Operating Procedures - Hitachi CG 25EUS Handling Instructions Manual

English
Install the cutting attachment guard on drive shaft tube against
angle transmission. Tighten the guard bracket fi rmly so that the
cutting attachment guard does not swing or move down during
operation.
Install the cutting attachment guard to the guard bracket, which also
secures the guard to the gear case using the two guard mounting
screws.
WARNING
If an incorrect or faulty guard is fi tted, this may cause serious
personal injury.
CAUTION
Some cutting attachment guards are equipped with sharp line
limiters. Be careful with handling it.
When using a trimmer head with two piece type cutting attachment
guard, attach the guard extension to the cutting attachment guard.
(Fig. 9)
NOTE
○ When attaching the guard extension to the cutting attachment
guard, the sharp line limiter must be removed from the cutting
attachment guard (if so installed).
○ To remove the guard extension, refer to the drawings. Wear
gloves as the extension has a sharp line limiter, then push the
three square tabs on the guard one by one in order. (Fig. 10)
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.
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
Code Type of
No. attaching 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 (12) on the case is no longer visible or
there is a hole in the bottom (13) of the button, change the new
parts immediately. (Fig. 11)
○ The cutting head must be securely mounted to the unit's gear
case.
○ For outstanding performance and reliability, always use Hitachi
nylon cutting line. Never use wire or other materials that could
become a dangerous projectile.
○ 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
).
-1
Direction of Size of
rotation attaching screw
Counterclockwise M10×P1.25-LH
3. Installation (Fig. 12)
○ Install cutting head on gear case of grass trimmers/brush
cutters. The mounting nut (14) is left-hand-threaded. Turn
clockwise to loosen/counterclockwise to tighten.
NOTE
○ Since the cutter holder cap is not used here, keep it for when a
metal blade is used, if so equipped.
Insert Allen wrench (15) into the hole of the gear case in order to
lock the cutter holder.
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. 13)
Also, you can extend the nylon line by hand but the engine must
be completely stopped. (Fig. 14)
○ Adjust the nylon line to the proper length of 11–14 cm before
each operation.
Installation of cutting blade (Fig. 15)
(If so equipped)
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.
NOTE
○ When installing cutter holder cap (16), be sure to set concave
side upward.
○ Insert the alien wrench (15) into the hole of the angle
transmission in order to lock the cutter holder (17). Please note
that the cutter fi xing bolt or nut (18) has left-handed threads,
(clockwise to loosen/ counter-clockwise to tighten). Tighten the
fi xing bolt or nut with the box wrench.
CAUTION
○ Before operation, make sure the blade has been properly
installed.
○ If your unit is equipped with protection cover under a cutting
blade, check it for wear or cracks before operation. If any damage
or wear is found, replace it, as it is an article of consumption.
○ You have to wear gloves when handling the cutting blade.
WARNING
For Hitachi heads or Hitachi alloy head, 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.

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. 16)
○ 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.