EATON
WCB11070.1
Brake Assemblies Installation, Operation and Maintenance Manual
E-CLCL-II015-E
December 2016
8
WCBD Brake Assemblies
2.0 INSTALLATION
2.1
Preparation and Alignment
2.1.1 The preparation and alignment of the WCBD brake
assembly is identical to that of the WCB2 tensioner/
brake. Refer to IOM WCB 11070 for preparation and
alignment procedures for the WCBD brake assembly.
2.2 Mounting
2.2.1 Mounting of the WCBD brake assembly is identical
to that of the WCB2 tensioner/brake. Refer to IOM
WCB 11070 for mounting procedures.
2.3
Air System
Warning
Maximum allowable air pressure to any WCBD
brake assemblies pressure port is 150 psig
(10.2 bar). Application of pressure exceeding
maximum allowable may result in damage to the
WCBD brake assembly.
2.3.1 Maximum allowable pressure is 150 psig (10.2 bar).
2.3.2 Use only clean, filtered air (a 50 micron filter or better
is recommended) which is free of excess moisture.
2.3.3 Air inlet sizes are shown in Table 2. Air inlets are
located on the face of the cylinder (19). Some
cylinders will have a single port to facilitate purging
of moisture that may accumulate in the air system or
cylinder. This lowest port should be located at or near
the 6 o’clock position.
Table 2 Air Inlet Sizes (NPT)
Small Cylinder
Large Cylinder
Size
(Inner Ports)
(Outer Ports)
8WCBD
3/8"-18 NPT
3/8"-18 NPT
14WCBD
3/8"-18 NPT
1/2"-14 NPT
18WCBD
3/8"-18 NPT
1/2"-14 NPT
24WCBD
3/8"-18 NPT
1/2"-14 NPT
36WCBD
3/8"-18 NPT
3/4"-14 NPT
48WCBD
1/2"-14 NPT
1"-11.5 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 elbow should be used.
2.3.5 The WCBD brake assembly does not require
lubricated air; however associated control valves
may. Consult the valve manufacturer for
appropriate recommendations.
2.4
Coolant System
2.4.1 Installation and operation of the WCBD brake
assembly's coolant system is identical to the WCB2
tensioner/brake. Refer to Eaton manual WCB 11070
for cooling system procedures and parameters for
the WCBD brake assemblies.
3.0 OPERATION
3.1
Conditions of Operation
3.1.1 With the exception of the dual cylinder/piston power
head (Section 3.1.2, below), operation of the WCBD
brake assembly is identical to operation of the
WCB2 tensioner/brake. Refer to Section 3.0 of IOM
WCB 11070 for conditions of operation of the WCBD
brake assembly.
3.1.2 When applying operation air pressure to only one
of the two WCBD brake assemblies piston pressure
ports (item 19), of the dual piston configuration, the
second piston pressure port must be open/vented
to the atmosphere, with a filter installed in the vent
line, as appropriate, to avoid contamination by foreign
objects into the cylinder during piston operation.
4.0 MAINTENANCE
Note: Refer to WCB2 tensioner/brake manual WCB 11070 for
maintenance of the WCBD brake assembly, with the exception of
Section 4.1, which covers cylinder seal replacement. WCBD brake
assembly cylinder seal replacement is covered in this manual.
4.1
Dual Cylinder Seal Replacement
4.1.1 Disconnect the air connections
4.1.2 While supporting the cylinder, loosen the locknuts
(18) ONE TURN AT A TIME and in an alternating
(crosswise) pattern until the spring force is
completely relieved. Remove the locknuts and
washers (17). Deep well sockets are required for
removal of the locknuts.
4.1.3 Using lifting equipment, carefully remove the cylinder
(19) and piston (33) as an assembly. Set aside in a
clean area.
