WA250-6

TECHNICAL DATA

EQUIPMENTS

HIGHLIGHT

HIGH PRODUCTIVITY & LOW FUEL CONSUMPTION

Faster Travel & Lower Fuel Consumption

High performance SAA6D107E-1 engine

Electronic heavy duty common rail fuel injection system provides optimum combustion of fuel. This system also provides fast throttle response to match the machine’s powerful tractive effort and fast hydraulic response. Net: 103 kW 138 HP

Low emission engine

This engine is U.S. EPA Tier 3 and EU Stage 3A emissions certified, without sacrificing power or machine productivity.

Low fuel consumption

The high-torque engine and HST with maximum efficiency in the low-speed range provide low fuel consumption.

ECO indicator

The ECO indicator will inform the operator when the machine is maximizing fuel efficiency.

Highly Efficient HST

Electronically-controlled HST with a variable pump and 2-motor system

Komatsu HST system allow a highly efficient and powerful operation. Increasing pump capacity and variable input torque control of new electronically controlled HST pump enable the engine to run at the best speed range and reduce fuel consumption.

The efficiency of HST motors

HST provides quick travel response and aggressive drive into the pile. The variable displacement system automatically adjusts to the tractive effort demand to provide maximum power and efficiency. When high drive torque is needed, both motors are engaged to provide highest torque. Maximum rim pull can provided from zero travel speed. This combination makes the loader very aggressive and quick at digging, climbing or initiating movement. When high travel speed is needed, clutch cuts off the low speed motor to eliminate drag and achieve excellent fuel efficiency.

Electronically-controlled HST with Variable Shift Control System

Full auto-shifting

Full auto shifting eliminates any gear shifting and kick-down operation to allow the operator to concentrate on digging and loading.

Variable shift control system

The variable shift control system allows setting the top speed for increased safety and precision. The operator can choose between first, second, third or fourth maximum speeds by dialing the speed range selector switch. For v-cycles, the operator can set the speed control switch to 1 or 2, which provides aggressive digging, quick response and fast hydraulics. For load and carry, select 3 or 4 which still provides aggressive digging but with much faster travel speed.

Variable and fine travel speed control

When the variable shift control switch is in 1st speed, ground speed can be adjusted between 4 km/h and 13 km/h with the fine control. This allows constant low driving speeds that are perfectly adjusted to applications such as lawn mowing or milling jobs.

Useful Functions Given by HST

Self braking effect of the HST drive lines

The self braking effect of the HST drive line slows down the machine when the accelerator pedal is released. It can hold the loader in position on workable slopes, and it will be an advantage in stockpiling or ramp loading. Also it prevents uncontrolled rolling. Safety is greatly improved especially when working in confined spaces or inside industrial buildings. In addition, brake wear is practically eliminated.

Improved inching performance

Electronically controlled HST brake provides improved inching performance of the machine and demonstrates ideal braking control when the machine is travelling and working. Accelerator pedal sensitive intelligent HST control Finely-tuned HST control according to the accelerator pedal angle achieves variable clutch timing by machine speed and motor shift control in quick acceleration. It reduces shocks and allows smoother traveling and better energy-saving operation.

Overrun prevention system

Overrun prevention system will secure safety in downhill and protect the power train and brake components from overload. When the travel speed reaches 40 km/h, the caution lamp informs the operator to reduce the speed. When the machine descends a moderate slope (6 degrees or less), maximum travel speed is automatically limited to 42 km/h. Notes: When the machine descends a steep slope, it is necessary to use the service brake to reduce the speed for safety.

Variable Traction Control System

The variable traction control system optimizes the digging traction automatically depending on working condition by controlling HST pump, motor and engine. Combined with the function of torque proportioning differentials, or optional limited slip differential this system exerts the following effects.

- Facilitates operation on soft ground where the tires of the machine are apt to slip.

- Eliminates excessive bucket penetration and reduces tire slippage during stockpile loading to improve the work efficiency.

- Reduces tire slippage to extend the life of tires. Furthermore, the maximum tractive effort can be adjusted in five stages while the traction control switch is ON. This allows the operator to select the optimum tractive effort for diversified road conditions.

S-mode

Setting the switch to S-mode allows the machine to get the optimum driving force for operations on slippery road surfaces, like snow-removal on snow surface, resulting in reduced tire slippage and facilitation of the operation. Unexpected tire slippage on slippery road surface is suppressed by controlling the engine speed and HST motor when traveling at a low speed. (S-mode is effective only in forward traveling.)

Max. traction switch

Max. traction switch is located on the work equipment control lever. When traction control switch is at ON position or S-mode is selected, pushing this switch cancels the setting of the traction control temporarily and increases the tractive effort to its 100% value. Then pushing the max. traction switch again or operating the F/R lever returns the tractive effort to the set value automatically. This switch is useful for operations such as piling up work where large tractive effort is required temporarily.

