VIAIR 400P-Auto - Manual (Page 4)

OPERATING INSTRUCTIONS (cont’d):
This air compressor comes with 1/4” quick connect stud. An extension coil hose and a tire
inflation gun are also included with your compressor. Each end of the extension coil hose is
equipped with a 1/4” quick connect coupler. 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.
2. 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.
3. Turn compressor switch on and hold down the trigger on the tire gun kit to begin inflation.
4. When desired pressure is reached, release the trigger and turn power switch on compressor off.
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 in at 120 PSI, cut out at
145 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-out” pressure (145 PSI)
and restarts when the internal pressure drops below 120 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 button on the tire gun kit to decrease tire pressure.
3. When desired pressure if reached, release the bleeder valve button to halt 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 AUTOMATIC PORTABLE COMPRESSOR
USER MANUAL