breviglieri MEKFARMER 150, Operating And Maintenance Manual

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4.6 WORK DEPTH ADJUSTMENT
Harrow work depth adjustment can be made in various ways:
By means of side pins (standard - Fig. 1. 12 ). This solution not only permits depth adjustment, but also having a floating rear
roller (ideal when there are stones).
With screw jacks (Fig.
2. 13 ). This solution requires two screw jacks at the ends of the machine and adjustable by means of a
graduated rod. When the roller is raised, working depth increases. When the roller is lowered, working depth decreases.
With hydraulic cylinders (Fig.
3. 14 ). This solution for adjusting work depth with hydraulic control cylinders can be implemented
from the driving seat, by means of the hydraulic mechanism which controls the two hydraulic cylinders that regulate the rear
rollers (
8 Fig. 1 ) thus determining the work depth. Both hydraulic cylinders feature stop valves.
4.7 IN WORK
Begin work with the PTO at full rate. Gradually dig the implement into the ground. Do not depress the accelerator pedal too much
with the PTO engaged. To break up the soil to the required degree, you must consider several factors, i.e.:
the nature of the soil (medium consistency, sandy, clayey, etc.)
▪
the work depth
▪
the ground speed of the tractor
▪
optimum machine adjustment
▪
Soil crumbling is obtained at a low tractor ground speed, with the rear bar lowered and the blades spinning at 300 rpm. Besides
holding back the clods already broken up by the blades, the rear bar also obtains a well levelled and uniform surface after the soil
has been worked.
4.7.1 HOW TO WORK
Adjust the roller ( 8 Fig. 1 ) to suit the degree to which the soil must be crumbled, engage the PTO and begin to move forward
with the tractor, progressively lowering the implement. Cover a short distance, then check to make sure that the work depth, soil
crumbling and ground levelling operations have been carried out in the required way.
CAUTION
The speed of the tractor when the machine is operation must not exceed 5-6 kmh or components could be broken or dama-
ged.
DANGER
The blades may throw up stones or other sharp objects as they spin. Constantly check to make sure that there are no by-
standers, children or domestic animals within the range of action of the machine.
4.7.2 USEFUL ADVICE
Depth too shallow
Check the depth adjustment
▪
Move forward more slowly. There may be insufficient tractor power. Raise the rear roller
▪
Fig. 12
Fig. 13
Fig. 14