EH 4500 Hitachi EH 4500 Specifications & Technical Data (2004—2008)

Electric drive

Euclid AC drive technology uses Siemens controls and proven GTO inverter phase modules. Dynamic retarding capacity to zero speed with selected technology. The alternator is directly mounted to the engine. Developed in conjunction with Siemens, Euclid AC drive technology provides superior performance with higher top speeds, better gradeability, and stronger retardation. Additionally, brushless operation reduces maintenance and running costs, while a long life to overhaul means less downtime and reduced running costs.

Front and Rear Suspension

For years, Euclid haulers have enjoyed an industry-wide reputation for superior suspension systems. That experience and knowledge has now been pushed to the next level, to develop the truly advanced ACCU-TRAC suspension for the EH4500. The new ACCU-TRAC suspension system features independent trailing arms for each front wheel with NEOCON struts, containing energy absorbing gas and compressible NEOCON-ETM 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 NEOCON struts are mounted in a more vertical position which allows a more pure axial loading and reduces the tractive and breaking forces transmitted to the nose cone.

Steering system

Flow-amplified, closed-center hydrostatic power steering system using two double-acting cylinders with pressure unloading type compensated piston pump and a brake actuation/steering system reservoir. Accumulators provide supplementary steering in accordance with J/ISO 5010 and constant steering rate under all conditions. A tilt/telescopic steering wheel with 35° of tilt and 57,15 mm 2.25" telescopic travel is standard.

Hydraulic System

Two Euclid three-stage, double-acting cylinders with cushioning in retraction, containing dual rod seals and urethane energized scrapers, inverted and outboard mounted. Separate reservoir and tandem gear pump connects with a four position electronic pilot controlled hoist valve. Electric controller is mounted to operator's seat.

Frame

Full fabricated box section main rails with section height tapered from rear to front. Wider at the rear to support the loads and narrower at the front to allow for engine accessibility. One piece top and bottom flanges that eliminate cross member tie in joints and provide a large exposed center area for access to major components. Large radii minimize stress concentrations. Welded joints are oriented longitudinally to the principal flow of stress for greater durability and more strength. Frame utilizes 345 N/mm² 50 000 psi yield strength alloy steel that is robotically welded to ensure high quality welds.

Body

Flat chute type, sloped floor, continuously exhaust-heated. Extended canopy protects service deck area. High tensile strength 400 BHN abrasion resistant alloy steel is used in thicknesses of: High strength 690 N/mm² 100 000 psi alloy steel is also used for the canopy side members and floor stiffeners. The body is rubber cushioned on the frame. The Euclid horizontal stiffener design minimizes stress concentrations, by dissipating load shocks over the entire body length. Closely spaced stiffeners provide additional protection by minimizing distances between unsupported areas.