Willis APU Advantages

Comfortable Heating even at extreme cold conditions:

The Willis APU heats the coolant with a cast aluminum heat exchanger on the exhaust designed exclusively for this system. From the Heat Exchanger the pre-heated coolant is pumped through the APU engine, directly through the heater cores and then to the truck engine keeping it warm. This allows the heater cores the benefit of using the highest BTU's available in the system. With the truck engine in operation, heated coolant is circulated through the APU engine keeping it warm. The microprocessor control provides for a high RPM mode to provide more BTU's for extreme cold conditions.

Most DC Power:

150A Alternator, higher output than any one else.

Never a cold start:

Keeps the tractor and APU engines coolant and oil at temperatures higher than any one else for easy start even at the most adverse weather condition. Test results have shown crank case temperatures at +70 degrees F. with test cell ambient temperature at -20 degrees F. (Nevada Automotive Test Center)

Most Powerful, Quieter and Smoother APU:

Powered by a three (3) cylinder 20 Horse Power Kubota D-722 engine makes it smoother and more powerful by nature of design versus the two (2) cylinder or single cylinder engines used by the competition. Low and high RPM settings are used depending on power requirements, which also contribute to lower noise levels and fuel consumption.

115V AC Power:

Optional inverter from Tundra fully wired with convenient outlets for safe operation.

Exclusive Options from Willis APU only:

Air-Compressor - The Air-compressor option provides automatic backup to the truck air system. It can work in parallel with the truck compressor to overcome a major leak or independent if the truck compressor fails. Trailers will be kept at the proper level at loading docks and air is available for tire inflation or air tools. When used as designed the APU is pre trip started to warm the engine and build air supply saving the truck engine from cold starts and idle time to build air.

Highest Quality:

A close look and overall evaluation of our product will reveal the in-depth thought, engineering and careful development of this unit. High quality aluminum castings (356T6) are used for frame mounting, drive housings and heat exchanger. Coolant hoses are custom molded, and allow for efficient and unrestricted coolant flow.