Air Pak Diesel Welder Generator

This Kubota diesel welder combines a 210-amp DC stick machine with a built-in 30 CFM rotary-screw air compressor and a battery charge/crank-assist function, aimed at work-truck operators who want to consolidate several pieces of equipment into one compact unit. It is rated 618 pounds, trimmed down versus comparable combination units.

What the compressor and charger add

The rotary-screw compressor runs on demand rather than needing recovery time: output is 20 CFM when idling and climbs to 30 CFM once the engine reaches full speed, across a working pressure band of 80 to 175 PSI, with an automatic shutdown at 200 PSI for safety. Separately, the battery charge/crank-assist circuit can push up to 100 amps of charging current into a 12- or 24-volt battery, or up to 300 amps of crank assist for a weak battery that will not turn over on its own.

Engine and control-panel notes

• A 19 HP Kubota D722 diesel drives a 60-amp alternator with an electronic governor
• Generator output is rated 6,500 watts continuous, with sound at 66 dB idle and 73 dB at high speed
• DC stick output ranges 30 to 210 amps, at a duty cycle of 100 percent at 120 amps and 20 percent at the full 210-amp rating
• Fuel capacity is 7 gallons, with a block heater built into the engine as standard equipment, plus four 120-volt and one 240-volt panel receptacles

Auto-speed control matches engine RPM to whichever of welding, charging, or compressed-air demand is active, rather than idling flat-out regardless of load. It ships new and includes the manufacturer's warranty.

Can the compressor run a 3/4-inch impact wrench? Yes, that size is within its stated air-tool range.

Does the battery charger work on both 12- and 24-volt systems? Yes, per the listed charge/crank-assist specification.

Specifications