Frequently asked questions (FAQ)

How can we help you? Here you will find answers to the most frequently asked questions from our customers about hydraulic, pneumatic and mobile electronics systems. If the information you are looking for is not available, please do not hesitate to contact us. A member of our team will be happy to answer you.

Several measuring devices can prevent damage to a hydraulic system:

  • a filter maintenance indicator
  • a water content measuring device
  • a particle counter

See our article on hydraulic system contamination to learn more.  

For manual filling, make sure the oil gallon cap is clean and use a dry funnel (free of water or other fluids) and free of dust or particles. The use of a filter pump to transfer oil from the gallon to the tank is a useful method of preventing contamination and protecting the hydraulic system.

See our article on hydraulic system contamination to learn more

Tests are used to determine whether or not contaminants are present. This is most often done by analyzing the viscosity, water content, or solid content.

See our article on hydraulic system contamination to learn more.  

Equipments which allow a depollution of the fluid in a hydraulic circuit.

  • Mobile filtration units can be connected to the circuit, allowing a depollution of the fluid in the circuit
  • The installation of fluid purifiers is a more complete system to clean up a fluid contaminated by particles, water or gases.
  • In some major cases, a complete emptying followed by a cleaning is necessary.

See our article on hydraulic system contamination to learn more.  

There is a multitude of hydraulic fittings. They are differentiated according to several criteria:

  • Male or female connections, 
  • Straight or angled fittings, 
  • Rigid or swivel fittings.

Hydraulic fittings are available in several sizes and depending on the needs, the fittings must be selected according to the type of hydraulic hose (braided, spiral, high pressure, thermoplastic or others).

To learn more, check out the types of fittings available from HP Hydraulique.

Bosch Rexroth designs and manufactures a wide variety of high quality hydraulic components, available for multiple technologies:

  • Assembly technology, Electric drives and controls
  • Gear technology
  • Linear motion technology
  • Industrial hydraulics
  • Mobile hydraulics
  • Welding technology
  • Tightening technology

H.P. Hydraulique is a certified Bosch Rexroth authorized distributor for the mobile and industrial hydraulics product line. We are therefore able to meet your needs for Bosch Rexroth components.

An open circuit is when the fluid from the pump passes through the directional valves before returning to the reservoir. Thus, the pump provides a continuous flow to the hydraulic system. In addition, an open circuit is a unidirectional circuit, which means that the fluid can only flow in one direction.

On the other hand, in a closed-circuit hydraulic system, the fluid from the piston pump flows directly to a motor, back to the pump without passing through the reservoir. The particularity of this type of circuit is its bidirectional operation.

For more explanation, consult our article on the differences between an open and closed hydraulic system.