Height & Load Adjustable Hydraulic Suspension Cylinders

Hydraulic Adjustable Suspension Cylinders

We first developed the Height and Load Adjustable Hydraulic Suspension Cylinder in order to, adjust the height of a trailer to suit the vehicle towing it. We looked at various ways of adjusting the trailer towing height but decided the hydraulic route was best suited for our needs. Therefore, we designed a suspension system that fitted inside a double acting hydraulic cylinder. Once happy and confident with our design, we produced two and started testing.

When making the axle units for the suspension cylinders, we came up with the idea of making the chassis go down to the ground, so piped each side individually and decided to add a hydraulic adjustable drawbar to create a low loading trailer.

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 We put six units into two frames, piped the first two cylinders in each frame together. Then pipe the third cylinders in each frame together to create a tri-axle unit with one lifting axle.


A customer asked if we could find a way of stabilising a sprung grain trailer so it could be used on greater side slopes without tipping.  After much research, we piped two cylinders together to develop a system that moves up and down together, and how parallel the cylinders stay can be adjusted by the pressure put in when fitted to the grain trailer. we have developed a hydraulic stabilisation system

Development is a major part of our business, if you would like to discuss any ideas or projects


Unit has done 300,000 stroke to date and still going strong

These products are based on a standard double acting hydraulic cylinder but have a compression section added. A compression section can be added into any length or diameter cylinder. The 'Hydrapowered' Adjustable Suspension Cylinders are fully flexible because of the way the compression section is loaded.


The compression section is behind the piston head and therefore can move along the cylinder in either direction as pressure is applied through the revelent ports at each end, this allows the compression section to be used at any point in the cylinder. The force of the compression section is applied through the fixing points.


By loading the compression section of the cylinder at different points and/or using cylinders of various lengths and diameters, the pressure in the compression section can be reduced or increased.


Using the specific pressure measurements for a particular cylinder the amount of force exerted from the compression section can be calculated.


For example:

A 70mm diameter cylinder (600mm stroke) with the compression section compressed to 10mm and loaded to its maximum would give 20.5kN of force.

When loaded to 50% of its maximum and compressed to 10mm the compression section would give a force of 8.4kN.

When the compression section is compressed to 5mm and loaded to its maximum it would give a force of 41.1kN, but when loaded to 50% of it maximum it would give a force of 20.7kN.


We have piped the cylinders up in various way for different applications and have had some interesting results.