EATON
WSB11206 WCSB Tensioner / Brake with ORB Coolant Ports Installation, Operation and Maintenance Manual E-CLCL-II009-E
August 2015
22
WCSB tensioner / brake with ORB coolant ports
4.4
Friction Material Replacement
Note: When replacing friction material, it is recommended that
the mating wear surface be replaced or machined flat to ensure
good contact between the mating surfaces. See Table 7
for wear limits.
4.4.1 Refer to Section 6.0 for the appropriate friction disc
replacement part numbers.
Caution
Use only genuine Airflex friction material.
Use of material not of Airflex origin may result in
unpredictable performance.
4.4.2 Disassemble the WCSB tensioner / brake assembly
per Section 4.3.
4.4.3 Remove old screws and remove and discard the old
friction material.
Note: Use of a pinpoint torch to heat the screws and soften the
Loctite
®
will ease removal of the screws.
4.4.4 Clean all burrs, corrosion etc. from the friction disc
core or mounting surface.
4.4.5 Position the friction material to align the screw holes.
Apply Loctite
®
#262 to the screw threads and
tighten the screws to the proper torque value.
For water-cooled disc assemblies, tighten screws
to 15 ft.-lb (20 nm). Screws securing the air cooled
brake friction discs (118) or blocks mounted on
the pressure plate (13) and end plate subassembly
(117) should be tightened to 20 ft-lb (27 nm) after
application of Loctite
®
#262 to the screw threads.
Install the screws in an even, cross- wise pattern.
Screws in friction blocks should be installed from the
centermost position in the block, then progressing
towards the outer edges of the block. One at a time,
install and torque each screw immediately after
application of Loctite
®
, then proceed to the next
screw.
Warning
Loctite
®
may cure prior to properly tightening the
screw if not tightened to the proper torque value
immediately after installation.
Caution
Use only Airflex-supplied screws.
Caution
Loctite
®
#262 must be shaken prior to application.
Caution
Loctite
®
#262 may irritate sensitive skin. Refer to the
product label for proper safety precautions.
4.4.6 36WCSB and 48WCSB friction disc assemblies (7)
require that the friction material be machined flat
after assembly, to allow for even contact and
minimize wear-in. Attach the friction blocks (8) to
one side of the disc core (9) and machine the to
748" (19 mm) +/- .010" (,25 mm). Install the friction
blocks to the opposite side of the disc core and
machine those friction blocks to make a thickness of
2.25" (57,15 mm) for the entire friction disc assembly.
The flatness specification is 0.010" (0,25 mm) and
the parallelism specification is 0.010" (0,25 mm) for
the entire friction disc assembly. The perpendicularity
specification is 0.010" (0,25 mm) from the disc blocks
to the spline of the disc core.
Warning
Use appropriate safety equipment and dust collection
systems when machining friction material.
4.4.7 After replacement of friction material,
re-assemble the WCSB tensioner / brake assembly
per Section 4.9. Observe wear-in procedures during
start-up per Section 3.0, Operation.
Summary of Contents for Airflex WSB11206
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