Manitowoc National Crane NBT40-1 Series User Manual

4-10 3-29-2018 Control # 610-00
OPERATING CONTROLS - CRANE NBT40-1 SERIES OPERATOR MANUAL
RCL and Minimum Wrap Bypass Switch
RCL bypass switch (6, Figure 4-3) is a momentary
on-off switch, turn key to the On position (right) to disengage
RCL controls and minimum wrap lockout controls. Releasing
key allows RCL and minimum wrap controls to re-engage.
RCL and minimum wrap system will be bypassed only as
long as switch is in the On position.
Turning key switch to On position re-engages boom down,
telescope out and hoist controls. These functions were
disabled when an overload condition was sensed by rated
capacity limiter (RCL). It is important to read and understand
RCL Override Warning information in RCL Operator Manual
before using RCL Bypass switch (6) or RCL ON/OFF switch.
Bypass switch will also re-engage main and auxiliary hoist
controls disabled by minimum wrap indicator sensor system.
RCL control can be turned completely off and back on using
switch (1, Figure 4-5) located behind cab seat.
Hydraulic Oil Indicator
Hydraulic oil temperature warning light (7, Figure 4-3) is
located on ground control cab console and illuminates when
hydraulic oil overheats. If overheating occurs, run
equipment at idle with controls in neutral until light goes out.
Main Hoist Minimum Wrap Indicator
When main hoist is down to last rope layer minimum wrap
indicator (9, Figure 4-3) will flash intermittent and minimum
wrap buzzer (2, Figure 4-5) will sound intermittently.
When amount of rope left on hoist reaches minimum wrap;
indicator light will be constant, buzzer will be constant and
hoist will be disabled by minimum wrap sensor system.
Main Hoist Speed Switch
Main hoist speed selector switch (10, Figure 4-3) is located
on console. It is a three position switch (on-off-on),
placarded as rabbit (fast) hoist motor speed and turtle
(slow) hoist motor speed.
Hand Throttle Control
Push/pull hand throttle (11, Figure 4-3) is located on ground
control console and has following functions.
Increase Engine Speed - Push in and hold center button (1,
Figure 4-6); pull out on knob (2) to accelerate engine.
DANGER
RCL only aids operator when properly programmed with
proper Load Chart/Reach Diagram and crane
configuration. To prevent injury or death to personnel, be
sure RCL is programmed before crane operation.
DANGER
Crane operation with the LMI system will prevent the LMI
system from operating and will result in Death or Serious
Injury.
Use override switch only under emergency conditions and
follow all operating precautions on the crane and in the
manual.
!
!
NOTICE
Do not operate the equipment with overheated hydraulic
oil or damage to seals in the hydraulic components may
result.
FIGURE 4-5
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Manitowoc National Crane NBT40-1 Series Specifications

General

Brand	Manitowoc
Model	National Crane NBT40-1 Series
Category	Construction Equipment
Language	English