Turkish delight

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  • Earthmovers & Excavators

Onetrak has announced that a Turkish-made Hidromek HMK 600 grader is now on a demo program with a local council in Victoria


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Hidromek entered the Australian construction equipment market by partnering with Onetrak, it was announced earlier this year.

The Hidromek HMK 600 grader has a high-performance Mercedes Benz OM926 environmentally friendly diesel engine provides excellent efficiency and fuel economy even at lower revolutions while generating power at a range from 140kW to 160kW.

Possible tire skidding and abrasions are minimised by generating optimum power in low gears. Variable horsepower increases the performance of the machine by about 12-15 per cent compared to the previous model and performs well in conditions and on all terrains.

All blade and attachment movements are controlled by an advanced electro-hydraulic control system in the HMK 600MG. At the centre of this closed-loop system is a 10-segment, solenoid-controlled, main control valve with load sense feature, supplied by a variable-flow piston pump.

One of the important features of this valve is that the blade and the attachments may be moved in a compatible and predictable way. All movements of blades and attachments are provided through electronically controlled joysticks integrated into the operator’s seat.

The hydraulically driven fan automatically adjusts the speed of rotation depending on the temperature of the refrigerants in the radiator pack. Thus, unnecessary engine power consumption is prevented, contributing to fuel economy and reducing noise emission

The HMK 600MG motor grader has a tight turning circle and high manoeuvrability thanks to its high front wheel tilting and articulation angles. Articulation joint between the front and the rear chassis is supported with a tapered roller bearing.

In order to reduce wear, circular gear is produced from mono-block forged steel and the teeth are hardened by induction hardening. Hydraulic accumulators and flotation systems, standard in the blade lifting and shifting system, absorb shock loads and protect the blade against buried objects that cannot be seen.

Optimum blade angle rolls the cut material over the blade to avoid unnecessary power consumption. The kinematic design of the blade tray allows the blade to be positioned 90 degrees to the right or left for various applications such as slope cutting, trench digging and levelling. The reinforced blade tray is equipped with Teflon wear plates.

The direct-drive, power shift transmission developed for the HMK 600MG offers eight forward and eight reverse gears, and has a planetary gear construction.

The operator can choose between steering or joystick control during operation (gears 1-5), while at high travel speeds (gears 6-8), it is possible to drive comfortably and safely using the steering wheel only. A hexagonal cab design with ROPS/FOPS features provides operator comfort, a wide field of vision and safety.

Anyone keen to see one of these graders in action can do so at the National Works & Engineering Conference at Bendigo Exhibition Centre on September 20 and 21.


Allis Chalmers DD grader

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