HMG is able to perform a range of assembly and pressure testing services for pressure control components as well as hydraulic cylinders, systems and equipment used in mining, oil and gas and other heavy industries.

Quality is the cornerstone to our assembly process.  We adhere to the highest quality standards and regimes in our industry.  Our extensive assembly and testing bench capability enable HMG to reassemble your equipment with either OEM or aftermarket seal and bearing options, to ensure you get maximum service life out of your equipment.

Our pressure testing experts offer you a realm of experience to ensure your heavy machinery and fixed plant equipment is safe, compliant and productive. 

Our state-of-the-art high pressure testing equipment and experienced engineers are able to evaluate various types of hydraulic equipment and systems. These may include hydraulic cylinder assemblies, control valves, rotary joints / actuators, stack tubes / pipes and hoses. All testing can be supported with pressure chart records and fluid cleanliness reports.



  • 8 x assembly and testing benches with capacity up to 16,000mm long.
  • Pressure testing up to 6,000 psi.
  • 2 x hydraulic spanner capability to 276K ft/lbs torque and 450mm across flats.
  • 3 x torque spanners up to 8,000 ft/lbs torque.