Tanaka TBC-290 Mode D'emploi page 14

may result in malfunction and starting difficulties. If the engine
is low on power, difficult to start or runs poorly at idling speed,
always check the spark plug first. If the spark plug is dirty, clean it
and check the electrode gap. Re-adjust 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.
Angle transmission (Fig. 31)
Check angle transmission or angle gear for grease level about
every 50 hours of operation by removing the grease filler plug on
the side of angle transmission.
If no grease can be seen on the flanks of the gears, fill the
transmission with quality lithium based multipurpose grease up to
3/4. Do not completely fill the transmission.
Blade (Fig. 32)
WARNING!
Wear protective gloves when handling or performing
maintenance on the blade.
• Use a sharp blade. A dull blade is more likely to snag and thrust.
Replace the fastening nut if it is damaged and hard to tighten.
• When replacing blade, purchase one recommended by Tanaka,
with a 25.4mm (one inch) fitting hole.
• When installing saw blade (2), always face the stamped side up.
In the case of a 4 tooth blade (1), it can be used on either side.
• Use correct blade for the type of work.
• When replacing blade, use appropriate tools.
• When cutting edges become dull, re-sharpen or file as shown in
figure. Incorrect sharpening may cause excessive vibration.
• Discard blades that are bent, warped, cracked,
broken or damaged in any way.
NOTE!
When sharpening blade it is important to maintain an original shape
of radius at the base of the tooth to avoid cracking.
Maintenance schedule
Below you will find some general maintenance instructions. For
further information please contact Tanaka dealer.
Daily maintenance
• Clean the exterior of the unit.
• Check that the harness is undamaged.
• Check the blade guard for damage or cracks. Change the guard
in case of impacts or cracks.
GB-8
• Check that the cutting attachment is properly centred, sharp, and
without cracks. An off- centred cutting attachment induces heavy
vibrations that may damage the unit.
• Check that the cutting attachment nut is sufficiently tightened.
• Make sure that the blade transport guard is undamaged and that
it can be securely fitted.
• Check that nuts and screws are sufficiently tightened.
Weekly maintenance
• Check the starter, especially cord.
• Clean the exterior of the spark plug.
• Remove the spark plug and check the electrode gap. Adjust it
to 0.6 mm or change the spark plug.
• Check that the air intake at the starter is not clogged.
• Check that the angle gear is filled with grease up to 3/4.
• Clean the air filter.
Monthly maintenance
• Rinse the fuel tank with gasoline, and clean fuel filter.
• Clean the exterior of the carburetor and the space around it.
Quarterly maintenance
• Clean the cooling fins on the cylinder.
• Clean the fan and the space around it.
• Clean the muffler of carbon.
CAUTION
Cleaning of cylinder fins, fan and muffler shall be done by a
Tanaka Authorized dealer.