TM 9-2330-388-14
b.
Test and Adjustment, Final Yoke and Slack
Adjustment.
WARNING
(5) Check yoke adjustment.: Dimension from
Dry cleaning solvent P - D - 680 is toxic and
outside of non-pressure housing to center of clevis pin
flammable. Always wear protective goggles
must be 5.56-inches, fig. 4-46.
and gloves, and use only in a well-ventilated
area. Avoid contact with skin, eyes, and
(6) Apply a 9/16-inch wrench to worm shaft hex
clothes, and DO NOT breathe vapors. DO
head and push in against the slack adjuster to unlock the
NOT use near open flame or excessive heat.
worm shaft.
The solvent's flash point is 100F - 138F
(38C - 59C). If you become dizzy while
(7) Turn the hex head of the worm shaft
using cleaning solvent, immediately get fresh
clockwise on slack adjuster until wheels cannot be
air and medical help. If solvent contacts
turned.
eyes, immediately wash your eyes with water
and get medical aid.
(8) Back off the worm shaft until the wheel
turns freely.
Compressed air used for drying or cleaning
purposes must not exceed 30 psi (207 kPa).
Repeat steps (1) through (8) for all four brake
Wear protective clothing (goggles and
assemblies.
gloves) and use caution to avoid Injury to
personnel.
c
Inspection and Replacement
(8) Clean anchor pins, rollers, roller retainers,
(1) Remove wheel and drum assembly, para 4-
spring pins, and brake shoe return spring with dry
51.
cleaning solvent (item 11, Appendix E). Dry the parts
with low pressure compressed air.
(2) Inspect brake linings for damage and wear.
New lining has approximately 1/2-inch of stock above
(9) Refer replacement of brake linings and
center rivets and approximately 1/4-inch of stock above
refacing of the drums to direct support maintenance.
end rivets. Replace brake shoe if lining is damaged or
worn within 1/16-inch of rivet heads. By recording lining
e.
Installation.
wear between scheduled annual brake maintenance
periods, expected wear can be calculated. Shoes with
(1) Install spring pins on brake shoes. fig. 4-
linings that will not last until the next scheduled
47.
maintenance interval should be replaced.
(2) Install rollers and roller retainers on brake
d.
Removal.
shoes.
(1) Remove wheel and drum assembly, para 4-
(3) Place brake shoes into position on brake
51.
spider, and install upper and lower anchor pins and
anchor pin washers.
(2) Using brake spring pliers, remove brake
shoe return spring, fig. 4-47.
(4) Install anchor pin retaining rings on upper
and lower anchor pins.
(3) Remove anchor pin retaining rings and
anchor pin washers.
(5) Using brake spring pliers, install brake shoe
return spring.
(4) Drive upper and lower anchor Pins from
rear of brake shoe.
e.
Assembly and Adjustment.
(5) Remove brake shoes.
(1) Install wheel and drum assembly, para 4-
51.
(6) Remove roller retainers and rollers from
brake shoes.
(2) Perform slack and yoke adjustments, parts
a and b of this procedure.
(7) Remove spring pins from brake shoes.
4-110