Needle Bearing Lubrication; Adjustment Of The Oil Pump; Cooling System; Air Injection" Centrifugal Cleaning - Husqvarna Rancher 455 Operator's Manual

Needle bearing lubrication

The clutch drum has a needle bearing on the output shaft.
This needle bearing must be lubricated regularly (once a
week).
When lubricating, remove the clutch cover by loosening the
two bar nuts. Lay the saw on its side with the clutch drum
upwards.
Lubrication involves engine oil dripping into the centre of the
clutch drum as it rotates.

Adjustment of the oil pump

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 position 2. 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": Position 1
Bar 15"-18": Position 2
Bar 18"-20": Position 3
These recommendations apply to Husqvarna's chain oil, for
other chain oils increase the oil flow by one step.
WARNING! The engine must be stopped
!
when making adjustments.
MAINTENANCE

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.
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.

"Air Injection" centrifugal cleaning

Centrifugal cleaning means the following: All air to the
carburetor passes through the starter. Dirt and dust is pushed
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 carburetor compartment.
– 35
English