Self contained air compressor and hydraulic pump

Miller introduces EnPak Mechanic Series truck-integrated, self-contained air compressor, hydraulic pump and generator.


Appleton, Wis.—Miller Electric Mfg. Co. introduces the EnPak Mechanic Series truck-integrated, self-contained air compressor, hydraulic pump and generator. EnPak’s 27-HP Kubota diesel engine eliminates the need for a PTO and integrates seamlessly into its electrical and fuel systems, allowing mechanics to run all their tools with the truck turned off. This lowers fuel costs up to 30 percent, reduces truck engine hours up to 60 percent, lowers truck noise by as much as 10 dB and substantially reduces exhaust fumes in the work area.

EnPak’s variable speed rotary screw air compressor, Miller’s Air Pak 40, offers a rated 40 CFM at 100 PSI with a 175 PSI maximum that allows mechanics to use air tools without having to stop working to wait for pressure to build. Its Eaton variable displacement piston hydraulic pump powers a rated 3000 PSI at 8.5 GPM (up to 20 GPM maximum) and offers smooth, fast and accurate crane operation. And 6,000 watts of generator power at 100 percent duty cycle plus an additional 2,400 watts of pure sine wave EnVerter power at idle is available to run electrical tools including welders, lights and laptops used for equipment diagnostics.

EnPak features the exclusive EnPower technology: real time load monitoring that automatically matches engine speed to the load requirement put on the machine. This offers additional fuel savings as RPMs only ramp up to levels needed to perform the task and then fall back down to idle when finished.

Mechanics can also run tools simultaneously—such as using the crane and air compressor at the same time—without noticing any drop in performance. One mechanic can weld on one side of the truck while another grinds or uses an impact wrench on the other side without any lag in power.

EnPak offers up to 6,000 watts of single-phase generator power to run welders, grinders, lights and other large tools through its 120/240-volt receptacles at the back of the truck. For welding, it can run a Maxstar 150 Stick/TIG welder (up to 1/8-in. stick rod), Maxstar 200 Stick/TIG welder (up to 3/16-in. Stick rod or carbon electrodes) or a Millermatic Passport Plus for welding with MIG/flux cored wires from .024- to .035-in. And, EnPak’s EnVerter power offers 2,400 watts of pure sine wave 120-volt power at all engine speeds regardless of the overall load placed on EnPak to run everything from laptops to lights and microwaves.

EnPak’s 27 HP Kubota diesel engine shares the truck’s fuel supply; this means mechanics only have one tank to fill. It also uses the truck’s 12-volt battery, eliminating the need for a second battery. EnPak even provides 12 volts of power and a 60-amp charge to the battery to ensure peak battery performance and extended battery life.

Its integrated control design allows the mechanic to use the crane remote they are already familiar with—there is no need to retrain the operator. EnPak’s remote panel is mounted at the rear of the truck and monitors, operates and provides diagnostics for engine and air compressor functions such as fuel use and engine RPM. The mechanic can control all machine functions from one central location at the back of the truck.

EnPak also maximizes truck bed space by housing the generator, air compressor and hydraulic pump in one self contained unit instead of having multiple machines for each capability. It can be mounted as a sidepack or in the load space and is only an inch taller and wider than Miller’s Bobcat series of engine-driven welding generators. It doesn’t require a cut-out in one of the truck’s storage compartments for front panel access, as EnPak can be operated completely by remote. And all service components are easily accessible through hatches at the front and top of the machine.

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