Husqvarna K 1260 Workshop Manual page 22

FUEL SYSTEM
Check the fuel hose
Plug the hose by the carburettor
and redo the pressure test.
Fuel system hoses
Divide the machine at the anti-
vibration elements.
Replacing the fuel hose
The fuel hose is removed and
fitted in the same direction –
from the top to the tank filling.
Tank aeration
The unit is installed with a press-fit in the tank. The tank aeration has a dual-
action valve that allows air to enter the tank but prevents fuel from leaking
out. The valve opens at a pressure of about 20 kPa out from the tank, and
opens at an under-pressure of about 10 kPa in to the tank.
A sintered filter lets air pass through the valve slowly.
Fault indication
A sealed tank aeration manifests itself as follows: As the fuel tank empties
during operation, under-pressure arises in the tank reducing the fuel supply
and rendering the machine powerless. When the filler cap is opened you will
hear air being sucked in.
Dismantling
Use a screwdriver to push out the air vent from the tank.
Check the fuel hose
Detach the fuel hose at the carburettor
and plug the fuel hose. Repeat the pressure
test. If pressure can build up the hose is
intact and the carburettor must be
checked.
Fuel system hoses
To work with the fuel system's hoses, the
machine must be divided at the anti-
vibration elements, see Page 9.
Replacing the fuel hose
Remove the hose by pushing the hose
down into the tank, little by little, while
pulling it out through the tank filling.
The new hose is fed into the tank from
above by hand. Lubricate the hose to
facilitate installation.
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