National Crane
Published 5-27-2018 Control # 039-06
9-3
800D
INSTALLATION
MINIMUM TRUCK REQUIREMENTS
Many factors must be considered in the selection of a proper
truck for a 800D series crane. Items which must be
considered are:
1.
Axle Rating.
Axle ratings are determined by the axles,
tires, rims, springs, brakes, steering and frame strength
of the truck. If any one of these components is below the
required rating, the gross axle rating is reduced to its
weakest component value.
2.
Wheelbase, Cab-to-Axle (CA).
The wheelbase and CA
required are in part determined by the mounting
configuration but also by the boom length and the
platform length of the particular unit. Match the platform
length to the retracted boom length so that the boom
doesn’t overhang the rear of the bed by more than that
required by legal regulations where the unit will be
operated. The truck cab-to-axle dimension is then
determined by the length of the bed (the bed should be
approximately centered over the rear axle) and the
mounting space that the crane frame takes up between
the cab and the bed.
3.
Truck Frame.
Try to select a truck frame that will
minimize or eliminate frame reinforcement or extension
of the after frame (AF). Many frames are available that
have the necessary after frame (AF) section modulus
(S.M.) and resistance to bending moment (RBM) so that
reinforcing is not required. The front hydraulic jack is
used for a 360 degree working range around the truck.
The frame under the cab through the front suspension
must have the minimum S.M. and RBM because
reinforcing through the front suspension is often difficult
because of engine, radiator mounts and steering
mechanics. See “Truck Requirements” and “Frame
Strength” pages for the necessary section modulus and
resistance to bending moment values.
4.
Additional Equipment.
In addition to the axle ratings,
wheelbase, cab-to-axle requirements and frame, it is
recommended that the truck is equipped with electronic
engine control, increased cooling and a transmission
with a PTO opening available with an extra heavy duty
PTO. See “PTO Selection” pages. A conventional cab
truck should be used for standard crane mounts.
5.
Neutral Start Switch.
If equipped with optional remote
controls or remote start at the controls, the chassis must
be equipped with a switch that prevents operation of the
engine starter when the transmission is in gear.
Fo
r
Reference
Only
Содержание National Crane 800D
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Страница 194: ...SPECIFICATIONS 800D 8 4 Published 5 27 2018 Control 039 06 THIS PAGE BLANK F o r R e f e r e n c e O n l y ...
Страница 216: ...INSTALLATION 800D 9 22 Published 5 27 2018 Control 039 06 THIS PAGE BLANK F o r R e f e r e n c e O n l y ...
Страница 232: ...CRANE INSTALLATION 800D 10 16 Published 5 27 2018 Control 039 06 THIS PAGE BLANK F o r R e f e r e n c e O n l y ...
Страница 252: ...SCHEMATICS 800D 2 Published 5 27 2018 Control 039 06 F o r R e f e r e n c e O n l y ...
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