Maximum Dumping Clearance and Reach

The long lift arms provide high dumping clearances and maximum dumping reach. The operator can even level loads on the body of a dump truck easily and efficiently.

INCREASED RELIABILITY

Komatsu Components

Komatsu manufactures the engine, transfer case and hydraulic components on WA250-6 wheel loader. Komatsu loaders are manufactured with an integrated production system under a strict quality control system.

High-rigidity Frames and Loader Linkage

The front and rear frames and the loader linkage have got more torsional rigidity to provide resistance increased to stresses. Frame and loader linkage are designed to accommodate actual working loads, and simulated computer testing proves its strength.

Wet Multiple-disc Brakes and Fully Hydraulic Braking System

This system result in lower maintenance costs and higher reliability. Wet multiple-disc brakes are fully sealed. Contaminantsare kept out, reducing wear and resulting maintenance. Brakes require no adjustments for wear, meaning even lower maintenance. The parking brake is also an adjustment-free, wet multiple-disc for high reliability and long life. Added reliability is designed into the braking system by the use of two independent hydraulic circuits. Provides hydraulic backup should one of the circuits fail. Fully hydraulic brakes mean no air system to bleed, or the condensation of water in the system that can lead to contamination, corrosion, and freezing.

Sealed Connectors

Main harnesses and controller connectors are equipped with sealed connectors providing high reliability, water resistance and dust resistance.

Reliable Hydraulic Line

Flat face-to-face O-ring seals are used to securely seal hydraulic hose connections and to prevent oil leakage

EXCELLENT OPERATOR ENVIRONMENT

The large space cab offers exceptional driver’s comfort - comparable to a passenger car. The large, frameless window gives an unobstructed view of the bucket and tires while the slanted rear end ensures a clear view to the rear. The low-noise designed cab with the air-cushioned seat and the fully adjustable console inside allow the operator to work comfortably and productively over long period.

Pillar-less Large Cab

A wide pillar-less flat glass provides excellent front visibility. The wiper arm covers a large area to provide great visibility even on rainy days. The large cab area providing maximum space for the operator. The front mounted air conditioner (A/C) was introduced to increase seat reclining and backward slide adjustment.

Great Rear Visibility

Center lined muffler and air intake piping provides great rear right and left hand side visibility.

Best Position for Comfort

Tiltable steering column

The operator can tilt the steering column to provide a comfortable working position.

Adjustable wrist rest

The height of wrist rest is adjustable. It allows operators to adjust the controls to a comfortable position.

Easy-to-operate Loader Control Mono-lever

The new mono-lever using Proportional Pressure Control (PPC) allows the operator to easily operate the work equipment, to reduce operator fatigue and to increase controllability. The adjustable wrist rest provides the operator with a variety of comfortable operating positions.

Right-side Control Panel

The operator can easily select the speed range, maximum travel speed in 1st, tractive effort

Low-noise Design

The large cab is mounted with Komatsu’s unique ROPS/FOPS (ISO 3471/ISO 3449) viscous mounts. The low-noise engine, hydraulically driven fan, and hydraulic pumps are mounted with rubber cushions, and the cab sealing is improved to provide a quiet, low-vibration, dustproof with pressurizing, and comfortable operating environment.

- Operator’s ear noise level: 70 dB(A)

- Dynamic noise level (Outside): 104 dB(A)

Electronically Controlled Directional Lever

The operator can change direction with a touch of his fingers without removing his hand from the steering wheel. Solid state electronics makes this possible.

Options

12 V outlet

In addition to 24 V cigarette lighter, 12 V outlet is provided in the cab.

Electronically Controlled Suspension System

Electronically Controlled Suspension System uses an accumulator which absorbs some of the shock in the boom arm, giving the operator a much smoother ride. This reduces operator fatigue and reduces material spillage during load and carry operations. Electronically Controlled Suspension System operation is speed sensitive and turned off automatically below 5 km/h speed, meaning that the boom won’t move during stationary digging.

EASY MAINTENANCE

Maintenance Accessibility

With long service intervals and best-in-class accessibility, Komatsu WA250-6 reduces the time and money you need to suspend on maintenance. A gas spring helps the operator open and close each gull-wing side door for easy daily servicing. The doors open in two steps and be able to use upper or lower stop position as the situation demands.

The service doors are designed as gull-wing doors. They allow you convenient and safe access to the daily service points from the ground.

Protective Guards

Thermal guards for high temperature exhaust manifold are installed

Protective guards for rotating parts of the alternator and the air conditioner compressor are installed.

