Hitachi Koki CG 25EUS Instrucciones De Manejo página 12

English
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.
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. 25)
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. 16)
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. 26)
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.
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. 27)
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.
NOTE
If element is hard due to excessive dirt buildup, replace it.
Spark plug (Fig. 28)
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,
12
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.
Angle transmission (Fig. 29)
Check angle transmission or angle gear for grease level about
every 50 hours of operation by removing the grease fi ller plug on
the side of angle transmission.
If no grease can be seen on the fl anks of the gears, fi ll the
transmission with quality lithium based multipurpose grease up to
3/4. Do not completely fi ll the transmission.
Semi-auto cutting head
Nylon line replacement
(1) Remove the case (23) by fi rmly pushing inward the locking tabs
with your thumbs as shown in Fig. 30.
(2) After removing the case, take out the reel and discard the
remaining line.
(3) Fold the new nylon line unevenly in half as shown in picture.
Hook the U-shaped end of the nylon line into the groove (24) 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. 31)
(4) Push each line into the stopper holes (25), leaving the loose
ends approx. 10 cm in length. (Fig. 32)
(5) Insert both loose ends of the line through the cord guide (26)
when placing the reel in the case. (Fig. 33)
NOTE
When placing a reel in the case, try to line up the stopper holes
(25) with the cord guide (26) for easier line release later.
(6) Place the cover over the case so that the cap locking tabs on
the case meet the long holes on the cover. Then push the case
securely until it clicks into place. (Fig. 34)
(7) The initial cutting line length should be approx. 11–14 cm and
should be equal on both sides. (Fig. 35)
Blade (Fig. 36)
WARNING
Wear protective gloves
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 (27), 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.
Maintenance schedule
Below you will fi nd some general maintenance instructions. For
further information please contact Hitachi Authorized Service
Centers.
when handling or performing