Manitowoc National Crane NBT40 Series User Manual

3-10 Published 4-23-2018 Control # 239-11
OPERATING CONTROLS & PROCEDURES NBT40 SERIES OPERATOR MANUAL
and park the turret in position. Press the switch to activate
the swing brake to keep the turret from rotating. The swing
brake indicator (8, Figure 3-3) is illuminated when the swing
brake switch is applied.
The back half of the switch (1, Figure 3-8) is designed with a
locking mechanism to secure the swing brake in the locked
position and prevent accidental movement of the cab &
superstructure.
House Lock
The house lock control (40, Figure 3-3) is a manually
operated mechanical lock that when engaged prevents
rotation of the crane superstructure.
To engage the lock center the boom over the front of the cab
turn the T handle clockwise and push the knob back into the
locked position and move the superstructure left to right to
align the lock pin with the lock pin hole. To disengage, pull
out on the T handle and turn counter clockwise to lock the T
handle and pin in position.
Heater
The diesel powered supplemental heater is stowed under
the cab support frame and supplies heat to the crane cab
(36, Figure 3-4). The heater controls the temperature of the
crane cab by cycling coolant between the heater and the
climate control unit located under the cab seat. Controls (25,
26, 27, Figure 3-3) for the heater are located on the
overhead control panel in the crane cab.
Heater Cold Weather Fuel Mixture
At temperatures below 20° F (-7° C), add a cold weather
additive or mix kerosene with the diesel fuel at a 50/50 ratio,
Add the mixture to the heater diesel fuel tank (1, Figure 3-9)
located on the outside of the cab.
Heater Coolant
The heater coolant bottle (1, Figure 3-10) is mounted to the
turret and located inside the a/c compressor enclosure (2).
The coolant should contain at a minimum a mixture of water
and enough antifreeze to prevent freezing or slushing.
Adjustable Swing Speed Valve
The crane is equipped with an adjustable swing speed valve
(1, Figure 3-11) that sets the maximum swing speed of the
machine. Turn the valve knob clockwise to increase and
counterclockwise to decrease speed.
WARNING
Do not mix gasoline with diesel fuel.
FIGURE 3-8
1
7459-10
!
1
7459-11
FIGURE 3-9
1
2
FIGURE 3-10
7462-23

Manitowoc National Crane NBT40 Series Specifications

General

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