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OPERATOR’S MANUAL
REAR DISC MOWER
KDT
WARNING!
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.
5.7.
Operation (mowing)
WARNING:
The operator must be seated in the tractor’s driver’s seat when the machine is
operating since only from that position is he able safely and properly operate the
mower. Before he leaves the
driver’s seat, the operator must stop the engine,
apply the parking brake and turn off the tractor engine.
Always use appropriate protective equipment (safety footwear, gloves, ear protection and dust mask).
Before using the machine, make sure that all the safety devices are in their correct positions and in a
good condition. These safety devices must be immediately replaced if they are faulty or damaged.
In particular, the protective cover must be checked regularly. It must be immediately replaced if it is
missing or damaged in any way.
IMPORTANT:
If a disc mower is your first experience (you have mowed with 2-drum mower), you need
a piece of essential information:
1.
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 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 thro
ugh 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.
Keep the constant PTO rpm = 470-520 rpm. PTO rpm less than 540 may cause stripes of uncut grass
between the disc.
