* Emergency stop: see chapter 2.1
42
Fig. 14-7
Fig. 14-6
14.5
COLLECTING BLOCK
(See fig. 14-7.)
The collecting block contains all the valves which control and regulate the various functions
concerned with loading and off-loading the bales.
V20
Selector valve
(CP 520-1.) (Electric cable no. 11.)
When the width between the rollers is reduced (while loading) and they reach the position
at which the switch on the left bearer arm has been adjusted to trip (see section 10.1), this
valve will then be activated. It directs all the oil to the width cylinder, and the bale is lifted
right up into the machine. It is also activated by ROLLER WIDTH OUT.
V22
Roller operation valve (Sequence valve.)
(CP 240-8L.)
When the oil pressure reaches the preset level, this valve opens to direct oil to the left-hand
roller motor while loading. It is preset at the factory to 120 bars. The pressure is measured
in the hose between the tractor and the bale wrapper when 'roller width in' is activated and
the maximum clamp pressure switch is not operating.
V23
Clamp valve
(CP 230-2.)
This keeps the clamp pressure in the width cylinder constantly at the preset level. It is
preset at the factory to 70 bars. When the pressure rises higher than this, the valve closes
and the oil is directed to the left-hand roller motor via V22. The roller motor will then rotate
in under the bale and help to load it up.
V24
Check valve
(CP 100-1.)
This valve closes when full clamp pressure is reached. This is to prevent the oil pressure
"leaking out" through V23.
V26
Holding valve
(CP 440-1.)
This maintains the current pressure on the minus side of the width cylinder when it is not
activated.
It also controls the pressure for the disconnecting function.
V27
Holding valve
(CP 440-1.)
This maintains the current pressure on the plus side of the width cylinder when it is not
activated.
V28
Check valve
(CP 100-1.)
This valve closes when wrapping is in progress. This is to prevent the oil "leaking out"
through V22.
