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We advise to use the solid tines with the sharp point facing to the front roller. This will create the best
tine action in the ground. However with a weak turf, it is worth using the tines with the sharp edge
facing the rear roller.
The rear roller may not be locked.
Use always tines with the same length and size. Replace a bent tine immediately. When this is not
done, the machine can be unstable. Don’t use any thicker/ longer tines as what is offered by us.
Shorter (worn) tines can be used in case shallower penetration is required. Note that the depth reading
on the decall is only correct when using the full maximum length tine
If oval holes are created, it means that we have a weak top layer and a hard pan underneath. Use
thinner tines or wait till the (wet) top layer has dried.
If topdressing needs to be applied, spread it first before using the Verti-Drain.
If the ground is hard to penetrate, irrigate first, use smaller diameter shorter tines or adjust working
depth. If not done, the machine will be hurt in the end.
With heavy tines, the tine holders may start to float. Reduce the PTO speed at that moment
immediately, because damage may occur when the tines hit the rear roller.
16.1.2 HOLLOW TINES.
With hollow tines, the soil can be exchanged. Different sizes are available, see the spare part manual.
The side outlet should face to the rear of the machine.
It is important that the tine angle is set a 90 degrees with hollow coring tines. The tine motion in the
ground is minimum and we create a nice clean hole. If the tine is still moving in the ground, the hollow
tine may break in the end.
If top dressing needs to be applied, use the Verti-Drain first, remove the cores and start spreading sand.
If a lot of dirt is created during hollow coring, reduce your rpm’s or irrigate first. The dirt may wear
your machine
When the turf is damaged, use the solid tines first to establish a healthy root system first or adjust the
working depth.
The rear roller may be lifted and locked with the lock pin, so it doesn’t squash the cores. However
when the machine is a bit unstable and the rear roller starts to vibrate, it is better to keep the rear roller
on the ground.
If the hollow tines block, it means that the ground is (very) compacted and solid tines need to be used
first to break the ground. Irrigation may help as well, as adjusting the working depth.
16.1.3 AUXILIARY SPRING KIT
In some cases, people want more pre tension on the draw rod springs.
A complete spring kit per draw rod has the part number 211.752.004.. For a 7516 (H) you need 6 kits,
for the 7521 (H) 8 and for the 7526 (H) 10 kits.
Mounting instructions
The spring 1 should be exactly above the draw rod assembly 2, see Fig. This can be achieved by the
angle A of both clamps 3 and 4.
Start with assembling clamp 3 at a distance of 48 mm ( 2”) from the draw rod head end. This is critical,
otherwise the tineholder can’t be turned up anymore.
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