Manitowoc Published 08-06-19, Control # 237-09_v1 3-45
MLC165-1 OPERATOR MANUAL OPERATING CONTROLS AND PROCEDURES
c. Remove the pins (3) and lift the upper wire rope
guide (2) out of the insert.
d. Store the upper wire rope guide and pins for future
use.
Closing the Bucket (Digging)
1. Lower the bucket into the digging area using both control
handles.
2. Pull back the closing line handle to close the bucket.
3. Release the closing line handle to off when the bucket is
closed fully.
Raising the Bucket
1. Pull both control handles back to raise the bucket at the
desired speed.
2. Swing to the dumping area as the bucket rises.
3. Release both control handles to off when the bucket is at
the desired height.
Dumping the Bucket
1. Push the closing line handle forward to dump the bucket
at the desired speed.
2. Release the closing line handle to off as soon as the
bucket is empty and fully open.
NOTE Use care not to slacken the closing line while
dumping. Any slack in the closing line will have to
be taken out while digging. This slows down the
clamshell cycle.
Lowering the Bucket
1. Push both control handles forward to lower the bucket at
the desired speed.
2. Control the lowering speed by slowly moving both
control handles toward the off position.
NOTE The lowering speed is controlled by handle
movement. It is not necessary to apply the free fall
brakes to slow down the bucket in full-power
clamshell operation.
3. Swing back to the digging area as the bucket lowers.
4. Stop swinging when the bucket lands in the digging
area.
5. Release the holding line handle to off.
6. Repeat the clamshell cycle.
NOTE Clamshell operation can also be performed with
the load drums in the free fall mode. Free fall
operation is limited to the following:
• Placing Drum 1 in free fall allows the bucket to
dump via free fall when the closing line handle
is pushed forward. Use the working brake as
needed to control bucket opening.
• Placing Drum 2 in free fall allows the holding
line to go slack when the closing line handle is
pulled back to dig into material. This allows the
weight of the bucket to assist with digging into
material. Use the working brake as needed to
control bucket lowering.
• To allow Drum 2 free fall to engage, the last
direction of the holding line must be in the
down direction. This will allow the operator to
increase closing line tension while raising the
bucket.
• Both modes can be on at the same time,
however, you will not be able to free fall both
lines at once.
The operator can adjust free fall drum slip to assist
in preventing the drums from overspooling.The slip
command adjusts the accessory pressure
available to both free fall pedals: therefore, a slip
adjustment to either Drum 1 or 2 affects both
drums.
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