UNDERHOOD^® 40 Air Compressors – Truck Series

The UNDERHOOD^® 40 rotary screw air compressor system is the perfect solution for service trucks and operators who use small air tools for light duty applications.

VMAC engineers truck mounting kits for the easiest possible installation. Working closely with leading truck manufacturers, VMAC ensures that mounting kits do not affect OEM warranties.

Mounting kits available for:

Ford F-250 to F-600 Power Stroke Diesel
Ford F-250 to F-600 Gas
RAM 2500 to 5500 Cummins Turbo Diesel

Some applications are restricted to specific series and/or models. Please confirm compatible vehicles on VMAC’s Application List.

Free Up To 23 Cubic Feet On Your Truck Deck

UNDERHOOD40 air compressors free up to 23 cubic feet on the truck deck or cargo area because the air compressor mounts in the engine compartment. The only space required on the truck deck or cargo area is 1.7 cubic feet for a combined air/oil cooler and air/oil separator tank.

Decrease Truck GVW By Up To 290 lb

UNDERHOOD40 air compressors reduce truck GVW by as much as 290 lb. Choosing a lightweight air compressor means you’ll be able to add more tools and equipment to your truck, carry more materials, or take advantage of better fuel economy.

Up To 40 CFM*, 100% Of The Time

UNDERHOOD40 air compressors use patented rotary screw technology designed to run at 100% duty cycle without stopping, so operators don’t have to wait for their air compressor to fill up a large air receiver tank.

Advanced Digital Controls & Telematics*

The UNDERHOOD40 with VMAC’s advanced digital controls is complete with telematics, built-in soft start, safety controls, and enhanced diagnostics. VMAC’s advanced digital controls integrate with the vehicle and provide more information about your compressor than ever before, making it easy to monitor the performance of your system and plan maintenance intervals.

* Available for most popular 2023+ model year commercial work trucks; see application list for details.

UNDERHOOD40 Air Compressor Specifications

The specifications below are for UNDERHOOD40 systems with Advanced Digital Controls. Alternatively, you can view legacy UNDERHOOD40 specifications here.

Air Compressor Output

Up to 40 CFM* @ 100 psi (150 psi max)

Air Compressor Type

Belt-driven, 100% duty cycle, VMAC oil-injected rotary screw

Total System Weight (wet)

Approximately 62 lb (28 kg)

WHASP Tank

Combined air/oil cooler, air/oil separator tank
19.75” (l) x 8.0” (w) x 17.5” (h); 44.5 cm (l) x 20.3 cm (w) x 50.2 cm (h)

Digital Throttle Control

Two-speed operation
Automatically modulates engine RPM depending on air usage

Display Box

On/Off function of compressor
OLED displays real-time system information, service notifications & informative diagnostics messages
Interface for adjusting all compressor and throttle control settings

Control Module (Controller)

Continually monitors sensor health and safety interlocks
Optional telematics provide real-time diagnostics, system use, hours, service intervals, remote start/stop, and error codes through industry standard J1939 interface

Safety System

Automatic system checks prior to engaging compressor
Compressor temperature, pressure & blowdown sensors
Compressor thermal protection circuit
Open/short circuit real-time diagnostics on sensors
Automatic rapid blow-down valve & 200 psi air pressure relief valve on WHASP tank

Air Receiver Tank (required, not included)

Minimum 6-gallon air receiver tank required for best performance

Warranty

Two years on all major components; VMAC air-ends are covered by VMAC’s Lifetime Warranty (Limited); for details, visit www.vmacair.com/warranty

*Actual maximum CFM output of the air compressor varies by vehicle application. See Application List for details.

Advanced Digital Controls & Telematics available for most popular 2023+ model year commercial work trucks.