MAINTENANCE
Cooling system
To obtain the lowest possible running temperature the saw is equipped with a cooling system.
Winter use
During winter time, powder snow and cold weather can cause running problems, such as:
•Too low engine temperature.
•Icing on the air filter and carburettor.
Therefore some special measures are required:
The cooling system consists of:
1.Air intake on the starter unit.
2.Air guide plate.
3.Fan blades on the flywheel.
4.Cooling fins on the cylinder.
5.Cylinder cowling (supplies cold air over the cylinder).
5
4
3
2
1
•Partly reduce the air inlet of the starter and by doing that increase the engine temperature.
•Preheat the intake air to the carburettor by removing the special plug between the cylinder and the carburettor space.
The cylinder cover is made so it can be changed for running in cold weather. There is a possibility to make a hole in which, during the warmer part of the year, should be sealed using a plug.
Temperature 0oC (32oF) or colder
254
Model 254: Turn the cover lid so that the preheated air
Clean the cooling system with a brush once a week, more often in demanding conditions. A dirty or blocked cooling system results in the saw overheating which causes damage to piston and cylinder.
Centrifugal cleaning ”Air Injection”
Centrifugal cleaning means the following:
All air to the carburettor is carried through the starter. Dirt and dust is centrifuged away by the cooling fan.
IMPORTANT! In order to keep the function of the centrifugal cleaning, a continous maintenance and care must be made.
from the cylinder can pass into the carburettor area preventing for instance icing on the air filter.
Model 257, 262: Move the cover from position A to position B so that preheated air can pass from the cylinder to the carburettor space and prevent forma- tion of ice in the air filter. NOTE! When the cover is placed in the air nozzle it is important that the air nozzle seals hermetically to the cylinder cover.
Temperature -5oC (23oF) or colder
•Clean the air intake to the starter, the fan wings of the flywheel, the space around the flywheel, inlet pipe and carburettor space.
Heated handles
On the model XPG both the front handle and the rear handle are equipped with electrical heating coils. These are supplied with electricity from a
For running the saw in cold weather or powder snow, a special cover is available, which is mounted on the starter housing. This reduces the air flow and prevents large amounts of snow from being sucked in.
IMPORTANT! If a special winter kit is assembled or measures are taken to increase the engine temperature, a readjustment to normal setting has to be done when the saw is used under normal conditions. Otherwise, there is a risk of overheating, which can cause severe engine damage.
257, 262 |
electrical system. The switch for the heating coils is placed to the right of the rear handle. When the switch is pushed to the right, the heat is switched on. When it is pushed to the left, the heat is switched off.
Model 257, 262: When the cover is mounted in position A, it must be turned with the cut towards the air filter. To make a proper centrifugal cleaning possible, the air nozzle must seal hermetically to the crankcase and cylinder cover.
IMPORTANT! Any maintenance other than that described in this manual must be carried out by your servicing dealer.
32 – English
