United States - English

Current number of specifications

Komatsu 860E-1K Rock Truck

Selected Dimensions

A. Overall Length49 ft in14930 mm
C. Overall Height24 ft in7300 mm
D. Wheelbase20.8 ft in6350 mm


Electric Drive
ControlAC Torque Control System
Maximum speed (km/h)​64.5
Drive SystemKomatsu AC Drive
Dual Fan Main Blower419 m3/min 14,800 cfm
Electrical System
Alternator24 volt, 140 amp
Lighting24 volt
Cranking motorsTwo/24 volt
Capacity Struck159.6 yd3122 m3
Heaped (2:1, SAE)221 yd3169 m3
StructureFlat floor configuration
Weight74171 lb33643.4 kg
Canopy sheet6 mm 0.24'' 690 MPa 100,000 psi tensile strength steel
Front sheet10 mm 0.39'' Outer 10 mm 0.39'' Center 1379 MPa 200,000 psi tensile strength steel
Side sheet8 mm 0.31'' 1379 MPa 200,000 psi tensile strength steel
Floor sheet16 mm 0.63'' Outer 19 mm 0.75'' Center 1379 MPa 200,000 psi tensile strength steel
Payload560774.4 lb254363 kg
Loading Height20.9 ft in6.4 m
Number of Cylinders16
Power Measured @1900 rpm
Displacement3661.4 cu in60 L
Fuel TypeDiesel
Weight21182 lb9608 kg
Horse Power: SAE J19952700.8 hp2014 kw
Horse Power: ISO 9249 / SAE J13492550.6 hp1902 kw
Operating cycle4-cycle
Service Brake TypeOil-cooled, hydraulic-actuated, multiple disc brakes at each wheel.
Parking Brake TypeMultiple disc, spring-applied, hydraulically-released, integral wet disc park brake Rated to hold on ±15% grade at maximum gross vehicle weight.
Emergency brakesAutomatically applied prior to hydraulic system pressure dropping below level required to meet secondary stopping requirements.
​Wheel brake locksSwitch-activated​
​Electric dynamic retarder (max.)3469kW Continuously rated high-density blown grids w/retard at engine idle and reverse propulsion.
Max. service apply pressure (kPa)2400 psi16547.4 kPa
Total friction area per brake (cm2)75439
Fuel Tank1199.9 gal4542 L
Cooling system125 gal473 L
Hydraulic system350 gal1325 L
Crankcase74 gal280 L
Motor gear box32 gal121 L
Inverter cooling system6.6 gal25 L
Reserve Oil System30.1 gal114 L
Gross Weight1001698.9 lb454363 kg
Empty Weight441698.3 lb200351 kg
Weight Distribution Front - empty49 %
Weight Distribution Rear - empty51 %
Weight Distribution Front - loaded33.5 %
Weight Distribution Rear - loaded66.5 %
Standard tire50/80 R57
Hydraulic System
Hoist cylinderTwo 3-stage dual-acting outbound cylinders and internal cushion valve, over-centre damping.
Relief pressureHoist and brake cooling- 17237 kPa 2,500 psi Steering and brake-20685 kPa 3,000 psi
Hoist timePower-up loaded: 22 sec; Power-down: 13 sec; Float-down empty:23 sec
Turning circle diameter (SAE)101.7 ft in31 m
Reservoir250 gal946.4 L
FiltrationIn-line replaceable elements
SuctionSingle, full flow, 100 mesh
Hoist and steeringDual, in-line, high pressure
PumpsTwo pumps, single package, end of alternator
Turning Radius50.9 ft in15500 mm
Overall Length49 ft in14930 mm
Overall Height24 ft in7300 mm
Wheelbase20.8 ft in6350 mm
Width Over Tires-Rear26.2 ft in7980 mm