Komatsu’s WA600-6 Built for Mining, Quarry Applications

Wed April 09, 2008 - National Edition
Construction Equipment Guide

The 118,385-lb. (53,698 kg) WA600-6 is designed primarily for quarry, sand and gravel, industrial and smaller mining applications. It offers improved productivity, lower fuel consumption and increased reliability over the WA600-3, according to the manufacturer.

The WA600-6 is powered by a Komatsu SAA6D170E-5 six-cylinder engine, producing 502 net hp (374 kW) at 1,800 rpm, a significant increase in horsepower over the previous model. The engine is EPA Tier III emissions certified and is equipped with new technologies including an electronic control system to optimize vehicle performance, a heavy-duty high pressure common rail fuel injection system, a new combustion system for reduced noise and fuel consumption, a cooled exhaust gas recirculation system and an air-to-air charge air-cooling system.

The WA600-6’s engine comes standard with dual-mode engine power: The Economy mode for fuel efficiency, and a Power mode for maximum productivity.

The WA600-6 boasts a breakout force of 87,230 lbs. (30,486 kg), a straight static tipping load of 80,645 lbs. (36,580 kg) and a 40-degree turn tipping load of 67,210 lb. (30,486 kg).

For maximum bucket control during both single and simultaneous bucket movements and improved fuel consumption, the machine is equipped with variable displacement piston pumps and CLSS (Closed Load Sensing System). Its standard 8.4-cu.-yd. (6.4 cu m) bucket is suited to loading 50- to 65-ton (45 to 59 t) haul trucks such as Komatsu’s HD465-7 and HD605-7.

Power, Productivity

During load and carry applications, a new, large capacity lock-up torque converter provides increased productivity, faster cycle times and improved fuel consumption. With a 3-element, single stage, double-phase torque converter and a full-powershift, planetary type transmission, travel speeds have increased over the previous model, with a forward top-speed of 23.4 mph (37.6 kmh) and a reverse top-speed of 23 mph (37 kmh).

The WA600-6’s modulated clutch system controls the tractive effort from 100 percent to 20 percent of the T/C converter output. It offers adjustable travel speed and traction control settings for multiple applications.

The WA600-6’s hydraulic cycle times with a rated load in the bucket enable faster cycle times. It takes only 9.3 seconds to raise a loaded bucket; 2.3 seconds to dump it; and 4.1 seconds to lower an empty bucket. A hydraulically driven, reversible cooling fan uses only the required power to provide the necessary cooling needed for a particular application.

Komatsu’s EMMS

The WA600-6 includes Komatsu’s EMMS (Equipment Management Monitoring System), which displays 28 different machine functions including fluid/filter change intervals and trouble-shooting memory display functions such as engine oil levels and coolant temperature. Also on board is Komatsu’s VHMS (Vehicle Health Monitoring System) to provide detailed monitoring of the machine via satellite communication or through laptop computer downloads.

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