Husqvarna K 760 Workshop Manual page 20

FUEL SYSTEM
Changing the fuel hose
Loosen the cable lug to the stop switch to gain better access to the fuel hose.
Remove the hose from the tank at the same time as it is fed down through the
hole in the carburettor compartment
little by little.
The new hoses is fed down into the tank from the carburettor compartment.
Feed down the hose by hand or with the help of a pair of pliers. Greasing the
hoses facilitates assembly.
Note how the fuel hose is suspended on the tank unit when assembling.
The snap lock for the hose holder can be opened with a small screwdriver
from the outside of the tank unit.
Do not forget to refit the cable lug on the stop switch!
Tank venting
The tank vent has a non-return valve that permits air to enter the tank, but
prevents fuel from running out. The sintered metal filter permits air to pass
slowly.
Fault indication
Blocked tank vent is shown as follows: As the fuel tank is emptied during use
an underpressure is created in the tank, which reduces the fuel supply – the
machine lacks power. When filler cap is opened air suction is audible.
Dismantling
Dismantle the carburettor unit
and choke control.
Press up the air vent unit with a
pair of pliers.
Filter - functional test
Observe whether the air can
slowly pass through the filter.
Filter replacement
Clogged filters should not be
blown clean but replaced.
Dismantling
The carburettor unit must be dismantled
to gain access to the tank vent.
Remove the choke control.
Press the air vent unit backwards and
push it up with some pliers.
Filter – functional test
Pull off the rubber hose with the sintered
filter. Blow through the hose and note
whether the air can pass through slowly.
Filter replacement
A clogged filter should not be blown
clean but replaced. Use a pin punch to
push out the filter out of the hose.
Push in a new filter.
9
20