Sand Injection Verticutting - GRADEN Contour Sand Injection Verticutter/Scarifier Owner's Manual

5.5

Sand Injection Verticutting

1. If you wish to sand inject whilst Verticutting, you will need to fill the
hopper with kiln-dried sand before starting the pass. It is advisable
not to attempt to sand inject in wet weather, as even the smallest
amount of rain will make the dried sand block up the injection tubes,
resulting in uneven and inconsistent sand levels in the grooves.
2. You will need to experiment to get your cutting depth, speed gauge
setting and sand gauge setting in synchronization with each other.
The ideal result is that the grooves are filling to the top with sand, not
being left shallow or heaping up over the top of the groove.
3. Once you have the setting right for your depth of cut, it is a good
idea to note the settings you have for future reference. A set of
guidelines has been drawn up in the table below. They are only
guidelines and you may find in your own circumstances that you
need to adjust the settings for your conditions and preferences.
Cutting Depth Cutting Depth
(mm)
6mm
10mm
13
20
25
30*
35*
* At these deeper settings, you will find that as the machine continues along the pass, the
accumulated debris being removed by the blades actually starts slowing the machine
down, so it will probably be necessary for you to adjust the Speed Limiter during the pass
to increase your forward speed. This will avoid sand heaping up out of the groove due to
the slowing down of the machine.
4. As you engage the blades for your pass, the distributor tray for the
sand will automatically open and the sand will start pouring into the
grooves. You should immediately pull the levers down to the speed
limit you have set to ensure consistent depth.
5. When you reach the end of your pass immediately raise the rotor
housing and the sand will be automatically shut off.
6. Check the sand level in the hopper after every pass and top up as
required. On long passes you may need to top up the sand on the
go, as it is important to never run out of sand.
7. Line up the machine for the next pass and repeat from step 4
onwards until you have completed your job.
Sand Gauge
(inches) Setting
¼"
3/8"
½"
¾"
1"
1 ¼"
1 3/8"
Speed Limiter Setting
2
2
1
1
0
0 Low to Medium*
0 Very Low to Medium*
Very High
High
Medium-High
Medium
Medium-Low