Husqvarna 324HDA, Workshop Manual

Page: 18 / 49

17
3
Fuel system
A
B
Lift up the non-return valve (C) and
check that the seals are intact.
Clean the valve housing.
Carefully lift up non-return valve (C)
using your nails.
Clean the valve housing and check that
the channels are open.
Check that the non return valve’s seals
(D) are undamaged by carefully
squeezing the short sides together.
Replace the valve if necessary.
Remove the pump diaphragm to check
for wear and damage.
Clean or replace the fuel screen (1).
Carefully remove the pump diaphragm
and its gasket.
Check the diaphragm for wear to the
valve flaps (2). Hold it, for example, up
to the light to discover holes in the
material.
Clean the fuel screen (1). Remove it for
replacement if necessary using a
needle.
NOTE!
Do not lose the conical spring (A) that sits between pump diaphragm and the
carburettor housing and the small filter disc (B) between carburettor housing
and the needle valve guide (also see the exploded view on page 19).
Dismantle the lever arm and needle
valve to check for wear and
replacement if necessary. Loosen the screw and lift off the lever,
axle, needle valve and spring.
Exercise care so that the spring does
not fly out.