Maeda MC815C, Руководство по эксплуатации, Страница: 56 / 426

46
CAUTIONS WHEN OPERATING CRANE
• Be sure to check that the Override switch is at the “OFF” position before operating the crane.
Do not attempt to operate the crane with the Override switch kept set to the “ON” position.
Use the Override switch only when the safety device have failed or when conducting a load
test, or when cancellation of activation stop is desired as necessary.
If the Override switch is placed in the “ON” position, the warning buzzer sounds intermittently.
• Crane operations are not possible when the outriggers are placed in extension condition. The
crane operation is also interrupted when the outrigger tray leaves the ground during
operation. Securely place the crane in the extension condition, and avoid operations and
works that may cause the machine to vibrate when operating the crane.
• Attempt to work beyond the capacity of the Machine may cause serious accidents and
failures caused by for instance tripping or fluctuation. Observe the rated total load chart when
operating the crane.
• Be sure to follow the usage conditions when traveling with a hoisted load.
This may cause the crane to fall over resulting in serious accidents.
• Perform the crane operation slowly.
Sudden use of lever or accelerator may cause risks such as shaking, dropping of the load or
collision with the surroundings. Be especially careful to be slow during the slewing
operations.
• Do not allow unauthorized personnel to approach the working radius or under the load
because of risks of falling load and contact with load. This could cause a serious accident.
Also consider that the working radius increases when the load is hoisted and the boom is
deflected.
• It is dangerous to operate the crane under bad weather or at places where the view is not
clear.
Work lamps or other lighting devices should be used in dark places.
When the view is bad because of bad weather (rain, fog, snow, etc.), stop the operation and
wait until the weather recovers.
• Do not use for purpose, for instance raising a person using a crane, other than the true
purpose.
• If the alarm buzzer of the over-hoist detector sounds, immediately release your hand off the
operation lever. Winding-up of the hook block stops. Then, operate the operation lever
“downward” (push it forward) to wind down the hook block. The hook block also rises when
you attempt to extend the boom. Provide sufficient clearance between the boom and hook
block when performing crane operation.
• When the boom is extended, the hook block is wound up.
Operate the operation lever “downward” (push it forward) and extend the boom while
lowering the hook block.
• If it becomes overloaded during work, operate the operation lever “downward” (push it
forward) and wind down the winch to unload.
Do not raise or lower the boom acutely. Such attempt may cause serious accidents by
tripping.
• The volume of the hydraulic oil in each of the cylinders changes depending on the
temperature.
By leaving idle with a load being hoisted, as the time passes by the oil temperature drops and
the hydraulic oil volume decreases, and changes such as the boom derrick angle decrease
and boom length decrease may occur.
In that case, execute boom derricking operations and boom extension operations
appropriately to correct.
• Do not leave the driving operation position when a load is hoisted.
Lower the load before leaving the Machine.
• When the hook block is not used, wind up the winch.
The hook block of an empty load may hit operators near the load.