English
● Do not install or remove cutting attachments
while the engine is running.
● Always
use
genuine
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
4,500 min
).
–1
Specifi cations
Type of
Code No.
attaching
screw
Female
6696454
screw
Female
6696597
screw
Applicable nylon cord
Cord diameter: 1/8˝ (Φ3.0 mm) Length: 6.5 ft (2 m)
Cord diameter: 3/22˝ (Φ2.4 mm) Length: 13 ft (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 (22) on the case is no
longer visible or there is a hole in the bottom (23)
of the button, change the new parts immediately.
(Fig. 10)
22
○ 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.
10
Hitachi
cutting
Size of
Direction of
attaching
rotation
screw
M10×P1.25-
Counterclockwise
LH
M8×P1.25-
Clockwise
RH
23
Fig. 10
WARNING
For
Hitachi
heads,
non-metallic
line
manufacturer. Never use wire or wire ropes.
They can break off and become a dangerous
projectile.
3. Installation (Fig. 11)
Insert the allen wrench (24) 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. The mounting nut is left-hand-
threaded. Turn clockwise to loosen/counter-
clockwise to tighten.
24
NOTE
For curved drive shaft tube models, the mounting
nut
is
right-hand-threaded.
clockwise to loosen/clockwise to tighten.
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 1-3/16˝ (3 cm) with each tap.
(Fig. 12)
use
only
fl exible,
recommended
by
Fig. 11
Turn
counter-
Fig. 12
the