7 OPERATING THE POLYMAT
It is not allowed to take passengers on the machine.
When the machine has been parked outside, rain water may
have amassed in the air supply hose towards the metering
device.
- Remove the hose from the metering device (fig. 28) and
drain the water, if any.
7.1
PTO speed
The fan should be driven by a PTO speed of either 540 or
1,000 r.p.m.
The decal on the V-belt casing indicates the required PTO
speed (fig. 29), which is also the maximum speed.
- Check if this speed corresponds with the correct PTO speed
for driving the LELYTERRA.
- Adjust the r.p.m. to the required speed at the beginning of a
working pass before lowering the coulters.
- Reduce the r.p.m. at the end of the working pass, but only
after the coulters (as well as the metering wheel) have been
lifted from the ground.
- Keep the PTO speed from falling (temporarily) during the
sowing operation.
If the PTO speed is too low, the accuracy of seed distribution
may be affected whilst the hoses tend to get clogged,
especially when major outputs and/or large-sized seeds are
applied.
Too high a rotor speed may cause damage to the fan.
7.2
Reading off the hectare counter
The hectare counter (fig. 30) indicates the surface worked in
units of 10 m² (=1/1000 ha). The white digits show the
completed hectares.
So: the value 00100 on the counter corresponds with 0,1
hectare.
The zero position of the hectare counter can be set with the
knob on the RH side.
51
28
29
30
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