Operator’s manual
Front disc mowers
KDF
- 23 -
CAUTION:
Switching the mower from operating position to transport position and vice
versa could only take place on even and stable ground. Prior to approaching
works make sure whether there are no unauthorized persons exposed to
getting crushed.
5.7.
Preparing the mower for work
slowly engage the PTO clutch and wait until the cutting unit reaches its rated speed,
engage tractor gear and drive slowly into the grass-field. If thge conditions are favourable,
the 3
rd
gear can be turned on. If the conditions are bad, turn off the 1
st
gear.
Support chain holds up tractor’s hydraulic cylinders and maintains mower’s level.
CAUTION:
DO NOT pull the cutterbar in other way (towards the tractor), because it will
lead to cutterbar’s premature wear or even its damage.
CAUTION:
Improperly relieved cutting unit of the mower will cause increase of
cutterbar pressure on the ground which will lead to faster wear of sliding
skids, overload of cutterbar, higher fuel consumption, damage to the stubble
and contamination of the fodder.
5.8.
Operation
Dear operator,
If the disc mower is your first experience (you have mowed with 2-drum mower) you need
a piece of essential information:
1. The main advantage of disc mowers is their small power demand – 20 % less tractor power,
small moment of inertia and possibility to manufacture mowers with large working width.
2. There is however a certain disadvantage - creased stubble, especially when it comes to lying
grass. Straight grass may be mowed with horizontal adjustment of the mower and then
the stubble will be even but it will not look as attractive as with 2-drum or 4-drum mower,
because the knives work horizontally to the ground and inclined grass bends because of wind
blasts. After the grass is mowed it gets up, which makes an impression of inaccurate mowing
(see Fig. 15).
Every mower may leave stripes of uncut grass when it comes to the knives which cut the grass
towards the grass direction. It is a normal phenomenon. Practically, it is not possible to achieve
such attractive stubble as in 2-drum mowers, because the knives work horizontally or at an angle
of up to 8° to the ground, and when it comes to 2-drum and 4-drum mowers slantwise through
the ground (even 23°).
Despite these ‘disadvantages’, disc mowers are ‘winning farmers’ trust’ and modern technologies
give the opporunity to manufacture very durable mowers (even up to 1000 %).
5.8.1.
Essential information concerning mowing
Optimum work parameters:
1.
Inclination towards the front 0÷5 degrees which stands for 4.5÷7 cm of mowing height.
2.
Operation speed
≥
10 km/h.
3.
PTO rpm = 900÷1000 rpm. PTO rpm > 1000 may cause stripes of uncut grass between the disc.