Product Manual

13
Figure 14
(dual fall model shown)
5. Keep tension on both sides of the chain and
lower the load hook to pull the new chain
through the hoist. Do not let the chain twist or
bind as it is being pulled through the hoist.
6. Stop hoist when 1 to 2 feet of new chain
remains on the slack side.
7. Install the spring and chain stop on the slack
end of the new chain.
8. Remove C-link. Remove the load hook and the
spring from the old chain, and install them on
the new chain. Inspect condition of both spring
and hook.
9. Lower load hook until the limit switch stops
hoist movement. Inspect the chain for any
signs of twist.
10. Install chain container following the
instructions in this manual. Do not fill chain
container by hand.
11. It is recommended that after installing new
chain, the first few lifts be limited to no more
than 25-50% of the rated load. Thoroughly
inspect chain for twist before placing hoist in
routine service.
11.3.4 Vertical and Horizontal Links
Vertical and horizontal are determined from the
relationship with the load sprocket. Vertical links
will be guided by the center slit in the load
sprocket. Horizontal links will engage in the oval
pockets on the sprocket. See Figure 15.
11.3.5 Dual Fall Chain Hoists
The link on the load side end
must be a vertical link. If it is a horizontal link,
the chain will have a twist in it.
1. Lower hook until only 1 to 2 feet of slack chain
remains in the chain container.
2. Remove chain container.
3. On the slack side of the chain, remove chain
stop, and remove the spring(s). (see Figure
13). Keep these handy for later re-installing.
4. Using a C-link(s), connect the new chain to the
old chain. If the end link of the old chain is
horizontal, use two C-links. If the end link of
the old chain is vertical, use one C-link See
Figure 15. Using the correct number of C-links
will properly orient the chain, and ensure that
first link on load side end is a horizontal link.
Figure 15
5. Install the spring(s) and chain stop on the
opposite end of the new chain.
6. Support the load hook so that the load chain
can pass through the chain sheaves smoothly.
7. Press the DOWN button to move the chain
through the hoist. Keep tension on the chain
as you pull it through to the load side, until the
C-link(s) clears the hoist at the load side.
8. Feed the new chain through the load hook.
9. Remove the clevis pin from the suspension
block (#48, page 16), and remove old chain.
10. Remove C-link and connect end of new chain
to suspension block, using the clevis pin and a
new cotter pin to secure it. Do not substitute
any other pin or bolt in this application.
NOTE: Be sure that there is no twisting of
chain between last chain sprocket in the hoist
and the suspension block.
11. Install chain container following instructions in
this manual. Do not fill chain container by
hand.
12. Lower hook until limit switch stops hoist
movement, then raise hook until limit switch
stops hoist movement. Inspect chain for any
signs of twist and correct before continuing.
13. It is recommended that the first few lifts be
limited to no more than 25-50% of the rated
load. Inspect chain for twist before placing
hoist into routine service.