OPERATING CONTROLS AND PROCEDURES MLC300 OPERATOR MANUAL
3-76
Published 11-20-19, Control # 234-19
b. Leave the free fall brake pedal latched down.
c. Pull the drum control handle BACK from OFF to
RAISE the load. The drum brake will release.
d. As the load nears the desired position, slowly move
the drum control handle toward off to slow down the
load.
e. To stop the load, release the control handle to off.
The drum brake will apply hold the load in position.
f. To hold the load in position for long periods, turn on
the drum park switch.
5. To LOWER LOAD using full power:
a. Increase engine speed to the desired RPM with the
hand throttle. Press the foot throttle to momentarily
increase the engine speed when more power is
required.
NOTE Load drum speed can be adjusted between 25% and
100% to meet operator needs. See the Speed and
Limits Screen topic in the Main Display Operation
Manual for detailed instructions.
b. Leave the free fall brake pedal latched down.
c. Push the drum control handle FORWARD from OFF
to LOWER the load. The drum brake will release.
d. As the load nears the desired position, slowly move
the drum control handle toward off to slow down the
load.
e. To stop the load, release the control handle to off.
The drum brake will apply hold the load in position.
f. To hold the load in position for long periods, turn on
the drum park switch.
6. To LOWER LOAD using free fall brake pedal:
a. Leave the drum control handle in off and release the
free fall brake with the brake pedal to lower the load
at the desired speed.
As the load nears the desired position, gradually
depress the brake pedal to apply the free fall brake
and slow down the load. Then fully apply the free
fall brake with the brake pedal to stop the load
and hold it in position.
b. If the load will be suspended for any length of time,
latch the free fall brake pedal down and turn on the
drum park switch.
7. To switch load handling from the free fall brake pedal to
the corresponding drum control handle:
a. While the load is being lowered with the free fall
brake pedal, slowly move the drum control handle in
the desired direction from off. The following will
occur:
• The free fall brake will gradually apply in
proportion to drum control handle movement.
• The free fall brake will fully apply momentarily to
stop the load.
• The drum brake will release and the load will
either lower or rise depending on which way the
drum control handle was moved in step 7a
.
b. When the drum control handle is moved to off, the
load will stop if the free fall brake is already latched
down.
WARNING
Falling Load Hazard
Free fall operation is limited to 8 300 kg (18,300 lb) per
part of line when lowering a load with the free fall brake
pedal. Hydraulic power shall be used for full line pull.
Permanent brake damage could occur, allowing the load
to lower uncontrolled.
WARNING
Falling Load Hazard
When operating either drum in free fall, do not exceed 225
rpm free fall lowering speed (Figure 3-25).
Exceeding this limit is not recommended and can result in
accelerated wear and reduced free fall brake life. The
brake could slip allowing the load to lower uncontrolled.
WARNING
Falling Load Hazard
When operating in free fall, the load will lower
uncontrolled if the free fall brake is not applied when the
drum control handle is released to off.
Be ready to apply the free fall brake with the brake pedal
so the lowering speed can be controlled and the load can
be stopped immediately when necessary.
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