Multiquip LT12D, LT12P operation manual Engine revolution is not

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			TROUBLESHOOTING

		Table 10. Engine Troubleshooting (continued)

	Symptom	Possible Cause	Solution

		Fuel ﬁlter clogged or dirty?	Clean or change.
		Air cleaner clogged?	Clean or change.

		Fuel leak due to loose injection pipe	Tighten nut.
		retaining nut?	Tighten nut.
		retaining nut?
	Engine revolution is not
	Engine revolution is not	Injection pump malfunctioning?	Repair or replace.
	smooth.	Injection pump malfunctioning?	Repair or replace.

		Incorrect nozzle opening pressure?	Adjust.
		Incorrect nozzle opening pressure?	Adjust.

		Injection nozzle stuck or clogged?	Repair or replace.
		Fuel over ﬂow pipe clogged?	Clean.

		Governor malfunctioning?	Repair.

		Excessive engine oil?	Reduce to the speciﬁed level.
	Either white or
	Either white or	Piston ring and liner worn or stuck?	Repair or replace.
	blue exhaust gas is	Piston ring and liner worn or stuck?	Repair or replace.

		Incorrect injection timing?	Adjust.
	observed.	Incorrect injection timing?	Adjust.
		Deﬁcient compression?	Adjust top clearance.
		Overload?	Lessen the load.

	Either black or dark	Low grade fuel used?	Use the speciﬁed fuel.
	Either black or dark
	gray exhaust gas is	Fuel ﬁlter clogged?	Clean or change.
	observed.
	observed.	Air cleaner clogged?	Clean or change.
		Air cleaner clogged?	Clean or change.

		Deﬁcient nozzle injection?	Repair or replace the nozzle.
		Incorrect injection timing?	Adjust.

		Engine's moving parts seem to be seizing?	Repair or replace.

	Deﬁcient output.	Uneven fuel injection?	Repair or replace the injection pump.
	Deﬁcient output.	Deﬁcient nozzle injection?	Repair or replace the nozzle.
		Deﬁcient nozzle injection?	Repair or replace the nozzle.

		Compression leak?	Replace head gasket, tighten cylinder head
		Compression leak?	bolt, glow plug and nozzle holder.
			bolt, glow plug and nozzle holder.

PAGE 40 — LT12 SERIES LIGHT TOWER • OPERATION MANUAL — REV. #12 (01/20/09)

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Contents Models LT12D, LT12P This Manual Must Accompany the Equipment AT ALL TimesProposition 65 Warning Reporting Safety Defects NhtsaTable of Contents Speciﬁcations are subject to change without noticeSafety Information Safety MessagesGeneral Safety Light Tower Safetyﬁre extinguisher ﬁrst aid kitLamp Safety Engine Safety Before servicing equipmentFuel Safety Towing SafetyTransporting Safety Loading and Tie-Down on Flatbed TruckPower Cord/Cable Safety Electrical SafetyGrounding Safety Battery Safety Environmental SafetyLamp Footcandle Plot Lamp Footcandle PlotGenerator Speciﬁcations SpecificationsTrailer Speciﬁcations Engine Speciﬁcations Dimensions DimensionsReference Letter Description Dimension Length Mast Stowed Position Length Mast Deployed PositionGeneral Information Components Major Components Control Panel SideRear Control Panel Light CONTROL/BREAKERControl Panel Indoor Installation InspectionBefore Starting Engine OIL CheckFuel Check Battery CheckWipe up any spilled fuel immediately Cleaning the Radiator AIR Cleaner FAN Belt TensionCoolant Operation in Freezing WeatherLocation of Female Connectors Operation Starting the EngineStarting the Engine Perkins Starting the Engine Lombardini/Deutz EnginesMast Operation Outriggers and Support StandsDeploying the Mast to Vertical Position Raising the MastMast Operation Lowering the Mast Stowing the Mast to Horizontal PositionTurning on the Lamps Rotating the MastTesting the 120 VAC Gfci Receptacle Applying AN External LoadNormal Shutdown Emergency ShutdownMaintenance Basic Inspection and MaintenanceInspection/Maintenance FrequencyGeneral Inspection Flushing OUT Radiator and Changing CoolantChanging OIL Check Cable WearReplacing Fuel Filter Servicingthe Mast RAISE/LOWER Cable SystemRemoval from Long Term Storage StorageLower the mast to the horizontal resting position Adjustable Channel Maintenance TrailersWheel HUB Adjustment Leaf Suspension Leaf Suspension ComponentsGenerator Troubleshooting TroubleshootingSymptom Solution Engine Troubleshooting Symptom Possible Cause SolutionEngine revolution is not Lamp Troubleshooting When switch is ﬁrst Checking voltage and ballast Turned on Replacement minimizes color differencesClean ﬁxture Lamp starts slowly ARC does not strike Defective Lamp?Lamp Troubleshooting Guide ConnectionsStarting Ballast RemovalLT12 Wiring Diagram S/N 902148 and below StatorBLK GRN WHT RED LT12 Wiring Diagram S/N 902149 to LT12 Wiring Diagram S/N 902149 to LT12 Wiring Diagram S/N 902626 and Above BLK BRN Blue RED WHT YEL GRN Perkins Engine Wiring Diagram Deutz Engine Wiring Diagram LT12 Control PANEL/IGNITION Wiring Diagram DEUTZ/LOMBARDINI SpecificCommon Causes for Loss of Trailer Trailer GuidelinesTrailer Towing Guidelines Driving Conditions Coupling to the TOW VehicleTrailer Towing Tips Inoperable BRAKES, Lights or MirrorsTrailer VIN TAG Electrical Connector TOW VehicleSuspension System Side View MirrorsSafety Chains JackstandCoupler Types Ball Hitch CouplerLock washer and hitch frame Coupling theTrailer to theTow Vehicle Ball CouplerConnecting Trailer Lights Attaching Safety ChainUncoupling the Ball Hitch Pintle Hitch Coupler Pintle Coupler and Pintle HookUnsafe Tires, Lug Nuts or Wheels Tire SafetyCoupling Trailer to Tow Vehicle Pintle Coupler Determining Load Limit of Trailer StepTighten lug nuts before each tow Be sure lug nuts are tight before each towTire Fundamentals Determining Load Limit of Tow Vehicle StepP indicates the tire is for passenger vehicles Table A. Speed Rating Uniform Tire Quality Grading Standards UtqgsLetter Rating Speed Rating Tire Safety Tips Table B. Tire Wear TroubleshootingTire Repair Replacing Worn or Damaged TiresLights and Signals Wheel RimsWheels, Bearings and Lug Nuts Lug Nut Torque RequirementsFigure L. Trailer to Tow Vehicle Wiring Diagram HERE’S HOW to GET Help