Adjustment Of The Oil Pump; Cooling System; Air Injection" Centrifugal Cleaning; Winter Use - Husqvarna 555 Operator's Manual

Lubrication involves grease being squirted into the centre
of the crankshaft using a grease gun.

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 with
the screw set to middle position. Turning the screw
clockwise will reduce the oil flow and turning the screw
anti-clockwise will increase the oil flow.
+
Recommended settings:
Bar 13"-15": Minimum flow
Bar 16"-18": Medium flow
Bar 20"-28": Maximum flow
WARNING! The engine must not be
!
running when making adjustments.

Cooling system

To keep the working temperature as low as possible the
machine is equipped with a cooling system.
The cooling system consists of:
1 Air intake on the starter.
2 Air guide plate.
34 – English
MAINTENANCE
–
3 Fins on the flywheel.
4 Cooling fins on the cylinder.
5 Cylinder cover (directs cold air over the cylinder).
Clean the cooling system with a brush once a week, more
often in demanding conditions. A dirty or blocked cooling
system results in the machine overheating which causes
damage to the piston and cylinder.
Note! The cooling system on a chain saw with catalytic
converter must be cleaned daily. This is particularly
important on chain saws with catalytic converters,
because the higher exhaust temperature requires efficient
cooling of the engine and the catalytic converter unit.
"Air Injection" centrifugal
cleaning
Centrifugal cleaning means the following: All air to the
carburettor passes through the starter. Dirt and dust is
centrifuged out by the cooling fan.
IMPORTANT! In order to maintain operation of the
centrifugal cleaning system it must be regularly
maintained. Clean the air intake to the starter, the fins on
the flywheel, the space around the flywheel, inlet pipe and
carburettor compartment.

Winter use

Running problems can occur when using the machine in
the cold and snowy conditions caused by:
• Too low engine temperature.
• Icing of the air filter and carburettor.
Special measures are therefore often required:
• Partly mask the air inlet on the starter to increase the
working temperature of the engine.
• Preheat the intake air to the carburettor by using the
heat from the cylinder.