Hitachi DW25EF Manual Del Propietário página 12

Fuel filter (Fig. 3-5)
Remove the fuel filter from the fuel tank and
thoroughly wash it in solvent. After that, push
the filter into the tank completely.
NOTE !
If the filter is hard due to dust and dirt, replace
it.
Cleaning the cylinder fins (Fig. 3-6)
When wood chips are caught between cylinder
fins, 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. 3-7)
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.
Fig. 3-5
Fig. 3-7
Maintenance schedule
Below you will find some general maintenance
instructions. For further information please
contact HITACHI dealer.
Daily maintenance
Clean the exterior of the unit.
Check that the drilling attachment is properly
centred, sharp, and without cracks. An
offcentred bit induces heavy vibrations that
may damage the unit.
Chock that the drilling attachment is
sufficiently tightened.
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 that the angle gear is filled with grease
up to 3/4.
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.
G
B
Fig. 3-6
GB-11