NET HORSEPOWER52.2 kW 70 HP @ 2500 rpm

62 kW 84 HP @ 2500 rpm(Turbocharged)

OPERATING WEIGHT3435 kg 7,573 lb

Photos may include optional equipment.

SK

IDS

TE

ER

LO

AD

ER

SK1020-5

SK

1020

Photos may include optional eq

2

S K I D S T E E R L O A D E R

WALK-AROUNDSK1020-5

Two-Speed Travel (standard)Allows for low impact shift-on-the-go speedchanges between 10.5 kph 6.5 MPH work rangeand 16 kph 10 MPH travel range. Improves loadand carry cycle times and travel times betweenjob sites.

Long Wheel BaseThe Komatsu SK1020 skid steer loader hasone of the longest wheel bases in its class,1160 mm 45.7", giving the operator amore stable ride and a better platform foroperating high flow attachments.

Low Effort and FineHydraulic ControlThe 80 ltr/min 21 GPM auxiliary hydraulics canbe metered from 3.7 to 80 ltr/min.1 to 21 GPM orlocked into continuous flow and the PPC pedalcontrol results in low effort and fine control.

Standard Universal AttachmentQuick CouplerA universal quick coupler enables commonattachments to be changed quickly and with littleeffort. Auxiliary hydraulics with flat faced connectorsare standard. Most competitors’ attachments can beutilized on Komatsu’s skid steer loaders.

Maximum Performance andPrecise Control with HydrauMindTM

Komatsu’s smooth and precise HydrauMindTM system letsthe operator feel the performance of the machine. TheClosed Load Sensing System (CLSS) hydraulics aredesigned for both single and simultaneous movementswhich achieves unsurpassed control in positioning thebucket.

Easy to use Travel and Loader PPC JoysticksLow effort Proportional Pressure Control (PPC) joysticks operate travel andloader operations. Easy to use PPC controls help operators of all skill levelswork precisely and efficiently all day long – with minimum effort andreduced operator fatigue.

3

quipment.

SK I D ST E E R LOA D E RSK1020-5

NET HORSEPOWER52.2 kW 70 HP @ 2500 rpm62 kW 84 HP @ 2500 rpm

[TurboCharged]

OPERATING WEIGHT3435 kg 7,573 lb

1160 mm 45.7"Long Wheel Base

"APC"Automatic Power Control

16.0 kph 10 MPH Max.Travel Speed

Outstanding VisibilityWork with confidence and increased productivity.The standard top and rear shatter resistant windows,large side screen area as well as a superior view ofthe bucket, cutting edge and corners give theoperator excellent 360° job site visibility.

Automatic Power Control "APC"Patented Komatsu anti-stall hydraulic system designed toallow full utilization of engine power. The operator can workwith full engine power during the toughest job siteapplications without worrying about engine stall.

Optional "Super Flow" AuxiliaryHydraulicsThe optional “Super Flow” auxiliary hydraulic circuitenables the SK1020 to utilize many high flow attachments.Cold planers, stump grinders, flail mowers and otherattachments can be easily operated with the PPC joysticks.

Intelligent Operator ControlsKomatsu has enhanced operator productivity and efficiencywith their technologically advanced operator restraint bar.The operator restraint bar incorporates a LCD gauge paneland warning light system which is easily engaged and actsas a forearm rest. In addition, a Loader Arm Float Functioncontrol can be engaged on the joystick for enhanced backdragging or attachment applications.

Enhanced Loader Arm andBucket ControlThe hydraulic self leveling (up only) bucket with2290 kg 5,038 lb breakout force enhances theproductivity of the operator on the job site. The45° dump and 30° rollback angles of the bucketallow for a faster dump cycle and load retentionover rough terrain.

4

OPERATORS COMPARTMENTSK1020-5 S K I D S T E E R L O A D E R

Superior Engine ControlThe engine RPM’s can be controlled by either thehand throttle, the foot accelerator, or incombination for tight work sites. The footaccelerator is not available with hand and footcontrol pattern.

