Storage; Maintenance Schedule; Fault Location - Makita EH7500S Bedienungsanleitung

STORAGE

MAINTENANCE SCHEDULE

General
After each refuelling
Daily
Every 50 hours
Weekly
Quarterly
Shutting down
procedure

FAULT LOCATION

Fault
Engine not starting or
under difficulties
Warm start problems
Engine starts but dies
immediately
Insufficient performance
Engine assembly,
screws and nuts
Throttle lever
I-O switch
Air filter
Cooling air duct
Cutting tool
Idling speed
Gear case
Spark plug
Muffler
Suction head
Fuel tank
Fuel tank
Carburetor
System
Ignition system Ignition spark is present
No ignition spark
Fuel supply Fuel tank filled
Compression Inside of engine
Outside of engine
Mechanical fault Starter not engaging
Tank filled Ignition spark
existing
Fuel supply Tank filled
Several systems may Engine idling
simultaneously be
affected
- When keeping the machine in storage for a 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.
Visual inspection for damage and tightness
Check for general condition and security
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 opening
To be replaced
To be cleaned
Empty fuel tank
Operate until engine runs out of fuel
Observation
Faulty fuel supply or compression system, mechanical
defect
I-O 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, cylinder or piston rings defective
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 I-O switch faulty
Air filter contaminated, carburetor contaminated, muffler
clogged, exhaust duct in the cylinder clogged
1
Cause