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EH750

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ENGINE

Model MTU Detroit Diesel Series 60
Configuration 4 Cycle, inline, 6 cylinder diesel
Emission Certification U.S. EPA Tier 3, E.U. Stage IIIA
Aspiration Turbocharged / Aftercooled
Rated Power SAE J1995, gross 391 kW (525 HP) at 2 100 min-1 (rpm)
Rated Power SAE J1349, net 362 kW (486 HP) at 2 100 min-1 (rpm)
Rated Power ISO 9249, net 362 kW (486 HP) at 2 100 min-1 (rpm)
Rated Power EEC 80/1269, net 362 kW (486 HP) at 2 100 min-1 (rpm)
Maximum Torque 2 373 Nm (242 kgf m) at 1 350 min-1 (rpm)
Piston Displacement 14 L
Bore and Stroke 133 x 168 mm
Torque Rise 33 %
Starting Electric

TRANSMISSION

Model Allison H5610A
Design Fully automatic, planetary type with integral lock-up converter
Mounting / Position Remote from engine and rear axle for serviceability
Ranges 6 forward, 2 reverse
Control Allison CEC2 electronics shift system with SEM (Shift Energy Management)

Maximum Speeds @Rated Engine Speed

DRIVE AXLE

Model Differential 2052
Axle Design Full floating axle shafts using a model 2052 differential and single reduction planetaries at each wheel
Traction Control An optional electronic feature that includes the Electronic Downhill Speed Control feature

Differential and Final Drive Ratios

Ratios Differential 3.13 : 1
Ratios Planetary 5.25 : 1
Ratios Total Reduction 16.43 : 1
Maximum Speeds with 18.00 R33 tires 68.2 km/h

TIRES

Front 18.00 R33(**)E4 (Radial) [Standard]
Rear 18.00 R33(**)E4 (Radial) [Standard]
Rim Width 330 mm (13 in)

Note:Certain job conditions may require higher rated TKPH (TMPH) tires in order to maintain maximum production. Hitachi recommends evaluating the job conditions and consulting the tire manufacturer to make proper tire selection.

ELECTRICAL SYSTEM

Twenty-four volt starting, lighting and accessories system.
Seventy ampere alternator with integral transistorized voltage regulator.
Two 12 V heavy duty batteries capable of 1300 cold cranking amps, each, at -17.8 degree C (0 degree F). A Hitachi solid state reprogrammable controller controls and monitors hauler systems, provides output information to control gauges and lights and incorporates connections for diagnostic tools.

BODY CAPACITY

Struck (SAE) 20.8 m3
Heap 3 : 1 25.4 m3
Heap 2 : 1 (SAE) 27.7 m3

Body capacity and payload subject to change based on customer specific material density, options and application.

WEIGHTS (Approximate)

Net machine weight stated below includes standard equipment.
Net machine weight changes will directly affect the Nominal Payload.

Chassis with Hoist 25 723 kg
Body 7 800 kg
Net Machine Weight 33 523 kg
Nominal Payload 38.1 tonnes
Target GMOW 71 598 kg

The Nominal Payload specification is calculated using the Hitachi Loading Policy. Specific job site requirements may result in an adjustment to the Nominal Payload weight. Consult your Hitachi dealer for a truck configuration which will match your haulage application.

Major Options

The following list of options are examples which will change the Nominal Payload.
Automatic Fire Suppression System
Body Liners, partial and heavy duty
Deck Mounted Mufflers

Weight Distribution

STEERING SYSTEM

Closed-center, full-time hydrostatic steering system using two double-acting cylinders, pressure limit with unload piston pump and brake actuation / steering system reservoir. An accumulator provides supplementary steering in accordance with ISO 5010 (SAE J1511). The Operators steering wheel offers 35 degrees of tilt and 47.7 mm of telescopic travel.

Steering Angle 42 degrees
Turning Diameter: (SAE) 16.15 m
Steering Pump Output 95.71 L/min
System Pressure 18.9 MPa

HYDRAULIC SYSTEM

Two 2-stage, double-acting cylinders, with cushioning in retraction, inverted and outboard mounted. Separate Hoist/Brake Cooling reservoir and independent tandem gear pump. Control valve mounted on reservoir.

Body Raise Travel 60 degrees
Body Raise Time (at 2 100 min-1 (rpm)) 11.5 seconds
Body Down Time (at idle) 15.5 seconds
Brake Cooling Pump Output (at 2 100 min-1 (rpm)) 200 L/min
Hoist Pump Output (at 2 100 min-1 (rpm)) 301 L/min
System Relief Pressure 17.2 MPa

BRAKE SYSTEM

Brake system complies with ISO 3450 (SAE J1473).
All-hydraulic actuated braking system provides precise braking control and quick system response. The brake controller has a unique variable front to rear brake proportioning that maximizes the stopping performance under all road conditions.

Service

All hydraulic actuated front dry disc brakes, and rear wet disc brakes.

Wet Disc Brake

The Hitachi wet disc brake is engineered for long service life even in the most extreme environments. The wet disc brakes are located on the rear axle and provide service braking, secondary braking, and retarding. The brakes are a multi-plate design, and continuously oil-cooled. The sealed design protects against environmental contamination for prolonged service life. The wet disc brake is designed with automatic retraction to prevent drag. Separate pedals activate the service braking and retarding functions.

