Operation
Lifting and Loading
The load chart is only installed on machines with object handling equipment, it is located on the right hand
window of cab and roof of the canopy. The chart shows how far you can raise and extend a load without
exceeding the safe working load. Each machine model has its own specific load chart.
The relevant load chart for your machine contains a part number. If the chart is missing or damaged a new
decal must be attached, contact your JCB dealer for advise if you are not sure.
Refer to: Performance Dimensions (Page 151).
Overload Warning System
WARNING You must set the overload warning switch to on before using the excavator for object handling.
If you do not turn the switch on this could lead to a stability hazard.
The overload warning system senses the pressure in the boom cylinder hydraulic circuit, and gives an audible
warning when the pressure exceeds the predetermined limits and there is a risk that the machine could become
unstable.
When the machine is used for lifting, the system must be switched on. The system defaults to on every time the
ignition switch is turned on. Push the overload warning switch to silence the buzzer when in an overload state.
When the system is active the symbol on the display is illuminated. Refer to: Instrument Panel (Page 47).
The overload warning switch is situated on the right hand switch panel. Refer to: General (Page 18).
WARNING! When the overload protection system buzzer sounds, you must decrease the machine lift. If you
do not decrease the machine lift a stability hazard could occur. When the machine is in a safe position the
buzzer stops.
If the safe operating lift limit is exceeded the buzzer will sound. When the buzzer sounds, the operator must do
the necessary corrective action to reduce the lift. When this is fulfilled, the buzzer is cancelled and the system
resets automatically.
When not lifting, the overload circuit should be switched off. Otherwise the alarm will activate during digging
operations giving nuisance alarms.
All lifting operations must be done in accordance within local lifting regulations.
61 9831/8250-4 61
JCB © Admin Pimteam - 23/06/2021 05:32.
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