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Installation of cutting attachment
WARNING
○ Install the cutting attachment properly and securely as
instructed in the handling instructions.
If not attached properly or securely, it may come off and
cause serious and/or fatal injury.
○ Do not install or remove cutting attachments while the
engine is running.
○ Always use genuine Hitachi cutting attachments and
metal fi ttings.
Installation of semi-auto cutting head
1. Function
Automatically feeds more nylon cutting line when it is
tapped at low rpm (not greater than 4500 min
Specifi cations
Typr of
Code
attaching
No.
screw
6696454 Female screw
Applicable nylon cord
Cord diameter: Φ3.0 mm Length: 2 m
Cord diameter: Φ2.4 mm Length: 4 m
2. Precautions
○ The case must be securely attached to the cover.
○ Check the cover, case and other components for cracks
or other damage.
○ Check the case and button for wear.
If the wear limit mark (23) on the case is no longer visible
or there is a hole in the bottom (24) of the button, change
the new parts immediately. (Fig. 15)
○ The cutting head must be securely mounted to the unit's
gear case/cutter case.
○ If the cutting head does not feed cutting line properly,
check that the nylon line and all components are properly
installed. Contact Hitachi Authorized Service Centers if
you need assistance.
WARNING
For Hitachi heads, use only fl exible, non-metallic line
recommended by the manufacturer. Never use wire or
wire ropes. They can break off and become a dangerous
projectile.
3. Installation (Fig. 16)
Insert the allen wrench (25) into the hole of the gear
case/cutter case in order to lock the drive shaft tube.
Install cutting head on gear case/cutter case of grass
trimmers/brush cutters. The mounting nut is left-hand-
threaded. Turn clockwise to loosen/counter-clockwise to
tighten.
NOTE
○ For curved drive shaft tube models, the mounting nut is
right-hand-threaded. Turn counter-clockwise to loosen/
clockwise to tighten.
○ Since the cutter holder cap is not used here, keep it for
when a metal blade is used, if so equipped.
4. Adjusting line length
Set the engine speed as low as possible and tap the
head on the ground. The nylon line will be drawn out
about 3 cm with each tap. (Fig. 17)
Also, you can extend the nylon line by hand but the
engine must be completely stopped. (Fig. 18)
Adjust the nylon line to the proper length of 11–14 cm
before each operation.
Installation of cutting blade (Fig. 19)
(If so equipped)
).
-1
Size of
Direction of
attaching
rotation
screw
Counter-
M10xP1.25-
clockwise
LH
Insert the alien wrench (25) into the hole of the gear case in
order to lock the shaft.
Assemble in the following order: Cutter holder (A) (26),
blade (27), cutter holder (B) (28), nut cover (29).
Tighten the fi xing nut with the box wrench. Please note that
the cutter fi xing nut (30) has left-handed threads (clockwise
to loosen/ counter-clockwise to tighten).
NOTE
○ When installing cutter holder (B) (28), be sure to set
concave side upward.
○ When installing or removing a blade, make sure to wear
gloves and place the blade cover over the blade.
CAUTION
Check a nut cover (29) for wear or cracks before
operation. If any damage or wear is found, replace it, as
it is an article of consumption.
WARNING
○ When installing a cutting blade, make sure that there are
no cracks or any damage in it and that the cutting edges
are facing the correct direction.
○ Remove any surface grit from blade installation fi ttings
(cutter holder (A) (26), cutter holder (B) (28), nut
cover (29), nut (30)). Failure to do so may result in the
loosening of nuts.
○ The protrusion of the cutter holder (A) (26) may become
misaligned with the blade (27) while tightening nut
(30). Before operation, make sure the blade has been
properly installed. (Fig. 20)
○ Rotate the blade by hand and make sure there is no
rocking or abnormal noise. Rocking may cause abnormal
vibrations or result in the loosening of nuts.
OPERATING PROCEDURES
Engine oil
○ Always use the specifi ed engine oil (multigrade oil of
classifi cation SAE 10W-30). Insuffi cient engine oil or
using engine oil other than the specifi ed type may cause
breakdown of the unit.
Filling up with engine oil
○ Place the unit horizontally on a clean, fl at surface.
○ Remove the oil cap and check whether the engine oil
comes up to the mouth of the oil tank opening. (Fig. 21)
○ If the oil level is low or when using the unit for the fi rst
time, fi ll the tank with engine oil up to the mouth of the oil
tank opening.
○ If the engine oil is conspicuously dirty or discolored,
change the oil.
○ Tighten the oil cap securely after fueling.
○ When using the unit for the fi rst time, change the engine
oil after running the engine for approximately 10 hours.
Subsequently, change the oil after every 50 hours of
operation.
CAUTION
○ To avoid the risk of burn injuries, allow the engine to cool
thoroughly before changing the engine oil.
○ To prevent breakdown, ensure that no sand or dirt gets
into the tank while refueling.
Fuel
WARNING
○ Provide good ventilation, when fueling or handling fuel.
○ Fuel contains highly fl ammable and it is possible to get
the serious personal injury when inhaling or spilling on
your body. Always pay attention when handling fuel.
Always have good ventilation when handling fuel inside
building.
○ Always use branded 89 octane unleaded gasoline.
11
English
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