Product Guide - Powertrain
Gear drives
Auburn Gear's Power Wheel gear drives have three torque ranges. The Model 40 has a 4500 N•m (3320 lb•ft) intermittent output torque rating. The Models 60 and 75 have a corresponding 6800 N•m (5015 lb•ft) and 8500 N•m (6270 lb•ft) intermittent output torque rating, respectively. The drives feature high-efficiency gearing, which makes them suitable for alternative use in dc-motor applications. The series of drives also provide deep reduction capabilities and the TwisToTow feature for disconnect without a tool.
MTU/DDC mining engine
A new mining engine from MTU Friedrichshafen and Detroit Diesel Co. (DDC)—a 20-cylinder version of the 4000 series with 2700 kW (3620 hp) for trucks and 2200 kW (2950 hp) for excavators—is undergoing tests and is scheduled to go into series production in October 2002. The 20V 4000 has a dry mass of 9.5 t (10.5 ton) and features a common rail system that enables the parameters affecting combustion to be independently adjusted, including the time and duration of injection as well as the amount and the characteristic curve of the injection pressure. The injection parameters are adapted to the varying environmental conditions of the engine by the electronic regulation provided by the common rail system, allowing the engine to work at altitudes up to 3700 m (12,100 ft) over sea level without performance reduction. Its bore and stroke are 165 mm (6.5 in) and 210 mm (8.3 in), respectively.
Air precleaner
According to Best-Ex, Inc., studies show that it takes only an average of 225 g (8 oz) of dirt to ruin an engine. Problems caused by dirt getting past the filtration system include premature wear of bearings, ring, and cylinder surfaces. The company's EX-80 Centri air precleaner has a 200-mm (8-in) I.D. inlet and will service equipment with requirements of 26,900 to 45,300 L/min (950 to 1600 ft3/min). The device, made of non-rusting aluminum, is self-cleaning and maintenance free. It extends air-filter life as much as 12 times.
Cat's new C-Model engines
Caterpillar's 8.8-L C-9 industrial engine is an inline, six-cylinder turbocharged engine using Cat's exclusive ADEM III Electronic Control System, air-to-air aftercooling, and HEUI-B (hydraulically actuated, electronically controlled unit injector) fuel system. Its initial ratings are 186 to 250 kW (250 to 335 hp) at 1800 to 2200 rpm with a maximum torque capability of 1492 N•m (1100 lb•ft) at 1400 rpm. With a dry mass of 680 kg (1500 lb), the C-9 is almost 30% lighter than the Cat 3306. Specific fuel consumption at full load and 2100 rpm is 10% less than a Cat 3306 running at the same speed and output. The C-9 is built around a cast-iron block, incorporating replaceable wet, hardened, plateau-honed surface cylinder liners for longer life, lower maintenance costs, and rebuilding ease. An integral cooler helps reduce weight and engine width. Cat's C-Model industrial engines meet the current and upcoming EU Stage II and the U.S. EPA and CARB Tier 2 regulations.
Shovel loader axle
Developed specifically for shovel loader applications, Newage Transmissions' 500SL is a double reduction rigid drive axle with optional hydrostatic input for machines in the 26-48 kW (35-65 hp) range. The hydrostatic unit's ratio of 2.00:1 complements six standard mechanical ratios from 8:47: to 19.3:1 to ensure the new model's suitability for a wide range of applications. It is fitted with integral oil-immersed disc brakes and is offered in a variety of road wheel-mounting configurations. A range of cardan shaft coupling options and adapters for all major hydrostatic motors are available.
