WCB 11060 (PDF Format)
8
© Copyright Eaton Corp., 1998. All rights reserved
June, 1998
2.0
INSTALLATION
Only qualified maintenance person-
nel should install, adjust or repair
these units. Faulty workmanship will
result in unreasonable exposure to
hazardous conditions or personal
injury.
Read these instructions thoroughly
and review until you fully under-
stand the installation sequence
before proceeding with the work
described in this section. Failure to
follow these instructions will result
in unreasonable exposure to hazard-
ous conditions or personal injury.
Do not paint the clamp tubes (12) or
the springs (34), as this may hinder
the engagement or disengagement
of the tensioner.
Maximum ambient temperature is
110
o
F (43
o
C ). Minimum ambient
temperature for closed loop
systems using ethylene glycol
antifreeze is 0
o
F (-18
o
C). For open
loop systems using water, the
minimum temperature is 45
o
F (7
o
C).
Note: Some three and four disc units may
require support on the cylinder end of the
tensioner in certain high torque applications.
Contact the factory for specific application
information.
2.1
Preparation
2.1.1
Table 3 shows the relationship between the
tensioner mounting surface and the end of
the gear (dimension “A” on Figure 1-3 ). The
gear is bored and keyed for a resulting Class
FN2S interference fit for inch shafting and
ISO System S7h6 for metric shafting.
2.1.2
Figure 4 & 5 and Table 2 show the mounting
dimensions for the tensioner to the machine
frame or reaction bracket. Note that a male
or female register may be used.
2.2
Alignment
2.2.1
For proper operation and service life, the
tensioner reaction member must be aligned
to the shaft within the limits shown on
Table 4.
Proper alignment is necessary to
ensure that the friction discs track
properly. Improper alignment will
result in excessive wear to the
friction material and its mating
surfaces, the gear and splined
bore of the friction disc assembly.
See Figure 6.
Correct Track
Incorrect Track
Figure 6
Table 3
“A” Dimension on Figure 1 - in. (mm)
Size
Single
Dual
Triple
Quad
18WCB
1.25 (31.8)
1.25 (31.8)
0.75 (19.1)
N/A
24WCB
1.38 (35.1)
1.00 (25.4)
0.63 (16.0)
1.38 (35.1)
36WCB
1.50 (38.1)
2.38 (60.5)
2.38 (60.5)
2.38 (60.5)
Table 4
Alignment Requirements
Size
Concentricity of
Shaft and Brake
In. (mm)
Perpendicularity of
Mounting Flange (2)
to Shaft - In. (mm)
18WCB
0.010 (0.25)
0.010 (0.25)
24WCB
0.010 (0.25)
0.012 (0.30)
36WCB
0.010 (0.25)
0.019 (0.48)
