SHB 28Z3 EN – Edition 2.0 * 28z3s710.fm 7-15
Options
Retracting the stick ram
• The ram can be retracted as usual (always “free flow” towards the ram).
The built-in non-return valve safely holds the load in rest position.
Extending the stick ram
• Pilot control pressure moves valve (2) to work position (free oil flow to the base side).
• The valve moves back to home position if the pilot control pressure drops.
In addition, safety valve (1) protects the hydraulic rams from overload. Overload actuates
pressure switch (4), the warning device comes on and the buzzer sounds.
Notice!
The valve settings are sealed, no modifications for legal reasons!
Extending the stabiliser blade ram
The ram can be extended as usual (always “free flow” from the ram).
Retracting the stabiliser blade ram
Check valve (8) is controlled in parallel by the operating pressure (free oil flow to the base
side).
Diagram (from serial no. AG04828)
Stick
1
6
2
3
6
4
3
7
2
1
Stabiliser blade
8
Boom
1
2
3
4
5
6
6
1
2
3
4
5
7
7
7
5
5
8
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