Full Product Manual

1413
FIG 10
FIG 11
LOAD CHAIN INSPECTION
Over time, the load chain will wear or elongate. This can cause
damage to the hoist, breakage, or non-engagement of the load
sheave.
To inspect the load chain for wear:
1. Test the hoist under load in both the lifting and lowering direc-
tions, observing the operation of chain and sprockets. Chain
should feed smoothly into and away from the sprockets.
2. If the chain binds, jumps, or is noisy, make sure it is clean and
properly lubricated. If the trouble persists, inspect the chain and
mating parts for wear, distortion, or other damage.
3. Clean the chain before inspection. Examine for gouges, nicks,
weld splatter, corrosion, and distorted links. Slacken the chain
and move adjacent links to one side, looking for wear at the
contact points. If you see wear or suspect stretching, measure the
chain as explained in FIG 15. If chain matches or exceeds the limit
shown in the table, replace the load chain before using the hoist.
• Select an unworn, unstretched length of chain (i.e. at the
slack end).
• Suspend the chain vertically under tension and, using a
caliper type gauge, measure the outside length of several links
about 12 to 24 inches.
• Measure the same number of links in used sections and
calculate the percentage of the increase in length.
4. If the length of used chain exceeds 2-1/2 percent of the unused
chain, replace the chain. (See “Load Limits” on FIG 15 for specific
link measurements.)
WARNING : Do not operate the hoist with a twisted, kinked or
damaged load chain. Do not splice load chain. Check the chain for
excessive wear or stretch. Failure to comply may cause serious injury.
WARNING : Do not add to the load chain. Replace entire chain.
Failure to comply may cause serious injury.
LOAD CHAIN REMOVAL
Remove the old load chain as follows while referring to FIG 11
1. Remove the cotter pin (A) and the chain anchor pin (C) on the
chain anchor (D), allowing the end of the chain to fall free.
2. Pull the hand chain (FIG 5) until load chain is completely
removed from gear assembly.
Referring to FIG 11:
4. Insert one end of chain link (B) into chain anchor (D).
5. Insert the chain anchor pin (C) through the chain anchor (D) and
chain link (B) and secure with the cotter pin (A). Continue to Chain
Installation that applies to your hoist.
Continue with Load Chain and Bottom Hook Installation on the
following page, proceeding to the section that applies to your
hoist: 1/4 to 2-Ton hoists, 3 to 5-Ton hoists, or 10 to 20-Ton
Hoists.
ATTACHING LOAD CHAIN TO LOAD CHAIN SPROCKET
(ALL MODELS)
Install new load chain onto load chain sprocket as follows, refer-
ring to FIG 10:
1. Position the load chain sprocket (E) by rotating hand chain
wheel (F) so that the wide and narrow grooves show.
2. Insert the load chain into the sprocket grooves so that chain will
wind up and back over the sprocket. Welds must face away from
the sprocket.
3. Rotate hand chain wheel so that load chain falls six to eight
inches at back of sprocket.