIAIR VIAIR does not make any representations warranties or guarantees express or implied as to the accuracy or completeness of the Manual Users must be aware that updates and amendments will be made from time to time to the Manual It is the user s responsibility to determine whether there have been any such updates or amendments Neither VI...

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