MAINTENANCE
Muffler
The muffler is designed to reduce the noise level and to direct the exhaust gases away from the operator. The exhaust gases are hot and can contain sparks, which may cause fire if directed against dry and combustible material.
Some mufflers are equipped with a special spark arrestor mesh. If your machine has this type of muffler, you should clean the mesh at least once a week. This is best done with a wire brush.
CAUTION! The mesh must be replaced if it is damaged. If the mesh is blocked the machine will overheat and this will cause damage to the cylinder and piston. Never use a machine with a muffler that is in poor condition.
Needle bearing lubrication
The clutch drum is fitted with one of the following drive sprockets:
•A Spur sprocket (the chain sprocket is welded on the drum)
•B Rim sprocket (replaceable)
Both versions have a needle bearing on the drive shaft, which has to be greased regularly (once a week).
CAUTION! Use only high quality bearing grease or engine oil.
Adjustment of the oil pump
The oil pump is adjustable. Adjustments are made by turning the screw using a screwdriver or combination spanner. The machine is supplied from the factory set to 1 turn open. Turning the screw clockwise will reduce the oil flow and turning the screw
WARNING! The engine must not be running
!when making adjustments.
Recommended settings:
Bar
Bar
Bar
Bar 42" and longer: 1 3/4 turns from the closed position.
These recommendations apply to Husqvarna’s chain oil, for other chain oils increase the oil flow by one step.
Extra chain oil
Under EXTREME conditions the chain and bar may require extra chain oil. The oil flow should only be increased when the engine is running and the chain rotating. Push the lever to the right, where it will automatically be held in the locked position. Press in the lever button to release it.
Note: It is not necessary to pump continuously. When the extra oil flow has been activated oil consumption increases by
32 – English
