2
1
3
25
28
26
1
2
1
1
1 mm
3
2
4
29
27
1
2
3
”HydroAvant” & "Avant" auto reset devices:
The reset force on both systems is adjustable. The
HydroAvant system can be adjusted from the
tractor seat.
"HydroAvant"
hydraulic auto reset system:
Connect with single acting spool valve.
To alter oil pressure open the shut-off valve (
27/1
).
The
minimum
oil pressure should be
110 bar
and the
maximum
apprx.
200 bar
.
After carrying out pressure adjustment shut valve
(
27/1
) again.
Adjust the reset force (oil pressure) so that the
plough bodies are kept firmly in the ground, but can
easily release when encountering obstructions.
Adjust the clearance between the angle lever (
28/2
)
and limit stop (
28/3
) to about
3
mm
– using the
adjustment screw (
28/1
).
To do so reduce hydraulic pressure.
”Avant” mechanical auto reset system
Turn screw (
29/1
) clockwise – less reset force
Turn screw anticlockwise – more reset force
Important:
leave a minimum clearance of
1
mm
between the angle lever (
29/2
) and limit stop (
29/3
).
In extremely heavy but stone-free ground, the
”Avant” reset device can be blocked with a special
locking device (
29/4
) available as accessory.
Shear bolt overload protection
All plough models are fitted with shear bolts (
25/1
).
Also the AVANT auto- reset models. The bolt head
should always be on the plough leg side.
After fitting a new shear bolt, ensure that the other
leg pivot bolt is tightened.
Use only ORIGINAL shear bolts.
(See parts list)
There is a danger of crush injuries when the
”activated” plough body swivels back.
Always approach the plough bottom from behind
only– the affected side of the plough faces
downwards.
If the swivelled bottom is ”blocked”, slightly slacken
the plough leg pivot bolt. Use suitable tools.
There is a special spanner provided (
25/3
)
part no. 4798.00.99.
Also to be used for the console bolts (see page 8).
Wear protective gloves.
I
t is important to observe the torque tensions
stated in this manual ( see pages 8, 10 & 12)
Shear bolt 1 / Pivot bolt 2
Fig. 25
Torque tension
Torque tension
Leg dia./ mm
Standard plough
Auto-reset
60 x 30
190 / 315
190 / 315
70 x 30
225 / 460
225 / 460
70 x 35
315 / 640
225 / 460
10
