Eaton Airflex WCB2 Series Installation, Operation And Maintenance Manual page 17

WCB2 Tensioner/Brake
Measure the "Y" gap between the pressure plate
(13) and the reaction plate (31), the "Y" gap between
the reaction plate (31) and the mounting flange (2),
and the "Z" gap between the reaction plates (31) as
shown in Figures 8, 9 and 10.
If the "X worn" dimension has been reached or
exceeded and the "Y" or "Z" dimensions have not
reached the limits shown in Table 10 AND none
of the friction discs are worn to the bottom of the
wear groove / step, wear adjustment is required. It
is also recommended that wear plates be inspected
to ensure that the wear limits listed in Table 13 have
not been exceeded.
Warning
If wear adjustment is not made, the piston may
extend out of the cylinder beyond an acceptable
operating range, resulting in loss of torque and/or
seal damage.
If the "Y" or "Z" dimensions have been reached or any
of the friction discs are worn to the bottom of the
wear groove (or step), the WCB2 tensioner/brake
assembly should be taken out of service and rebuilt
with new components as required.
Y
2
31
Y
2
EATON WCB11070 WCB2 Tensioner/Brake Installation, Operation and Maintenance Manual E-CLCL-II016-E December 2016
31
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Y X
Figure 8
Z Y X
Figure 9
Y
2
4.2.2 Adjustment Procedure
Wear adjustment can be conducted without full
disassembly of the WCB2 tensioner/brake assembly.
The wear adjustment spacers are slotted to allow for
easy removal with a chisel.
Warning
Before performing any maintenance work on the
WCB2 tensioner/brake assembly, make sure that the
machinery will remain in a safe position. Failure to do
so could result is serious injury or possibly death.
Note: It may be necessary to disconnect air and water supply
lines to prevent damage to the hoses and binding of components
during the adjustment procedure.
4.2.2.1 Wear spacers should be removed in complete sets
only (one from each stud location). Mark the spacers
to be removed to avoid confusion during removal.
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Warning
Removal of spacers in quantities other than complete
sets (layers) will result in severe damage to WCB2
tensioner/brake assembly's components during
reassembly, and could cause the WCB2 tensioner/
brake assembly to not function properly.
4.2.2.2 If so equipped, remove the support bracket from the
cylinder (19) end of the unit.
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4.2.2.3 Loosen the locknuts (18) evenly (ONE TURN AT
A TIME) and in an alternating (cross wise) pattern
to prevent binding of the cylinder on the studs.
Continue to loosen the locknuts until the force of
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the release springs is relieved, allowing for access to
the wear spacers. It may be necessary to push the
pressure plate and reaction plate(s) away from the
mounting flange so that the release springs can be
moved to gain access to the wear spacers.
31
Z Z Y X
Figure 10
19
13
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