VIAIR Quarter Duty OBA User Manual
QUARTER DUTY
ONBOARD AIR SYSTEM
PART NO. 10002
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
QUARTER DUTY ONBOARD AIR SYSTEM
Pressure Switch
Compressor
(+) Lead
Thank you for purchasing this complete, self-contained onboard air system. Contained in one package,
you’ll nd everything you’ll need to install a high performance, onboard air source for your vehicle.
Please follow these instructions to install your new system.
OBA Components:
1 - 2.0 Gallon, 5-port VIAIR Air Tank
1 - 275C model VIAIR compressor with leader hose and check valve
(Check to make sure that you have six labeled packages in your kit. Each package contains the parts needed
for specic areas of installation, and may contain smaller bags within each package for specic uses.)
PARTS PACKAGES
Package #1 – Pressure Switch & Relay:
A
30
B
86
87
85
A. Pressure Switch - (90 PSI on, 120 PSI off) (1pc)
B. 40-amp relay (1pc)
Package #2 – Fittings:
C D E
C. 1/4” NPT Drain Cock (1pc)
D. 1/4” NPT 145 PSI Safety Valve (1pc)
E. 1/4” NPT Compression Fitting (1pc)
Package #3 – “Air Out” Air Line:
F
F. Air Out Line
Package #4 – Electrical:
G IH J K
G. Fuse Holder & 20 ft. 12 Gauge Wire (1pc)
H. 20-amp Fuse (1pc)
I. Push-on Female Terminals (4pcs)
J. 16-gauge Butt Connectors (2pcs)
K. 16-gauge Ring Terminal (2pcs)
Package #5 – Compressor Installation:
L
M
N O P Q
SR
T
L. Leader Hose Bracket Clip (1pc)
M. Mounting Bolts (4pcs)
N. Flat Washers (8pcs)
O. Locking Washers (4pcs)
P. Nuts (4pcs)
Q. Air Filter Assembly (1pc)
R. Remote Mount Air Filter Fittings for
Compressor and Air Filter connection (1pc)
S. 2-Pack of Replacement Air Filters (1pc)
T. Air line for Remote Mounting Air Filter (1pc)
Package #6 – Air Tank Mounting:
U V W X Y
U. Mounting Bolts (4pcs)
V. Flat Washers (8pcs)
W. Locking Washers (4pcs)
X. Nuts (4pcs)
Y. Rubber Tank Mount Bushings (6pcs)
USER MANUAL
QUARTER DUTY ONBOARD AIR SYSTEM
P/N 10002
OBA PLUMBING DIAGRAM
2.0 GALLON AIR TANK & PLUMBING
Your 2.0 gallon air tank comes with ve 1/4” NPT port openings to allow installation in many congurations on
your vehicle. To insure safe and trouble-free use of your air tank, we strongly recommend that you install the
supplied drain cock and a safety pressure relief valve. (See Figure 1)
Plumbing Diagram:
(Figure 1)
Safety
Valve
Compression
Fitting
2.0
Gallon
Tank
Tank Fittings:
Install the supplied compression ttings and/or quick connect tting for the air tank in areas where they are
most appropriate for your installation using thread sealant or Teon tape. Make sure that the safety valve is
installed in the top most position on the tank, and that the drain cock is installed in the lowest position on the
tank if the tank is to be installed in any other position than upright on the tank’s mounting legs. Be sure that all
ttings are accessible later in the installation process since you will have to plumb air lines to each tting as
needed to utilize the air tank.
Leader Hose
From Compressor
Pressure
Switch
Drain
Cock
IMPORTANT:
- Tank is rated for 150 PSI maximum working pressure.
- Tank is NOT to be used as a breathing device.
- Bleed pressure from tank before servicing or adding attachments.
- Use only attachments or tools rated for 150 PSI working pressure or less.
CAUTION! DO NOT PRESSURIZE YOUR TANK UNTIL YOU HAVE INSTALLED
ALL NECESSARY PORT FITTINGS AND ACCESSORIES.
- Apply sealant to threads of ttings prior to assembly and tighten each part with a wrench.
- Do not over tighten if your port ttings are made from brass, since brass threads can be stripped.
- Always release air from tank before servicing.
WARNING: FAILURE TO DRAIN TANK AND REMOVE CONDENSATION
WILL CAUSE TANK TO RUST PREMATURELY.
- To remove accumulated condensation inside the tank, bleed pressure from tank until pressure is
approximately 5-20 PSI using drain cock
- If drain cock valve is plugged, release all air pressure from tank, remove drain valve and clean, then reinstall.
IMPORTANT: Please observe air tank’s Date of Manufacture (stamped on tank leg).
Replace air tank 2 to 5 years from date air tank was rst used, or use the date of manufacture as reference.
Adhering to air tank draining guidelines will prolong the life of your air tank.
PLEASE NOTE: RUSTED TANKS CAN FAIL CAUSING EXPLOSIONS OR FATAL INJURIES.
Discard tank immediately if tank is rusted.
SAFETY VALVE: When using a safety pressure relief valve, point the safety pressure relief valve away
from your body when releasing air. Use the pull ring on the safety relief valve to vent pressure from the
tank before servicing.
USER MANUAL
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