‘Standard’ Brake Cylinders

A displacement-type single-acting hydraulic cylinder used for agricultural trailer brakes is a simple hydraulic ram that activates the brakes on the trailer when hydraulic pressure from the towing vehicle (tractor) is applied. Single-acting means it only pushes (activates the brake) when fluid pressure is sent in. When the pressure is released, the brake lets go on its own by the brake mechanism returning to rest.

In farm use, you don’t want to be constantly fixing trailer brakes. So these cylinders are designed to:

  • Have few moving parts
  • Be well-sealed to keep out dust, water, and mud
  • Use corrosion-resistant materials (especially important for muddy or wet fields)
  • Be fully enclosed using self-lubricating parts

Our Standard Hydraulic Brake Ram sizes are as follows:

Order Ref No. Part Description Rod Dia Body Dia Body Length Stroke (mm) Closed/Open Centres Thrust @ 100 Bar
BR20 20MM BRAKE RAM 20mm 38.10 149mm 76 190 / 266 3142 N
BR25 25MM BRAKE RAM 25mm 41.28 149mm 76 190 / 266 4909 N
BR30 30MM BRAKE RAM 30mm 50.00 185mm 76 230 / 306 7070 N
BR35 35MM BRAKE RAM 35mm 53.98 185mm 76 230 / 306 9622 N

This design means the cylinder can last for years with little or no maintenance, assuming it’s used properly. Agricultural trailers only need braking force in one direction (when stopping), so a simple push-type cylinder works great. These cylinders are compact, reliable, and affordable. They hook directly to the tractor’s hydraulic system – no need for air brakes or complex systems.

For trailer brakes, a displacement-type single-acting hydraulic cylinder is a low-maintenance, push-only brake actuator that’s perfect for farm trailers. It uses tractor hydraulics to push and apply the brakes, and automatically releases when pressure stops—simple, rugged, and reliable.

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