Scheppach HTH250P Original Anleitungen Seite 26

To obtain good cutting results the free motion between
the blades and the sword must be correctly adjusted.
For this proceed as follows:
1. Loosen the nuts (A) on the top surface of the
cutting device.
2. Slightly tighten the screws (B) on the underside (if
required loosen them previously).
3. Turn the screw back anticlockwisely by a quarter
up to a half turn.
4. Use a screwdriver to hold the screw and firmly
tighten the nuts.
The sliding play is correctly adjusted if the washer un-
der the screw head can just be freely moved back and
forth by hand.
5. Lubricate the cutting device using environmental-
compatible lubricating oil.
If the play is too small, this may cause a great extent of
heating and thus damage to the device.
Lubricating the gearbox
Lubricate the gearbox every 10 to 20 operating hours.
1. Put the grease gun onto the zerk fitting (10).
2. Force some grease into the zerk fitting.
Adjusting the idle speed
If the cutting device continues to run while the engine
idles, you have to correct the idle speed.
1. Allow the engine to run warm for 3-5 minutes (no
high speed).
2. Turn the adjusting screw (C):
clockwisely
- idle speed increases (+)
counterclockwisely
- idle speed decreases (–)
Contact the manufacturer if the cutting device still conti-
nues to run in idle mode.
Do not continue working with the hedge trimmer in such
a condition.
Cleaning / replacing the air filter
Clean the air filter from dust and dirt on a regular basis
to prevent
- starting problems,
- loss of output,
- too high fuel consumption.
Clean the air filter every 8 operating hours, or more
frequently in dusty environments.
1. Put the choke (4) to „cold start" to prevent dirt
particles from coming into the carburettor.
2. Remove the air filter cover (8).
3. Remove the air filter (D).
4. Wash the air filter in a luke warm soapy solution.
Do not blow out dirt particles, otherwise there is a
risk of eye injury.
5. Clean the air filter interior using a brush.
6. Allow the air filter to dry well and reinsert it.
7. Re-mount the air filter cover.
Replace the air filter on a regular basis.
Damaged air filters must be replaced without delay.
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Cleaning/replacing the fuel filter
Check the fuel filter (E) if required. A contaminated fuel
filter restricts the fuel supply.
Open the tank cap (12) and pull the fuel filter through
the opening using a wire hook.
• Slight contamination:
- Pull the fuel filter from the fuel line and clean it in
petroleum ether.
• Bad contamination:
- Replace the fuel filter.
Checking / replacing the spark plug
Do not touch the spark plug (F) or the spark plug con-
nector (16) when the engine runs. High voltage!
Risk of burning on the hot engine. Wear protective
gloves.
Check the spark plug and the spark gap on a regular
basis.
For this proceed as follows:
1. Pull the spark plug connector from the spark plug.
2. Remove the spark plug using the supplied spark
plug wrench.
The spark gap must be 0.6 to 0.7 mm.
Clean the spark plug when it is contaminated.
Replace the spark plug:
- once in a month if the device is often used
- when the insulating body is damaged,
- when the electrodes show excessive erosion,
- when the electrodes show excessive dirt or oil.
Checking the ignition spark
1. Pull the spark plug connector from the spark plug.
2. Remove the spark plug using the supplied spark
plug socket spanner.
3. Remove the spark plug.
4. Firmly connect the spark plug connector.
5. Use an insulated pair of tongs to press the spark
plug against the engine body (away from the spark
plug hole).
6. Slide the ON/OFF switch to the position „I„.
7. Firmly pull the cranking rope on the cranking
handle.
• A spark between the electrodes is a sign of proper
functioning.
Silencer / exhaust outlet
Do not retighten the silencer screws when the engine
is hot.
1. Check the tight seat of the screws (G) on the silen-
cer (H) on a regular basis.
- If they are loose, tighten them hand-tight.
2. Clean the exhaust outlet (K) on a regular basis.
Care
Clean the hedge trimmer thouroughly after each appli-
cation so that the faultless function is kept.
Wear protective gloves when cleaning the cutting
device.
• Clean the case with a soft brush or a dry cloth.
Water, solvents and polishing agents shall not be
applied.
• Check that the ventilation slots for the motor cooling
are free (risk of overheating).