Fuel System - Husqvarna K 760 Workshop Manual

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FUEL SYSTEM

Fuel filter
Dismantle the filler cap.
502 50 83-01
Catch the fuel hose with the
help of tool 502 50 83-01.
Pull out the fuel filter. Check
that the filter is not cracked or
in any other way defective.
Fouled filters are replaced with
new ones.
Heavily fouled filters can be due
to fuelling with contaminated
fuel. Check and filter the fuel if
necessary.
Fuel hose
Pressure tester
Use the pressure tester to test
the tightness of the fuel hose.
Connect the adapter to the
pressure tester with a short hose.
501 56 27-01
Pressure test the fuel hose
Pump up the pressure to
approximately 7 psi/50 kPa.
Move to the next test if the
pressure drops.
Exclude the fuel hose as
the cause of leakage
Remove the carburettor unit.
Plug the hose by the carburettor
and redo the pressure test.
Fuel filter
Dismantle the filler cap and pull out the
section holding the filler cap in position
when fuelling.
Catch the fuel hose with the help of tool
502 50 83-01.
Pull out the hose a little through the
tank fill hole and pull out the fuel filter.
Check that the filter is not cracked or in
any other way defective. Fouled filters
must not be cleaned but replaced with
new ones. First lift up the metal ring
whereupon the hose can be pulled off the
filter.
If the filter is heavily fouled, this may be
due to the machine being filled with a
contaminated fuel. Drain the fuel and
filter when refilling.
Fuel hose
Pressure tester 501 56 27-01
Use the pressure tester 501 56 27-01 to
test the tightness of the fuel hose.
The pressure tester is supplied with an
adapter for small hose sizes, this should
be used on the fuel hose. Make the hose
between the adapter and the pressure
tester as short as possible.
Pressure test the fuel hose
Pump up the pressure to approxi mately
7 psi/50 kPa. A falling pres sure indicates
that the fuel hose leaks, the connection
to the carburettor leaks or the carburet-
tor is defective.
Exclude the fuel hose as the
cause of leakage
Remove the carburettor unit. Plug the
hose by the carburettor and redo the
pressure test. If the hose is in tact, the
carburettor must be checked.
115 32 40-26