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WCSB tensioner / brake with ORB coolant ports
2.2.8
While supporting the WCSB tensioner / brake
assembly, connect an air supply to the cylinder (19)
and apply adequate pressure to release the WCSB
tensioner / brake assembly. Attach the mounting
flange (2) to the mounting surface using the
appropriate fasteners. Tighten the fasteners to the
specified torque value. See Table 2. Exhaust the air
from the cylinder after tightening the fasteners.
Caution
Maximum allowable air pressure in the cylinder (19)
is 150 psig (10.2 bar).
2.2.9
Some WCSB tensioner / brake assembly (typically 3
and 4 disc assemblies) require an additional support
bracket to minimize torsional deflection during
operation. Refer to the appropriate assembly drawing
for bracket recommendations. The bracket, when
required, will fit over the sleeve nuts (106) located on
the studs (6) closest to the 6 o'clock position. Secure
the bracket onto the sleeve nuts with flat washers
(17) and locknuts (18). Tighten the locknuts to the
value listed in Table 2. Shim the base of the support
bracket as required. Install and tighten fasteners as
required to secure the bracket into position.
Warning
Ensure that the support bracket does not interfere
with or bind on the cylinder (19). Interferences
could prevent the WCSB tensioner / brake assembly
from properly engaging or releasing.
2.2.10 WCSB tensioner / brake assembly tensioners should
be covered to protect the unit from dirt, rain, overspray,
and other sources of external contamination. In
extreme environments the use of a sealed enclosure
with internal strip heater is recommended to prevent
moisture from collecting on the unit.
2.3
Air System
Warning
Operation of the WCSB tensioner / brake assembly
at pressures exceeding those specified in Section 3.2
may result in damage to components.
Caution
Minimum releasing pressure for the spring set
brake should be observed. Operation at pressures
below minimum will result in WCSB tensioner /
brake assembly drag, excessive heat and wear, and
damage to brake components.
Caution
When applying operating pressure to only one of
two ports on units with dual pressure pistons (33),
the second piston pressure port must be open and
EATON WSB11206 WCSB Tensioner / Brake with ORB Coolant Ports Installation, Operation and Maintenance Manual E-CLCL-II009-E August 2015
vented to atmosphere. Porting should be filtered to
avoid contamination of the piston / cylinder during
single piston actuation.
2.3.1
Maximum allowable pressure is 150 psig (10.2 bar) in
the spring set brake cylinder (19), and 150 psig
(10.2 bar) in the air applied mounting flange / cylinder
(112). See Section 3.2 for other limitations.
2.3.2
Use only clean, filtered air (a 50 micron filter or better
is recommended) which is free of excess moisture.
Exhaust porting in dual pressure piston / cylinders
should also be filtered to avoid contamination when
open to atmosphere during single port actuation.
2.3.3
Air inlet sizes are shown in Table 3. Air inlets for the
spring set brake are on the face of the cylinder (19).
Air inlets for the air applied tensioner (radially located
in the mounting flange) should be located at or near
the 6 o'clock position to facilitate purging of moisture
that may accumulate in the air system.
Table 3
Actuation Port Sizes
Cylinder
Mounting Flange
Size
(3 ports)
(Small Piston)
24WCSB
1/2"-14 NPT
1/4"-18 NPT
36WCSB
3/4"-14 NPT
3/8"-18 NPT
48WCSB
1"-11.5 NPT
1/2"-14 NPT
2.3.4
All pipes should be free of metal chips, cutting
compound and any other foreign matter. Pipe ends
should be reamed after cutting to eliminate
possible restrictions. For optimum air system
response, a minimum number of bends and elbows
should be used.
2.3.5
The final connection to the brake inlet ports on
the cylinder (19) must be made with flexible hose.
If using only one inlet, connect the hose to the
lowest position.
2.3.6
The WCSB tensioner / brake assembly does not
require lubricated air; however associated control
valves may. Consult the valve manufacturer for
appropriate recommendations.
MountingFlange
(Large Piston)
1/2"-14 NPT
3/4"-14 NPT
1"-11.5 NPT
9
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