Hitachi CG 25EUS L, Инструкции по безопасности и руководство пользователя, Страница: 11 / 48

Fig. 20
MAINTENANCE
MAINTENANCE, REPLACEMENT OR REPAIR
OF THE EMISSION CONTROL DEVICES AND
SYSTEMS MAY BE PERFORMED BY ANY NON-
ROAD ENGINE REPAIR ESTABLISHMENT OR
INDIVIDUAL.
Carburetor adjustment (Fig. 21)
T
Fig. 21
WARNING
● The cutting attachment may be spinning
during carburetor adjustments.
● Never start the engine without the complete
fan case and tube assembled! Otherwise the
clutch can come loose and cause personal
injuries.
In the carburetor, fuel is mixed with air. When the
engine is test run at the factory, the carburetor is
basically adjusted. A further adjustment may be
required, according to climate and altitude. The
carburetor has one adjustment possibility:
T = Idle speed adjustment screw.
Idle speed adjustment (T)
Check that the air fi lter is clean. When the idle speed
is correct, the cutting attachment will not rotate. If
adjustment is required, close (clockwise) the T-screw,
with the engine running, until the cutting attachment
starts to rotate. Open (counter-clockwise) the screw
until the cutting attachment stops. You have reached
the correct idle speed when the engine runs smoothly
in all positions well below the rpm when the cutting
attachment starts to rotate.
If the cutting attachment still rotates after idle speed
adjustment, contact HITACHI dealer.
NOTE
Standard idle rpm is 3,000/min.
WARNING
When the engine is idling the cutting
attachment must under no circumstances
rotate.
NOTE
Some models sold areas with strict exhaust
emission regulation do not have high and low
speed carburetor adjustments. Such adjustments
may allow the engine to be operated outside of
their emission compliance limits. For these models,
the only carburetor adjustment is idle speed.
Changing the engine oil
Dirty engine oil will considerably reduce the service
life of the engine. Check and change the engine oil
regularly.
CAUTION
●
To avoid risk of burn injury, 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.
Speci fi ed engine oil: Multigrade oil of classi fi cation SAE
10W-30
Engine oil capacity: 4.88 cu. in. (80 ml)
1. Turn o ff 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. 22)
11
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