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If the root system is weak, don’t try to break the soil much deeper than the root system. Adjust the
working depth till the penetration is about 75 mm (3”) more than the root system depth. This allows
the roots to grow deeper. Next time penetrate deeper. Using this method will safe you from
damaging the turf and will establish a healthy root system.
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. The machine doesn’t need
to be adjusted that much at that time. 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 need to be used first
to break the ground. Irrigation may help as well, as adjusting the working depth.
16.1.3 OPTIONS, CORE COLLECTOR
An easy mountable core collector is available for the 7516. The part number is 9500080.
ASSEMBLING INSTUCTIONS ( see Fig 12):
- Preparation of the Verti-Drain:
- Fit eye bolts 24 to the main frame 26
- Assemble bushes 15 with the new longer bolts 18 to the rear roller supports.
@ These bushes can stay on the machine all the time
@ Use washers 16 to align the bushes to the rear roller scraper support.
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