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Komatsu Trucks 730E-8
730E-8 Electric Drive Truck
The 203 ton capacity 730E-8 is a very versatile electric drive truck that features 1,860 flywheel horsepower. The cab has an integral ROPS, air ride seat, dynamic retarding and power steering with auto emergency steering to make the operator comfortable and more productive. To make the 730E more productive, a trolley assist option is available for circumstances where an overhead electrified trolley system can be used.
Make and model*
Number of cylinders
Gross horsepower** @ 1900 rpm
Net flywheel power*** @ 1900 rpm
* Optional Tier 4 emission compliant engine for North American market. Non-emissionized engine for markets outside of North America.
** Gross horsepower is the output of the engine as installed in this machine, at governed rpm and with engine manufacturer's approved fuel setting. Accessory losses included are water pump, fuel pump and oil pump.
***Net flywheel power is the rated power at the engine flywheel minus the average accessory losses. Accessories include fan and charging alternator. Rating(s) represent net engine performance in accordance with SAE J1349 conditions.
Dual impeller in-line blower
AC Torque Control System
GEB35 Induction Traction Motors
* Wheel motor application depends upon gross vehicle weight, haul road grade, haul road length, rolling resistance and other parameters. Komatsu and G.E. must analyze each job condition to assure proper application.
Tires and Rims
Rock service, tubeless, tires
Flange mount rim
686 mm x 1448 mm x 152 mm 27'' x 57'' x 6'' rim assembly.
Rims rated at 758 kPa 110 psi cold inflation pressure.
* Tires should meet application requirements for tkph/tmph, tread, compound, inflation pressure, ply rating or equivalent, etc.
All-welded steel flat floor body with horizontal bolsters and full canopy. Eyebrow, rear wheel rock ejectors, body up sling and rubber mounts on frame are standard. Pivot exhaust heating optional.
Advanced Operator Environment with integral 4-post ROPS/FOPS Level 2 cab, adjustable air suspension seat w/lumbar support and arm rests, full-size passenger seat, maximum R-value insulation, tilt and telescoping steering wheel, electric windshield wipers w/washer, tinted glass, power windows, Komatsu Payload Weighing System, 61,000 Btu/hr heater and defroster, 19,900 Btu/hr air conditioning (HFC - 134A refrigerant).
Advanced technology, full butt-welded box sectional ladder-type frame with integral ROPS supports, integral front bumper, rear tubular cross members, steel castings at all critical stress transition zones, rugged continuous horsecollar.
482.6 mPa tensile strength steel
620.5 mPa tensile strength steel
Rail depth (minimum)
Top and bottom plate thickness
Side plate thickness
Drive axle mounting
Pin and spherical bushing
Drive axle alignment
Swing link between frame and axle
System meets ISO 3450/1996.
Service brakes: all-hydraulic actuated.
Wheel speed disc. Three calipers on a 1213 mm / 47.75" O.D. disc
Dual disc armature speed. Two 635 mm / 25" O.D. discs per side. One caliper per disc.
Automatically applied prior to hydraulic system pressure dropping below level required to meet secondary stopping requirements.
Wheel brake locks
Spring-applied, hydraulically released, with speed application protection.
Electric dynamic retarder (max.)
3,200 hp / 2387 kW
Continuously rated high-density blown grids w/retard at engine idle and retard in reverse propulsion.
Variable rate hydro-pneumatic with integral rebound control
Max. front stroke
Max. rear stroke
Max. rear axle oscillation
L&M radiator assembly, split-flow, with deaerator-type top tank
Radiator frontal area
117 U.S. gal
59 U.S. gal
210 U.S. gal
Motor gear box (each)
10 U.S. gal
800 U.S. gal
*Includes lube oil filters
Accumulator assisted with twin double acting cylinders provide constant rate steering. Secondary steering automatically supplied by accumulator.
Turning circle diameter (SAE)
135 U.S. gal
In-line replaceable elements
Single, full-flow, 100 mesh
Hoist and steering
Dual, in-line, high pressure
Brake component cabinet
Above deck, easily accessible with diagnostic test connections
Two 3-stage dual-acting outboard cylinders, internal cushion valve, over-center dampening
Two pumps, single package, end of alternator
Hoist and brake cooling
Tandem gear pump with output of 666 lpm 176 gpm at 1900 rpm and 18961 kPa 2,500 psi
Steering and brake
Pressure-compensating piston pump with output of 254 lpm 67 gpm at 1900 rpm and 19134 kPa 2,775 psi
System relief pressures:
Steering and brake
4 x 8D 1450 CCA, 12 volt, in series/parallel, 220-ampere-hour batteries, bumper-mounted with disconnect switch.