EATON
Torque Limiting Coupling Installation, Operation and Maintenance Manual E-MEQD-II002-E September 2015
14
4.2
Removal of element assembly and drum
Warning
Prior to removal of the TLC, make sure the mill is
stopped and will remain in, a safe condition by
following the required ”lock-out-tag-out” or other
site specific safety procedures.
4.2.1
Match mark the element to the spider and the drum
to the drum hub.
4.2.2
Disconnect the element from the spider and allow it
to rest on the drum.
4.2.3
Disconnect the axial locking device from the spider
and separate the (motor and pinion) shafts as far as
the bearings will allow.
4.2.4
Connect an inspected and approved overhead
support that exceeds the required weight to be lifted
to the element and apply enough tension to support
the weight of the element and drum.
4.2.5
Remove the fasteners attaching the drum to the
drum hub and hoist the element/drum out from
between the shafts. Take special care when hoisting
the element/drum from between the shafts, as the
axial locking device mounting plate binds easily
against the spider face.
Caution
Use extreme care when disconnecting the
drum from the hub. Shear points exist at the
mounting holes.
4.3
Removal of spider and drum hub
4.3.1
Removal is not necessary for routine TLC
maintenance. Removal may only be needed if access
is needed to the motor shaft, pinion shaft, or gearbox
shaft where these components are located.
4.3.2
Puller holes are provided for removal if these must
be removed. It will require heating of the spider and
drum hub along with the pressure supplied by a
properly located puller attached to the component to
be removed. When heating, use torches with
rosebud tips. Heat the component uniformly to
prevent hot spots and do not exceed 275°F (135°C).
Torque Limiting Coupling
4.4
Disassembly of the element
4.4.1
Lay the element flat on a clean work surface.
4.4.2
Remove one of the side plates and inspect the
surface that the friction shoes contact for any
unusual wear patterns, especially look at the
end scallops on the side plates and check for
excessive wear.
4.4.3
Remove the friction shoe assemblies, torque bars
and release springs. If the torque bars and springs
come out of the element with the friction shoe
assemblies, carefully tap them out of the backing
plate cavities. Note any wear and replace in sets as
necessary. See table X.
Caution
Whenever the element is removed and
disassembled, it is always good practice to
replace the release springs.
4.4.4
Remove the air connection QRV's and spiral snap
rings which secure the air actuating tube to the rim.
Carefully remove the air actuating tube from the rim
and thoroughly inspect. Replace if necessary.
See Figure 10.
4.4.5 Remove the remaining side plate only if it is
to be replaced.
4.5
Friction shoe assembly replacement
Caution
Use only genuine Airflex replacement parts.
Use of replacement parts not of Airflex origin
will void all warranties.
4.5.1
Make sure the torque bars and release springs
have been removed from the backing plates.
3
Snap Ring
Figure 10
