Setting The Working Depth, Master And Slave Systems, Nza 600-1000 - Vaderstad NZ Aggressive NZA 600 Series Original Instructions Manual

Instructions and adjustments
3.7 Setting the working depth, Master and slave systems,
NZA 600-1000
Figure 3.9
After adjustment of the cultivator's longitudinal inclination by means of the turnbuckle, the master
and slave system will have to be adjusted.
The cultivator must be hitched to the tractor and the wing sections folded out.
The working depth (for cultivating) is controlled by three hydraulic rams coupled in series in a
Master and Slave system. To ensure an even working depth across the entire width of the cultiva-
tor, before starting work its hydraulic ram must be bled, "zeroised" and adjusted relative to one
another as follows:
! Raise the seed drill to the top position so that all hydraulic rams are fully extended. Keep the
hydraulic lever in this position with the tractor engine running at half speed for about 15-20
seconds. The rams have an overbleed arrangement in the top position so that the fluid can pass
through the system and flush out any air. At the same time, the rams are "zeroized" in relation
to each other. Always repeat this procedure for a few seconds when hitching the seed drill to
the tractor, before adjusting the seed drill, after extending and a few times during the working
day. NOTE!
After any work such as replacing a seal in a ram, air must be bled from the system as described
above, but for a period of approx. 1,5 minutes.
Adjustment must be carried out without any of the piston rods being disconnected from the mach-
ine.
Default settings.
NOTE!
To obtain the correct working depth in the field, the harrow must always be fully lowered
(hoses marked yellow) before any adjustment is performed.!
Figure 3.10
Lower the machine fully (hoses marked yellow) and then adjust the height with the harrow depth
function (hoses marked red) so that the pins are 1 cm above the ground. To get the whole machine
into a horizontal position, adjust the piston rod ends of the slave cylinders, see "Figure 3.10".
NOTE!
>Never unscrew the piston rod ends further than 50 mm!
If there is not enough range of adjustment on the slave cylinders, the master cylinder can be moved
to its other securing hole (A), see "Figure 3.11". The aforementioned adjustment is a basic setting.
The harrow must also be fine adjusted out in the field if a 100% work result is to be obtained.
26
Do not screw on any fitting in order to release air!
Figure 3.11
A
11.07.2011
ver. 2