1. Place the brake cylinder assembly on a stable work
surface with the large end down. Use the spring
compressor tool, defined on page 4, or a shop press
to compress the backup plate enough to remove the
retaining ring.
2. Carefully remove the retaining ring. Be careful to not
let the snap ring pliers slip out of the retaining ring
during removal.
3. Release the compression on the spring pack. When
using the compression tool, be sure to hold the
threaded rod while turning the upper nut.
4. Remove the spring guide and belleville spring stack.
Inspect the spring guide for any damage that might
prevent free movement of the springs. Inspect the
springs for cracking or displaced material. Replace
any defective parts.
5. Turn the brake cylinder over, with the large end fac-
ing up. Remove the retaining ring and the brake pis-
ton plate.
6. Push the brake piston down toward the table. Turn
the brake cylinder over and remove the piston.
Remove and discard the o-rings. Inspect the back-
up rings for nicks or cuts and replace as needed. Be
careful to not damage the o-ring groove surfaces.
7. Inspect the brake cylinder sealing surfaces for nicks
or scratches. Check the internal splines for notches
that might prevent free movement of the brake
discs. Ensure the oil port is clear of any debris.
35
BRAKE CYLINDER SERVICE
Make certain that the threaded rod of the compres-
sion tool is fully engaged into the lower plate. If a
press is used, be careful to apply only as much pres-
sure as required to allow removal of the retaining
ring. The use of too much force can damage compo-
nents.
CAUTION