Maeda MC285C-3 - Prohibited Actions after Auto-Stop; Recovery Operation after Auto-Stop

Section 4 – MOMENT LIMITER (OVERLOAD DETECTOR) Mini-Crawler Crane M A E D A
4-68 1/2019 MC285C-3
Prohibited Actions after
Auto-Stop
The moment limiter is a device that is provided
for measures available for an emergency case.
In actuality, any operations relying on the device
will incur danger.
Operate the crane carefully so that it does not
stop automatically.
WARNING! Tip Hazard. Do not overload the
crane during operation. If the crane is
overloaded, the auto-stop feature will
activate, stopping the operation of the crane
automatically. The following operations are
prohibited after the crane has stopped
automatically:
• Boom lowering operation
• Boom raising operation
• Boom extending operation
• Hook raising operation
Recovery Operation after
Auto-Stop
If an automatic stop occurs, you will not be able
to clear the stop until you have reduced the load
factor to the safety area with a load factor of less
than 90% (Working Status Lamp: green).
Switch the engine speed to low speed and
operate the crane with caution if the moment
limiter load factor is 90% or higher.
WARNING! Tip Hazard. Always operate the
engine at low speed when the moment
limiter load factor is 90% or higher. Do not
operate the engine at any speed other than
low. Operating at any engine speed other
than low may cause an unstable operating
condition.
1. With load factor of less than 90%:
The Working Status Lamp flashes in green,
indicating normal operation status.
Fig. 4-182
2. With load factor of 90% to less than 100%
(pre-warning):
The Working Status Lamp changes from green
to yellow and the alarm buzzer sounds
intermittently, notifying the operator and those
around that the actual load is close to the rated
total load.
Fig. 4-183
3. With load factor of 100% or higher:
The Working Status Lamp changes from yellow
to red and the alarm buzzer now sounds
continuously. The following crane operations will
stop automatically:
• Boom lowering operation
• Boom raising operation
• Boom extending operation
• Hook raising operation
Fig. 4-184