Kohler SFGLD480 Operation & Maintenance Manual page 312

SYMPTOM
High exhaust gas emissions
Excessive vibrations
Unusual noise
Excessive fuel consumption
(1)
Engines with mechanical carburetion
(2)
Engines with electronic carburetion
(3)
Engines with NOx sensor or lambda sensor carburetion
PRODUCT INFORMATION
IO-G-T-00-001e
GAS ENGINES TROUBLESHOOTING
PROBABLE CAUSE
Excessively advanced ignition
Carburetion maladjustment
Ignition failures
Change in gas quality
Dirty air filters
Incorrect alignment of engine
Fasteners loose
Defective damper
Wrong crankshaft counterbalance
Loose flywheel
Knocking
Overload
Excessive valve clearance
Sticking valves
Piston hits jet
Pin failure
Excessive crankshaft end play
Gears in bad condition
Leak in intake or exhaust
Leak in gas system
Incorrect ignition advance
Combustion failure in a cylinder
Incorrect air-fuel mixture
Overload
INDEX
B
REMEDY
Check with a stroboscopic lamp and re-time
as necessary
Readjust carburettor mixture valve.
Check MAP and MAT sensors signal
Check NOx sensor or lambda sensor signal
Check spark plugs, high-voltage wires and
ignition coils
Readjust carburettor mixture valve.
Change air filters
Re-align
Retighten fasteners
Change damper
Re-balance
Retighten flywheel fasteners
Stop engine and check cylinders
Check power signal
Re-adjust valve clearance
Repair valves
Change jet
Change pin
Replace main bearing thrust rings.
Change defective gears
Locate and repair leaks
Locate and repair leaks
Adjust timing with a stroboscopic lamp
Check coils, wires and ignition spark plugs
Readjust carburettor mixture valve
Check MAP and MAT sensors signal
Check NOx sensor or lambda sensor signal
Recalibrate power signal
6.1.9
DATE
Dep. 2
February 2016
O&M_2.002211.810_A_10_2016
(1)
(2)
(1)
(1)
(2)
(3)
(1)
9/10