PC120-6 Komatsu excavator specs & Dimensions (1993 - 2000)

Working Mode Selection

The Avance excavator is equipped with five working modes. Each mode is designed to match engine speed, pump speed and system pressure with the application at hand. H/Q Mode is designed for heavy-duty digging operations. This mode provides the power to dig through tough conditions while maintaining fast cycle times. G/O Mode is for general digging operations and combines fast cycle times with excellent fuel economy. F/O Mode is for finishing operations where smooth movement is most desired. L/O Mode is designed for heavy lifting operations. With this mode, pressures are increased and speed is reduced to provide the operator with smooth, powerful lifting. B/O Mode is new for the Avance excavator and is used for breakers. This mode allows engine and pressure to be preset to the specifications of the breaker manufacturer.

Lever Switch

This feature is used in conjunction with the joystick switch to select either the 'Power Up' or 'Speed Down' functions in the H/O or G/O modes. Power Up mode will increase implement force by 9% for 8.5 seconds when the joystick button is pressed. This gives the excavator a burst of power to break through tough digging conditions while maintaining excellent cycle times and fuel economy. Speed Down mode will decrease engine speed by one level while increasing implement force by 9% for as long as the joystick button is pressed. This allows the operator to perform delicate operations easily while maintaining full power. If this mode is selected for long periods of time, the L/O mode can be selected, and the power with increased power will be available at all times.

Automatic Deceleration

This feature reduces engine speed when the controls are in neutral for over four seconds, enabling the operator to conserve fuel and quiet operations while waiting for trucks. This feature, however, can be turned off should the operator require full engine power at all times.

Noise Reduction

The noise levels at the operator's ears have been decreased to as low as 70dBA by improving the door and seals for the cab and engine compartment. In addition, a mixed-flow fan has been added to reduce fan speed and channel air around the engine, thereby reducing wind noise which had been created by the fan.

HydrauMind

Avance is the next generation of excavator development from Komatsu. This machine provides the most productive and economical excavator on the market today. HydrauMind is a closed center hydraulic system designed with four Komatsu exclusive valves, which furnishes the Avance operator with greater control and greater responsiveness. Operations are smoother because the LS Bypass Valve reduces hydraulic surge pressures. Cycle times and fuel efficiency have been increased with the use of the Pump Merge Divide Valve. The LS Select Valve is used to match the pump merge divide valve operations to reduce travel shock and maintain greater swing speeds. Finally, the LS EPC Valve has been added to match swing speed proportional to engine rpm, thereby increasing the overall efficiency of the hydraulic system. With this hydraulic system an Avance operator experiences less fatigue and greater control, because the work equipment responds directly to the controllers.

Add On Service Valves

As your needs expand so can your Avance excavator. With the HydrauMind system up to three service valves can be quickly and easily added to the main valve body. This allows the Avance excavator to adapt to all your future demands.

Hinged Oil Cooler

With the addition of a hinged oil cooler, cleaning the oil cooler and radiator is simpler and less time consuming. In addition, cleaning is more thorough and the radiator maintains its efficiency.

Travel Speeds

The Avance excavator is equipped with three automatic travel speeds to provide smooth, efficient travel around the job site.

Cab

The Avance cab design has increased the cab volume to provide a more spacious and comfortable working environment. Visibility has been enhanced with additional window area and by attaching the windshield wiper to the cab, away from the operator's line of view. The remote wiper also enables the windshield to be raised and lowered easily, because no wires need to be connected or disconnected and the weight of the windshield is reduced. Side visibility has been improved by adding glass to the lower half of the door. Upward visibility is increased by installing a larger, forward mounted ceiling hatch which eliminates the upper cross bar. Ventilation has been improved with the larger, fresh air intake air system and by providing additional vents through the cab. Finally, two storage compartments are installed behind the operator's seat for personal items and for hot/cold items.

Seat

The operator will experience less fatigue during long days with the redesigned, tiltable, semi-bucket seat. This seat utilizes a highly elastic, non-deforming urethane foam which will hold its shape, while the cloth cover provides excellent ventilation for unsurpassed comfort. The dual tilt mechanism allows the operator to conform the seat to their specific posture and size for reduced fatigue and greater visibility.

Controls

The multiple position, pressure proportional control levers allow the operator to work in comfort while maintaining complete accuracy. A double slide mechanism allows the seat and controllers to move together or the seat can move independently. This allows the operator to position the controllers for maximum comfort. The multi-position monitor is easily reached and can be rotated to remove all glare. The incline dashboard makes the switches and fuel control dial easier to view and use.