Wacker Neuson 28Z3, Service Manual

Page: 210 / 264

7-10
SHB 28Z3 EN – Edition 2.0 * 28z3s710.fm
Options
Safe load indicator DE (up to serial no. AG02443)
Function
The hose burst valve is mounted direct on the base-side port of the boom ram.
Extending the boom ram
• The ram can be extended as usual (always “free flow” towards the ram).
In the event of a hose rupture, the load is safely held in base position by means of the non-
return valve.
Retracting the boom ram
• Pilot control pressure moves valve ( 2 ) to work position (free oil return from the base
side).
• The valve moves back to home position if the pilot control pressure drops.
1
6
2
3
5
4
Pos.
Designation
1
Safe load indicator cable
2
Pilot control segment port
3
Pressure switch
4
Set screw
5
Hose burst valve
6
Switch