OM5027 Specifications - Section 5 Page 5-1 TRUCK COMPONENT DESCRIPTION The KOMATSU Model 830E Truck is an electric drive, off-highway, rear dump truck whose gross vehicle weight is 850,000 lbs. (385 553 kg) (240 - 255 ton nom- inal payload). OPERATOR’S CAB The Operator’s Cab has been engineered for operator comfort and to allow for efficient and safe operation of the truck. The cab contains an integrated ROPS and is fully insulated to reduce noise and vibration. The tinted safety-glass windshield and side windows provide excellent visibility.
The seat is a comfortable, adjustable suspension seat, the steering wheel provides tilt and telescoping adjustments and controls are mounted within easy reach of the operator. The instrument panel provides the operator with instruments and gauges that are necessary to control and monitor the truck’s operat- ing systems and is marked with international symbols for easy identification of functions. ENGINE This Model 830E Truck is powered by a Komatsu SDA16V160 diesel engine rated at 2500 hp (1864 kW) @ 1900 RPM. The radiator, engine, alternator, and blower are mounted on a separate subframe to provide fast, easy removal and installation of the power mod- ule. ALTERNATOR (G.E.
GTA-26) The alternator is mounted in-line with the engine. The alternating current (AC) output of the alternator is recti- fied to direct current (DC) and sent to the wheel mounted DC drive traction motors. DYNAMIC RETARDING Dynamic retarding is used to slow the truck during nor- mal operation or control speed coming down a grade. The dynamic retarding ability of the DC electric system is controlled by the operator by depressing the foot operated retarder pedal and/or setting the RSC (Retarder Speed Control) on the instrument panel. Dynamic Retarding is automatically activated if truck exceeds the overspeed setting.
BLOWER The dual impeller, in-line blower supplies cooling air for the alternator, rectifiers, and both traction motors. The air is exhausted to atmosphere through the wheel motors. WHEEL MOTORS BRAKE SYSTEM Traction motors located within each rear wheel struc- ture receive electrical energy from the alternator. The two traction motors convert electrical energy back to mechanical energy through built-in gear trains within the wheel structure. The direction of the drive motors is controlled by a forward or reverse hand selector switch located on a console in the cab to the right side of the operator. The braking system consists of an all hydraulic actua- tion system.
Depressing the brake pedal actuates wheel-speed single disc front brakes and armature- speed dual disc rear brakes. The brakes can also be activated by operating a switch on the instrument panel. The brakes will be applied automatically if sys- tem pressure decreases below a preset minimum. SUSPENSION POWER STEERING HYDRAIR ® II suspension cylinders located at each wheel provide a smooth and comfortable ride for the operator and dampens shock loads to the chassis dur- ing loading. The Komatsu truck is equipped with a full time power steering system which provides positive steering con- trol with a minimum of effort by the operator.
The sys- tem includes a nitrogen-charged accumulator which automatically provides emergency power if the steering hydraulic pressure is reduced below an established minimum.