ARMY
TM 5-6115-612-34
MARINE CORPS TM 6115-34/8
AIR FORCE
TO 35C2-3-471-2
NAVY
AG-320BO-MME-OOO
8-1.
GENERAL. (cont)
d.
Overhaul. (cont)
Table 8-1.
General Defect Definitions
Term
Definition
Probable cause
Abrasion
A roughened area. Can
Foreign particles between moving
be defined as light to
parts.
heavy dependent upon
amount of rework neces-
sary to restore surface.
Blistering
Raised areas indicating
Imperfect bond with base, usually
separation of the surface
aggravated by presence of mois-
from the base.
Usually
ture, gas, heat, pressure, or
found on plated or
chemicals.
painted surface.
Brinelling
Indentations sometimes
Improper assembly or disassembly
found on surfaces of
technique, such as removing or
ball or roller bearing
installing a roller or ball bear-
parts.
ing by pressure on free race.
NOTE
Bearings which do
not have full
constant rotation
and are subjected
to shock loading
have brinelling
tendencies.
Burning
Damage to surfaces by ex-
Improper clearances or lack of
cessive heat.
Evidenced
lubrication due to plugged oil
by discoloration or some-
passages, etc.
times by flow or loss of
metal.
Burrs
A sharp projection or
Careless handling or improper
rough edge.
machining.
8-2
