25
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 decal 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 top dressing 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.
16.3.2 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.
16.4.
OPTIONS, NEEDLE TINES.
With the needle tines, we can create many holes that are hardly noticeable. Two versions are
available, see also fig.14.
16.4.1. (STANDARD) NEEDLE TINES.
A special adapter is required to mount 8 needle tine per tine head from the machine, see fig. 14, left.
The adapter blocks are bolted against the bottom of the tine holder with two bolts D. The mark (
drilled centre points) should face to the centre of the machine.
The adapter can take solid needle tines of hollow needle tines. The 8 tines per adapter block are
tightened with a bolt. Since we have two rows, the bolts should be mounted from the front and back,
at the longest threaded hole part. The maximum torque on these bolts should be 40 Nm ( 30 lbs.ft.)
We advise a machine setting of 90 degrees, so we create nice straight holes.
The height setting of the machine needs some adjustment to compensate for the adapter block
If the needle tines rip the turf, take some tines out.
