2.0
INSTALLATION
Only qualified maintenance personnel
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
hazardous conditions or personal
injury.
Do not paint the clamp tubes (12), wear
spacers (29), or the release springs
(34), as this may hinder the
engagement or disengagement of
the tensioner.
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 and Alignment
2.1.1 Refer to the appropriate catalog information
(available upon request) for appropriate
envelope dimensions, mounting register
diameters, mounting bolt circles and
positions, and stud support bracket recom-
mendations for each specific tensioner.
2.1.2
The tensioner reaction member (such as
the machine frame) should have a machined
register to allow for mounting and alignment
control of the tensioner. The mounting
surface should be designed to provide full
support of the face of the mounting flange (1),
preventing deflection during operation.
2.1.3
For proper operation and service life, the
tensioner reaction member must be aligned
to the shaft within the limits shown in Table 2.
Proper alignment is necessary to
ensure that the friction discs track
properly. Improper alignment
will result in excessive wear to
the friction material and mating
surfaces, plus the gear and
splined bore of the friction disc
assemblies. See Figure 3.
Figure 3
Correct
Incorrect
TABLE 2
Alignment Requirements
Size
Concentricity
(Parallel, TIR )of
Shaft and Tensioner
Inches (mm)
Perpendicularity
(Angular, TIR) of
Mounting Flange
to Shaft*
Inches (mm)
8WCB2
0.0005 (0.13)
0.0005 (0.13)
14WCB2
0.010 (0.25)
0.007 (0.18)
18WCB2
0.010 (0.25)
0.010 (0.25)
24WCB2
0.010 (0.25)
0.012 (0.30)
36WCB2
0.010 (0.25)
0.019 (0.48)
48WCB2
0.010 (0.25)
0.025 (0.64)
* Perpendicularity measured near the outside
diame ter of the mounting flange.
WCB 11070 VP 4.2 Format
6
© Copyright Eaton Corp., 2003. All rights reserved
April 2002 (Revised June 2003)