Parker’s new hydraulic motors boost cooling efficiency for on- and off-highway equipment

The new M5A hydraulic motors are designed to offer high levels of engine efficiency by enabling the speed of cooling fans to be matched precisely to the operating load of each vehicle; this can significantly reduce energy consumption and emissions, while helping to improve fuel economy and minimise the wear on moving parts, to extend service intervals.

Each motor is manufactured from a tough cast iron housing and incorporates heavy duty components throughout, including specially developed bearings, resulting in a robust system capable of handling sustained heavy loads. For example, the bearing and motor shaft assembly is capable of withstanding high gyroscopic forces, making the system ideal for use in forestry and construction equipment.

Similarly, in order to meet the increasingly rigorous noise and emission standards required in the Commercial Vehicle sector, the new motors use proven radial vane technology to enable them to operate at particularly low noise levels, even under full load. Indeed, vane motors are among the quietest hydraulic technologies available on the market, as well as being the most energy efficient in medium pressure installations.

In addition, the M5A motors feature integrated proportional pressure relief valves and sensor mechanisms. These provide extended functionality, for example anti-cavitation and dedicated speed control, without the need for auxiliary equipment. For applications where cooling radiators are prone to clogging with dirt or debris, a reverse valve option is also available, which enables radiators to be cleaned simply by reversing the air flow from the pump and fan assembly. Again, the reverse valve is integrated within the motor housing, minimising system size still further.

The new M5A hydraulic motors have been developed for use with original equipment from all major vehicle manufacturers, and are supplied in two industry standards sizes: SAE A and SAE B. The new hydraulic motors are also backed by Parker Hannifin’s global network of manufacturing, sales and customer support centres.