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Hydraulic stone breakaway
Fig. 8
Mechanical stone breakaway
Shearbolt
Fig. 9
Ñ
Ñ
Power requirements (HP/KW)
Working width
260 cm.
Power
Power requirements depend on type of soil, terrain, working depth and speed
NSH-models are designed with hydraulic stone breakaway – an
advantage when driving under very stony soil conditions. When
hitting a buried stone the tine concerned will breakaway so that the
stone can pass through the cultivator. When the stone has passed the
tine will automatically swing back to working position with no stops
necessary.
Under normal conditions a system pressure of 60 bar is
recommended, however, in extreme cases if the soil is very hard the
system pressure can be increased to max. 100 bar.
System pressure above 100 bar is NOT recommended as a too heavy
filling of the accumulator will be the result and consequently the
tines will not breakaway sufficiently.
The standard model D is designed with mechanical stone breakaway
in the form of shearbolts, but can easily be converted to hydraulic
stone breakaway (NSH) (see "Replacement and Repairs").
Tine overload protection by means of shearbolts is used in fields
with only few buried stones. When hitting a buried stone the bolt
will shear off and the tine break back. In this way the stone can pass
through the cultivator without overloading the implement or the
tractor.
It is necessary to stop the tractor and change the shearbolt. Remove
the broken shearbolt and tip the tine back into place and fit a new
bolt 16x80mm.
Inclined discs have been secured with a 10x70mm shearbolts. The bolt shear
off when overloaded and stones can pass.
Never use fingers to remove broken shearbolts but use a screwdriver or the
like.
When changing a shearbolt Dinco must be lowered and rest on the foundation.
If the implement is lifted a strong support of the main frame must be provided.
Dinco
300 cm.
90/66
100/74
380 cm.
470 cm.
120/88
155/114
560 cm.
190/140
Page 15
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