Bucher iValve i250 - Page 29

iValve Lift Control Valve 7 Maintenance
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300-I-9010544-EN-01/10.2014
For iValve i250 only
Switch the main switch OFF
Close the ball valve (1)
Turn the slack rope safety device by 90°clockwise. (see Chapter 5.2)
Push the extension pipe onto the lever stub (3) of the hand pump
as far as it will go, then retract by approx. 2…3 cm
Push the hand pump lever (3) to the bottom stop (= operation of the
emergency lowering)
Make sure that the indication on the pressure gauge (4) has
dropped to zero
Remove the extension pipe from the lever stub (3) of hand pump
Turn the slack rope safety device by 90°anticlockwise to the original po
sition. (see Chapter 5.2)
For iValve i500 only
Switch the main switch OFF
Close the ball valve (1)
Press emergency-lowering lever (2) (releases pressure in the valve).
The pressure in the valve decays.
Make sure that the indication on the pressure gauge (4) has
dropped to zero
For i250 and i500
Undo the nut (5) in front of the solenoid UP/DOWN
Pull the solenoid coil UP/DOWN (7) together with the o-ring (6) off the
solenoid tube (8)
Unscrew the solenoid tube (8)(with a 27mm A/F open-ended
spanner)
Check the outer surface of the filter strainer (9) for soiling, clean if nec
essary or replace the filter strainer (9) resp.
Issue: 09.2015
29/31
Reference: 300-I-9010544-EN-01