4.9
Assembly Procedures
Note: Friction discs and water jackets (mount-
ing flange, end plate, and reaction plate- if
applicable) should be assembled per the
appropriate maintenance procedures prior to
final assembly of the tensioner.
4.9.1
Position the mounting flange (1) on a flat, level
surface, mounting face down.
4.9.2
Install the studs (6) into the mounting flange.
The stud end with the shorter length of
threads is to be assembled into the mounting
flange. Clean the stud end to be assembled
by applying Loctite Locquic
®
Primer Grade "T"
to the threads. After the threads have dried,
apply Loctite
®
#271 on the threads to be
assembled and insert the stud completely
into the threaded hole in the mounting flange
so that the installed end is flush or slightly
recessed inside the face of mounting flange.
See Figure 1. Using a machinists square as
a reference, hold the stud in position so that
it remains perpendicular to the machined
surface of the mounting flange until the
Loctite
®
has cured. Repeat for the remaining
studs.
Loctite Locquic
®
Primer Grade "T"
contains harmful vapors. Refer to the
product label and follow proper
safety precautions.
The end of the stud must not extend
past the mounting surface of the
mounting flange.
4.9.3
Install the appropriate number of wear spac-
ers (29) and clamp tubes (12) over the studs.
4.9.4
Place a friction disc assembly onto the
mounting flange. Center the friction disc.
4.9.5
For sizes 8, 14 and 18, place a release spring
(34) over every other clamp tube. For sizes
24, 36 and 48, install a release spring over
every
clamp tube. For single disc WCB2
tensioners, proceed to Section 4.9.9.
4.9.6
Noting the location of the water inlets in the
mounting flange, lift the reaction plate (30) into
position, align the water inlets with those in the
mounting flange, and slide the reaction plate
over the studs and clamp tubes.
4.9.7
For sizes 8, 14 and 18, place a release spring (34)
over every other clamp tube. For sizes 24, 36 and
48, install a release spring over
every
clamp tube.
4.9.8
Place friction disc assembly onto the reaction plate.
Repeat the sequence of steps 4.9.5 through 4.9.8
until all friction discs, reaction plates and release
springs are assembled.
4.9.9
Noting the location of the water inlets in the
mounting flange, lift the pressure plate (13) into
position and align the water inlets with those in the
mounting flange. Slide the pressure plate over the
studs and clamp tubes.
4.9.10
Thoroughly clean the seal grooves in the piston
(33) and apply a thin, even coat of Dow Corning
®
55 O-ring lubricant to the piston seal grooves and
chamfer on the piston, the sealing surfaces in the
cylinder (19), and the seals (21) (23).
4.9.11
Install the new seals in the grooves in the
piston, noting the orientation of the seal lips.
See Figure 17.
4.9.12
Position the cylinder on a flat level surface so
that the pressure cavity faces upward.
4.9.13
Carefully place the piston onto the cylinder with
the chamfered edge of the piston facing downward,
taking special care to avoid damaging the seal lips.
4.9.14
Gradually apply an evenly distributed force to press
the piston into the cylinder being sure not to cock
the piston which may damage the sealing surfaces
or seals. The use of ’C-clamps’ may assist with the
assembly process.
4.9.15
Lift the cylinder/piston assembly into position and
slide it over the studs, noting the orientation of the
ports on the cylinder face.
4.9.16
Lubricate the threads on the end of the studs
with 30 wt. oil or anti-seizing compound and
assemble the washers (17) and locknuts (18).
4.9.17
Tighten the locknuts, ONE TURN AT A TIME
and in an alternating ( crosswise) pattern until the
cylinder is seated firmly against the clamp tubes.
Torque the locknuts to the appropriate value.
See Table 4.
The locknuts (18) must be tightened
gradually to prevent damage to the
tensioner components.
4.9.18
Re-install the tensioner per Section 2.0.
WCB 11070 VP 4.2 Format
25
© Copyright Eaton Corp., 2003. All rights reserved
April 2002 (Revised June 2003)
