3 WA250-5 - Komatsu Ltd.

1 WA250-5 HORSEPOWERG ross: 104 kW140 HP / 2000 rpmNet: 101 kW135 HP / 2000 rpmOPERATING WEIGHT10565 10710 kg 23,292 23,611 lbBUCKET yd3 Photo may include optional LOADERWA250 Larger cab layout Extended service intervalsExpanded main monitor and troubleshooting displayReduced operator noise to 70 dB(A)Tiltable steering columnEasy-to-operate loader control mono-lever using Pressure Proportional Control (PPC)Large breakout forceMaintenance-free fully hydraulic wetmultiple-disc service and parking brakesElectronically controlled Hydrostatic Transmission(HST) with variable shift control systemTraction control systemWHEELLOADERWALK-AROUNDWA250-52 Komatsu -integrateddesign offers the bestvalue, reliability, and , powertrain, frame,and all other major componentsare engineered by get a machine whosecomponents are designed to work together for higherproduction, greater reliability.

2 And more and low emission Komatsu SAA6D102E-2emissionized engineFull side opening gull-wing engine doorsGround level servicingand fluid checksStaircase-type stepswith large rear-hinged doorsSide-by-side type coolersfor easy access and cleaningExtremely low fuel consumptionRadial sealedair cleanerOverrun protection systemSwing-out hydraulicradiator fanFlat face "O-ring" hydraulic sealsfor extended lifeSealed connectorsWHEEL LOADERHORSEPOWERG ross: 104 kW140 HP / 2000 rpmNet: 101 kW135 HP / 2000 rpmOPERATING WEIGHT10565 10710 kg 23,292 23,611 lbBUCKET yd3WA250-53 Photos may include optional and Low Emission EngineA powerful SAA6D102E-2 turbocharged air-to-air after-cooled diesel engine provides an output of 101 kW135 HPfor the WA250-5 .

3 This engine is EPA Tier 2 and EUStage 2 emissions Fuel ConsumptionThe fuel consumption is reduced up to 15%* due to the high-torque engine and HST with maximum efficiency in the low- speed range.*V-shape loading (25 sec. cycle time)Electronically-controlled HST Using a 1-pump,2-motor System The 1-pump, 2-motor system allows for high-efficiencyand high tractive effort. Engine power is transmittedhydraulically to a transfer case, then manually out to thedifferentials and out to the four driving wheels. HST provides quick travel response and aggressive driveinto the pile. The variable displacement system automati-cally adjusts to the tractive effort demand to providemaximum power and efficiency.

4 Full auto-shifting eliminates any gear shifting and kick-down operation to allow the operator to concentrate ondigging and loading. When high drive torque is needed for digging, climbingor initiating movement, the pump feeds both motors. Thiscombination makes the loader very aggressive andquick. Under deceleration, the HST system acts as a dynamicbrake on the mechanical drive system. The dynamicbrake can hold the loader in position on most workableslopes. This can be an advantage in stockpiling andramp loading. As the machine moves and gains ground speed , thetorque demand decreases and the low speed motor iseffectively removed from the drive system by a clutch.

5 Atthis point, the flow is going to the high- speed motor andthe low- speed motor is not causing a drag on the sys-tem. An inching pedal gives the operator excellent simultane-ous control of his travel and equipment hydraulic depressing the inching pedal, drive pump flow to themotors will decrease, reducing ground speed and allow-ing the operator to use his accelerator to increase flow tohis equipment hydraulics. Depressing the inching pedalfurther will activate the service Productivity and Low Fuel ConsumptionPiston pumpEngineLow speedpistonmotorHigh speedpistonmotorTransfer caseTo differentialsPRODUCTIVITYFEATURES4 WHEELLOADERWA250-5 Electronically-controlled HST with Variable ShiftControl SystemThe operator can choose between first, second, third orfourth maximum speeds by dialing the speed range v-cycles, the operator can set the speed control switch to1 or 2, which willgive him aggres-sive digging, quickresponse and fasthydraulics.