Control Pattern ChangeValve Lever - OptionalConvert from the Komatsu pattern tothe optional pattern with the flip of alever. This allows the Komatsu skidsteer loader to be customized to meetthe individual operators needs.Especially useful for rental centers orwhenever different operators need touse the machine on the job site.

Enhanced OperatorComfortThe operator restraint bar isergonomically designed to provideforearm support and restrains theoperator from unintentionally leaving theseat. The seat incorporates a switchwhich de-activates the travel andhydraulic circuits while activating thewet disc brakes when the operatorleaves the machine. A 76 mm 3'' seatbelt is provided as standard equipment.

Effective Operator Cab EnvironmentAll instrumentation is within the peripheral view of the operator.The function switches are waterproof and placed within easyreach of the operator for comfort and convenience.

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SK1020-5SK I D ST E E R LOA D E R

Auxiliary HydraulicControlThe auxiliary hydraulic control providesexcellent hydraulic power to frontmounted hydraulic attachments. Thefoot pedal can be utilized with Komatsuor optional control pattern.

SPLIT DESIGNED OPERATORRESTRAINT BAR

PPC JOYSTICK CONTROLS

PATTERN CHANGEVALVE LEVER

SUPERIOR OPERATORENVIRONMENT

PPC Joystick ControlsAnother advanced feature is the loweffort Proportional Pressure Control(PPC) joysticks that operate travel andloader operations. Easy to use PPCcontrols help operators of all skill levelswork precisely and efficiently all daylong – with minimum effort andreduced operator fatigue.

Split Designed Operator Restraint BarThe split designed operator restraint bar is easily engaged from theleft and right side respectfully. The gauge panels and indicator lightsare incorporated into the restraint bar for enhanced operatorefficiency, comfort and confidence.

Enhanced Operator ControlsThe gauge panel, warning and indicator lights aremounted on the operator restraint bar. Monitoringof all critical machine functions is easy, convenientand doesn’t distract the operator from the job athand. The control pattern is back lit to identifywhich pattern is in operation.

SK1020-5

6

S K I D S T E E R L O A D E R

SERVICEABILITYTilt-ForwardROPS/FOPS, TopEngine Cover &Floor PlateThis patented feature allows thecab to tilt with the loader armsdown or up. Access to theengine, hydraulic and hydrostaticcomponents is easily achieved.

Hinged Top EngineCover and RearDoor PanelThe top engine cover opens out ofthe way for excellent engine accessand the hinged rear door allowsfor convenient daily service checks.

250 Hour PinGreasing IntervalMinimizes daily downtime, reducesowning and operating costs. Thespecial bronze bushings arespecially treated and accompaniedwith dust seals.

Removable PolyvinylFuel TankThe fuel tank is constructed ofpolyvinyl plastic, corrosion resistant,and guards against condensation. Alarge opening with a strainer allowsfor easy re-fueling and an externallevel indicator is visible during re-fueling. The fuel tank is easilyremoved with a fuel shut-off andquick release.

O-Ring Face SealFittings andConnectorsSpecific torque settings are notrequired for optimal performance.The fitting and connectors have alow sensitivity to vibration and arereusable even after severaldisassemblies.

Side By SideRadiator and OilCooler The radiator and oil cooler areaccessible for cleaning from eitherside and are tiltable for additionalinspection.

Loader ArmMaintenanceSupport StrutAllows the operator to engage ordisengage the maintenancesupport strut without leaving theoperator’s seat.

Multi-Viscosity OilCan Be Used for AllFluid RequirementsThe engine oil, hydraulic oil andchain case oil utilize the samegrade of multi-viscosity oil.

