TROUBLESHOOTING ENGINE 11-2 Problem Cause Solution Engine Not Developing Full Power Air filters plugged Fuel line restricted Contaminated fuel Fuel filters plugged Plugged vent in fuel tank cap Injection nozzles dirty or malfunctioning Injection pump linkage adjustment Wrong fuel Wrong oil Turbocharger failure Injection pump out of timing Exhaust restriction Engine is too hot or cold Engine failure Valve clearance Intake or exhaust system leakage Replace filter elements. Repair or replace fuel line. Drain fuel tank and clean outlet screen. Refill. Change filters. Clean or install new cap. See your authorized dealer. See your authorized dealer. Use correct fuel. Use correct oil.
See your authorized dealer. See your authorized dealer. Remove muffler and run engine. See below. See your authorized dealer. Check and adjust valves. See your authorized dealer. Engine Overheats Low coolant level Thermostat Engine overloaded Radiator cap faulty Radiator core or oil cooler core plugged Radiator screen plugged Injection pump out of timing Fan damaged Air cleaner plugged Alternator and fan belt loose Pulley grooves worn Cooling system passages dirty Temperature gauge or sending unit Add coolant. See your authorized dealer. Check hydraulic relief valves. Install new cap. Clean radiator and oil cooler. Clean screen. See your authorized dealer. Replace fan. Clean air cleaner.
Tighten or install new belt. Replace pulleys. Flush cooling system. See your authorized dealer.