8
WARNING
During operation, hold the unit
fi
rmly with both hands. A single
hand operation may cause serious injury.
Adjustment of blade angle (Fig. 16, 17)
WARNING
Always stop engine before making adjustments.
Never touch the blade when adjusting blade angle. Hold the
support handle (20) instead.
1. Stop the engine.
2. Loosen handle knob (21) slightly so that the support handle (20)
slides.
3. Adjust the blade angle to desired position by holding the support
handle (20).
4. Then,
fi
nger-tighten the handle knob (21) securely.
21
20
Fig. 16
Fig. 17
Trimming techniques
This unit is designed for trimming hedges and small branches.
Follow these tips for successful operation.
○
Plan cut carefully. Check direction branch will fall.
○
Long branches should be trimmed in several pieces.
○
Do not stand directly beneath branch being cut.
○
Apply a light cutting pressure.
○
Ease cutting pressure when nearing end of cut to maintain
control.
MAINTENANCE
MAINTENANCE, REPLACEMENT OR REPAIR OF THE EMISSION
CONTROL DEVICES AND SYSTEMS MAY BE PERFORMED
BY ANY NON-ROAD ENGINE REPAIR ESTABLISHMENT OR
INDIVIDUAL.
Carburetor adjustment (Fig. 18)
WARNING
○
The cutting attachment may be spinning during carburetor
adjustments.
○
Never start the engine without the complete clutch cover and
tube assembled! Otherwise the clutch can come loose and
cause personal injuries.
In the carburetor, fuel is mixed with air. When the engine is test run at
the factory, the carburetor is basically adjusted. A further adjustment
may be required, according to climate and altitude. The carburetor
has one adjustment possibility:
T = Idle speed adjustment screw.
Idle speed adjustment (T)
Check that the air
fi
lter is clean. When the idle speed is correct, the
cutting attachment will not rotate. If adjustment is required, close
(clockwise) the T-screw, with the engine running, until the cutting
attachment starts to rotate. Open (counter-clockwise) the screw
until the cutting attachment stops. You have reached the correct idle
speed when the engine runs smoothly in all positions well below the
rpm when the cutting attachment starts to rotate.
If the cutting attachment still rotates after idle speed adjustment,
contact Hitachi Authorized Service Centers.
T
Fig. 18
NOTE
Standard Idle rpm is 2500 – 3000 min
-1
.
WARNING
When the engine is idling the cutting attachment must under no
circumstances rotate.
Air
fi
lter (Fig. 19)
The air
fi
lter must be cleaned from dust and dirt in order to avoid:
○
Carburetor
malfunctions
○
Starting
problems
○
Engine power reduction
○
Unnecessary wear on the engine parts
○
Abnormal fuel consumption
Clean the air
fi
lter daily or more often if working in exceptionally
dusty areas.
22
Fig. 19
Cleaning the air
fi
lter
Remove the air
fi
lter cover and the
fi
lter (22). Rinse it in warm soap
suds. Check that the
fi
lter is dry before reassembly. An air
fi
lter
that has been used for some time cannot be cleaned completely.
Therefore, it must regularly be replaced with a new one. A damaged
fi
lter must always be replaced.
Fuel
fi
lter (Fig. 20)
Drain all fuel from fuel tank and pull fuel
fi
lter line from tank. Pull
fi
lter
element out of holder assembly and rinse element in warm water with
detergent.
Rinse thoroughly until all traces of detergent are eliminated.
Squeeze, do not wring, away excess water and allow element to air
dry.
000Book̲CH22EPA(S)̲Eng.indb 8
000Book̲CH22EPA(S)̲Eng.indb 8
2014/11/14 10:33:59
2014/11/14 10:33:59