Equipment Management Monitoring System

Komatsu’s new main monitor keeps the operator informed of all machine functions at a glance. The monitor is located behind the steering wheel and displays different machine functions including fluid/filter change intervals and troubleshooting memory display functions. The main gauges are analog type for easy viewing and other functions utilize lighted symbols or Liquid Crystal Display (LCD) readouts.

Maintenance control and troubleshooting functions

- Action code display function: If an abnormality occurs, the monitor displays action details on the character display at the bottom center of the monitor.

- Monitor function: Controller monitors engine oil level, pressure, coolant temperature, air cleaner clogging, etc. If controller finds abnormalities, the error is displayed on LCD.

- Replacement time notice function: Monitor informs replacement time of oil and filters on LCD when replacement intervals are reached.

- Trouble data memory function: Monitor stores abnormalities for effective troubleshooting.

Easy Radiator Cleaning

Hydraulic driven fan with reverse rotation

If the machine is operating in adverse conditions, the operator can reverse the hydraulic cooling fan from inside the cab by pressing a switch on the control panel.

Automatic reversible fan (Optional)

The engine fan is driven hydraulically and can be operated in reverse automatically. When the switch is in the automatic position, the fan revolves in reverse for 2 minutes every 2 hours intermittently (Default setting).

Side-by-side cooling unit

The cooling system is isolated from the engine by a bulkhead to provide more efficient cooling and low noise. The radiator, air-to-air cooler and oil cooler are mounted side-by-side for more efficient cooling and
easy cleaning. A fully-opening, gas spring assisted rear grille gives the operator excellent access to the swing-out fan and coolers.

SAFETY

ROPS/FOPS Cab

The ROPS/FOPS cab is standard for operator’s safety. A wide pillar-less flat glass provides excellent front visibility, and a heated rear window provides excellent rear visibility in cold and freezing weather conditions.

- ROPS (ISO 3471) : Roll-over Protective Structure

- FOPS (ISO 3449) : Falling Objects Protective Structure

Rear-hinged Full Open Cab Door

The cab door hinges are installed to the rear side of the cab providing a large opening angle for the operator to enter and exit. The steps are designed like a staircase, so that the operator can get on and off the cab easily.

Alternate Exit of Cab

The door on the right side of the cab is provided as an alternate exit for use when the operator cannot get out through the door on the left side.

Other Safety Features

Two independent lines brake system

Added reliability is designed into the braking system by the use of two independent hydraulic circuits, providing hydraulic backup should one of the circuits fail.

Secondary steering (Optional)

If the steering pump is disabled, a secondary steering pump provides hydraulic flow.

Battery disconnect switch (Optional)

The battery disconnect switch is located in the right side battery box. This can be used to disconnect power when performing service work on the machine.

KOMATSU TOTAL SUPPORT

Komatsu Total Support

To keep your machine available and minimize operation cost when you need it, Komatsu Distributor is ready to provide a variety of supports before and after procuring the machine.

Fleet recommendation

Komatsu Distributor can study the customer’s job site and provide the most optimum fleet recommendation with detailed information to meet all of your application needs when you are considering to buy new machines or replace the existing ones from Komatsu

Product support

Komatsu Distributor gives the proactive support and secures the quality of the machinery that will be delivered.

Parts availability

Komatsu Distributor is available for emergency inquiry by the customers for genuine, quality guaranteed Komatsu parts.

Technical support

Komatsu product support service (Technical support) is designed to help customer. Komatsu Distributor offers a variety of effective services to show how much Komatsu is dedicated to the maintenance and support of Komatsu machine.

- Preventive Maintenance (PM) clinic

- Oil & Wear analysis program

Repair & maintenance service

Komatsu Distributor offers quality repair and maintenance service to the customer, utilizing and promoting Komatsu developed programs.

Komatsu Reman (Remanufactured) components

Komatsu Reman products are the result of the implementation of the Komatsu global policy which establishes and agrees to reduce the owning, operating and total Life Cycle Costs (LCC) to Komatsu’s customer through high quality, prompt delivery and competitively priced in own remanufactured products (QDC)

KOMTRAX

The Komatsu remote monitoring and management technology provides insightful data about your equipment and fleet in user-friendly format.

Energy Saving Operation Report

KOMTRAX delivers the energy-saving operation report based on the operating information such as fuel consumption, load summary and idling time, which helps you efficiently run a business.

Equipment Management Support

Through the web application, a variety of search parameters are available to quickly find information about specific machines based on key factors. Moreover, KOMTRAX finds out machines with problems from your fleet and shows you through an optimal interface

Optimal Strategy for Efficient Work

The detailed information that KOMTRAX puts at your fingertips helps you manage your fleet conveniently on the web anytime, anywhere. It gives you the power to make better daily and long-term strategic decisions.