Husqvarna 131R Workshop Manual page 32

9. Carefully lift up check valve (C) using your nails.
Clean the valve housing and make sure that the
channels are open. Carefully push the short sides of
the check valve (D) together to make sure that the
seals are not damaged. Replace the valve if the
seals are damaged.
D
10. Carefully remove the pump diaphragm and its
gasket. Examine the diaphragm for wear, where the
illustration show (A). Hold the pump diaphragm up to
the light to find holes in the material. Clean the fuel
screen (B). Replace the fuel screen if it is damaged.
Use a needle to remove the fuel screen.
B
A
A
11. Loosen the screw (A) and remove the lever, the
axle, the needle valve and the spring. Be careful to
prevent that the spring ejects.
A
12. Examine the lever arm and the needle valve for
wear.
32 - Repair instructions
C
13. Push out the seat of the needle valve for
a) Examine the connection points against the
control diaphragm for wear.
b) Examine the grooves for the needle valve for
wear.
c) Examine the top of the needle valve for wear.
d) Examine the groove for the lever arm for wear.
e) Replace damaged parts with new parts.
replacement. Use a correct punch Ø 4.5 mm.
A
B
Note: Replace the seat, needle valve and lever arm
at the same time. The seat of the needle valve must
be pressed in level with the carburetor housing. Use
a vise with soft jaw guards to prevent damage to the
seat of the needle valve.
675 - 002 - 23.04.2018