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(Fig. 1) 

400H/450H Hardmount Air

Compressor Installation Parts List:

a.

e.

i.

m.

b.

f.

j.

c.

g.

k.

d.

h.

l.

a. Hose Bracket (1) 
b. Mounting Bolts (4) 
c. Flat Washers (8) 
d. Locking Washer (4) 
e. Nuts (4) 
f.

1/4” F x 3/8” Tube Fitting (1) 

g. 1/4” M x 3/8” Tube Fitting (1) 

h 3/8” Air Line (1)

i.

Air Line Clips (3) 

j.

Screws (3) 

k. Positive (Red) Ring Terminal 
l.

Ground (Black) Ring Terminals (2 Sizes) 

m. Remote  Inlet Air Filter with Filter Element 

(1) 

(Fig. 2)  Compressor Mounting Hardware

b

c

Pre-Installed Rubber Bushing

Mounting Plate

Pre-Installed Rubber Bushing

c

d
e

b. Mounting Bolt 
c. Flat Washer 
d. Locking Washer 
e. Nut 

(Fig. 3) Leader Hose Bracket

Hose Clamp

Clamp Release Tab

Self Anchoring Pin

OPERATING INSTRUCTIONS

IMPORTANT:

1.   Always   operate   the   compressor   at   or   below   the 

MAXIMUM  PRESSURE  RATING  of  the  compressor. 
Refer to Compressor Application and Specifications 
sections of this manual for details.

2.

Always observe the MAXIMUM DUTY CYCLE of the air 
compressor.   Refer   to   Compressor   Applications   and 
Specifications   sections   of   this   manual   for   details. 
Operations exceeding maximum pressure ratings 

and/or duty cycle will result in damage to air 
compressor.

3. 

Your air compressor is equipped with an

 

A U T O M A 

T I C T H E R M A L O V E R L O A D PROTECTOR. 
This   feature   is   designed   to   protect   the   air 
compressor   from   overheating   and   causing 
permanent   damage   to   your   air   compressor.   The 
thermal   overload   protector   will   automatically   cut 
power   to   your   air   compressor   should   the   internal 
operating   temperature   of   the   air   compressor   rise 
above safe levels during excessive use.

4.

Should   at   any   time   during   use,   your   air 
compressor   automatically   shuts   off;   do   not 
attempt to restart the air compressor. Turn power 
switch to the air compressor to the OFF position. 
The   automatic   thermal   overload   protector   will 
automatically reset when internal temperature of 
the air compressor drops below safe levels. Allow 
air compressor to cool off for about 30 minutes, 
before resuming use of the air compressor. 

5.

Keep the vehicle engine running while using the 
air   compressor   to   prevent   discharge   of   your 
vehicle’s battery. 

6.

ONLY   OPERATE   THE   AIR   COMPRESSOR   IN 
WELL-VENTILATED AREAS. 

7.

Compressor   performance   is   also   enhanced   when 
operating compressor with vehicle’s engine running. 

Summary of Contents for 400H

Page 1: ...ompressor Close supervision is necessary when this compressor is being used near children This compressor will become very HOT during and immediately after use Do not touch any part of this compressor with bare hands other than the ON OFF switch during and immediately after use Do not use this product near flames or explosive materials or where aerosol products are being used Do not operate this p...

Page 2: ...D WIRING 1 Disconnect ground cable from vehicle s battery 2 Temporarily position the air compressor in the location where it will be mounted Route the positive wire to the positive post of the battery Measure and cut positive wire to the appropriate length and use appropriate inline fuse 3 Route ground wire to the negative post of the battery or to an appropriate chassis grounding point and cut gr...

Page 3: ...perations exceeding maximum pressure ratings and or duty cycle will result in damage to air compressor 3 Your air compressor is equipped with an A U T O M A T I C T H E R M A L O V E R L O A D PROTECTOR This feature is designed to protect the air compressor from overheating and causing permanent damage to your air compressor The thermal overload protector will automatically cut power to your air c...

Page 4: ...ed on the Inflator Deflator Coil Hose P N 00025 for tire inflation 4 Always inflate tires to manufacturer s recommended tire pressures Exercise extreme caution when driving with aired down tires Re inflate tires before high speed road way travel MAINTENANCE REPAIRS 1 Periodically check all electrical and fitting connections Clean and tighten or repair as needed 2 Periodically check all mounting bo...

Page 5: ...to Reset Thermal Protection Yes Housing Moisture Dust Resistant Dimensions 11 25 x4 0 x7 0 Net Weight 8 lbs Part No 45042 450H Air Compressor Motor Voltage 12 volts Max Current Consumption 23 amps Motor Type Permanent Magnetic Horse Power 4 Jan Max Working Pressure 150 PSI Max Duty Cycle 100 Min On Off 72ºF 100 PSI Continuous Max Restart Pressure 200 PSI Max Ambient Temperature 158 F Min Ambient T...

Page 6: ...or rattling shaft 2 Cylinder or piston ring is worn 2 Repair or replace compressor Compressor air flow 1 Worn piston ring or inlet valve 1 Repair or replace compressor lower than normal or can not pump to higher pressures LIMITED WARRANTY VIAIR Corporation warrants this product when properly installed and under normal conditions of use to be free from defects in workmanship and materials for a per...

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