EATON
WCB11076.1 WCBD Brake Assemblies with ORB Coolant Ports Installation, Operation and Maintenance Manual October 2014
10
WCBD Brake Assemblies with ORB Coolant Ports
4.1.15 Lubricate the threads on the end of the studs with
30 wt. oil or anti-seizing compound and install the
washers (17) and locknuts (18).
4.1.16 While supporting the weight of the cylinder/piston
assembly, tighten the locknuts, ONE TURN AT A
TIME and in an alternating (cross- wise) pattern until
the cylinder is seated firmly against the clamp tubes.
Torque the locknuts to the appropriate value.
See Table 3.
Caution
The locknuts (18) must be tightened gradually to
prevent damage to the WCBD brake assembly's
components.
4.1.17 Test for proper seal installation as follows:
4.1.17.1 There are two sets of ports on the cylinder; the
outermost positioned ports connect to the larger
pressure chamber. The innermost ports connect to
the small pressure chamber. Remove any pipe plugs
or fittings from the inner ports.
4.1.17.2 Install a pressure gauge in one of the outer cylinder
ports. Apply 80 psig (5.1 bar) air through a second
outer cylinder port after plugging the other outer
NPT port to engage the WCBD.
4.1.17.3 After the pressure has stabilized, shut off the air
supply. Monitor the pressure gauge for a drop
in pressure for a period of ten minutes. If the air
pressure does not drop below 60 psig (4.1 bar) within
10 minutes, the seals have been properly installed.
If leakage is excessive, try to note the location of the
leakage. If the intermediate seal is leaking, air will
pass into the small (inner) chamber.
4.1.17.4 Exhaust all air pressure from the WCBD brake
assembly. Remove the plugs and gauges from the
outer- most ports and install them in the inner ports,
leaving all of the outermost ports open.
4.1.17.5 Apply 80 psig (5.1 bar) air pressure through one of
the inner ports in the cylinder port after plugging
the other outer NPT port to engage the WCBD
brake assembly.
4.1.17.6 After the pressure has stabilized, shut off the air
supply. Monitor the pressure gauge for a drop
in pressure for a period of ten minutes. If the air
pressure does not drop below 60 psig (4.1 bar)
within 10 minutes, the seals have been properly
installed. If leakage is excessive, try to note the
location of the leakage. If the intermediate seal is
leaking, air will pass into the large (outer) chamber.
4.1.17.7 If excessive leakage is found in testing of the
large or small pressure chamber, disassemble the
WCBD brake assembly and check the suspect seals
and sealing surfaces for damage or other causes of
leakage. Repair or replace components as required.
Table 3
Fastener Description and Assembly Torque - ft.-lb. (Nm)
Item
Description Specification 24WCBD
36WCBD
48WCBD
4
Wear Plate Screw
Size
5/16-18 NC Gr. 8
3/8-16-NC2 Gr. 8
3/8-16-NC2 Gr. 8
5 Locknut" Quantity 90
108
120
Torque, Dry
21 (28)
40 (54)
40 (54)
18
Locknut
Size
1 1/8-7 NC Gr. 8
1 3/8-6 NC Gr. 8
1 3/8-6 NC Gr. 8
Quantity 12
16
16
Torque, Lubed
500 (677)
750 (1016)
750 (1016)
Customer
Mounting Screw
Size
5/8-11NC-2 Gr. 8
1-8 NC Gr. 8
1 3/8-6NC Gr. 5
Supplied
Quantity
10
14
14
Torque, Lubed
150 (203)
660 (895)
1100 (1490)
