System Operational Checks
Operate engine until coolant temperature gauge needle
YES: Go to Diagnose
is in the "GREEN" zone before doing this check.
Run engine at fast idle.
NO: Go to next check.
Counter rotate tracks to put load to engine.
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
or poor fuel delivery. Blue smoke can be caused by worn
or damaged piston rings or cylinder liners. Gray or white
smoke can be caused by a cold engine, dirty injection
nozzles, or both.