6
2. During harrow working tyre can be locked at point (T)
1.
Angle of the gang
3.
Disc diameter
5.
Angle of hitch
3.
Attach the left arm of the tractor to the harrow first.
Factors affecting disc harrow penetration are
4.
Attach the central arm to the harrow. To attach, turn the screws on both
sides to an equal length. If the arm is too short or too long, turn the screw to
adjust both at the same time until aligned with the hole on the central arm.
2.
Weight of the harrow
4.
Disc sharpness (Blunt disc increases the draft considerably, check the
disc sharpness)
2.2 ATTACHING THE HARROW TO THE TRACTOR
2.
Reverse the tractor to the harrow ( Do not drag the harrow up the tractor)
1.
Place the harrow duly leveled on the flat piece of land.
g) Disc harrow penetration
Fig. 2.1(g)
T
5
2.
This adjustment also slightly changes the depth of cut. Choose the hole that
better fits your tractor drawbar. The upper hole (A) allows a deeper penetration
than the lower (B) hole of the centre joint assembly frame.
h) Maneuver direction
Never maneuver to the right hand side, because the angle formed by the disc
angle, transmits great effort to the implement, overloading mainly the pulling
components i.e. offset bar, drawbar etc.
1.
The centre joint assembly frame have two holes for vertical adjustment of
drawbar, this assembly is used for better fit in different tractor models.
I) Tyre attchment assembly
Fig. 2.1(h)
1. During transportation drawbar should be locked at point
(A, B) and tyre assembly at point (P) with the help of pin.
Fig. 2.1(i)
P
A
B