TM 5-3825-229-14&P
4-36. BRAKE DRUM AND HUB ASSEMBLY (cont)
c.
Adjusting Wheel Bearings (cont).
(9)
Uncage spring brake chambers (para. 3-9).
(10) Adjust slack adjusters (para. 4-27).
(11) Remove axle supports.
d.
Repair of Brake Drum
(1)
Remove brake drum (refer to para. a above).
WARNING
Wear protective goggles when using the cleaning solvent.
Avoid contact with the eyes. If contact occurs, flush eyes
with cold water for 5 minutes and seek immediate medical
attention. Dry cleaning solvent (PD-680) is both toxic and
flammable. Avoid prolonged breathing of vapors. Avoid
skin contact. Use only in a well-ventilated area. Keep
away from open flame. Flash point of solvent is 138°F
(59C).
Checking Brake Drum for Out-of-Roundness
(2)
Clean brake drum with dry cleaning solvent (PD-680).
(3)
Check brake drum for wear, cracks or damage. Replace brake drum if damaged beyond repair.
NOTE
Slight scoring conditions can be corrected by polishing with crocus cloth. Heavy scoring and out-of-round condition
require turning brake drum on a refinishing lathe.
Whenever the drum on one side of the axle is refinished, the other drum on the same axle must be turned to the same
size.
(4)
Check inner brake surface of drum for heat checking, scoring or warpage.
(5)
Using micrometer, check inside of brake drum for out-of-round or tapered wear.
(6)
Record each reading. The maximum difference between the four readings cannot exceed 0.0006 inch (0.01524
mm). Drums with out-of-round exceed limits must be turned.
4-75