❑ Too low PTO rpm impair 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 is not always
possible. Adjust experimentally the inclination of the mower, PTO rpm, speed and correctness of
knife-mounting. In case of mowing soft meadows the pressure of the cutterbar on the ground
should be reduced by adjusting support springs.
Fig. 16. Shape of the stubble with cutterbar’s inclination 0°, 3° and 5°
5.7.2. Design and and operation of safety breakaway device
In the event of hitting an immovable obstacle one of the safety device flat bars slides out and
disconnects the safety device. After that the mower folds back about 34 degrees (Fig. 18). The operator
has time to shut off the tractor and protect the mower. Safety device spring is adjustable (Fig. 17),
therefore changing the force needed to make safety device work.
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