Kalmar DRD450-80S4X, Maintenance Manual

Page: 227 / 600

UDRF01.04GB
Maintenance manual DRF 400–450
8 Control system – 8.2.2 By-passing 11
8.2.2 By-passing
page –
By-passing, description
When the overloading system is activated and turns off the hydrau-
lics it may be in a situation where it is necessary to by-pass the safe-
ty system.
By-pass is activated with a switch, there is one to three switches de-
pending on the machine's equipment:
• Switch by-pass
• Switch by-pass of load centre and height limitation
• Switch rotation stop
By-passing the safety system makes it possible to:
• lowering of load in case of overloading
• locking and opening twistlocks without full alignment
• Spreading 20’-40’ with locked twistlocks
• bottom lift without full alignment
• manual control of recirculation damper for ECC or EHC
• release of parking brake in case of malfunction of switch parking
brake
• lift above height limitation
• rotation past rotation stop
• load handling past limitation for load centre limitation.
• lifting, lowering and extension with active error on overloading
system
8.2.3 Load centre limitation
page –
Load centre limitation, description
Load centre limitation prevents the load from coming too close to
the machine. The load centre limitation is controlled by the control
system with signals from Sensor boom angle and Sensor boom
length. For example, this is used in connection with cab lift to pre-
vent that the container damages the cab.
For details about lift, lower and extension, see section 7 Load han-
dling .
D A N GE R
By-passing the safety systems results in risk of tip-
ping forward, use at your own risk.
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