Mechanical or hydraulic overload protection
Mechanical with shear bolt overload protection
Shear bolts are the tried and tested standard solution. Under load, the shear bolt snaps off at the predetermined breaking point and the plough body gives way to the obstacle by swivelling upwards. Raise the plough, insert a new shear bolt and off you go. The high release forces of the shear bolt also allow operation in heavy soils and in hard going.
The advantages:
- Double action shear bolts
- Hardened flange plates
- High-quality shear bolts; in 10.9 quality
Semi-automatic as an alternative for the Cayros M
With the semi-automatic overload protection, the plough body swings out of the way by overcoming the strong pressure exerted by the two coil springs. For the Cayros M, this system is an alternative to using shear bolts or the hydraulic overload protection when the ground is not excessively stony.
The advantages:
- Low additional weight over and above the shear bolt overload protection
- Adjustable release force
Hydraulic overload protection: the Cayros S
The hydraulic overload protection is basically a hydraulic cylinder with a directly connected, nitrogen-filled hydraulic accumulator on each pair of plough bodies. When triggered, the plough body pushes a piston into the accumulator via the hydraulic cylinder. The gas is compressed and automatically returns the body to its initial position after passing the obstacle. Hydraulic overload protection is available for the smallest ploughs right through to the high horsepower models.
The advantages:
- Simple adaptation of the release force
- Smooth and material protecting operation
- Exchangeable ball joints and sockets
- Additional shear bolt as standard
- The trip forces decrease as the lift height of the released plough body increases
The hydraulic overload protection is available in 2 versions:
Option 1: Central hydraulic accumulator on the hydraulic ram
In its simplest version, the hydraulic accumulator is directly combined with the hydraulic cylinder forming a compact unit.
The advantages:
- The plough bodies release completely independently of each other
- The plough bodies can be pretensioned differently
- No hydraulic hoses or pipes on the plough beam
Option 2: Hydraulic accumulator with inter-connected pipework
Via the connection of the individual components, the release force can be also adjusted centrally across all the bodies. An isolator valve on each hydraulic accumulator means that the setting on each plough body can, from choice, be also set independently to different pressures.
The advantages:
- The adjustment of the release force is carried out across all plough bodies in just one step (even whilst on the move)
- Similar pipe cross-sectional area means that each furrow has only a slight influence on each other
