Hitachi Koki CG 25EUAP Bedienungsanleitung Seite 13

When to change the oil: When fi rst using the unit, after
approximately 10 hours of operation or after 1 month,
whichever occurs earlier; subsequently, after every 50 hours
of operation or every 6 months, whichever occurs earlier.
Specifi ed engine oil: Multigrade oil of classifi cation SAE 10W-
30
Engine oil capacity: 80 ml
1. Turn off the ignition switch.
2. Check that the fuel cap is securely tightened.
3. Remove the oil cap, tilt the unit so that the oil tank
opening is on the underside and drain the engine oil into
a container. (Fig. 29)
4. When all the engine oil has been drained, place the unit
horizontally on a clean, fl at surface.
5. Fill the oil tank with engine oil up to the mouth of the oil
tank opening. (Fig. 17)
6. Tighten the oil cap securely by hand.
NOTE
○ Do not dispose of waste engine oil with garbage or into
the ground.
Dispose of the oil according to the specifi ed method in
your area.
If you are unsure, contact the retailer where the oil was
purchased.
○ Fill the oil tank with the specifi ed amount of engine oil.
Too much or too little engine oil may result in engine
breakdown.
○ Engine oil deteriorates naturally even if unused.
Change the engine oil regularly.
Air fi lter (Fig. 30)
The air fi lter (30) 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.
Cleaning the air fi lter
Remove the air fi lter cover and the fi lter (28). Rinse it in
gasoline. 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. 31)
Remove the fuel fi lter (31) from the fuel tank, and replace it if
it is dirty.
NOTE
A blocked fuel fi lter (31) can prevent the supply of fuel and
cause a rotation malfunction of the engine.
Spark plug (Fig. 32)
The spark plug condition is infl uenced by:
○ An incorrect carburetor setting.
○ A dirty air fi lter.
○ Hard running conditions (such as cold weather).
○ Too much engine oil
These factors cause deposits on the spark plug electrodes,
which may result in malfunction and starting diffi culties. If
the engine is low on power, diffi 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.
Gear case (Fig. 33)
Check gear case or angle gear for grease level about every
50 hours of operation by removing the grease fi ller plug on
the side of gear case.
If no grease can be seen on the fl anks of the gears, fi ll the
gear case with quality lithium based multipurpose grease up
to 3/4. Do not completely fi ll the gear case.
CAUTION
○ Make sure to remove any dirt or grit when attaching the
plug to its original position.
○ Before attempting inspection or maintenance of the gear
case, make sure the case has cooled.
Semi-auto cutting head
Nylon line replacement
1. Remove the case (18) by fi rmly pushing inward the
locking tabs with your thumbs as shown in Fig. 34.
2. After removing the case, take out the reel and discard
the remaining line.
3. Fold the new nylon line unevenly (approx. 10 cm) in half
as shown in picture.
Hook the U-shaped end of the nylon line into the groove
(32) 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. 35)
4. Push each line into the stopper holes (33), leaving the
loose ends approx. 10 cm in length. (Fig. 36)
5. Insert both loose ends of the line through the cord guide
(34) when placing the reel in the case. (Fig. 37)
NOTE
When placing a reel in the case, try to line up the stopper
holes (33) with the cord guide (34) for easier line release
later.
6. Place the cover over the case so that the cap locking
tabs (35) on the cover meet the long holes (36) on the
case. Then push the case securely until it clicks into
place. (Fig. 38)
7. The initial cutting line length should be approx. 11–14 cm
and should be equal on both sides. (Fig. 39)
Blade (Fig. 40)
WARNING
Wear protective gloves when handling or performing
maintenance on the blade.
○ Use a sharp blade. A dull blade is more likely to snag and
thrust.
Replace the fastening nut if it is damaged and hard to
tighten.
○ When replacing blade, purchase one recommended by
Hitachi, with a 25.4 mm (one inch) fi tting hole.
○ In the case of a 3 tooth blade (37), it can be used on
either side.
○ Use the correct blade for the type of work.
○ When replacing blades, use appropriate tools.
○ When cutting edges become dull, re-sharpen or fi le
as shown in the illustration. Incorrect sharpening may
cause excessive vibration.
○ Discard blades that are bent, warped, cracked, broken
or damaged in any way.
NOTE
When sharpening blade it is important to maintain an
original shape of radius at the base of the tooth to avoid
cracking.
13
English