Harrington Hoists NER2 - Manual (Page 20)

20
Figure 6-3 Chain Replacement for 080S and 100L
6.4.3 Load Chain Replacement for ER2100S, ER2150S and ER2200S:
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 chain containers, remove the socket bolts, lock nuts, and attach the end links of the
chain to Chain Guide A on both hoist bodies.
5) Remove the Stopper and Chain Spring from one end of the old 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 where the Stopper and Chain
Spring were removed. 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 6-4 .
7)
Install the Stopper and Chain Spring to the free end of the new chain. Refer to Section 3.2 in this
supplement for the correct location.
8) Disable Hoist Body B by unplugging its 8P plug. Operate Hoist Body A in the down direction to move
the new chain through the hoist until a sufficient quantity of chain has accumulated between the hoist
bodies. Re-enable Hoist Body B by re-inserting its 8P plug.
9) Disable Hoist Body A by unplugging its 8P plug. Operate Hoist Body B in the up direction to move the
new chain through the hoist until a sufficient quantity of new chain has passed through Hoist Body B.
Re-enable Hoist Body A by re-inserting its 8P plug.
10)
Remove the open link attaching the new chain to the old chain.