Surface mining equipment is designed for durability and large payloads, and the new Komatsu HD605-7 is no exception. Developed with efficiency in mind, the truck offers mechanical and electronic improvements over the previous version.
Everything on the 9355-mm (368-in) vehicle is oversized. A box frame supports the 101,190-lb (45,900- kg) machine, which rides on 24.00-R35 tires.
A 23.2-L inline six-cylinder SAA6D170E-3 diesel engine produces 715 hp (533 kW) and 2400 lb·ft (3254 N·m).
A fully automatic seven-speed gearbox propels the vehicle around the mining site at a maximum speed of 43.5 mph (70 kmh) and, according to Komatsu, delivers fast acceleration.
Stopping a vehicle that can weigh up to 242,290 lb (109,900 kg) when fully laden is done with the help of a 10,256 in2 (66,168 cm2) braking area squeezed by fully hydraulic disc brakes.
Improved fuel economy, a concern with a 206-gal (780-L) tank to refill, is attempted with a redesigned engine and transmission controller. The retard speed control system maintains a constant speed on downgrades to keep 120 ton (109 t) under control. The cab offers an electric window, am/fm radio, A/C and exhaust heating, tilt wheel, and low effort pedals and levers for easy use. Crash protection, more often a concern for other traffic, is nevertheless thought of in the form of seat belts and rollover protection.
Maintenance is minimized with extended 500-h engine oil changes and 4000-h hydraulic oil changes, but it remains costly because the crankcase holds 15 gal (57 L) and the hydraulic system holds 32 gal (122 L). All filters and lubrication points are centralized for easier servicing.
The dump bed has a 69.4-ton (63-t) capacity, placing the 605-7 at the smaller end of Komatsu’s rigid truck lineup.
The Komatsu vehicle health monitoring system is standard and sends vehicle information to a Komatsu center for easy access. The remote evaluation system can track usage history and faults and suggest a course of action.
The optional payload meter records the amounts the truck carries on a daily basis for fleet optimization.