CUMMINS N14 - Engine Runs Rough or Misfires (Continued)

Engine Runs Rough or Misfires (Continued)
Cause Corrections
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Engine Brakes or Exhaust Brakes
Adjustment Incorrect
OK
f
Adjust to specification. Refer to Proce-
dure 7-05.
----------
Overhead Adjustment Incorrect
OK
f
Check for a bent or mislocated push rod,
crossheads, and rocker levers and adjust
overhead. Refer to Procedure 7-04.
----------
STC Injector Tappet(s) Malfunctioning
OK
f
Locate smoking cylinder. Replace or
rebuild injector tappet(s). Refer to the STC
Injector Shop Manual, Bulletin No.
3810313.
----------
Injectors Malfunctioning
OK
f
Perform injector cut out test. Refer to
Procedure 5-15. Replace injectors as
required. Refer to Procedure 5-10.
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Injection Timing Set Incorrectly
OK
f
Check timing. Refer to Procedure 7-22.
----------
Exhaust or Intake Valve Leakage
OK
f
Test cylinder head and replace cylinder
head if necessary. Refer to Procedure
7-18.
----------
Internal Engine Damage
Remove oil pan and inspect for damaged
camshaft, cam followers, push rods,
pistons, liners, rings, etc. Refer to Procedure
2-12.
Troubleshooting Symptoms Charts SectionT-Troubleshooting
N14Page T-58