500E2 OPERATOR MANUAL SET-UP
National Crane Published 07-26-2019 Control # 111-06 4-5
not be exceeded. Over loading this crane may cause
structural collapse or instability. Do not rely on the HCA
system or the jib load limiting device to weigh the load
and control limiting boom angle and radius. Use these
system as a backup to safe operation.
2. Use the angle indicator as a reference only. When lifting
maximum loads, measure radius.
3. Rated loads do not exceed 85% of the tipping load as
determined by SAE Crane Stability Test Code J765a
when mounted on a factory recommended truck
NOTE: For New York City approved units, rated load do
not exceed 75% of the tipping load as determined
by SAE Crane Stability Test Code J765a when
mounted on a factory recommended truck.
4. Structural limited ratings on the load chart are shaded.
Stability limited loads are not shaded. Machine will not
always tip before structural damage occurs.
5. Rated loads include the weight of the hook block, slings,
other lifting devices and boom accessories. Their
weights must be subtracted from the listed rated load to
determine the net load that can be lifted.
6. Rated loads are based on
freely suspended loads.
Always position the boom
tip directly over the load
before lifting. No attempt
shall be made to push
down with the boom or
move the load sideways in
any direction by pulling or
dragging the load.
7. The user shall operate at reduced ratings to allow for
adverse job conditions such as soft or uneven ground,
high winds or erratic operation which produce swinging
(side) loads, experience of personnel, two machine lifts,
or other hazardous conditions for safe operation.
8. When boom length or radius or both are between points
listed on load chart, the smallest load shown at either the
next larger radius or boom length shall be used.
9. Do not exceed jib capacities at any reduced boom
length. If Jib is between angle ratings on load chart, the
smallest load shall be used.
10. Its safe to attempt to telescope or retract any load listed
if rating is not exceeded. Capacities at retracted boom
length cannot be telescoped without exceeding ratings.
11. Always pay out loadline before extending boom to avoid
damaging loadline or crane structure.
12. Loads lifted must be within safe hoist capacity as well as
safe crane capacity. Multiple part rope reeving must be
used on loads exceeding hoist single part rated pull. Jibs
are rated for single part use only.
13. Do not operate the boom over personnel or allow them
to walk or stand beneath the boom or load.
14. Do not allow personnel on truck bed or crane frame area
when operating crane.
15. Do not allow personnel to ride on hook, hook block, load
or any device attached to the loadline. Use only National
Crane approved baskets.
16. Operate controls slowly and smoothly to avoid damage
to crane or personnel.
17. Boom must be in carrying rack and outriggers fully
retracted for travel.
18. Do not operate crane within 10 feet (3.05m) of live power
lines.
Definitions
Load Radius
Horizontal distance from the centerline of rotation before
loading to the center of the vertical load line or block with
load applied.
Loaded Boom Angle
Loaded boom angle is the angle between the first section
boom and the horizontal, after lifting the rated load at the
rated radius. The boom angle before loading should be
greater to account for deflections. The loaded boom angle
combined with the boom length give only an approximation
of the operating radius.
Working Area
Area measured in a circular arc above the center line of
rotation as shown on the Working Area diagram. If no decal
is present the work areas 360°.
Block
+
Sling
+
Load
Total Rated
Load
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