Harper ATM 72 LC, Руководство оператора

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PARAMETERS FOR GRASS CUTTING WITH THE ATM 72LC:
The principal objective when mowing is to achieve the highest quality cut with the greatest
efficiency. However, there are many environmental conditions that work to diminish the
capacity of the machine to achieve this goal. The variables include: type, density, length
and moisture content of the vegetation. When determining the proper way to cut grass,
each of these variables must be given serious consideration.
The operator is able to make adjustments that will increase the cutting efficiency of the
machine. These adjustments include: deck height, ground speed and blade sharpness.
Blades should be sharpened on a regular basis to improve cut and reduce resistance. Deck
height and ground speed should be determined based on environmental conditions.
The highest quality of cut can usually be achieved by removing only 1/3 of the plant when
the initial length is 9” or less. Mowing taller or extremely dense grass while using a low deck
height setting will cause material to build up under the deck faster than it can be ejected.
This build up can create enough resistance to slow the tip speed of the blade, causing a
drastic reduction in cut quality. The configuration of the hydraulic system that powers the
deck motors will exhibit stress in the left deck motor first. Deck height or mower speed
should be adjusted when the right deck begins to out perform the left deck. This may occur
without noticeable change in engine speed.
Certain situations may require two cuts with different deck heights and or a slower ground
speed to achieve the desired cut quality. When a better looking finish cut is desired, making
two passes in tall grass can dramatically improve the quality of the cut. The deck should be
raised on the first cut to near maximum height to allow grass to escape freely. The deck
should then be lowered to the desired height to make the final cut.
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