5-32 SHB 28Z3 EN – Edition 2.0 * 28z3s510.fm
Hydraulic system
5.12 Changeover valve for SAE/ISO controls (option)
The directional valve is located at the left behind the seat.
Danger!
Changing the directional valve over modifies the controls (control levers) –
Danger of accidents!
☞ Ensure that you know which control mode has been selected before start-
ing work
☞ Always secure wing nut J on the changeover lever of the directional valve
Switch-over carried out via ISO and SAE controls, and vice versa, with the directional valve.
☞ Tighten wing nut J after changing the control mode.
5.13 Proportional valve (option)
A proportional valve ensures a modifiable control signal (an electric signal) is steplessly
transformed into a proportional output signal.
Function and settings in the Operator's Manual.
Fig. 29: Directional valve position
Fig. 30: Directional valve
J
A
B
1
2
3
4
8
7
6
5
Position
Function
A ISO controls
B SAE controls
Directional valve ports
1
Joystick (right) port 1
2
Boom ram retraction control
3
Joystick (right) port 3
4
Main valve block, boom ram extension control
5
Main valve block, stick ram extension control
6
Joystick (left) port 1
7
Main valve block, stick ram retraction control
8
Joystick (left) port 3
Joystick (left)
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