'Standard' Brake Cylinders
'Slotted Clevis' Brake Cylinders
Standard 'Spring Return' Brake Cylinders
Slotted 'Spring Return' Brake Cylinders
Standard 'Square' Actuator Assemblies
Standard 'Round' Actuator Assemblies
Air to Hydraulic 'Converter Kits'
Dual Supply' Pneumatic/Hydraulic Actuators
'Standard' Pneumatic Service Brake Chambers
Be-spoke hydraulic cylinders / “rams”
Spares & Accessories for Standard Brake kits
‘Weld On’ Axle Brackets
Slotted ‘Spring Return’ Brake Cylinders
A displacement-type, single-acting hydraulic cylinder designed specifically for mechanical parking brake applications on agricultural trailers. It incorporates an internal compression spring that automatically returns the piston to the ‘brakes off’ position when hydraulic pressure is released.
This cylinder is supplied with a slotted clevis yoke, allowing free axial and angular movement, accommodating linkage misalignment and trailer flex during operation.
Slotted Clevis ‘Spring Return’ Brake Ram sizes are as follows:
| Order Ref No. | Part Description | Rod Dia | Body Dia (mm) | Body Length | Stroke (mm) | Closed / Open Ctrs | Thrust @100 Bar |
|---|---|---|---|---|---|---|---|
| SRBR20SL | 20MM S/RETURN C/W SLOTTED CLEVIS | 20mm | 38.10 | 200 | 73 | 231 / 304 | 3142 N |
| SRBR25SL | 25MM S/RETURN C/W SLOTTED CLEVIS | 25mm | 41.28 | 198 | 75 | 239 / 314 | 4909 N |
| SRBR30SL | 30MM S/RETURN C/W SLOTTED CLEVIS | 30mm | 50.00 | 210 | 75 | 250 / 325 | 7070 N |
| SRBR35SL | 35MM S/RETURN C/W SLOTTED CLEVIS | 35mm | 53.98 | 221 | 75 | 260 / 335 | 9622 N |
Key Features
- Type: Displacement, single-acting hydraulic cylinder
- Return Mechanism: Internal compression spring
- Default Position: Brakes OFF (spring extends piston when pressure is absent)
- Mounting: Includes slotted clevis yoke for flexible linkage connection
- Application: Mechanical parking brake systems on agricultural trailers
Benefits
- Fail-safe return to brakes-off position when pressure is removed
- Durable construction for off-road and harsh environments
- Simple integration with mechanical drum brake linkages
- Compensates for alignment variations via slotted clevis design
Typical Use Case
- Mounted on the trailer chassis or axle, this cylinder connects to a mechanical brake linkage. When hydraulic pressure from the tractor is applied, the cylinder extends to apply the brakes. When pressure is released, the internal spring returns the piston, disengaging the brakes.