Northern Lights M773LW3 Operator's Manual page 28

ENGINE
PROBLEM
Lack of Engine Power,
continued
Engine Overheats
Engine Knocks
High Fuel Consumption
If you cannot correct problems with these procedures, see your Northern Lights dealer.
Troubleshooting
POSSIBLE CAUSE
Below normal engine temperature • Remove and check thermostat.
Injection pump fuel supply
insufficient
Improper valve clearance
Dirty or faulty injection nozzles
Cylinder compression pressure
low, cylinder compression pressure • Adjust nozzle holder alignment
leakage
Low coolant level or cooling
system defective
Keel cooling tubes
have been painted
Cooling system needs flushing
Defective thermostat
Defective temperature gauge
Water pump impeller worn/broken • Check impeller and replace if necessary.
Insufficient oil
Injection pump out of time
Below normal engine temperature • Check your thermostats.
Engine overheating
Improper type of fuel, or fuel
leaking
Clogged or dirty air cleaner
Improper valve clearance
Injection nozzles dirty
Injection pump out of time
Engine overloaded
Engine not at proper temperature
OM773LW3 11/20
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RECOMMENDATION(S)
• Air mixing in injection pump.
• Fuel filter clogged.
• Reset valves. Best done by dealer.
• Replace injectors. Best done by dealer.
• Adjust valve clearance
• Check cylinder bore wear
• Fill tank or radiator to proper level.
• Check hoses for loose connections
and leaks.
• V belt slippng.
• Remove paint from tubes.
• Flush cooling system.
• Remove and check thermostat.
• Check water temperature with thermometer
and replace gauge if necessary.
• Contact your dealer.
• Contact your dealer.
• Check water temperature to see if
temperature gauge is working properly.
• See "Engine Overheating" section.
• Use correct fuel for temperature.
• Check installation or tightening.
• Service air cleaner.
• Contact your dealer.
• Contact your dealer.
• Contact your dealer.
• Check load usage.
• Check thermostats.
• Check water temperature with thermometer
and replace gauge if necessary.