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OPERATOR'S MANUAL
REAR DISC MOWER
XT
5.7.
Gas pressure in the accumulator and in the entire system
In the table below are shown the optimal values of pressure in the gas accumulators and in
the entire system, depending on the mower model. The system pressure can be read on the manometer.
Value for gas in accumulator is factory-set.
Tab. 6.
Gas pressure in the accumulator and in the entire system should be set, depending on the mower model
Mower type
Gas pressure in the
accumulator
[psi / bar]
Recommended pressure in the system
pressure (manometer reading)
[psi / bar]
XT 390
580 / 40
725-942 / 50-65
6.
OPERATING THE MOWER
Dear
User,
If this is your first experience with a disc mower (previously you used a 2-drum mower) then you may need
some obvious information
:
1. The greatest asset of disc mowers is their lower, about 20 %, power requirements, shorter time of
inertia, and the possibility of constructing mowers of greater width.
2. A certain disadvantage is the not as pretty, wavy stubble (after gathering) especially when mowing
fallen grasses. Straight grasses can be mowed with the mower in the horizontal position and then
the stubble will be even but it will not be as attractive as with the 2-drum or 4-drum mower, because
the cutting blades cut in a horizontal position which creates an air gust which bends the blades
which stand up after passing and create the impression of inaccurate mowing.
Each mower should be given tolerance for leaving some slight piece of uncut grass at knives which
cut grass forward. Such occurrence is normal. For disc mowers it is both theoretically and physically
impossible to achieve such attractive looking stubble as for double drum mowers for knives work
either horizontally or under small angle of up to 3
°
in relation to the ground, and in double and
quadruple drum
mowers angled over the ground (even 23°)
.
Despite these "disadvantages" farmers all around the world are more and more convinced by disc
mowers while modern technologies allow manufacturing very solid mowers (even up to 1000%).
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.
Essential information concerning mowing
Optimum work parameters
1.
Inclination towards the front
0÷
3 degrees which stands for 1.97
″
-2.75
″ (
5-7cm) of mowing height.
2.
Operation speed
≥
6mph (10 km/h).
3.
Keep the constant PTO rpm =
950÷1000
rpm. PTO rpm > 1000 may cause stripes of uncut grass
between the disc.
High and inclined grass
1.
Heighten the cutterbar’s inclination to
–
H = about 1.97
″
(5cm).
2. O
peration without cutterbar’s inclination may cause winding of grass on the forming drums
.
3. Speed up to
V ≥
7mph (12 km/ h) (the faster
–
the better)
