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Raise crackerboard to highest position for adjustment of tine angle.
The tine angle selected depends on the nature of the job. If they are set ag-
gressively while the depth is set for the upper soil layer, maximum vibration
will be created for fine-crushing of lumps and an optimum smoothing effect.
If the tine setting is more horizontal, it will allow them to avoid obstacles. It
will also mean that the tips can move more in the vertical plane, producing an
increased compaction and smoothing effect.
The crackerboard is a flexible unit with a range of applications. When the
depth is set to 5 cm, the vibrating effect of the tines will crush clumps.
A deeper setting will increase the
levelling effect to that of a levelling
board, as a small bank of soil builds
up in front of the tines.
It is not designed to act as a dozer blade, but to break the soil down. As each
tine can move individually and thus yield to localised pressure, the cracker-
board is easy to use and requires little adjustment compared to a levelling
board.
The crackerboard sections can run at different depths, which means it may be
necessary to zero the board by raising it to full height and then proceed to
activate the outlet (marked:. green). The oil is thereby circulated in the se-
ries-connected cylinders and any air in the oil is purged.
Adjusting harrowing depth
The harrow section (A) is parallel
mounted and is adjusted vertically
up and down by the double-acting
coupling (marked: white valve block
no. 3).
.
Rollomaximum XL
A
Page 21
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