12
English
Spark plug (Fig. 28)
The spark plug condition is in
fl
uenced by:
○
An incorrect carburetor setting
○
Wrong fuel mixture (too much oil in the gasoline)
○
A dirty air
fi
lter
○
Hard running conditions (such as cold weather)
These factors cause deposits on the spark plug electrodes, which
may result in malfunction and starting di
ffi
culties. If the engine
is low on power, di
ffi
cult to start or runs poorly at idling speed,
always check the spark plug
fi
rst. If the spark plug is dirty, clean it
and check the electrode gap. Re-adjust if necessary. The correct
gap is 0.6 mm. The spark plug should be replaced after about 100
operation hours or earlier if the electrodes are badly eroded.
NOTE
In some areas, local law requires using a resistor spark plug
to suppress ignition signals. If this machine was originally
equipped with resistor spark plug, use same type of spark plug
for replacement.
Angle transmission (Fig. 29)
Check angle transmission or angle gear for grease level about
every 50 hours of operation by removing the grease
fi
ller plug on
the side of angle transmission.
If no grease can be seen on the
fl
anks of the gears,
fi
ll the
transmission with quality lithium based multipurpose grease up to
3/4. Do not completely
fi
ll the transmission.
Semi-auto cutting head
Nylon line replacement
(1) Remove the case (26) by
fi
rmly pushing inward the locking tabs
with your thumbs as shown in
Fig. 30
.
(2) After removing the case, take out the reel and discard the
remaining line.
(3) Fold the new nylon line unevenly in half as shown in picture.
Hook the U-shaped end of the nylon line into the groove (27) on
the center partition of the reel.
Wind both halves of the line on the reel in the same direction,
keeping each half of the line on its own side of the partition.
(
Fig. 31
)
(4) Push each line into the stopper holes (28), leaving the loose
ends approx. 10 cm in length. (
Fig. 32
)
(5) Insert both loose ends of the line through the cord guide (29)
when placing the reel in the case. (
Fig. 33
)
NOTE
When placing a reel in the case, try to line up the stopper holes
(28) with the cord guide (29) for easier line release later.
(6) Place the cover over the case so that the cap locking tabs (30)
on the case meet the long holes (31) on the cover. Then push
the case securely until it clicks into place. (
Fig. 34
)
(7) The initial cutting line length should be approx. 11
–
14 cm and
should be equal on both sides. (
Fig. 35
)
Maintenance schedule
Below you will
fi
nd some general maintenance instructions. For
further information please contact Hitachi Authorized Service
Centers.
Daily maintenance
○
Clean the exterior of the unit.
○
Check that the harness is undamaged.
○
Check the cutting attachment guard for damage or cracks.
Change the guard in case of impacts or cracks.
○
Check that the cutting attachment is properly centred, sharp,
and without cracks. An o
ff
-centre cutting attachment induces
heavy vibrations that may damage the unit.
○
Check that the cutting attachment nut is su
ffi
ciently tightened.
○
Check that nuts and screws are su
ffi
ciently tightened.
○
Check that the unit is undamaged and free of defects.
Weekly maintenance
○
Check the starter, especially the 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.
○
Check that the angle gear is
fi
lled with grease up to 3/4.
○
Clean the air
fi
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.
000Book̲CG24EBS̲Asia.indb 12
000Book̲CG24EBS̲Asia.indb 12
2017/02/14 11:10:19
2017/02/14 11:10:19
