National Crane Published 10-30-2014 Control # 040-09 2-17
1400H OPERATOR AND SERVICE MANUAL OPERATING CONTROLS
1. All outriggers are extended with positive contact on firm,
level surface, the tires are free of the ground and the
machine is level within 1°.
2. The proper amount of counterweight has been installed,
if required.
3. The unit is mounted in accordance with factory
instructions on a vehicle with proper specifications.
4. The weight of load handling devices is considered as a
part of the load being lifted.
5. The correct loadline reeving is used for the load to be
lifted.
6. Adverse environmental conditions such as wind are not
present.
7. The operator controls the loads smoothly.
8. The load to be handle does not exceed the maximum
capacity at the boom length and loaded radius.
A stability test should have been performed on this
crane and can be repeated by referring to the Installation
Section.
Series 1400H Load Chart - Full Span
Outriggers
The load chart for a Series 1400H with a 30 ft to 100 ft
boom with a 30 ft to 54 ft jib and with outriggers extended to
full span is shown in Figure A. To the right of the range
diagram the outriggers are shown at full span. Below this
pictorial, all maximum rated loads are shown in columns
based on boom length (30 ft, 44 ft, 58 ft, 72 ft, 86 ft and 100 ft)
and on load radius (6 ft, 8 ft, 10 ft, 12 ft, etc.) Loaded boom
angles for each load at each radius are also listed directly to
the left of the load. Boom length is measured from the pivot
pin point at the base of the main boom to the tip of the
sheave case on the last boom section. Fully retracted this
boom is 30.16 ft (9,19 m) long and fully extended it is 100 ft
(30,48 m) long. The boom length is 0.5 ft (0,15 m) shorter if
the loadline is reeved for multipart operation. Decals on each
side of the second stage boom show the boom lengths as
listed above when the hash mark at the bottom of the decal is
completely exposed from the first stage boom. An angle
indicator is located on the side of the boom near the
operators station. The boom length decals and the angle
indicator can be used to verify the boom length, boom angle
information shown on the “rated capacity limiter” (RCL) in the
operators station. The load radius is listed in a column at the
left side of the rating chart. Load radius is the horizontal
distance from the centerline of rotation of the swing bearing
to the center of the loadline when the load is suspended.
Lifting a load will cause the radius to increase due to boom
deflection, oil compression in the lift cylinder and outrigger
and subbase deflection, therefore the boom must be raised
slightly when lifting maximum loads in order to maintain the
correct radius.
When lifting maximum loads, always operate the crane
slowly and smoothly or the RCL will stop operation
prematurely due to pressure spikes in the lift cylinder. Load
ratings shown assume the jib is stowed on the first section
boom. The chart “ADD TO CAPACITIES WHEN NO JIB
STOWED” in Figure A below the load ratings, shows the
amount the rated load can be increased for a given boom
length when no jib is stowed on the side of the boom. The
RCL automatically compensates for this when set to the
proper mode.
In order to lift loads over the front of the vehicle an
optional front jack is required. If a working area diagram
decal as shown below is present, the crane is not equipped
with an optional front jack and loads can only be lifted in a
circular arc about the centerline of rotation as shown on the
working area diagram. (Except if equipped with a Rear
Mount Configuration).
The shaded areas of the load chart are structurally limited
loads. The non shaded areas are loads which are limited by
stability.
The range diagram in the upper left corner shows the
operating radius and height of the unloaded boom and/or jib.
It should be used as a guide to position the unloaded boom
tip or jib tip over the load and to determine approximate
height to which the load can be lifted.
The stability limit line at the right hand side of the range
chart shows the maximum radius to which the unloaded
boom with suspended 180 lb hook block may be extended
when operating anywhere within the safe working area of the
crane. Attempting to extend the boom or jib tip beyond these
lines can cause tipping to occur with no load on the hook
block.
A hoist data chart is shown at the bottom of Figure A.
Loads which weigh more than the hoist single part rated line
pull must be multi-part reeved so the hoist system is not
overloaded. The RCL will limit the maximum allowable load
to the lower value of either the maximum capacity of the
crane or the maximum capacity of the hoist reeving system.
180°
FULL CAPACITY
WORK AREA
WORK AREA DIAGRAM
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