TM 9-2320-366-34-1
2-44
1.
NO
YES
Air cleaner element
serviced by emergency
procedure.
Air inlet system OK.
Air cleaner element OK.
START
Improperly timed injectors
will cause fuel to burn
unevenly and produce
black or gray exhaust
smoke.
Are injectors properly
timed?
YES
NO
2.
Is the fuel setting
screw adjusted properly?
Air cleaner element
serviced by emergency
procedure.
Air inlet system OK.
Air cleaner element OK.
Fuel setting OK.
Incorrect fuel setting.
Improperly timed injectors.
Incorrect valve clearance.
Faulty fuel injector(s).
Faulty governor.
Improperly timed injectors.
Incorrect valve clearance.
Faulty fuel injector(s).
Faulty governor.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Improperly adjusted fuel
setting screw will cause
fuel injector racks to travel
incorrectly and produce
black or gray exhaust
smoke.
Adjust fuel setting
screw (para 4-4).
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Adjust fuel timing
(para 4-5).
a9. EXCESSIVE BLACK OR GRAY EXHAUST SMOKE FROM ENGINE
Refer to para 4-4.
Refer to para 4-5.
INITIAL SETUP
Equipment Conditions
Engine shut down (TM 9-2320-366-10-1).
Cab raised (TM 9-2320-366-10-1).
Tools and Special Tools
Tool Kit, Genl Mech (Item 78, Appendix B)
Tool Kit, Intl Comb Eng (TM 9-2320-366-20)
Wrench, Torque, 0-60 N·m (Item 96, Appendix B)
Personnel Required
(2)
