Maeda MC-174CRM, Operation Manual

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1.3.2 DESCRIPTION OF EACH SWITCH
[1] EMERGENCY STOP CANCEL SWITCH (9)
•
Do not turn the emergency stop cancel switch to the ON (cancel) position except in a machine
failure condition or when conducting a load test. When the emergency stop cancel switch is in
ON position, the moment limiter functions are not available. Any crane operation in such
conditions will result in dropping of hoisted load, breakage of crane boom, and/or crane
tipping due to over load, and may cause a serious accident resulting in death or serious injury.
Key for the switch must be detached during normal operations.
•
Do not turn the emergency stop cancel switch to the ON (cancel) position when stowing the
hook.
The winch wire rope may be cut causing the hook to fall on or damage the boom.
Use the hook stowing switch when stowing the hook.
Use the emergency stop cancel switch only for the purpose to
release emergency stop when the safety device of the Crane
seems to have a failure, or when a load test is required.
Open the cover when using the switch.
•
ON (Clear): Insert the key into the switch. Turn the key clockwise
and retain the key at that position. The activation
stop function is cleared while the key is maintained at
the ON position.
•
OFF (Auto): Insert the key into the switch and turn the key
counterclockwise. The activation stop functions.
The key can be removed or inserted at this position.
[2] BOOM STOWING SWITCH (10)
•
The boom stowing switch cancels the auto-stop function of the lower-limit detecting interlock
device during the boom “lowering” operation.
Operate the boom derricking lever carefully when stowing the boom. Pay sufficient attention
not to let the boom collide with the machine body.
•
Use the boom stowing switch only when stowing the boom.
Use this switch to stow the boom.
•
ON: Keep pushing the switch downward and operate the boom
derricking lever to
“LOWER” side. The boom lowers and
can be stowed.
•
OFF: Release your finger from the switch. The switch returns to
the original position and the auto-stop function of the
lower-limit detecting interlock device will be activated.