Hitachi CH50EA Mode D'emploi page 11

Cleaning the cylinder fins (Fig. 3-7)
When leaves caught between cylinder fins (1),
the engine may overheat. resulting in lower
output. To avoid this, always keep cylinder fins
and fan case clean.
Every 100 Operating hours, or once a year
(more often if conditions require), clean fins and
external surfaces of engine of dust, dirt and oil
deposits which can contribute to improper
cooling.
Cleaning the muffler (Fig. 3-8)
Remove the muffler and spark arrestor (if so
equipped), and clean out any excess carbon
from the exhaust port or muffler inlet every 100
hours of operation.
For long-term storage
Drain all fuel from the fuel tank. Start and let
engine run until it stops. Repair any damage
which has resulted from use. Clean the unit with
a clean rag, or the use of high pressure air
hose. Put a few drops of two-cycle engine oil
into the cylinder through the spark plug hole,
and spin the engine over several times to
distribute oil. Cover the unit and store it in a dry
area.
GB-10
Maintenance schedule
Below you will find some general maintenance
instructions. For further information please
contact your service dealer.
Daily maintenance
Clean the exterior of the hedge trimmer.
Check the blade guard for damage or cracks.
Change the guard in case of impacts or
cracks.
Check that the blade is sharp, and without
cracks.
Check that the blade nut is sufficiently
tightened.
Make sure that the blade transport guard is
undamaged and that it can be securely fitted.
Check that nuts and screws are sufficiently
tightened.
Weekly maintenance
Check the starter, especially cord and return
spring.
Clean the exterior of the spark plug.
Remove it and check the electrode gap.
Adjust it to 0.6 mm, or change the spark plug.
Clean the cooling fins on the cylinder and
check that the air intake at the starter is not
clogged.
Check gear case is filled with
grease.
Clean the air filter.
Monthly maintenance
Rinse the fuel tank with gasoline.
Clean the exterior of the carburetor and the
space around it.
Clean the fan and the space around it.
Fig. 3-7
Fig. 3-8