Operating manual
Rear disc mowers with central suspension
- with hydro-pneumatic or spring suspension
- 2 8 -
5.3.1.
Gas pressure in the accumulator and in the entire system for each mower model
In the table below are shown the optimal values of pressure in the gas accumulators and in
the entire system for each mower model. The system pressure can be read on the manometer
(Fig. 10).
Tab. 7. Gas pressure in the accumulators and in the entire system for each mower model
Gas pressure in the accumulator
[bar]
System pressure (manometer
reading) [bar]
KT 261 H
50
80
KT 260 H
KT 261 S H
70
110
KT 260 S H
KT 260 W H
75
115
KT 301 H
70
100
KT 300 H
KT 301 S H
75
115
KT 300 S H
KT 300 W H
80
120
KT 341 H
80
120
KT 340 H
5.4.
Preparing the mower for operation – mowers with spring suspensions
The power to the mower should be turned on after the cutting assembly is lowered to
the ground. When at the work site and placing the mower in operating position:
lower the cutting assembly until it touches the ground,
connect the articulated telescopic shaft end onto the PTO of the tractor (if one end was
disconnected) or connect both ends of the shaft,
make sure that the space where the mower will be opened is unobstructed and free of people,
the line enough to release the locking lever Z (Fig. 12) and engaging the external hydraulic
valve on the tractor and the hydraulic hoist of the tractor, position the cutting unit into
a horizontal position,
using the lever of the external hydraulic system of the tractor lower the cutting unit so that as it
gets closer to the ground it slows down,
release the coping tie,
the best recommended tilt angle of the cutterbar to the ground is from 0° to 5°. The tilt is
the result of the shortening or lengthening of the regulated tie G (Fig. 9). Lengthening of the tie
increases mowing height and shortening it decreases it. The same applies to mowers equipped
with a scarifier or rollers,
slowly turn on the power to the mower bringing the cutting discs to the nominal rotational
speed of the PTO of 950 - 1000 rpm. The rpm's should be as low as possible to decrease tractor
fuel use,
put the tractor into correct gear and drive into the grass to be mowed. Level pastures can be
mowed at any speed, while on uneven ones the speed should be reduced to a safe speed.
