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If the spade folding has been actuated by the rotary preselect switch and the manual
valve at the digging head (see section 3.1.3), get spades folded in completely and then
rotate switch back to position 0.
3.2.6 Now digging can commence:
control panel, lever
11, spade ▼"down".
control panel, lever 12, spade ▼"down".
control panel, lever
13, spade ▼"down".
control panel, lever
14, spade ▼"down".
control panel
, lever
15, spade ▼"down".
In order to ensure proper digging and obtain full root ball depth, the digging head must
remain in a horizontal position. This is achieved by activating two spades opposite to each
other at a time until about one third of the spades has been pressed into the ground. Then
two other opposite spades are activated and dig about one third of the depth. This
crosswise digging is repeated until all five spades have been completely pressed into the
ground.
The digging depth of one third of the spade per working cycle should be regarded as a
rule of thumb only, since the actual working depth depends on the type of soil. Whenever
the blades encounter too much resistance by hard soil and the digging head is lifted up,
the next pair of opposite blades should be activated.
3.2.7 The root ball pads are meant to support the coherence of the root ball. Once the root ball
has been dug, the pads should be pressed gently on the root ball.
control panel, lever 4, root ball pad LH
▼"down".
control panel, lever 4, root ball pad RH ▼"down".
3.2.8 For lifting the root ball together with the tree, the rear stabilizers must be extended first, as
explained under section 3.2.1.
3.2.9 Then the tree is lifted in vertical position by means of joystick functions 20 and 21. As
soon as the digging head has been lifted above the elevation of the base frame, it must be
rotated into a horizontal position:
control panel, joystick 20, digging head rotation ▼"in".
The main lift arm A is lowered until the upper edge of
the lift arm is level with the LH side of mark C on base
frame B. An arrow indicates the LH side of the mark.
(illustration 4).
control panel, joystick 20, main lift arm ▼ "down"
Illustration 4