WCB 11060 (PDF Format)
13
© Copyright Eaton Corp., 1998. All rights reserved
June, 1998
For proper cooling of the WCB
tensioner, it is required that the
coolant inlet be located at the
6 o’clock position and the outlet be
located at the 12 o’clock position.
This will assure that all coolant
cavities are filled and will prevent
overheating. Refer to Figure 4 & 5.
For operation in subfreezing
temperatures, ethylene glycol
antifreeze must be added to the wa-
ter. The antifreeze content of
the mixture is critical and should not
exceed 50% by volume since
excessive amounts will reduce
cooling capacity and can cause
coolant leakage due to overheating.
Refer to Section 2.5 and Table 7.
3.2
Pressure and Speed Limits
3.2.1
Maximum applied air pressure is 150 PSIG
(10.3 bar). Maximum water pressure
measured at the inlet of the tensioner is
45 PSIG (3.1 bar).
3.2.2
Maximum slip speeds and (free wheeling)
disc speeds are shown in Table 9.
Excessive slip speeds will result
in rapid friction material wear. For
good life, the values in Table 9
should not be exceeded.
A minimum wear in period of
four hours at 50% of the rated
horsepower is recommended for
the friction couple to achieve
rated torque.
3.3
Periodic Maintenance
3.3.1
Periodically check for air leakage in the area
of the cylinder seals (21,23). For replace-
ment, refer to Section 4.0 MAINTENANCE.
3.3.2
P e r i o d i c a l l y o b s e r v e t h e f r i c t i o n d i s c
a s s e m bly(s) with the brake released.
Dragging friction discs may be caused by
wear or contamination at the gear-friction
disc core contact areas or misalignment.
3.3.3
Pneumatic and electrical control interlocks
should be periodically checked for correct
settings and operation.
3.3.4
Periodically remove the brass plug (105) or
lowest air line from the cylinder and drain any
accumulated water.
4.0
MAINTENANCE
Before doing any maintenance work
on the WCB unit, make sure that the
machinery will remain in a safe posi-
tion. Failure to do so could result is
serious injury or possibly death.
Only qualified maintenance person-
nel should install, adjust or repair
these WCB units. Faulty workman-
ship will result in unreasonable
exposure to hazardous conditions or
personal injury.
Table 9
Maximum Disc Speeds
Size
Max. Slip Speed
RPM
Max. Disc Speed
RPM
18WCB
955
1600
24WCB
715
1200
36WCB
475
700
