Pump and valve overhauls

Your partner for hydraulic systems

Regular maintenance of your hydraulic components is crucial to avoid unexpected failures. Our experienced team of technicians will support you in finding the best solution for your specific requirements, be it a new purchase or a targeted overhaul.

Martin Müller

Martin Müller

Head of Hydraulic Technology

Alain Wicki

Alain Wicki

On-site service manager

Overhaul of a hydraulic pump

When overhauling a hydraulic pump, the pump is first dismantled into its individual parts and thoroughly cleaned. Each component, such as bearings, drive set, seals and valves, is checked for wear and damage. Defective or worn parts are replaced. The components are then adjusted and the hydraulic pump reassembled. Finally, the pump is tested under real conditions to ensure full functionality and guarantee optimum performance.

Pump test bench

Our unique pump test bench offers you the flexibility to comprehensively test pumps regardless of the manufacturer. It allows you to program and test a wide range of scenarios, making us an exclusive provider in this field. This test bench has been specially developed to guarantee maximum precision, flexibility and performance.

Technical data at a glance:

  • Maximum electrical power: 122 kW

  • Maximum speed: 2500 1/min

  • Maximum torque: 1000 Nm

  • Maximum delivery volume: 350 l/min

  • Maximum test pressure: 500 bar

Power units, pumps and valves

We are your specialist for hydraulic power units, pumps and valves. From the reassembly of entire power units and the drawing of precise electrical diagrams to the professional overhaul of pumps and valves. Through thorough functional tests and quality inspections, we ensure that every component works reliably and efficiently.

Gain an insight into our pump department

Hydraulic block

Special hydraulic block with lowering brake valve. You can find out more about this exciting project with pictures here.

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Pool cover ready for summer!

We were able to carry out a complete overhaul of the hydraulic components at the Kriens public swimming pool.

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Hydraulic power unit retrofit

The hydraulic unit was equipped with outdated logic valves and was controlled hydraulically. Our team carried out a retrofit. The machine now complies with current standards again and can continue to be used for wire pointing in the watch industry.

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Cider press from Ramseier

The valve block and pump block of this historic cider press have been overhauled.

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Bosch/Rexroth pump overhaul

In our valves/aggregates/pumps department, we overhaul and repair all types of pumps. In this case, it was a Bosch/Rexroth double pump.

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Hydraulic blockPool cover ready for summer!Hydraulic power unit retrofitCider press from RamseierBosch/Rexroth pump overhaul

Frequently asked questions about hydraulic pumps

How does a hydraulic pump work?

A hydraulic pump converts mechanical energy into hydraulic pressure and volume flow by drawing in fluid and pumping it into the system under pressure. This pressure generates the force required to operate various hydraulic applications

How much pressure does a hydraulic pump have?

The pressure of a hydraulic pump varies depending on the design and application. As a rule, hydraulic pumps can generate pressures of up to 700 bar, although specialized pumps can also deliver even higher pressures.

How do you test a hydraulic pump?

To test a hydraulic pump, it is operated in a test bench while various parameters such as pressure, delivery volume and temperature are monitored. The pump is checked for its performance, tightness and possible noise to ensure that it functions correctly under the intended operating conditions.

Causes of power loss in a hydraulic pump?

A loss of performance in a hydraulic pump can be caused by worn components such as pistons or seals, which leads to a drop in pressure. Internal or external leaks in the system also reduce efficiency. In addition, contamination in the hydraulic oil can impair the flow and reduce the performance of the pump.

What happens if the feed pressure is too low?

If the feed pressure in a hydraulic system is too low, cavitation can occur, causing vapor bubbles to form in the hydraulic oil and causing damage to the pump when it collapses. This leads to increased wear, noise development and a possible loss of performance. In addition, the pump cannot be adequately supplied with oil, which impairs lubrication and reduces the service life of the components.