Coffing Hoists EC Series, Руководство по эксплуатации, техническому обслуживанию и каталог запасных частей

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10
P/N EC680-7 April 2017
Order # 5041558-0 & 5041679-0
SECTION III OPERATION
3-1. GENERAL
This section presents information concerning the proper operation
of the Coffing Electric Chain Hoist. It is not intended to serve as
a handbook on rigging. Rigging, the process of moving heavy
loads using mechanical devises, requires special knowledge and
equipment. For information on the safe use of slings and similar
rigging gear, users are urged to consult a textbook on rigging.
3-1. SAFETY NOTES
a. Inspect the hoist for any sign of loose, broken, or
malfunctioning parts (see Section IV). Any malfunctioning hoist
should be tagged as “out of order: and removed from service
until the defect is corrected.
b. Before starting the hoist, the operator should be certain that all
personnel are clear.
c. Do not lift more than the rated load of the hoist.
d. Do not lift people or loads over people.
e. Avoid jogging controls or quick reversals of suspended loads.
f. Do not leave a suspended load unattended.
g. The operator should have a clear view of the load anytime it is
moving and should be sure that the load does not contact
any obstructions.
h. Read ASME B30.16 Safety Standard for Overhead Hoists.
3-3. HANDLING THE LOAD
a. Align hoist directly over load. Avoid side pull.
b. The hoist chain should not be wrapped around the load. Use
proper slings.
c. Be sure there are no twists in the load chain as it enters the hoist.
This condition should be constantly checked on double or triple
chain hoists because it is possible for the load block to be
“capsized” or flipped over one or more times, putting twist in
the chain. The presence of twist may not be obvious when the
hook block is in the lowered position but can cause serious chain
binding when the hook block is in its filly raised position.
d. Bring the hook into engagement with the load and make
sure it is well seated before proceeding to lift the load. On
multiple reeved hoists, be sure that the load is equalized on all
supporting chains.
e. Lift the load just clear of its supports and stop the hoist to
check for proper brake operation.
f. Avoid letting the hook or load swing excessively while moving a
trolley suspended hoist.
3-4. OVERLOAD LIMITING PROTECTION
This hoist is equipped with a factory-calibrated overload limiting
clutch. While the overload limiting clutch will protect the hoist from
damaging overloads, it will not ensure that a load is within the rated
capacity of the hoist. If the load exceeds the lifting capability of the
overload clutch, the hoist will not lift the load, but the motor will
continue to run as long as the “UP” button is pressed. Repeated
attempts to lift an excessive load will overheat the overload clutch
and cause permanent damage to the clutch.
The overload limiting clutch is an emergency protective device
and should not be used to measure the maximum load to be
lifted, or to sense the overload imposed by a constrained load.
While the overload limiting clutch will protect the hoist from
damaging overloads, it will not ensure that a load is within the
rated capacity of the hoist.