6 Forload and carry, hecan select 3 or 4which will still giveaggressive diggingbut with muchfaster variable shiftswitch allows theoperator to adjust his machine speed in confined v-loadingapplications. When in 1, the operator can adjust his travelspeed using the variable shift switch to match his machinespeed and hydraulics to the distance he must travel. Traction Control SystemIn limited traction situations where the operator would liketo avoid tire slippage (such as sandy or wet surface opera-tions), he can automatically reduce slippage by activatingthe traction control feature. Putting the traction controlswitch in the ON position limits the maximum amount oftractive control willbe an advantage incertain appplica-tions such as trans-fer stations wherethe loader may beworking on slipperyconcrete.

7 48121620 Variable rangeof travel speedTravel speedTractive effortkm/hMPH081012642048121620 Tractive effortTravel speedReducedkm/hMPH0810126420 Traction ControlVariable Shift ControlWHEEL LOADERWA250-55 Main Monitor - Equipment ManagementMonitoring SystemKomatsu s main monitor keeps the operator informed of allmachine functions at a glance. The monitor is located behindthe steering wheel and displays various different machinefunctions including fluid/filter change intervals and trou-bleshooting memory display functions. The main gauges areanalog type for easy viewing and other functions utilize lightsymbols or Liquid Crystal Display (LCD) RadiatorThe Komatsu cool-ing system is isolat-ed from the engineto provide more efficient cooling andlow noise.

8 Theswing-out hydraulicfan allows the oper-ator to quickly cleanout the cooling sys-tem. The radiator,air-to-air cooler and oil cooler are mounted side-by-side formore efficient cooling and easy cleaning. A fully-opening, gasspring assisted rear grill gives the operator excellent accessto the swing-out fan and Side-opening Gull-wing Engine DoorsGround level engine service and daily service checks aremade easy with the gas spring assisted full side openinggull-wing Service IntervalExtended engine oil service interval:250 H500 HExtended drive shaft greasing interval:1,000 H4,000 HOverrun Prevention SystemWhen the machine descends a slope of six degrees or less,maximum travel speed is automatically restricted to approxi-mately 38 km/h23 MPH, for safety protection against dam-age of power train components and brakes by sensing thetravel speed and controlling the discharge amount of theHST pump and motor.

9 When the machine descends a steepslope and the travel speed reaches 36 km/h22 MPH, thecaution lamp lights up to inform the operator to reduce thetravel : When the machine descends a steep slope, the useof the service brake is necessary to limit travel RELIABILITY AND SERVICEABILITY6 WHEELLOADERWA250-5 Fully Hydraulic Wet Multiple-disc Service BrakesThe dual wet multiple-disc brakes at each wheel are fullysealed and adjustment free to reduce contamination, wearand maintenance. The result is lower maintenance costs andhigher dependability is designed into the braking system bythe use of two independent hydraulic circuits, providinghydraulic backup should one of the circuits the brake oil pressure drops, the warning lamp flashes andthe warning buzzer sounds parking brake is mechanically controlled by a lever in FramesThe front and rear frames along with the loader linkage havehigh rigidity to withstand repeated twisting and bending loadsto the loader body and linkage.

10 Both the upper and lowercenter pivot bearings use tapered roller bearings forincreased structure is similar to those of largesized loaders and the reinforced loader linkage ensures Face-to-face O-ring SealsFlat face-to-faceO-ring seals areused to securelyseal all hydraulichose connectionsand to prevent Electrodeposition Primer Paint/PowderCoating Final PaintCathion electrodeposition paint is applied as a primer paintand powder coating is applied as a topcoat to the exteriormetal sheet parts. This process results in a durable rust-freemachine, even in the most severe environments. Someexternal parts are made of plastic to provide long life andhigh impact ConnectorsMain harnesses and controller connectors are equipped withsealed connectors providing high reliability and dust and cor-rosion ComponentsKomatsu manufacturesthe engine, transfercase, differentials andelectric parts on thiswheel loader.