Idiomas disponibles
Idiomas disponibles
Attachment of loads
Check the equipment well before use. Improper attachment of loads can be highly dangerous (see Figs. 4 a–e).
Only use straps and slings of sufficient load capacity. Make sure the load is not anchored to the floor/ground or is otherwise fixed before
making the lift.
Lifting/pulling
With the selector in position UP, operate the lever to tighten the chain. Check for safety before lifting the load to the desired position. If the load is
too light to be lifted, hold onto the brake wheel so you hear the snapping sound. You will then be able to lift the load with just one hand. If the lever
is released while lifting, the load will be held in its current position by the reaction brake. The lever hoist can also be used for pulling and fixing
loads.
Fig 4 a
The sling is applying
load to the hook tip!
Further safety precautions
•
Never lengthen the lifting lever with a pipe or similar. Use only hand power on the lever. If the load seams too heavy, use a bigger lever hoist
or reduce the load.
•
Make sure no-one stands beneath a hanging load.
•
Do not raise or lower so far that the load hook or the stop eye hits the block housing.
•
Do not set the selector to neutral under load.
•
The block must not be subjected to dynamic stresses, for example where a load connected to the block is launched from a height.
•
Do not leave a block with a suspended load unattended.
Lowering
With the selector in DOWN position, operate the lever to lower the load. Wait until the chain has been completely freed of load before moving the
selector to Neutral (N) to rapidly pull out the chain. (See "Pulling through the unloaded chain" page 2).
Multiple lifting
Multiple lifting presents special risks. This is when two or perhaps more hoists are used simultaneously for the same load. Danger to persons and
material damage can arise due to dynamic stresses and uneven load distribution causing individual hoists to become overloaded. A competent
person with experience in multiple lifting must therefore supervise this type of lifting tasks.
The total weight of the target object and its load distribution must be known or calculated.
For a variety of reasons, the centre of gravity can be difficult to determine, and thus so will the distribution of the load each hoist must bear. In
cases where heavy, bulky loads must be handled and it is not possible to estimate all factors correctly, the max working load limit (WLL) of each
hoist must be reduced by at least 25%.
Daily checks
After every working day on which the lever hoist has been used, the following should be checked:
•
Is the lever hoist deformed or otherwise damaged? Are any parts missing?
•
Is any deformation or other damage visible on the suspension device (eye, shackle, bolt or similar)?
•
Are the hooks intact or have any hooks opened? Are the hook latches correct and functional?
•
The selector must work without problems.
•
Wipe down the lever hoist and oil the chain as required.
•
The chain must be undamaged, i.e. no signs of wear and no deformed or otherwise damaged links.
•
The chain must not be kinked or twisted. With 2-fall lever hoists (6 t), there is a risk of the chain twisting if the bottom hook assembly ends up
looped through the chain sling – usually during refitting or moving the hoist between work stations. See Fig 5.
•
The chain stop must free of deformation or other damage.
•
The brake function must be intact.
In the event of faults or failures, the hoist must be repaired and carefully checked by a specialist before reuse.
Continuous maintenance - lubrication
Oil the hook latches and bearings. Grease the pawl and ratchet and also the gear. Lubrication must be sparingly and carefully applied so no
grease gets on the brake disk. Oil the chain for longer life.
Periodic checks
Periodic checks are normally carried out yearly to detect and remedy any faults. If required (e.g. high frequency of use), more frequent checks
may be carried out. See "Checklist for periodic checks". Measure hooks and chain to detect any changes in shape.
Fig 4 b
Excessive top
Hook latch obstructed!
angle on sling!
α maks. 60°
Fig 4 c
Fig 4 d
Hook tip subject to
additional bending stress!
3
Fig 4 e
Load chain must not
be used as a sling!
