Redexim Verti-Drain 2519, User Manual And Parts Book, Page: 21 / 31

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Solid pins
Solid pins break open the hard compressed soil. The pin angle adjustment determines the amount of
heave movement in the ground. The heave movement becomes larger if the angle is adjusted from
90° to 70°. There is minimal heave movement in the ground if the setting is 90°.
If the pins are new, they can damage the lawn – certainly if the roots of the grass are weak. First,
clean the pins manually
or
use the machine for 10 minutes on another rough underground.
If the roots are weak, adjust the working depth in such as manner that the pricking depth is slightly
deeper than the length of the roots. This way the roots have a chance to grow deeper. The next time
prick deeper. Applying this method will prevent damage to the lawn and ensures a healthy set of roots.
We recommend using solid pins with the sharp point in the direction of the front roller (see Figure 12).
You will ten achieve the best possible heave movement in the ground.
Figure 12
On the other hand, we recommend using pins with the sharp point in the direction of the rear of the
machine in case of a lawn with weak roots (see Figure 13).
Figure 13
Always use pins of the same thickness and length. Replace a bent pin immediately. If you don’t do
this, the machine can become unstable. Do not use thicker and/or longer pins than the ones supplied
for this machine (see Chapter 2).
Shorter (worn) pins can be used if superficial pricking is required. Be aware of the fact that the working
depth indicated on the sticker will only be correct if the maximum length of the pin is used.
Oval holes are created if the top layer is weak and the substrate has a hard layer. Use thinner pins or
wait until the wet top layer has become dry. Alternatively, use pins with a sharp point directed to the
rear of the machine (see Figure 13).