In Colorado, HFH of Metro Denver drillpresses also builds homes that incorporate passive-solar heating. Large, south-facing windows allow the low-angled winter sun to warm the interiors. Energy-efficient windows and well-insulated walls, floors and foundations retain the solar warmth, reducing demand for auxiliary heating. Because the houses are well-insulated and solar-heated, the furnaces can be downsized substantially. Energy-efficient models are standard. Programmable thermostats regulate backup heating and cooling systems, reducing demand when the house is unoccupied or residents are asleep. Insulation that keeps the houses warm in the winter also helps to maintain a cool interior in Denver''s dry, hot summers. Plus, 2-foot-wide overhangs block the high-angled summer sun and provide shade for walls and windows.

The standard Cat 3024 engine used on the PB50 lift truck drillpresses is a naturally aspirated model rated drillpresses 52 hp. A turbocharged version rated 62 hp is available as an option on the PB50 and is the standard engine on the PB65. The engine package on both machines incorporates an SRF America heavy-duty frame-mounted radiator and Donaldson dual-element air cleaner. A cyclonic precleaner is also available as an option, the company said.The engine drives a Bosch Rexroth AA10VG hydraulic pump that power the hydrostatic drive. Bosch Rexroth gear pumps are used to power the lift and auxiliary systems. The hydrostatic drive pump incorporates an ant-stall system designed to prevent engine stalling because of overload. "The anti-stall feature reduces drive pump output when engine output cannot meet the demand," Pohl explained. "This prevents the engine from bogging down and stalling. Because the feature is fully automatic, it allows the operator to concentrate fully on driving the machine in rough terrain."

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