20
Cleaning of the cooling air system
Before cleaning, the engine must be stopped and allowed to cool down.
Remove parts of air duct.
Clean all air guide elements and the complete cooling air zones on the cylinder head,
cylinder and flywheel blades without making them wet. Blow them with compressed air.
In case of moist or oily contamination, clean the complete area with a solvent, cold cleaner
etc. according to its manufacturer’s instructions, then spray down with a powerful water jet.
Do not point the spray directly at electrical equipment or connections, or dry these
immediately afterwards with compressed air.
Trace the cause of any contamination with oil and have the leak eliminated by a HATZ
service station.
Install the air guide elements previously removed. The engine must never be run without the
air guide elements in position.
Immediately after re-assembly, run the engine until warm to prevent residual moisture from
causing rust.
Cleaning the filter cartridge
Slacken off wing bolt (1 on left picture) and remove it with cover (2 on left picture).
Carefully pull out filter cartridge (1 on right picture)
Clean all parts except the filter cartridge. Do not spray into the engine’s air intake when
cleaning.
Blow through the filter cartridge from the inside, moving the jet of dry compressed air up
and down until no further dust is expelled. Air pressure must not exceed 5 bar.
Tilt the cartridge and hold it against the light (or shine a light through it) to trace any
cracks or other damage.
If there is even the slightest damage to paper filter element „2“ or sealing lips „3“,
the filter element must not be reused.
By wet or oily contamination, change the cartridge.
Checking of the valve clearance and of the fuel filter
Contact a HATZ-Service station to make this maintenance.
