Makita EH 620, EH 450 manual Storage, Maintenance Schedule, Fault Location

STORAGE

I n

1

-When keeping the machine in storage fora long,time, drain fuel from the fuel tank and carburetor, as follows: Drain all fuel from the fuel tank.

-Remove the spark plug and add a few drops of oil into the spark plug hole. Then, pull the starter gently to confirm that oil film covers the engine inside and tighten the spark plug.

-Clear dirt or dust from the cutter blade and outside of engine, wipe them with a oil-immersed cloth and keep the machine at a place as dry as possible.

-Abide by Federal and Local regulations for safe storage and handling of gasoline.

MAINTENANCE		SCHEDULE		1
General	I		Engine assembly,
			screws and nuts
After each refuelling			Throttle lever
			Safety lock key
			STOP switch
Daily			Air filter
			Cooling air duct
			Cutting tool
	I		Idling speed	I
Every 15 hours			Gearcase
Weekly			Spark plug	1
			Muffler
Quarterly			Suction head
	rFuel tank
Shuting down			Fuel tank
procedure			Carburetor

FAULT LOCATION

Visual inspection for damage and tightness Check for general condition and security

Functional check Functional check Functional check

To be cleaned To be cleaned

Check for damage and sharpness Inspection (cutting tool must not move)

supply of grease

Inspection, replace if necessary

Check and if necessary clean the oDenina

To be replaced To be cleaned

Empty fuel tank

Operate until engine runs out of fuel

I

1

Fault System 0bservat ion

Engine not starting Ignition system Ignition spark is present
or under difficulties		No ignition spark
	Fuel supply	Fuel tank filled
	Compression	Inside of engine
	I	Outside of engine
	Mechanical	Starter not engaging
	fault
Warm start problems		Tank filled
		Ignition spark existing
Engine starts but dies	Fuel supply	Tank filled
immediately
Insufficient	Several	-
		Engine idling
performance	systems may
	simultaneously
	be affected

Cause

Faulty fuel supply or compression system, mechanical defect

STOP-switch operated, wiring fault or short circuit, spark plug or connector defective, ignition module faulty

Incorrect choke position, carburetor defective, suction head (gas line filter) dirty, fuel supply line bent or interrupted

Cylinder bottom gasket defective, crankshaft seals damaged, cvlinder or Diston rinas defective

I Improper~~sealing of spark plug

Broken starter spring, broken parts inside of the engine

Carburetor contaminated, have it cleaned

Incorrect idling adjustment, suction head or carburetor contaminated

Fuel tank vent defective, fuel supply line interrupted, cable or STOP-switch faulty

Air filter contaminated, carburetor contaminated, muffler clogged, exhaust duct in the cylinder clogged