Front Axle - Dry Disc

Disc Diameter Each (2 discs/axle) 673 mm
Brake Surface Area Per Axle 4 130 cm2
Lining Area Per Axle 1 390 cm2
Brake Pressure (Max.) 15.9 MPa

Rear Axle - Oil-Cooled Wet Disc

Brake Surface Area Per Axle 37 200 cm2
Brake Pressure (Max.) 8.3 MPa

Secondary

Two independent circuits within the service brake system provide fully modulated reserve braking capability. System also incorporates automatic application when loss of pressure is detected.

Parking

Dry disc mounted on differential input shaft. Controlled by a toggle switch on the dash. Automatically applied if brake hydraulic pressure is lost.

Size (Diameter) 558 mm

Retarder

Foot-operated valve controls all-hydraulic actuation of oil-cooled wet disc brakes on rear axle. System provides modulated pressure to rear brakes for constant speed control.

Continuous 484 kW (649 HP)
Intermittent 969 kW (1 300 HP)

Load / Dump Brake Apply

Through activation of a switch by the operator, a solenoid is energized, sending full brake pressure to apply the rear Wet Disc brakes. For use during the load and dump cycles.

HI-TECH ROPS / FOPS CAB

Hi-Tech ROPS / FOPS Cab

ROPS complies with ISO 3471 and SAE J1040-May 94. FOPS complies with ISO 3449. Double wall construction of 11 gauge inner and outer steel panels, lends itself to a more structurally sound cab. Multiple layered floor mats act to absorb sound and control interior temperature.
A properly maintained cab from Hitachi, tested with doors and windows closed per work cycle procedures in ISO 6394: 1998 (dBA), results in an operator sound exposure Leq (Equivalent Sound Level) of 81 dB(A).
A three-point rubber iso-mount arrangement to the deck surface minimizes vibration to the operator compartment.

Excellent Serviceability

A removable front panel allows easy access to service brake valves, retarder valve and heater assembly. A removable cover located behind the operators' seat provides easy access to the Transmission Contoller (TCU), Central Contoller (CCU) and all electrical junction points.

Comfort and Ease of Operation

A flat panel style dashboard positions controls within easy reach and visual contact. A full complement of easy-to-read gauges, automobile type monitor with warning system, a spacious environment, multiple position adjustable seat, tilt/telescopic steering wheel, filtered cab ventilation and door locks all contribute to operator convenience, control and comfort.

SUSPENSION

Front and Rear Suspension

The ACCU-TRAC suspension system features independent trailing arms for each front wheel with NEOCON struts, containing energy absorbing gas and compressible NEOCON-E (TM) fluid, mounted between the king pins and the frame. This arrangement allows a wider front track that provides a better ride, improved stability and a reduced turning circle.
The rear axle housing has an A-frame mounting. The rear NEOCON struts are mounted in a more vertical position which allows a more pure axial loading and reduces the tractive and braking forces transmitted to the nose cone.

NEOCON struts outperform competitive strut designs by improving isolation, stability, and control. Improved isolation means reduced impact loading on the structural members of the machine and greater operator comfort, resulting in longer equipment life and increased productivity. Improved stability means more consistent dynamic response of the machine to fluctuating load energy, resulting in predictable machine performance. Improved control means better machine maneuverability.

The frame and ACCU-TRAC suspension system are designed to work in unison to provide maximum structural integrity and operator comfort. The fabricated rectangular frame rail construction provides superior resistance to bending and torsional loads while eliminating unnecessary weight.
The unique ACCU-TRAC independent trailing arm suspension absorbs haul road input, minimizing suspension-induced frame twisting while providing independent tire action. NEOCON ride struts are mounted with spherical bushings, eliminating extreme sidewall forces by ensuring a purely axial input to the ride strut. The wide track stance of the ACCU-TRAC suspension system and the long wheel base assure a more stable, comfortable ride.

BODY

The body has been made to the flat floor, flat tail chute design. The rear hinge has been designed to allow the hinge pin to float when the body is in the fully lowered position. The weight of the body and payload is distributed across rubber body pads that are evenly spread across the length of the body rail-box that rests on the truck frame.
Thickness:

High yield strength alloy steel is also used for canopy side members and floor stiffeners. The Hitachi horizontal stiffener design minimizes stress concentrations.
Load shocks are dissipated over the entire body length. Closely spaced stiffeners provide additional protection by minimizing distances between unsupported areas.

SERVICE CAPACITIES

Crankcase (includes filters) 30.0 L
Transmission, Cooler and Lines 83.8 L
Cooling System 211.1 L
Fuel Tank 454 L
Hydraulics Hoist System 265 L
Hydraulics Steering System 112 L
Drive Axle Differential 55 L
Drive Axle Planetary Hub 24 L
Windshield Washers 5.7 L

Performance Data

NOTES:
Diagonal lines represent total resistance (Grade % plus rolling resistance %).
Charts based on 0 % rolling resistance, standard power of engine, standard tires and gearing unless otherwise stated.
1. Find the total resistance on diagonal lines on right-hand border of rimpull or retarder chart.
2. Follow the diagonal line downward and intersect the NMW or GMOW weight line.
3. From intersection, read horizontally right or left to intersect the rimpull or retarder curve.
4. Read down for machine speed.

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