WCB 11060 (PDF Format)
20
© Copyright Eaton Corp., 1998. All rights reserved
June, 1998
4.6.11
Install the new seals in the grooves in the
piston, noting the orientation of the seals in
Figure 14.
4.6.12
Turn the cylinder over so that the cavity faces
upward.
4.6.13
Carefully place the piston into the cylinder
with the chamfered edge of the inner diame-
ter facing downward into the cylinder taking
special care to avoid damaging the seal lips.
4.6.14
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.
4.6.15
Using a lifting strap, slide the cylinder/piston
assembly onto the studs.
4.6.16
If not replacing friction disc, replace any wear
spacers that were removed in 4.6.3 and in-
stall (stored) under the locknuts for use after
replacing the friction discs.
See Figure 9.
4.6.17
Lubricate the threads on the end of the studs
with 30 wt. oil or anti-seizing compound and
install the locknuts (18) washers (17) and the
wear spacers removed.
4.6.18
While supporting the weight of the cylin-
der/piston assembly, 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 5.
The locknuts (18) must be tightened
gradually to prevent damage to the
tensioner components.
4.6.19
Connect air supply line.
4.6.20
Perform an air test by applying 80 PSIG (5.5
bar) to engage the tensioner. Shut off the air
supply. If the air pressure does not drop
below 70 PSIG (4.8 bar) after 10 minutes,
the seals have been properly installed.
4.7
Bushing Replacement
4.7.1
Remove and dis-assemble per
section 4.2 and 4.3.
4.7.2
Refer to Table 10 to determine if the reaction
plate bushings (54) (see figure 15) require
replacement. See section 7.0 for parts.
4.7.3
Heat up area around bushing to release
Loctite
®
and drive old bushing out.
4.7.4
Clean out bores and remove old Loctite
®
.
4.7.5
Apply Loctite
®
#RC601, 635 or 680 to the
bushing O.D. and mating hole in the reaction
plate using a swab. Apply enough liquid to fill
all the space between the parts. Twist the
bushing while pushing it down, until it is flush
with the casting surface. Inspect to see that
the ring of liquid adhesive visible at the
parting line. Allow reaction plate to dry for
15 minutes before moving it.
4.7.6
Assemble brake per section 4.8.
Figure 14
Figure 15
