2-9
There is a light on the dashboard to warn that one or more outriggers is not
fullyextended when using the “On Outriggers” setup on the RCL. Check the light daily
when the outriggers are down and there is no load on the hook by raising and lowering
each outrigger about three inches. The light should come on when an outrigger is up.
CRANE CAPACITY
Before lifting loads, the operator must read the Crane Capacity Chart and adhere to the
load capacities and radii of handling given. The information provided on this chart is
based on stability, structural strength and hydraulic capacity.
To operate the crane safely, the operator must know the weight of the load and handling
devices and the radius of the lifting operation. The crane must not be loaded beyond the
specifications of the capacity chart except for test purposes as provided in ASME B30.5
Section 5-2.2. The person responsible for the lift must be sure that the load does not
exceed the crane ratings at any radius at which the load may be during the entire lifting
operation. The weights of the hooks, blocks, downhaul weights, slings, and other
handling devices must be added with the load. Please read the RCL Operation Manual.
The Rated Capacity Limiter on the crane is intended to assist the operator in
estimating loads and measuring load radii and to alert the operator to impending
overload conditions. The use of the Rated Capacity Limiter does not replace the
requirements of the preceding paragraph. Verified weights and measured radii must
take precedence over the Rated Capacity Limiter readings.
The Rated Capacity Limiter displays a load, load radius and boom angle that are
obtained from electronic calculations using readings from pressure, length and angle
sensors. These readings cannot be exact and should be treated as estimates. In
general, the smaller the load and the higher the boom angle, the larger the percent of
error, and the electronic and mechanical components cannot be 100% fail-safe.
Do not consider the system as a substitute for good judgment, training, experience or
accepted safe operating practices. The operator is solely responsible for operation of
the crane. Setting the Rated Capacity Limiter for the configuration of the crane is
necessary before starting a lift. If incorrectly set, the system will not alert the operator to
an impending overload, possibly resulting in the loss of life or destruction of property.
If the Rated Capacity Limiter is inoperative or malfunctioning, repair or recalibration of
the unit must be done as soon as reasonably possible, and the person responsible for
lifts must establish procedures for determining load weights and radii and conduct the
lifts according to the second paragraph above.
The Rated Capacity Limiter is designed to stop crane functions that could cause an
overload or two blocking. These are: BOOM LOWER, TELESCOPE EXTEND, HOIST
RAISE, SWING LEFT and SWING RIGHT. Great care must be exercised when
handling a load near capacity or near a two-blocking condition. If the boom is being
lowered or swung, the load will tend to swing if the Rated Capacity Limiter stops the
boom movement. If the load is moving too fast, the sudden stopping by the system can
cause dangerous load swinging which can cause death or injury to personnel or property
damage by impact with the load or by the crane tipping.
Courtesy of Crane.Market
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