4.3.6.5
The remaining rivets may be installed in any
reasonable sequence following 4.3.6.4.
4.3.7
Attach the ring gear to the friction disc using
Loctite
®
#262 and torque screws to 40 ft, lbs.
4.3.8
Reassemble per 4.7.
4.4
Cylinder Seal Replacement
4.4.1
Disconnect the air supply lines and remove
the screws (20), washers (17) and spacer
tubes (27) attaching the cylinder (19) to the
pressure plate (14).
4.4.2
Carefully slide the cylinder off of the spring
housing (16).
Do not use compressed air to
remove the cylinder from the spring
housing.
4.4.3
Remove the cylinder seals (21,23) from the
spring housing and thoroughly clean the seal
grooves in the spring housing.
4.4.4
Insert new seals into the grooves, noting the
orientation of the seals per Figure 10.
4.4.5
Carefully examine the seal surfaces in the
cylinder. If the surfaces have worn to point
as indicated on Table 4, the cylinder must be
replaced. Small nicks or scratches must be
sanded smooth to prevent air leakage.
4.4.6
Lubricate the seal surfaces in the cylinder
with Parker O-Lube
®
and carefully slide the
cylinder onto the spring housing. Take spe-
cial care to avoid damaging the seal lips.
4.4.7
Attach the cylinder to the pressure plate with
the screws, washers and spacer tubes
removed in 4.4.1. Use Loctite
®
Locquic
®
Primer Grade "T" to clean and prepare the
screw threads and install with Loctite
®
#262.
Using a crosswise pattern, torque the screws
to the value shown on Table 3.
Loctite
®
Primer "T" contains harm-
ful vapors. Refer to the product
label for proper safety precautions.
4.5
Spring Replacement
4.5.1
with 100 psi applied to the cylinder (19),
loosen and remove the locknuts (18) and
washers (17). Exhaust the air pressure.
4.5.2
Disconnect the air supply lines from the
brake.
4.5.3
Loosen the screws (20) gradually until the
remaining spring force is relieved. Remove
the screws and washers (17).
The screws (20) must be loosened
gradually to prevent damage to the
brake components.
4.5.4
Carefully lift the cylinder and spring housing
off of the pressure plate, exposing the
springs (22).
4.5.5
Remove the springs and check the free
height. If the free height of any spring is less
than the value shown on Table 4, the entire
complement of springs must be replaced.
4.5.6
Place the springs into the pockets in the
pressure plate per Figure 11.
4.5.7
Place the spring retainers on top of the
springs.
Figure 10
DBB 8104 PDF format
10
© Copyright Eaton Corp., 1998. All rights reserved.
(Revised: January, 1998)
