Essential Information Concerning Mowing - SaMASZ KDT 180 Operator's Manual

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 mowers,
because the knives work horizontally to the ground and inclined grass bends because of wind
blasts. After the grass is mowed, it stands up, which makes an impression of inaccurate mowing.
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 an opportunity to manufacture very durable mowers.
3. The most even stubble with very low grasses is obtained with disc mowers when half of
the discs rotate to the right and half to the left. A disadvantage of this system is a narrow and
thick windrow which needs to be spread out.

5.7.1. Essential information concerning mowing

Optimum work parameters
1. Inclination towards the front 0-5 degrees which equates to 1.8" - 2.8" of mowing height.
2. Operation speed around 6 mph or more, if the conditions allow.
3. PTO rpm = 470-520 rpm. PTO rpm less than 540 may cause stripes of uncut grass between the
disc.
High and inclined grass
1. Heighten the cutterbar's inclination to H = about 1.8".
2. If there is no inclination the grass will be wedged on the forming drums.
3. Speed can be more than 8 mph (the faster – the better).
4. Do not turn in the mowed grass.
Optimum inclination of the cutterbar towards the ground is between 0° to 5°. If the inclination
exceeds 5°, there might be a slight unevenness of mowed grass. It impairs slightly the quality of
mowing and has an influence on the mower's operation. When the cutterbar is pulled in the other
direction, it significantly impairs the quality of mowing and in some cases the mower stops
mowing. Besides, it may lead to premature wear or even damage of the slides and cutterbar.
When high grass prevails, first and second cut should be mowed at height level 2.4" - 2.8", but
when the grass grows low it should be mowed at 2". The last cut should be mowed a little bit
higher, 2.8" - 3" above the ground.
Too high a PTO rpm whirls the air, which may cause inclination of the grass in front of discs,
which impairs the quality of mowing.
Too low a PTO rpm impairs the quality of mowing and in some cases the mower stops mowing
(too low linear velocity of the knife).
In contrast with 2-drum mowers, straight mounting of the mower and full speed are not always
possible. Adjust inclination of the mower, PTO rpm, speed and correctness of knife-mounting to
get the best results.
In case of mowing soft meadows, the pressure of the cutterbar on the ground should be reduced
by adjusting support springs.
Always check to make sure that the ground speed suits the conditions or work and that it does
not create a potential source of danger
Do not take sharp turns anytime and do not operate in reverse.
Operator's manual
- 23 -
Rear disc mowers
KDT