VIAIR 400P - Manual (Page 3)

400P PORTABLE COMPRESSOR
OPERATING INSTRUCTIONS (cont’d):
IMPORTANT: Engine must be running while using this compressor.
Before attaching air compressor’s power cord to power source, check to make sure that the
ON/OFF switch of your compressor is in the OFF position. Attach the Positive battery clamp (Red)
to the Positive terminal of the battery and the Negative battery clamp (Black) to the Negative terminal
of the battery.
CAUTION: Your Portable Air Compressor is Moisture and Dust Resistant, but NOT WATER OR DUST
PROOF. Never place compressor in soft sand while running the compressor. Vibration from the
compressor will cause the compressor to settle into soft sand, resulting in compressor drawing in
foreign particles. Never expose compressor to water while running the compressor.
This air compressor comes with ¼” quick connect stud. Your Inline Deflator comes with
extension coil hose with ¼” quick coupler. Simply attach this multifunction extension coil hose
to the ¼” quick connect stud and you are ready to inflate tires. The Inline Inflator/Deflator
Hose can be used for both Airing Up and Airing Down. Please familiarize yourself with the
following different functions of this versatile air tool:
TIRE INFLATION:
1. Attach quick connect coupler to air compressor.
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. Check to make sure the Deflator Collar Lock is disengaged.
4. Turn compressor switch on to begin inflation.
When desired pressure is reached, turn compressor off.
CAUTION: To avoid over inflation, never exceed recommended pressure on articles to be inflated.
Bursting can cause serious injury.
HANDS-FREE CONTINUOUS 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. Push Deflator Collar toward tire valve stem and turn Deflator Collar clockwise to engage lock.
3. When desired pressure if reached, turn Deflator Collar counterclockwise to disengage lock.
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 8ft. power cord is uncoiled and fully extended
when using your air compressor to avoid overheating the power cord.
INTERMITTENT DEFLATION:
1. The intermittent deflation function offers fast downward pressure adjustments.
2. With tire chuck attached to tire valve stem, push Deflator Collar toward tire valve stem
to decrease tire pressure.
3. Release Deflator Collar to halt deflation.
INLINE PRESSURE GAUGE:
1. The 2-inch Inline Pressure Gauge provides convenient tire pressure monitoring when airing up or
down. 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. Momentarily halt inflation or deflation to obtain accurate
pressure readings.
USER MANUAL