TK 56433-5-MM-EN
95
CONDITION POSSIBLE CAUSE REMEDY
Engine does not develop full power Air intake system clogged Clean air intake system
Fuel tank vent clogged Unclog vent
Clogged fuel tank or fuel lines Clean fuel tank and fuel lines
Speed adjustment wrong Adjust speed
Insufficient fuel volume leaving filter Check for dirty filter or air in system
Air cleaner clogged Replace air filter
Delivery of fuel pump insufficient
Repair pump
Injection pump timing off Adjusting timing
Injection nozzles defective Repair or replace nozzles
Worn injection pump plungers, delivery
valve defective, injection rate too low,
gum formations
Repair or replace pump
Compression low or unbalanced Overhaul engine
Engine speed too high Misadjusted high speed solenoid Adjust high speed solenoid
Defective injection pump
Repair injection pump
Engine fails to stop when unit is OFF Fuel solenoid defective Replace
Injection pump defective Replace pump
Engine knocks heavily Air in system Bleed fuel system
Wrong fuel Change fuel
Injection pump not timed
Retime injection pump
Injection nozzles fouled or opening
pressure too low
Clean, repair or replace injection nozzles
Delivery valve spring broken Replace spring or repair injection pump
Compression too low Overhaul engine
Valve out of adjustment Adjust valves
Fuel return line plugged Remove return line restriction
Rod or main bearing worn Replace rod or main bearings
Engine runs hot Dirty radiator Wash radiator
Coolant level is low Add coolant
Cooling system heavily scaled Clean cooling system
Cylinder head gasket leaks Replace cylinder head gasket. Use correct gasket
Faulty thermostat Check or replace thermostat
Loose or worn water pump belt Replace belt
Oil pressure low Insufficient oil in pan Add oil
Faulty oil pressure switch Check oil pressure switch. Replace if necessary
Oil control valve defective Check oil pressure control valve
Worn oil pump, camshaft, main or
connecting rod bearings, loose oil gallery
plug
Repair engine
MMeecchhaanniiccaall DDiiaaggnnoossiiss
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