2-14
If there is a malfunction of the RCL or Anti-Two-Block system that causes loss of boom
movement and cannot be remedied by the procedures above, the override keyswitch
under the dashboard may be required to move the boom.
W A R N I N G
We recommend the CANCEL button and emergency override switch be used with
discretion. Improper or careless use of these switches can cause damage to the
crane and endanger people and property. The operator who uses these overrides
in an emergency should use good judgment.
There is a light on the dashboard to worn that one or more outriggers is not fully out (e.g.
above horizontal). Check the light daily when the outriggers are down and there is no
load on the hook. Raise each outrigger above horizontal, then lower. The light should
come on when an outrigger is above horizontal.
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.
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. Please read the RCL Operation Manual.
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.
Be aware that 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. The person responsible for lifts must
establish procedures for determining load weights and radii and conduct the lifts
according to the second paragraph of CRANE CAPACITY above.
Courtesy of Crane.Market
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