Figure 8-28. AB brake cylinder, showing air pipe connection when used with automatic slack adjuster.
b. Cleaning, Inspection, and Maintenance
(a) Submerge the piston lubricator in a tank
(1) Blow all dirt out of the nonpressure head
of solvent for a few minutes; then loosen the lubricator
swab in its groove with a thin round edge blade. Return
(2) Using a scraper and solvent, clean the seal
the lubricator swab to the solvent tank long enough to
recess in the nonpressure head gasket face.
dissolve the grease.
(3) With a tile, break any sharp edges from the
(b) Brush the outer surface of the lubricator
ends of the opening in the nonpressure head 'which
swab with a handbrush and blow dry with compressed
guides the hollow rod.
(4) Clean the piston and the hollow rod,
(c) Renew the lubricator swab if it is
removing any rust or rough surfaces; use emery cloth if
,damaged, worn out, or in such a condition that it cannot
be loosened and raised in its groove to make a full
(5) Examine the compression spring. If rust
contact against the cylinder wall.
,spots are found, clean them with emery cloth and coat
(d) Submerge the clean lubricator in a tank
the spring with a rust preventive.
of oil. Soak in the oil for at least 10 minutes and allow it
(6) Clean the seal ring retaining plate and the
to drain for about 10 minutes This will saturate the
seal rings, renewing any ring which does not close firmly
lubricator swab with oil and thereby prevent it from
on the hollow rod.
absorbing the brake cylinder lubricant.
(7) Thoroughly clean the packing cup (4) with
solvent and clean the piston lubricator as follows: