Dressta North America’s TD20M Extra crawler dozer is powered by a Tier 3 compliant Cummins QSC engine. The 8.3-L electronically controlled engine delivers 240 net hp (179 kW) at 2200 rpm, an increase of 15 hp (11 kW) over the previous H series model. Maximum torque is now 870 lb·ft (1180 N·m), an increase from 750 lb·ft (1017 N·m). An air grid heater comes standard to aid in cold weather starting.
The TD20M Extra uses a new cooling module with replaceable sections consisting of a charge air cooler, transmission oil cooler, radiator, and hydraulic oil/fan drive oil cooler.
A hydraulically driven, suction-type, variable-speed fan located between the radiator and the grille allows for easy service. It also contributes to reduced abrasion to the cooling module by eliminating sand and other debris from being picked up by the fan blades and blasted against the radiator.
Operating the TD20M is said to be eased via a new left-hand, single-lever joystick control. The joystick replaces two left-hand steering levers and one transmission lever used on the previous model. The transmission allows operators to pre-select travel speed and downshift functions from the joystick.
Dressta NA says it undertook "great efforts" to eliminate or greatly reduce the need for onboard computer control and electronic systems, making the dozer "relatively easy to troubleshoot and repair." Only the engine requires a computer to diagnose problems.
The crawler is available in standard, long-track (LT), and low-ground-pressure (LGP) versions.
Available blade options include a new 11-yd3 (8.5-m3) full-U blade, an increased-capacity semi-U blade measuring 9 yd3 (7 m3), and an angle “C” frame combination of 5 yd3 (4 m3) all for the standard and LT track versions of the machine. The straight blade has an 8-yd3 (6-m3) capacity for use on the LGP track version. An angle blade is also an option.
Winches and rippers are available, with the multishank ripper's penetration depth increased to 28 in (700 mm).
The standard version of the TD20M Extra has an operating mass of 52,140 lb (23,650 kg). The operating mass of the LT version is 53,370 lb (24,210 kg) and the LGP version is 54,410 lb (24,680 kg).
Dressta NA is headquartered in Buffalo Grove, IL, and is a subsidiary of Dressta Co. Ltd., which is headquartered in Stalowa Wola, Poland.