TM 9-2330-388-14
4-44.
Brake Camshaft, Fig. 4-51.
(1) Thoroughly clean all metal parts with dry
Removal.
cleaning solvent (item 11, Appendix E). Dry the parts
with low pressure compressed air.
(1) Remove wheel and drum assembly.
(2) Inspect camshaft for twists and bends.
(2) Remove brake shoes, para 4-41.
(3) Inspect inner and outer retainers for bends
and cracks.
(3) Remove slack adjuster, 4-43.
(4) Inspect spider bushing
and
camshaft
(4) Expand retaining ring and slide camshaft
bushing for cracks and excessive wear.
part way out of spider. Remove retaining ring.
(5) Replace all parts which are not in good
(5) Glide camshaft out of spider.
condition.
(6) Remove two washers and two seals from
c.
Installation.
camshaft.
(7) Remove spider bushing.
(1) Assemble camshaft bushing, two preformed
packings, and inner and outer retainers to bracket in
(8) Remove four nuts, four washers, and four
order shown.
screws securing camshaft bushing assembly to bracket.
(2) Install four screws, four washers, and four
(9) Remove inner retainer and outer retainer.
nuts to secure camshaft hushing assembly to the
bracket. Tighten four nuts.
(10) Remove
camshaft
bushing
and
two
preformed packings.
(3) Install spider bushing.
b.
Inspection and Repair
(4) Install seal and washer, slide camshaft part
way through spider, and install second seal and washer
WARNING
on camshaft in order shown.
Dry cleaning solvent P-D-680 is toxic and
(5) Expand retaining ring and slide over
flammable. Always wear protective goggles
camshaft. Install camshaft and lock in place with
and gloves, and use only In a well-ventilated
retaining ring.
area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO
(6) Install slack adjuster, para 4-43.
NOT use near open flame or excessive heat.
(7) Install brake shoes, para 4-41.
The solvent's flash point is 100F-138F
(38C-59C). If you become dizzy while using
(8) Install wheels and drum assembly, 4-51.
cleaning solvent, immediately get fresh air
and medical help. If solvent contacts eyes,
(9) Adjust slack adjuster, part a of para 4-41.
Immediately wash your eyes with water and
get medical aid.
(10) Lubricate camshaft, fig. 3-9.
Compressed air used for drying or cleaning
4-45.
Service and Emergency Couplings, Air Lines
purposes must not exceed 30 psi (207 kPa).
and Fittings
Wear protective clothing (goggles and
gloves) and use caution to avoid injury to
a.
Test
personnel.
(1) Connect air brake hose couplings from
NOTE
towing vehicle to semitrailer, fig. 4-51. Apply brakes and
coat hose couplings, connectors, and fittings of
Use a wire brush to clean camshaft and inner
emergency and service lines with soap and water
and outer retainers, if required, to remove
solution. No leakage is permissible.
caked-on dirt and corrosion.
4-114
