Multiquip LS400/LS500 PUMP -TROUBLESHOOTING ENGINE, Engine Troubleshooting, Symptom, Solution

LS400/LS500 PUMP —TROUBLESHOOTING (ENGINE)

Practically all breakdowns can be prevented by proper handling and maintenance inspections, but in the event of a breakdown, please take a remedial action following the diagnosis based on the Engine Troubleshooting (Table 9) information shown below and on the proceeding page. If the problem cannot be remedied, please leave the unit just as it is and consult our company's business office or service plant.

TABLE 10. ENGINE TROUBLESHOOTING

SYMPTOM	POSSIBLE PROBLEM	SOLUTION
	Speed control lever is in "STOP" position	Set speed control lever to "START" position.
	No fuel reaching injection pump	Add fuel. Check entire fuel system.
	Defective fuel pump	Replace fuel pump.
	Fuel filter clogged	Replace fuel filter and clean tank.
Engine will not start or start is	Faulty fuel supply line	Replace or repair fuel line.
delayed, although engine can be	Compression too low	Check piston, cylinder and valves. Adjust or
turned over.		repair per engine repair manual.
	Fuel injector not working correctly	Repair or replace injector in accordance with
		engine repair manual.
	Oil pressure too low	Check engine oil pressure.
	Low starting temperature limit exceeded	Comply with cold starting instructions and
		proper oil viscosity.
		Check whether clear (not turbid) fuel emerges
		from the fuel line (detach from injection
	Fuel separates has inadequate resistance to	pump). If the fuel is turbid or separated, warm
At low temperatures engine	low temperatures	up the engine or drain the complete fuel
		supply system. Refuel with winter grade diesel
will not start.
		fuel.
	Engine oil too thick	Refill engine crankcase with correct type of oil
		for winter environment.
	Throttle lever in STOP position	Reposition throttle lever to RUN position.
Engine fires but stops soon as
	Fuel filter blocked	Replace fuel filter.
starter is switched off.
	Fuel supply blocked	Check the entire fuel system.
Engine stops by itself during	Fuel tank empty	Add fuel.
normal operation.	Fuel filter blocked	Replace fuel filter.
	Fuel tank empty	Replace fuel filter.
	Fuel filter clogged	Replace fuel filter.
Low engine power, output and	Fuel tank venting is inadequate	Ensure that tank is adequately vented.
speed.
	Speed control lever does not remain in	See engine manual for corrective action.
	selected position
	Engine oil level too full	Correct engine oil level?
	Air filter blocked	Clean or replace air filter.
Low engine power output and low
	Incorrect valve clearances	Adjust valves per engine specification.
speed, black exhaust smoke.
	Malfunction at injector	See engine manual.

MAYCO LS400/LS500 PUMP — OPERATION AND PARTS MANUAL — REV. #6 (09/19/11) — PAGE 65