Kalmar DRD450-80S4X, Maintenance Manual

Page: 222 / 600

UDRF01.04GB
Maintenance manual DRF 400–450
6 8 Control system – 8.2 Monitoring
8.2 Monitoring
page –
Monitoring functions, general
The machine is equipped with a number of control functions to in-
crease safety during load handling:
• Overloading system
• By-passing
• Load-centre limitation
• Height limitation
• Speed limitation
• Service indicator
8.2.1 Overloading system
page –
Overloading system, general
The machine is equipped with a warning system, LLMC (Longitudinal
Load Moment Control). Warning systems shall ALWAYS be function-
al! The system shall be used for stationary load handling, so that the
machine's forward stability is not jeopardized.
The following happens when the machine approaches the stability
limit:
• the buzzer in the cab sounds (indication to operator)
• warning figure is shown in the display (indication to operator)
• boom movement is interrupted
In this position the boom, and thus the load, can only be retract-
ed until the buzzer stops sounding and the display figure disap-
pears.
LLMC is not intended to control sideways stability or stability when
operating. Also, it does not take angled ground conditions into ac-
count.
NOTE
Retract the boom before it is lowered! Applies to all load han-
dling!
The overloading system is activated when the operator exceeds the
machine's load handling capacity. When the overloading system is
active all hydraulics are blocked, e.g., lift. With Switch by-pass, cer-
tain parts of the overloading system can be by-passed. This makes it
possible to lower and retract the boom to avoid dangers.
There are three versions of overloading system:
• Mechanical overloading system, function description page 8
• Mechanical overloading system with analogue position sensors,
function description page 9
• Electrical overloading system, function description page 10
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