Product Manual

12
9. Lower load at destination. If both UP and
DOWN commands must be used during
lowering, pause for a moment between each
reversal of load direction.
10. Slowly allow weight to shift from hoist to
ground or new support. Do not approach load
until all tension is out of chain and load is
stable.
11.0 Maintenance
11.1 Brake Inspection
Keep brake surface and lining
free of grease.
1. Remove load and disconnect hoist from power
source.
2. Remove the back frame cover (index #31,
page 16).
3. Check for worn brake disc by measuring the
brake air gap with a feeler gauge (Figure 11).
A brake gap larger than the allowable wear
limit – 0.039” - may cause chatter or failure to
release.
4. If the brake is not operating properly, the
entire brake assembly must be replaced by
qualified service personnel.
Figure 11
11.2 Lubrication
The gear housing has been filled with 1/2 pound of
grease at the manufacturer and should not require
attention. If future lubrication becomes necessary,
use approximately 3/4 cup of a light semi-fluid
NLGI #1 grease.
Wipe the chain clean with a cloth periodically and
apply a light coat of SAE 90 gear oil.
11.3 Replacing Load Chain
Over time, the load chain will wear or elongate.
This can cause damage to the hoist, breakage, or
non-engagement of the load sheave. The following
procedures describe replacing the load chain for
single and multiple fall hoists. These procedures
should be performed by experienced personnel
only.
11.3.1 How to Cut Chains
Use a bolt cutter with special cutter jaws for cutting
hardened chain. Cut only one side of the link at a
time. When making the second cut, place a mat
over the chain to catch the flying chain section.
11.3.2 Making a C-Link
Replacing load chain will require the use of a C-link
(in some cases, two C-links), which you can easily
make as follows:
1. Cut a link from the old chain.
2. Cut the weld from the link leaving an opening
approximately 1.25 times the diameter of the
link material. See Figure 12.
3. Grind the cut areas smooth and remove all
burrs.
Figure 12
11.3.3 Single Fall Chain Hoist
1. Lower the load 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 old chain, remove the
chain stop and the spring (Figure 13). Keep
these handy for later re-installing.
Figure 13
4. Using a C-link, connect the new chain to the
old chain. Be sure vertical link welds face
away from load sprocket (see Figure 14).