Hitachi CH 78EC3 (ST) Trimmer User Manual


 
9
NOTE
Lubrication should be applied at 20 hour intervals and more
frequently with heavy use.
Fuellter (Fig. 15)
Remove the fuel lter from the fuel tank and thoroughly wash it in
solvent. After that, push the lter into the tank completely.
Fig. 15
NOTE
If the lter is hard due to dust and dirt, replace it.
Cleaning the cylinderns (Fig. 16)
When leaves get caught between cylinder ns (8), the engine may
overheat, resulting in lower output. To avoid this, always keep
cylinder ns and fan case clean.
Every 100 operating hours, or once a year (more often if conditions
require), clean ns and external surfaces of engine of dust, dirt and
oil deposits which can contribute to improper cooling.
8
Fig. 16
Cleaning the mu er (Fig. 17)
Remove the mu er and spark arrestor (if so equipped), and clean
out any excess carbon from the exhaust port or mu er inlet every
100 hours of operation.
Fig. 17
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 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.
Maintenance schedule
Below you will nd some general maintenance instructions. For
further information please contact your Hitachi 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 su ciently tightened.
Make sure that the blade transport guard is undamaged and
that it can be securely tted.
Check that nuts and screws are su ciently 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 ns on the cylinder and check that the air
intake at the starter is not clogged.
Check gear case is lled with grease.
Clean the air lter.
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.