Vaderstad RAPID RDA S Series, Manual

Page: 87 / 118

RDA 600-800 S
Ver.3 29/06/07 87
5.1.3 Hydraulic electric valves
An electric valve contains a coil that operates as an electromagnet when current is fed to the valve.
Do as follows to check whether the valve receives current:
The LED on the connector lights and the coil becomes warm after a few minutes. Also, the nut on
the top of the valve becomes magnetic.
Use a small screwdriver or the edge of a knife blade to check whether the nut on top of the valve
is magnetic. Since residual magnetism may be present in the nut, perform this inspection with the
power switched on and off.
!
The bout marker valves (A) and (B) receive current when their indicator lamps on the Control
Station light and the machine is in the low-lift mode.
!
The lift stop valve (C) receives current when the lift stop is engaged or during lifts in the low-
lift mode.
!
The pre-emergence bout marker's electric valve (D) receives current when the tramline indica-
tor lamps on the Control Station light when the machine is in the low-lift mode.
NOTE!
Signals to the bout marker and pre-emergence bout marker are not output from the Control
Station until the machine is set to the low-lift mode.
Figure 5.1 Figure 5.2
C
B D
A