Manitowoc National Crane NBT40 Series, Service Manual

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9
National Crane
Published 8-01-2017 Control # 287-11
9-7
NBT40 SERVICE MANUAL CRANE INSTALLATION
• Minimum truck and pusher weight required for stability
(truck with pusher axle raised).
- 22,798 lb gross
- 10,468 lb front axle
- 11,830 rear axle
NOTE: RC1000 add-on rotating counterweight may be
required for stability on NBT 40 depending on
configuration.
• Less Weight required if equipped with auxiliary hoist or
additional swinging counterweight.
• Additional options or heavier bare chassis weights will
require additional axles or a GVWR in excess of
65,000 lb; in some states special permits for overload
are required.
• Estimated Final Weight with the following machine
configuration.
NBT40 (Wet) - 62,000 lb and NBT 45 (Wet) - 64,500 lb
- 127 ft Boom, 400 lb 3 part block
- Aluminum Decks
- 70 gal fuel and two persons in cab
- Add - 1820 lb for 31/55 ft jib, 1105 lb for aux.
hoist with rooster sheave and 180 lb downhaul
weight.
Figure 9-4 shows the 360° working area. See “Truck Frame
Strength” section for truck frame strength required for
mounting crane.
Gross Vehicle Weight Rating (GVWR) is dependent on all
components of the vehicle (axles, tires, springs, frame, etc.)
meeting manufacturers' recommendations; always specify
GVWR when purchasing trucks.
Diesel engines require a variable speed governor and
energize-to-run fuel solenoid for smooth crane operation;
electronic fuel injection is required.
All mounting data is based on a National Series NBT40 with
subbase and an 85 percent stability factor.
The complete unit must be installed in accordance with
factory requirements, and a test performed to determine
actual stability and counterweight requirements; contact the
factory for details.
Transmission neutral safety interlock switch is required.
Reference Only