TM 5-3805-281-24-1
System Operational Checks
EXHAUST SMOKE
Operate engine until coolant temperature gauge needle
YES: Go to Diagnose
CHECK
is in the "GREEN" zone before doing this check.
Engine Malfunctions,
Group 9010-15.
Run engine at fast idle.
NO: Go to next check.
Counter rotate tracks to put load to engine.
Observe exhaust smoke.
T6488GF
UN19OCT88
Is exhaust smoke dark black or blue smoke? Is exhaust
smoke gray or white?
NOTE: Dark black smoke can be caused by dirty air filter
9010
or poor fuel delivery. Blue smoke can be caused by worn
10
or damaged piston rings or cylinder liners. Gray or white
8
smoke can be caused by a cold engine, dirty injection
nozzles, or both.
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