Maeda MC405C-3 - Before Crane Operations

Section 4 – CRANE OPERATION Mini-Crawler Crane M A E D A
4-62 1/2019 MC405C-3
Before Crane Operations
CAUTION:
• Verify that all the lamps on the outrigger
display are illuminated in green before
performing the crane operation. The crane
cannot be operated if any of the four
outrigger extension lamps and four
outrigger grounding lamps is flashing in red.
• Set the travelling lock lever to the "LOCK"
position when operating the operation
levers of the crane system and outrigger
switches.
• When loosening the stowing of the hook
block, be careful not to topple the entire
hook block sideways on the ground by
loosening the wire rope too much. This will
cause irregular winding on the winch drum.
• When loosening the stowing of the hook
block, the hook block may slew and interfere
with the peripheral devices, resulting
breakage of the devices. Pay sufficient
attention around the hook block.
Perform the following operations before crane
operation.
1. Confirm that the moment limiter override
switch is set to the "OFF" position.
The safety device operation will not stop if the
switch is at the "ON" position.
Fig. 4-156
NOTICE: If the moment limiter override switch is
set to the "ON" position, the working status lamp
will flash in red, and the warning buzzer will
sound.
2. Operate the travelling lock lever (8) to the
"LOCK" position.
Fig. 4-157
3. Operate the work selector switch on the
outrigger operation panel to the "Crane"
position.
Fig. 4-158
4. Operate the winch lever (3) to the "DOWN"
(push forward) side to loosen the hook block
from the stowing position.
Fig. 4-159