4.6.6
Inspect the new wear plates and remove any
scratches or raised edges with very fine sand-
paper or steel wool. Position the smoothest
side of the wear plate on the mating surface
being careful to align the holes.
4.6.7
Install new screws and locknuts provided with
the wear plate replacement kit and secure
finger tight. Sizes 18 and larger require clamp
rings to be positioned between the screws or
nuts and the wear plates. See Figure 2.
To prevent excessive warpage and
to ensure a good seal, the following
hardware tightening procedure must
be followed.
4.6.8
For each wear plate being replaced, follow the
tightening sequence shown in Figure 17 for the
first 16 screws. The remaining screws may be
tightened in any reasonable crosswise pattern.
See Table 11 for tightening torque values.
Allow the Loctite Superflex
®
#596
Sealant 24 hours to completely cure
before performing the following leak
test procedure.
4.6.9
24 hours after completion of assembly, each
water cavity should be checked for leaks.
4.6.9.1
Using lifting straps, suspend each assembly
with the water outlet port at the 12 o’clock
position. Connect a water supply line to the inlet
port (at 6 o’clock position). In reaction plates,
plug the remaining inlet port. See Table 12 for
water port sizes.
4.6.9.2
Slowly fill with water to purge all air from water
cavities.
4.6.9.3
Install pipe plug(s) in the outlet port(s) and
apply appropriate water pressure (40 psi
(2.7 bar) for size 36 and 48 WCB2 units and 45
psi (3.1 bar) for all other sizes) measured at the
inlet. Maintain this pressure for a minimum of 30
minutes.
4.6.9.4
Check for leakage at O.D. and I.D. seal
areas.
NO
leakage is allowed.
4.6.9.5
If the assembly leaks, check the torque on
each screw and re-test. If leaks still occur, the
wear plate(s) or sealant groove may be
damaged. Repeat procedure from 4.6.1.
4.6.9.6
Follow steps in Section 4.9 to reassemble the
tensioner.
4.6.10
Machining of the wear surfaces is required for
sizes 36" and 48" after replacement of the wear
plates or the adjoining friction material. See
Figure 18 for machining specifications. Clean
all wear surfaces after machining to remove any
residual contaminates.
Figure 17
TABLE 11
Wear Plate Fastener Torque: ft.lb.(Nm)
Model
Size
Torque
8 WCB2
#10-24NC
5 (7)
14 WCB2
1/4-20NC2
12 (16)
18 WCB2
5/16-18NC
21 (28)
24 WCB2
5/16-18NC
21 (28)
36 WCB2
3/8-16NC2
40 (54)
48 WCB2
3/8-16NC2
40 (54)
TABLE 12
Inlet and Outlet Port Sizes
Model
Size
8 WCB2
3/8-18NPT
14 WCB2
1/2-14NPT
18 WCB2
1/2-14NPT
24 WCB2
3/4-14NPT
36 WCB2
1 1/4-11NPT
48 WCB2
1 1/4-11NPT
WCB 11070 VP 4.2 Format
22
© Copyright Eaton Corp., 2003. All rights reserved
April 2002 (Revised June 2003)
