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16.1 OPTIONS, PINS
Pins are essential for the correct operation of the machine. There are various pins available
for this machine; see the parts page for a complete overview. In general, the pins can be
divided into two categories: solid and hollow pins. We advise you to use only original pins
because they are completely adapted to the machine.
The pin holders have 3 x 12 mm (½”) and 2 x 18 mm (3/4”) holes for securing pins.
Locking bolt A may be tightened to 40 Nm (29.5 lbf.ft.). (Fig. 18)
If the pins come out of the pin holders, grind a flat area on the mounting end of the pins.
16.1.1 SOLID PINS
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Solid pins break open compacted soil. The pin angle adjustment (see chapter 6.0)
determines the quantity of draught movement in the ground. When the angle is adjusted
from 90 to 75 degrees, the draught movement increases. With a 90 degree adjustment,
there is almost no pin movement created in the ground.
When the pins are new, they may damage the turf, in particular when the root system is
weak. First clean the pins manually or use the machine first for 10 minutes on another rough
ground surface.
When the root system is weak, try to adjust the working depth such that the pricking depth is
slightly deeper than the length of the roots. This gives the roots a chance to grow deeper.
Prick deeper the next time. By using this method, you can prevent damage to the turf and
ensure a healthy root system.
We advise you to use the solid pins with the sharp point toward the front roller. This
ensures the best pin movement into the ground. On the other hand, for weak turf, we
advise you to use the pins with the sharp point toward the rear of the machine.
Fig. 19
