20
Checking the spark plugs
Danger!
The ignition system generates an
electromagnetic field.
Wearers of pacemakers must not
work on live parts.
Soiled spark plugs reduce the engine output.
Clean the electrode of the spark plug with a
brass wire brush. Check the electrode gap
(see operating instructions of the engine manu-
facturer). Make sure that the insulator around
the electrode is not damaged. Never use a
damaged spark plug.
Tighten the spark plug using the correct torque
(see operating instructions of the engine manu-
facturer).
Maintaining the air filter
Danger!
Cleaning agents pose a fire and
explosion hazard.
Never clean the air filter with flam-
mable solvents.
Make sure that the air filter is always clean. A
dirty air filter reduces the engine performance
and leads to increased engine wear and fuel
consumption. Irrespective of the operating
hours, change the filter insert at least once a
year. Do not operate the engine without air
filter.
For this, observe the attached operating in-
structions of the engine.
Checking the drive
1. Put the device on a non-slip surface (e.g.
concrete or asphalt).
2. Switch off the engine.
3. Set the switching lever to a forward gear.
4. Actuate the drive lever.
5. Try to pull the device backwards.
If the rear wheels lock, the drive is correctly
adjusted. If you can pull the device, the drive
must be re-adjusted.
1
Re-adjusting the drive
Turn the adjusting screw (
1
) at the drive so that
the wheels lock, while the drive is actuated,
when the device is pulled. If there is no im-
provement after the adjustment, have the
device checked by an authorised service
centre.
Checking the parking brake
1. Put the device on a non-slip surface (e.g.
concrete or asphalt).
2. Switch off the engine.
3. Switch the switching lever to neutral posi-
tion.
4. Try pulling the device backwards.
If the rear wheel lock, the parking brake is
correctly adjusted. If the device can be easily
pulled backwards, the parking brake must be
re-adjusted. Contact an authorised service
centre to do so.
Summary of Contents for AS 65 4T
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