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18 – English
MAINTENANCE
Spark plug
The spark plug condition is influenced by:
• Incorrect carburettor adjustment.
• An incorrect fuel mixture (too much or incorrect type of
oil).
• A dirty air filter.
These factors cause deposits on the spark plug electrodes,
which may result in operating problems and starting
difficulties.
If the machine is low on power, difficult to start or runs poorly
at idle speed: always check the spark plug first before taking
any further action. If the spark plug is dirty, clean it and check
that the electrode gap is 0.5 mm. The spark plug should be
replaced after about a month in operation or earlier if
necessary.
CAUTION! Always use the recommended spark plug type!
Use of the wrong spark plug can damage the piston/cylinder.
Gear housing
There is a grease nipple on the gearbox. Use a grease gun to
top up with grease. This should be carried out after
approximately every 20 working hours. Use Husqvarna
special grease, No. 503 98 96-01.
CAUTION! The gear housing must not be filled completely
with grease. The grease expands as the machine heats up
during operation. If the gear housing was completely filled
with grease it could damage the seals and lead to leakage of
grease.
The grease in the bevel gear does not normally need to be
changed except if repairs are carried out.
Cleaning and lubrication
After you have used the machine clean any resin and plant
residue from the blades using cleaning agent 531 00 60-75
(UL22).
Always lubricate the blade bars with special grease, part no.
531 00 60-74 (UL 21) before use.
Maintenance schedule
Below you will find some general maintenance instructions. If
you need further information please contact your service
workshop.
Daily maintenance
1 Clean the outside of the machine.
2 Check that the components of the throttle control work
safely. (Throttle lock and throttle control.)
3 Check that the stop switch works correctly.
4 Check that the blades do not move when the engine is
idling or when the choke is in the start throttle position.
5 Clean the air filter. Replace if necessary.
6 Check that the cutter and cutter guard are not damaged or
cracked. Replace the cutter or cutter guard if they have
been exposed to impact or if they are cracked.
7 Check that nuts and screws are tight.
8 Check that there are no fuel leaks from the engine, tank or
fuel lines.
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