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4. STONE TRIP SYSTEMS
4. STONE TRIP SYSTEMS
To protect the plough and tractor, all ploughs are equipped with a stone trip system.
SHEAR BOLT PROTECTION
All (fixed beam) ploughs are protected by a shear bolt in each leg (part no. 4165 91399 00).
NOTE:
Always ensure that the correct grade of bolt is used for replacement. Bolt of an
inferior grade may distort witout shearing, causing the plough body to get out of line.
HYDRAULIC STONE TRIP SYSTEM
The tripping mechanism consists of a trip cylinder for each plough body. The cylinder is
connected to a gas/oil accumulator. The accumulator is precharged with nitrogen gas (N
2
).
The trip cylinders, pressure hoses and the accumulator are pressurized with oil = working
pressure as shown by the pressure gauge.
When ploughing, the pressure of the nitrogen gas acts as a spring inside the accumulator
giving the plough bodies fully automatic and individual tripping and resetting actions.
The design of the trip system allows the plough bodies to move in all directions.
Shear bolt
Stone trip
cylinder
Accumulator