ENGINE-EPA TIER 2 CERTIFIED

Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Komatsu S4D98E-2NFDType . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Diesel engine, 4 cycleBore x stroke . . . . . . . . . . . . . . . . . . . . . . . .98 x 110 mm 3.85 x 4.334 inNumber of cylinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.4 ltr 203 in3

Combustion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Direct injectionAspiration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TurbochargedRated power:(SAE J1349) . . . . . . . . . . . . . . . . . . . . . . . .62.0 kW 84 HP @ 2500 rpmMax. torque . . . . . . . . . . . . . . . . . . . . . . .286 Nm 211 ft. lb. @ 1600 rpm

Cooling system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .WaterAir filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Dry type, dual elementStarting system . . . . . . . . . . . . . . . . . . . . .Electric motor with pre-heating

air system for cold weather 0° C (32° F)

TRANSMISSION

Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .HydrostaticPumps . . . . . . .2 x variable displacement with 2 stage and APC systemMotors . . . . . . . . . . . . . . . . . . . . . . . . . .2 x axial pistons with two speedsFinal transmission with heavy duty type roller chains immersed in oil bath

connected to the four driving axlesSpeeds: - Working . . . . . . . . . . . . . . . . . . . . . . . . . . .10.0 km/h 6.5 mphSpeeds: - Travel . . . . . . . . . . . . . . . . . . . . . . . . . . . .16.0 km/h 10.0 mphSealed wet-disc paking brakes with automatic engagement when operator

exists the cab.

HYDRAULIC SYSTEM

Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .KomatsuPump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .GearMax. flow - auxiliary hydraulic . . . . . . . . . . . . . .80.0 ltr./min 21.0 gal/minMax. pressure - auxiliary hydraulic . . . . . . . . . . . . . . . .210 bar 3,045 psiControl valve . . . . . . . . . . . . . . . . . . . . .3 elements fully Servo-controlled

High flow auxiliary hydraulic system “SUPER FLOW” (OPTIONAL):

Max. flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .130 ltr./min 34 gal/minMax. pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .210 bar 3,045 psiControl valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 elements

LOADER

Performance without rear counterweightsOperating load (ISO 5998) . . . . . . . . . . . . . . . . . . . . . . .907 kg 2,000 lb.Tipping load (ISO 8313) . . . . . . . . . . . . . . . . . . . . . . . .1814 kg 4,000 lb.Bucket breakout force (ISO 8313) with short lip bucket 2290 kg 5,038 lb.Bucket breakout force (ISO 8313) with long lip bucket .1940 kg 4,279 lb.

CONTROLS

Proportional Pressure Control (PPC) joystick levers. The left hand joystickcontrols the travel, the right joystick controls the loader equipment.The PPC foot pedal controls the auxiliary hydraulic circuit for attachments.Control levers are inoperative when the operator arm rest is raised or theoperator is not seated.Control pattern change valve is optional equipment. The optional controlpattern splits the travel and the loader controls between both joysticklevers.

ELECTRIC SYSTEM

Rated voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 VBattery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100 AhAlternator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40 A

SERVICE REFILL CAPACITIES

Hydraulic system . . . . . . . . . . . . . . . . . . . . . . . . . . .50.0 ltr. 13.0 US gal.Fuel tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73.0 ltr. 19.0 US gal.Chain cases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32.0 ltr. 8.3 US gal.Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12.5 ltr. 3.2 US gal.Engine coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8.0 ltr. 2.0 US gal.

TIRES

Optional . . . . . . . . . . . . . . . . . . . .12-16.5 10PR heavy duty flotation tires33 x 15.5-16.5 10PR super wide flotation tires

OPERATING WEIGHT

Operating weight of machine with standard bucket,full tank of fuel and an 80 kg 176 lb operator (ISO 6016) 3435 kg 7,573 lb.

SK1020-5

7

SK I D ST E E R LOA D E R

STANDARD EQUIPMENT

• Halogen working lights(2 front)

• Horn• Top window• Rear window• Loader arm float

function• Two-speed transmission

• Central Monitor Panelincluding hour meter, fuellevel indicator, engine coolanttemperature guage. Warninglights: alternator, engine oilpressure, air filter restriction,hydraulic oil filter restriction,working lights, parking brakes,travel speed, float functionand engine preheat

