VMAC Multifunction - Air Compressor-Generator-Welder Power System

Multifunction – Compressor-Generator-Welder Power System


Extreme performance in a single compact system. This system includes all the power you need on the jobsite to complete your work.

This self-contained system is ideal for mechanic’s trucks with electric or electric over hydraulic cranes.  The Compressor-Generator-Welder system can operate electrical equipment, air tools and welding accessories.

Components included:

  • 45 CFM Rotary Screw Air Compressor
  • 8 kW Continuous AC Generator
  • 250 A DC Welder (adjustable)
  • 12-48 V Battery Booster (adjustable)
  • 12-48 V Battery Charger (adjustable)
  • Factory-installed Cold Climate Kit – 120 V, tested to -40°F (-40°C)

Applications – Common jobs that use the Compressor-Generator-Welder Power System:

  • Mobile heavy duty mechanics
  • Welding trucks
  • Heavy equipment repair technicians
  • Remote access jobs in mining, logging and oil & gas


High airflow, 100% duty cycle with the reliability of the global leader in mobile compressed air.

Multi-process welding including gouging, constant current, constant voltage and the ability to run a suit-case style wire feeder.

Keep your customers up and running with a mobile battery charger.

Boost anything from a car to a haul truck.

Proven mobile power solution to run your electronic equipment and electric tools.

Cold Climate Protection recommended if ambient temperatures frequently drop below -10C (14F). Combine with optional 1000W inverter and warm the system on the way to the job site.


Air Compressor Output 45 CFM @ 100 psi (175 psi max)
Air Compressor Type Belt-driven, 100% duty cycle, VMAC oil-injected rotary screw
Engine: Kubota Diesel D902 3-cylinder, naturally aspirated 3,600 RPM, Tier 4 Final
Throttle Control: 2-speed throttle, responds to air demand
AC/DC Generator/Welder:
  • AC:
    • 8 kW continuous output
    • 1 x 30A, 240V, 60Hz 3 phase circuit (w/wo receptacles)
    • 2 x 20A, 120V, 60Hz single phase circuit (w/wo receptacles)
  • DC: For battery boosting/charging; other DC loads
    • Boost – 300A max @ 13V; Charge – 12V,24V,36V,48V
    • CC mode for SMAW and GTAW (stick/TIG welding)
    • 250A @ 35% duty cycle; 190A @ 60% duty cycle
Battery: AC Delco 12 V, 460 CCA, 575 CA
Control System:
  • Customizable digital controls
  • Remote mounted generator/welder and compressor control panels
  • Any one function or all three can be selected at any time
  • Engine auto-restarts with air demand
  • Separate selector switches engage compressor and generator
  • With compressor only selected, and sustained periods of no air use, the control system will shut down the engine
  • With any other function selected, the engine will not shut down automatically
  • Programmable auto restart for cold temperature or low battery voltage
Cold Climate Protection:
  • Adjustable glow plug control.
  • Engine and compressor will wait till the temperatures are above 41°F (5°C) before loading and going into a running state.
  • Engine will automatically restart when system temperature falls below 23°F (-5°C); small heat strip included in LCD Digital Control Box.
  • Battery jump start connections are recommended to be tied into the truck batteries in locations where extreme cold is expected. It is not necessary in mild climates.
Weight (wet): Approximately 560 lbs (254 kg)
  • 33” (l) x 23” (w) x 29” (h); 83.8 cm (l) x 58.4 cm (w) x 73.7 cm (h)
  • Mounting Plate: 20” (l) x 20” (w); 50.8 cm (l) x 50.8 cm (w)
Decibels (dB) @ 21 feet (6.4 meters): 81.2 dB at high idle, 76 dB at low idle, 0 dB in Standby Mode
Fuel Supply Options:
  • 7-Gallon tank with fuel gauge and low fuel shut-off sensor
  • External Diesel Fuel Pump Kit
Air Receiver Tank (recommended, not included): Minimum 10-Gallon Air Receiver Tank - Recommended for proper operation of all functions.
  • Two years on all major components; VMAC air ends are covered by VMAC’s Lifetime Warranty; the Kubota engine is covered by Kubota’s 2-Year warranty.
  • For more information about VMAC’s or Kubota’s warranty policies, visit www.vmacair.com/warranty.