OM5013 Specifications - Section 5 Page 5-1 SPECIFICATIONS ENGINE OPERATOR’S CAB The Komatsu 630E Haulpak truck is powered by a Detroit Diesel 16V-149TIB engine rated at 1800 HP (1342 kW) or a Cummins KTTA 50-C engine rated at 1800HP (1342 kW). Other engines may be specified as optional equipment. The Operator’s Cab has been engineered for operator comfort and to allow for efficient and safe operation of the truck. The cab is rubber mounted to reduce noise and vibration.
It includes a tinted safety-glass wind- shield and sliding side windows for excellent visibility, a deluxe interior, controls mounted within easy reach of the operator, and an instrument panel which pro- vides the operator with all instruments and gauges which are necessary to control and monitor the truck’s operating systems. ALTERNATOR The diesel engine drives an alternator mounted in-line with the engine. The alternating current (AC) output of the alternator is rectified to direct current (DC) and sent to the DC drive wheel motors. POWER STEERING The truck is equipped with a full time power steering system which provides positive steering control with a minimum of effort by the operator.
The system includes nitrogen-charged accumulators which automatically provide emergency power if the steering hydraulic pressure is reduced below an established minimum. WHEEL MOTORS (GE 776) The output of the alternator supplies electrical energy to the two wheel motors attached to the rear axle housing. The two wheel motors convert electrical en- ergy back to mechanical energy through built-in gear trains within the wheel motor assembly. The direction of the wheel motors is controlled by a forward or reverse hand selector switch located on a console to the right side of the operator. BRAKE SYSTEM 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 as described later in this manual. The brakes will be applied automatically if system pressure decreases below a preset minimum. BLOWER The blower supplies cooling air for the alternator, rec- tifiers, and both wheel motors. The air is then ex- hausted to the atmosphere through the wheel motors. SUSPENSION DYNAMIC RETARDING HYDRAIR ® II suspension cylinders located at each wheel provide a smooth and comfortable ride for the operator and dampens shock loads to the chassis during loading and operation.
The dynamic retarding is used to slow the truck during normal operation or control speed coming down a grade. The dynamic retarding ability of the DC electric system is controlled by the operator through the acti- vation of the retarder pedal in the operators cab and by setting the RSC (Retarder Speed Control). Dynamic Retarding is automatically activated if truck goes to a preset overspeed setting.