OPTIONAL EQUIPMENT

• Accelerator pedal• Adjustable seat with

76 mm 3" wide seat belt• Wet-disc parking brakes• Automatic Power Control

system (anti-stall)• Backup alarm• Auxiliary hydraulics• Cup holder

• ROPS-FOPS (Level I) opencanopy

• Operator restraint bar withsensor for parking brakes& hydraulic system lock-out

• Universal front attachmentcoupler

• Bucket self-leveling (up only)

• Engine air intake pre-cleaner• Rear counterweights• Cold weather starting package• Control pattern change valve• Lifting hooks on cab roof• Working lights (2 rear)

• Amber rotating beacon• SUPERFLOW auxiliary

hydraulics version, withadditional auxiliary hydrauliccircuit for attachments

• Suspension seat• Auxiliary hydraulics over-ride

control• Spark arresting muffler• Fenders• Ride control

• 12 volt electrical outlet• Master electrical disconnect

switch• Cab enclosure with AC, heater

and defroster

DIMENSIONS

1740

mm

66"

2080

mm

82"

1030 mm 40"1160 mm 45.7"3680 mm 145"

1490 mm 58"

690 mm 27"

4100

mm

161

"

2300

90"

3100

122

"

30

45

210

mm

8.3

"

30 1260 mm 49"1500 mm�59"

2265 mm�89"

A

B�������������������

1650 mm�6�"

290 mm�11"290 mm�11"

• All dimensions, weights, and performance values based on SAE J732c and J742b standards. Static tipping load and operating weight shown include 12.00 x16.5 8PR tires, lubricant, coolant, full fuel tank, ROPS canopy, and operator. Machine stability and operating weight are affected by counterweight, tire size, andother attachments.

This specification sheet may contain attachments and optional equipment that are not available in your area. Please contact your localKomatsu Utility Division distributor for those items you may require. Materials and specifications are subject to change without notice.

Dimensions are shown using a long-lip loader bucket.

A = 1730 mm 68''= 1880 mm 74''= 2030 mm 80''

B = 1675 mm 66'' with12.00 x 16.5 tiresnarrow width=1830 mm 72'' with12.00 x 16.5 tireswide width= 1980 mm 78'' with33.00 x 15.5 x 16.5 tiressuper wide width

Base Machine Base Machine with 120 kg 265 lb. Base Machine with 120 kg 265 lb.

Bucket with 1880 mm 74" Long Lip Bucket Counterweights & 1880 mm 74" Long Lip Bucket Counterweights & 1219 mm 48" Pallet Forks

Bucket capacity SAE rated 0.47 m3 0.61 yd3 0.47 m3 0.61 yd3 N/A N/A

Bucket width 1880 mm 74" 1880 mm 74" N/A N/A

Bucket weight

(1219 mm 48" Pallet fork weight) 211 kg 465 lb 211 kg 465 lb 172 kg 378 lb

Static tipping load 1814 kg 4,000 lb 1996 kg 4,400 lb 1309 kg 2,880 lb

Operating capacity - 50% of tipping load 907 kg 2,000 lb 998 kg 2,200 lb 655 kg 1,440 lbDump clearance, maximumheight and 45° dump angle 2300 mm 90.5" 2300 mm 90.5" N/A N/A

Height to bucket hinge pin 3100 mm 122" 3100 mm 122" 3100 mm 122"

Reach at maximum heightand 45° dump angle 690 mm 27.1" 690 mm 27.1" N/A N/A

Operating height Fully raised 4100 mm 161" 4100 mm 161" N/A N/A

Clearance circle-front 2265 mm 89.2" 2265 mm 89.2" 2286 mm 90"

Clearance circle-rear 1650 mm 64.9" 1650 mm 64.9" 1650 mm 64.9"

Operating weight 3435 kg 7,573 lb 3560 kg 7,848 lb 3528 kg 7,761 lb

www.KomatsuAmerica.com Komatsu America Corp. is an authorized licensee of Komatsu Ltd.Materials and specifications are subject to change without notice

is a trademark of Komatsu Ltd., Japan

KUSS153-04 ©2006 Komatsu America Corp. Printed in USA K12(5M) C 12/06 (EV-2)