Manitowoc National Crane NBT40-1 Series User Manual

4-6 3-29-2018 Control # 610-00
OPERATING CONTROLS - CRANE NBT40-1 SERIES OPERATOR MANUAL
Front Center Stabilizer Switch
Center front stabilizer switch (3, Figure 4-1) is used to lower
and raise center front stabilizer. To operate center front
stabilizer, press center front stabilizer switch and then press
extend/retract switch.
NOTE: Center front stabilizer automatically retracts if any
other components are adjusted and must be reset
if operation is to be continued.
Leveling of Equipment
If crane is not level to within 1% of grade, allowable
capacities must be reduced. Therefore, when lifting on
outriggers, it is essential that crane is level to within 1% of
grade. Bubble level that is provided on the crane is calibrated
to be accurate within 1% of grade. If equipment is out of
level, an audible alarm will beep indicating releveling is
necessary. To properly level equipment, refer to Outrigger
Setup, page 4-17. An interlock will not allow crane functions
to operate during set-up.
To properly level crane, boom must be positioned over front
of crane, fully lowered to horizontal and fully retracted. Boom
must be stowed onto boom rest to disengage interlocks to
raise and level crane using outriggers.
Frequently check crane for level since working crane may
settle during lifting operations. When rechecking crane for
level, boom must also be positioned over front of crane, fully
FIGURE 4-2
4
1
Item Description
1 Outrigger Midspan Selector Pin
2 Outrigger Extension Beam
3 Level Indicators
4 Outrigger Jack
5 Outrigger Float Stow Peg
6 Outrigger Float
7 Ground Station O/R Panel
3
3
2
6
4
7448-1
5
7

Manitowoc National Crane NBT40-1 Series Specifications

General

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