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7.1 - REPLACING THE BRAKE LININGS
1- Remove the three screws, chain wheel flange
side
2- Remove the chain wheel case
3- Remove the split pin from the castellated nut
4- Remove the chain from the chain wheel
5- Unscrew the chain wheel
6- Remove the ratchet sub-assembly and the two
linings
7- Remove the brake plate
7.2 - CLEANING
- Using a wire brush, clean :
. the threaded section of the cog shaft
. the brake plate
. the threated bore of the chain wheel
- Clean the brake plate
- Change or degrease the linings
7.3 - REASSEMBLY
1- Refit the brake plate and completely tighten the
bolts whilst exerting upward pressure on the shaft
2- Fit the first lining.
3- Slightly separate the two pawls an fit the
ratchet
4- Ensure that the two pawls are both correctly
positioned in the teeth of the ratchets
5- Fit the second lining
6- Bolt on the large chain wheel, machined face
towards linings
7- Completely tighten the bolt, lining up the split
pin hole with a castellation
8 - Fit the split pin and bend both ends
9 - Refit the chain on the chain wheel
10 - Fit the chain wheel case, use a large
screwdriver to ease the fixing tabs over, line up
the three tabs with the holes on the flange
11 - Fit and tighten the 3 screws
12 - Test the brake under load conditions
8. CHECKS
Check the condition of the chain regularly, it
should be changed immediately if any of its links
are cracked or deformed. Link wear must not
exceed 10 % of the diameter of the steel.
Dimension X depends on chain type (new chain).
All checks must be carried out by a qualified
person. We recommend that you number each
hoist and keep a maintenance register.
Setting up the chain :
- Take a flexible electric wire of about 50 cm.
- Insert it into the aluminium chain-guide and push
until it comes out on the other side of the chain-
guide.
- Hook the chain onto the end of the wire on the
load side.
- Pull the wire to bring the chain in contact with
the sheave (at the same time check its position :
the soldering of the vertical links must be on the
inside).
- Fix the end-of-run stop ensemble correctly.
9. DECOMMISSIONING - DISMANTLING -
SCRAPPING
If the equipment is decommissioned, remove the
used grease for appropriate disposal before
scrapping.
10. INSTRUCTIONS FOR EMERGENCY
SITUATIONS
Stop the lifting manoeuvre if the brake shows any
sign of slipping and have the installation checked
by the maintenance department.
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