Manitowoc National Crane NBT40 Series User Manual

3-16 Published 4-23-2018 Control # 239-11
OPERATING CONTROLS & PROCEDURES NBT40 SERIES OPERATOR MANUAL
HOIST SYSTEM OPERATION
The hoist may have lifting capabilities greater than that of the
crane limits. Therefore, care must be taken to ensure that the
load lifted is within the crane rating. General rules for hoist
operation are:
• Unwind the hoist when extending the boom.
• Use the anti-two-block system only as an aid.
• Make sure the rope is not twisted or kinked and that it is
properly seated in the hoist and in sheaves.
• Always have at least three full wraps of rope on the
hoist.
• Check the hoist brake when approaching the load limit of
the hoist. Raise the load a few inches and return the
control to neutral to check the brake.
• Do not drag the load with the hoist.
• Do not try to lift loads that are not free such as, frozen
down material or poles.
• Keep tension on the rope to prevent it from becoming
twisted, kinked, or improperly seated on the hoist.
Hoist Two Speed Operation
The high speed increases hoist line speed over normal
operation. The high speed mode is activated by a switch (10,
Figure 3-3) located on the crane cab console.
.
To start the high speed, depress the high speed switch and
operate the hoist lever on the armrest. Refer to the load chart
for more capacities
NOTE: Maximum Capacity with high speed on 5th layer.
• One Part Line - 5,000 lbs. (2272 kg)
• Two Part Line - 10,000 lbs. (4544 kg)
• Three Part Line - 15,000 lbs. (6818 kg)
• Maximum line speed on third layer - 351 FPM
(107 mpm), fourth layer - 383 FPM (117 mpm)
WORK SITE LOCATION
Select a location that is firm, level, and dry. Avoid uneven,
rocky or muddy terrain, steep grade or locations with
overhead obstructions. The outrigger stabilizers must be
supported on a firm level surface at the fully retracted,
mid-span, or fully extended positions. Avoid overhead power
lines.
Before Leaving the Truck Cab
• Position the truck so that the outriggers can be extended
with no obstructions.
• Position the truck transmission to neutral.
• Set the truck park brake. Wheel chocks may also be
required.
• Engage the power takeoff.
• Turn the truck cab switch to OFF.
Startup Graphic
Operational Graphic
FIGURE 3-14
8131-1
8131-2
CAUTION
If the high speed feature is run continuously or with an
overload, damage to the crane or truck could occur.

Manitowoc National Crane NBT40 Series Specifications

General

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