Harrington Hoists and Cranes ER Large Capaciy Hoist - (ER1) - Manual (Page 17)

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1)
CAUTION
The hoist must be properly powered and operational in order to perform the
following procedures.
2)
WARNING
Be certain that the replacement chain is obtained from Harrington and is the exact
size, grade and construction as the original chain. The new load chain must have an odd number of
links so that both its end links have the same orientation. If the load chain is being replaced due to
damage or wear out, destroy the old chain to prevent its reuse.
3)
CAUTION
When replacing load chain, check for wear on mating parts, i.e. Load Sheave,
Chain Guides and Idle Sheaves, and replace parts if necessary.
4) For hoists without a chain container, remove the socket bolt, lock nut, and attach the no-load side of the
chain to Chain Guide A.
5) Remove the Stopper and Chain Spring from the no-load side of the chain for reuse on the new chain.
Inspect and replace any damaged or worn parts.
6) Using an open link, attach the new chain to the end link of the old chain on the no-load side. The end
link of the new load chain should be connected so that the welded portions of the load chain's standing
links are oriented to the outside as they pass over the Load Sheave. Refer to
Figure 6-3 .
7) Operate the hoist down to move the new chain though the hoist body. Stop when a sufficient amount
of new chain is accumulated on the load side.
8) Complete reeving as follows:
• For ER080S pull down on Part
‚
until new chain is fed through the upper and lower idle sheaves.
Secure the new chain at Part ‚ directly below the upper suspension plates to prevent the new
chain from running back through the idle sheaves. Remove the open link attaching the new chain
to the old chain.
• For ER100L pull up on Part ‚ until the new chain is fed through the upper and lower idle sheaves.
Secure the new chain at Part ‚ directly above the lower idle sheave to prevent the new chain from
running back through the idle sheaves. Remove the open link attaching the new chain to the old
chain.
9) Remove the Snap Ring and Chain Pin that attach the old chain to the chain holder for use on the new
chain. Inspect and replace any damaged or worn parts.
10) Connect the end link of the new chain to the chain holder with the Chain Pin and Snap Ring. Ensure
that the chain remains free of twists. Attach the remaining chain components to the chain referring to
Section 3.2 for the proper locations. For hoists without a chain container, attach the no-load side of the
chain to Chain Guide A with the socket bolt, and lock nut. See Figure 3-2.
11)
WARNING
Make sure the Stopper and Chain Springs are properly installed. Refer to Section
3.2.
12) After installation has been completed, perform steps outlined in Section 3.6 "Preoperational Checks
and Trial Operation".