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OPERATING INSTRUCTIONS (cont’d):

This air compressor comes with 1/4” quick connect stud. A primary coil hose, an extension 

coil hose and a tire inflation gun are also included with your compressor. Both ends of the 

primary hose are equipped with 1/4” quick connect couplers. The rubber overmold end should 

be connected to the compressor itself. One end of the extension coil hose is equipped with a 

1/4” quick connect coupler, and the other end with a quick connect stud. The extension hose 

is used to elongate overall reach. The tire inflation gun comes with a 1/4” quick connect

stud, pressure gauge, rubber hose, bleeder valve and tire chuck. Attach one end of the 

extension coil hose to the stud on your compressor and the other end to the stud on the tire 

gun kit. The tire gun kit can be used for both airing up and airing down. Please familiarize 

yourself with the following functions of this versatile air tool:

TIRE INFLATION:

1.  Attach one end of the extension coil hose to the compressor and the other end to the tire gun kit,

45-degree angled chuck or 90-degree twist-on chuck – depending on need.

2.  Turn compressor switch on and hold down the trigger on the tire gun kit to begin inflation.

3. When desired pressure is reached, release the trigger. If finished with use, turn power switch on

compressor off position.

NOTE:

 To release excess pressure, turn off compressor and disconnect hose from compressor. 

 

With the tire inflation gun still connected to the other end of the coil hose, pull trigger on the tire 

inflation gun to release excess pressure.

CAUTION:

 To avoid over inflation, never exceed recommended pressure on articles to be inflated. 

Bursting can cause serious injury.

NOTE:

 Your air compressor is equipped with a pressure switch (cut on at 130 PSI, cut off at 

155 PSI). This feature is designed to protect the air compressor from over-pressure causing 

permanent damage to your air compressor. The pressure switch 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. With the inflation option of your choice still connected to the tire inflation gun, press the

bleeder valve button on the tire gun kit to decrease tire pressure.

2. When desired pressure is reached, release the bleeder valve button to stop tire deflation.

IMPORTANT:

 Make sure compressor sits upright while operating compressor. Do not operate 

compressor in any other position. Avoid tugging at compressor to move it. Instead, move 

compressor to the same side of vehicle as tires that are being aired up.  

Always make sure the Portable Compressor’s power cord is uncoiled and fully extended 

when using your air compressor to avoid overheating the power cord.

INLINE PRESSURE GAUGE:

1.  The pressure gauge on the inflation gun provides convenient tire pressure monitoring when airing

up or down (not airflow of the compressor).  This eliminates switching back and forth between a

tire chuck and a tire pressure gauge.

2.  Please note that during inflation and deflation, due to air velocity, pressure gauge cannot provide

accurate pressure readings.  Release lever on the tire inflation gun during inflation to check

tire air pressure.

NOTE:

 To release excess pressure, turn off compressor and disconnect hose from compressor. 

 

With the tire inflation gun still connected to the other end of the coil hose, pull trigger on the tire 

inflation gun to release excess pressure.

400P-RVS AUTOMATIC PORTABLE COMPRESSOR

USER MANUAL

Summary of Contents for 40044

Page 1: ...OMPRESSOR HEAVYWEIGHT SERIES PART NO 40044 IMPORTANT It is essential that you and any other operator of this product read and understand the contents of this manual before installing and using this product SAVE THIS MANUAL FOR FUTURE REFERENCE USER MANUAL ...

Page 2: ...r 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 an...

Page 3: ...of 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 tir...

Page 4: ... injury NOTE Your air compressor is equipped with a pressure switch cut on at 130 PSI cut off at 155 PSI This feature is designed to protect the air compressor from over pressure causing permanent damage to your air compressor The pressure switch 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 ...

Page 5: ... 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 CAUTION Never touch the air compressor or fittings connected...

Page 6: ...e 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 RVS AUTOMATIC PORTABLE COMPRESSOR USER MANUAL ...

Page 7: ... 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 canno...

Page 8: ...ithout 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 VIAIR nor any of...

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