TM 55-4920-384-13&P
50
100
HOUR
INSPECTION
HOUR
GENERAL
Spark Plug. Inspect the spark plugs for
looseness, bad connections, and dirty or bro-
ken insulators.
Replace damaged spark plug. Clean dirty
plugs and set the gap to 0.030 inch.
Alternator and Starter. Inspect the mount-
ing of the alternator and starting motor for
loose connections. Examine the brushes,
brush holders and springs. Inspect the com-
mutators for dirt and scoring.
Tighten loose mounting bolts. Replace
brushes worn to one half their original
length.
A l t e r n a t o r . The alternator regulator
should allow an appreciable charge to go
into the battery after the starter is used.
After the battery is fully charged, the am-
meter should read only a slight charge. Re-
place a defective alternator regulator.
INSTRUMENT AND CONTROL PANEL
Gages. Examine the condition of all gages.
See that all gages indicate correctly and
that the flass is not cracked or broken. (fig-
ure 4-2).
Tighten loose mounting screws and con-
nections. Replace any defective or damaged
gage.
Meters. Seethat all meters are securely
mounted and operating properly and that
the glass is not cracked or the indicators are
not bent or broken.
Tighten loose mounting screws and replace
and defective or damaged meter.
4-3
