Hitachi CS 33EDT, Инструкция по эксплуатации

Страница: 13 / 116

English
13
CROSS CUTTING/BUCKING
Before starting to cut through the log, try to imagine what is going to
happen. Look out for stresses in the log and cut through it in such a
manner that the guide bar will not get pinched.
CROSS CUTTING LOGS, PRESSURE ON TOP
Take a fi rm stance. Begin with an upper cut. Do not cut too deeply,
about 1/3 of the log diameter is enough. Finish with a bottom cut.
The saw cuts should meet. ( Fig. 26 )
27. Relieving cut
28. Cross cut
29. Pressure on top
30. Pressure side
31. Tension side
32. Relative depth of saw cuts
THICK LOG, LARGER THAN GUIDE BAR LENGTH
Begin by cutting on the opposite side of the log. Pull the chain saw
towards you, followed by previous procedure. ( Fig. 27 )
If the log is lying on the ground make a boring cut to avoid cutting into
the ground. Finish with a bottom cut. ( Fig. 28 )
WARNING
KICKBACK DANGER
Do not attempt a boring cut if you are not properly trained. A
boring cut involves the use of the nose of the guide bar and can
result in kickback.
CROSS CUTTING LOGS, PRESSURE ON BOTTOM
Take a fi rm stance. Begin with a bottom cut. The depth of the cut
should be about 1/3 of the log diameter.
Finish with an upper cut. The saw cuts should meet. ( Fig. 29 )
33. Relieving cut
34. Cross cut
35. Pressure on bottom
36. Tension side
37. Pressure side
38. Relative depth of saw cuts
THICK LOG, LARGER THAN GUIDE BAR LENGTH
Begin by cutting on the opposite side of the log. Pull the chain saw
towards you, followed by previous procedure. Make a boring cut if
the log is close to the ground. Finish with a top cut. ( Fig. 30 )
WARNING
KICKBACK DANGER
Do not attempt a boring cut if you are not properly trained. A
boring cut involves the use of the nose of the guide bar and can
result in kickback. ( Fig. 31 )
IF THE CHAIN SAW GETS STUCK
Stop the engine. Raise the log or change its position, using a thick
branch or pole as a lever. Do not try to pull the chain saw free. If you
do, you can deform the handle or be injured by the saw chain if the
chain saw is suddenly released.
MAINTENANCE
Carburetor adjustment (Fig. 32)
In the carburetor, fuel is mixed with air. When the engine is test run at
the factory, the carburetor is 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 (counterclockwise) 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 Authorized Service Centers.
WARNING
When the engine is idling the cutting attachment must under no
circumstances rotate.
NOTE
Do not touch the High speed adjustment (H) and the Low speed
adjustment (L).
Those are only for Hitachi Authorized Service Centers.
If you rotate them, it will cause a serious damage to the machine.
Air fi lter (Fig. 33)
The air fi lter (41) and cleaner sponge (40), (42) 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.
Remove the air fi lter cover (39) and the cleaner sponge (40). Turn the
air fi lter (41) 20° counter-clockwise and remove. Then remove the
cleaner sponge (42).
Rinse them 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.
Spark plug (Fig. 34)
The spark plug condition is in fl uenced by:
○
An incorrect carburetor setting.
○
Wrong fuel mixture (too much oil in the gasoline)
○
A dirty air fi lter.
○
Hard running conditions (such as cold weather).
These factors cause deposits on the spark plug electrodes, which
may result in malfunction and starting di ffi culties. If the engine is
low on power, di ffi 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. Readjust 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.
Oiler port (Fig. 35)
Clean the chain oiler port (43) whenever possible.
Guide bar (Fig. 36)
Before using the machine, clean the groove and oiler port (44) in the
guide bar.
Side case (Fig. 37)
Always keep the side case and drive area clean of saw dust and
debris. Periodically apply oil or grease to this area to protect from
corrosion as some trees contain high levels of acid.
NOTE
Pull up the front hand guard towards you and release the brake
to remove or install the side case.
Fuel fi lter (Fig. 38)
Remove the fuel fi lter from the fuel tank and thoroughly wash it in
solvent. After that, push the fi lter into the tank completely.
NOTE
If the fuel fi lter (45) is hard due to dust and dirt, replace it.
Chain oil fi lter (Fig. 39)
Remove the oil fi lter and thoroughly wash it in solvent. After that,
push the fi lter into the tank completely.
NOTE
If the oil fi lter (46) is hard due to dust and dirt, replace it.
000Book̲CS33EDT̲EE.indb 13 000Book̲CS33EDT̲EE.indb 13 2013/06/24 15:55:50 2013/06/24 15:55:50