Manitowoc Published 03-29-17, Control # 064-23 3-41
14000 OPERATOR MANUAL OPERATING CONTROLS AND PROCEDURES
working brake. Lowering speed is controlled by
handle movement.
As load nears desired position, slowly move drum
handle toward off to slow down load. Then fully
apply drum working brake to stop load and hold
it in position.
6. If load will be suspended for any length of time, latch
working brake pedal in applied position and turn on drum
park.
7. To turn free fall off:
a. Latch down free fall brake pedals on floor of
operator’s cab.
b. Turn drum free fall off in Drum Functions Screen for
each drum, as shown in Figure 3-25
.
c. Move Drum 1 or Drum 2 free fall selector handle
clockwise to off position as shown in Figure 3-24
.
Clamshell Operation
Preparing For Clam Operation:
1. Select desired Clamshell Capacity Chart on RCL display
to turn on clamshell mode.
2. Turn off drum park for both drums.
3. Set engine speed at desired rpm.
4. Clam closing pressure is set automatically.
Clamshell Operation In Full-Power
Perform Preparing for Clam Operation steps. Then proceed
as follows:
CLOSING BUCKET (Digging)
1. Lower bucket into digging area.
2. Pull back closing line handle to close bucket. The
holding line will pay out automatically allowing the
bucket to dig in as it closes.
3. Release closing line handle to off when bucket is closed
fully.
NOTE: Watch the closing line when digging in a blind area.
The bucket is closed when the closing line stops
moving.
RAISING BUCKET
1. Pull holding line handle back to raise bucket at desired
speed.
2. Swing to dumping area as bucket rises.
3. Release holding line handle to off when bucket is at
desired height.
DUMPING BUCKET
1. Push closing line handle forward to dump bucket at
desired speed.
2. Release closing line handle to off as soon as bucket is
empty and fully open.
Use care not to slacken closing line while dumping. Any
slack in closing line will have to be taken out while
digging. This action will slow down clam cycle.
LOWERING BUCKET
1. Push holding line handle forward to lower bucket at
desired speed.
2. Control lowering speed by slowly moving holding line
handle toward off.
NOTE: Lowering speed is controlled by handle movement.
It is not necessary to apply the working brakes to
slow down the bucket in full-power clamshell
operation.
3. Swing back to digging area as bucket lowers.
4. Stop swinging when bucket lands in digging area.
5. Bucket will stop lowering automatically when it contacts
ground.
6. Release holding line handle to off.
7. Repeat clam cycle.
NOTE: Clamshell operation can also be performed with
the load drums in the Free Fall configuration. Use
the working brakes to control the bucket when the
handles are in the off position. If the holding line is
operated in free fall, the closing line must also be
operated in free fall; otherwise, the closing line will
not keep up with the holding line and the bucket will
close while lowering.
CAUTION
Avoid Clutch/Motor Damage!
Do not move drum handle in either direction from off while
free falling a load. Serious damage to drum clutch and
motor could result. Stop load with drum working brake and
then move drum handle in desired direction.
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