Maintenance - Hitachi Koki CH 22EAP2 Instrucciones De Manejo

English
○ The throttle lever cannot be engaged if the handle is not
secured (the lock lever is pressed).
To rotate the handle; push the lock lever (6) allowing the handle
to turn. Rotate the handle to the desired 0°, 45° or 90° locking
position and release the lock lever (6) to lock the handle in
place.
D: LOCK
E: UNLOCK
Stopping (Fig. 8)
Decrease engine speed, and push stop switch to stop position (F).
NOTE
If the engine does not stop, it can be forced to stop by rotating
the choke lever to the choked position.
Before restarting the engine, ask Hitachi Authorized Service
Centers for repairs.

MAINTENANCE

MAINTENANCE, REPLACEMENT OR REPAIR OF THE EMISSION
CONTROL DEVICES AND SYSTEM MAY BE PERFORMED
BY ANY NONROAD ENGINE REPAIR ESTABLISHMENT OR
INDIVIDUAL.
Carburetor adjustment (Fig. 9)
WARNING
○ The cutting attachment may be spinning during carburetor
adjustments.
○ Never start the engine without the complete clutch cover.
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 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.
Air fi lter (Fig. 10)
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 cleaner cover and the fi lter. 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 by a new one. A damaged fi lter must
always be replaced.
NOTE
Saturate the element in 2-cycle oil or the equivalent. Squeeze
the element to distribute the oil completely and to remove any
excess oil.
8
Spark plug (Fig. 11)
The spark plug condition is infl 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 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. 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 the same type of spark
plug for replacement.
Cutter blade (Fig. 12)
The blades are installed to the cutter guide with the four or fi ve
bolts. Those bolts are tightened with a clearance so that the cutters
can move smoothly.
When clearance is too small
The cutters do not move properly and the sliding surfaces may
seize.
When clearance is too large
The cutters are poor in sharpness.
To adjust the cutter clearance
1. Loosen the cutter fi xing nuts.
2. Fully tighten the cutter fi xing bolts and then loosen them
approx. 5/8 turn.
3. With the bolts set at that position, tighten the cutter fi xing nuts.
Be sure to replace cutter guide fi xing bolts when they are loosened,
worn or damaged. Also be sure to replace damaged cutter blade.
Lubricating the blade (Fig. 13)
During trimming, sap adhering to the blade edge will increase load.
Use machine oil (or bicycle oil or the like) to lubricate the blade and
wipe the blade with a cloth. To prevent the blade from rusting, be
sure to lubricate the blade after use and when it will not be used for
an extended period of time before placing it in the blade case.
Gear case (Fig. 14)
Apply a good quality lithium based grease through the grease fi tting
until a small amount comes out between the cutting blades and the
gear case. Lubricate the grease from the grease nipple (indicated
by an arrow) next to the gear case using a commercially available
cartridge grease gun.
NOTE
Lubrication should be applied 3g at 20 hour intervals and more
frequently with heavy use.
Fuel fi lter (Fig. 15)
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 fi lter is hard due to dust and dirt, replace it.
Cleaning the cylinder fi ns (Fig. 16)
When leaves get caught between cylinder fi ns (7), the engine may
overheat, resulting in lower output. To avoid this, always keep
cylinder fi ns and cylinder cover clean.
Every 100 operating hours, or once a year (more often if conditions
require), clean fi ns and external surfaces of engine of dust, dirt and
oil deposits which can contribute to improper cooling.