Columbus McKinnon Yale AL 750 Traduction De Mode D'emploi page 24

Maintenance of the load chain
In most cases, chain wear in the link points is caused by insufficient care of the chain. In order
to ensure optimal lubrication of the link contact points, lubricate the chain at regular intervals
adapted to the application with creep-type lubricant (e.g. gear oil). A dry film lubricant, e.g.
PTFE spray, should be used in environments where abrasives like sand, etc., occur. The
service life of the load chain can be increased by careful lubrication to 20 - 30 times compared
with a chain that is not serviced.
• When lubricating the chain, make sure the chain is in no-load condition so that the oil can
reach the contact points of the chain links which are subject to wear. Chain link parts
contacting each other must always be coated with lubricant, otherwise increased wear on the
chain results.
• It is not sufficient to lubricate the chains on the outside as this does not ensure that a
lubricant film can build up in the contact points.
• With a constant lifting path of the chain, the change-over area from lifting to lowering
movement must be checked in particular.
• Make sure that the load chain is lubricated over its entire length, also including the part of the
chain in the housing of the hoist.
• Clean dirty chains with petroleum or a similar cleaning agent, never heat the chain.
• When lubricating the chain, also check the chain for wear.
ATTENTION: It must be ensured that no lubricant can penetrate into the brake
enclosure. This may result in failure of the brake.
Replacing the load chain
The load chain must be replaced by a new chain of the same dimensions and quality in the
event of visible damage or deformations, however, when the discarding status has been
reached, at the latest. A load chain to be discarded must only be replaced by an authorized
specialist workshop. Only fit load chains which have been approved by the manufacturer. Non-
compliance with this specification will render the legal warranty or guarantee void with
immediate effect.
NOTE: Replacement of a load chain must be documented!
Hoist with single fall
• Only pull in the new chain in no-load condition.
• An open load chain link is required as a tool. It can be obtained by using an abrasive wheel
to cut a section from an existing link with the same dimension. The length of the cut section
must at least correspond to the thickness of the link.
• Remove load hook from the old load chain and suspend open load chain link in the loose
end of the load chain.
• Suspend the new, lubricated load chain also in the open link and pull it through the hoist unit
(turn hand wheel clockwise).
• Do not fit a twisted chain. The welds must face outwards from the chain wheel.
• When the old load chain has passed through the hoist unit it can be detached together with
the open chain link and the load hook can be fitted on the new load chain just pulled in.
• Detach the chain stop from the loose end of the old, replaced load chain and fit it to the loose
end of the new load chain just pulled in.
ATTENTION: The chain stop must always be fitted to the loose end of the chain (idle
fall).