Multiquip LT6D Troubleshooting engine, Engine Troubleshooting, Possible Cause Solution

	TROUBLESHOOTING (engine)
	Table 12. Engine Troubleshooting
Symptom	Possible Cause	Solution
	No fuel?	Replenish fuel.
	Air in the fuel system?	Bleed system.
	Water in the fuel system?	Remove water from fuel tank.
	Fuel pipe clogged?	Clean fuel pipe.
	Fuel filter clogged?	Clean or change fuel filter.
	Excessively high viscosity of fuel or engine	Use the specified fuel or engine oil.
	oil at low temperature?
	Fuel with low cetane number?	Use the specified fuel.
	Fuel leak due to loose injection pipe	Tighten nut.
	retaining nut?
Engine does not start.	Incorrect injection timing?	Adjust.
	Fuel cam shaft worn?	Replace.
	Injection nozzle clogged?	Clean injection nozzle.
	Injection pump malfunctioning?	Repair or replace.
	Seizure of crankshaft, camshaft, piston,	Repair or replace.
	cylinder liner or bearing?
	Compression leak from cylinder?	Replace head gasket, tighten cylinder head
		bolt, glow plug and nozzle holder.
	Improper valve timing?	Correct or replace timing gear.
	Piston ring and liner worn?	Replace.
	Excessive valve clearance?	Adjust.
	Battery discharged?	Charge battery.
Starter does not run.	Starter malfunctioning?	Repair or replace.
	Key switch malfunctioning?	Repair or replace.
	Dead battery?	Replace battery.
Engine fails to start and	Defective ignition switch?	Replace ignition switch.
starter does not engage	Defective starter?	Replace starter
	Burned fuse?	Replace fuse.
Engine fails to start and	Broken preheat circuit?	Check preheat circuit.
	No fuel?	Add diesel fuel.
starter engages
	Defective wiring?	Check wiring.

LT6D LIGHT TOWER • operation manual — rev. #0 (07/16/13) — page 59