breviglieri b25f - 125, Operating And Maintenance Manual

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b
25
f
- 27 -
macchine agricole
where:
i = tractor’s wheelbase
d = horizontal distance between the center of gravity of the front ballast and the tractor’s front axle
s = horizontal distance between the center of gravity of the machine and the tractor’s rear axle
T = weight of the tractor in running order
Z = ballast weight
M = weight of the machine
0,2
T
T
Z
d i s
M
Fig. 5
4.4 DURING WORK
Proceed in the following way after you have correctly hitched the machine, sat down in the driver’s seat of the tractor and started
the tractor engine:
Raise the machine about 10 cm from the ground so that the rotor does not touch the vegetation that needs to be cut
▪
Run the engine at a low rate and engage the PTO
▪
Gradually accelerate until the PTO is operating at full rate
▪
Engage the forward gear and start work with the PTO at full rate
▪
Gradually lower the machine until it rests on the ground. This allows it to adapt to the contours of the soil.
▪
CAUTION
Do not depress the accelerator pedal in an imprudent way with the PTO engaged.
To break up the soil to the required degree, you must consider several factors, ex:
The nature of the soil (medium consistency, sandy, clayey etc.)
▪
The working depth
▪
The ground speed of the tractor
▪
Optimum machine adjustment
▪
For a better soil levelling and crumbling, the rotary tiller is equipped with a rear hood, with adjustable opening by means of a
locking chain and on request by means of a spring rod.
WARNING
Adjust the hook by keeping it as opened as possible to obtain a better levelling thus avoiding dangerous throwing of the
clods and stones as well as the hood itself
CAUTION
An excessive depth adjustment, in particular by means of the spring rod, means high efforts and early wear and tear.
A better soil crumbling can be obtained with a low tractor ground speed, the rear bar lowered and the blade-holder rotor spinning at