Husqvarna K1270 II Workshop Manual page 34

6.5.5 To install the fuel hose
1. Push the fuel hose down in the tank. At the same
time, pull the fuel hose out from the hole for the fuel
tank cap.
2. Attach the weight and the fuel filter.
6.5.6 Function of the tank venting
The fuel tank has a check valve that lets air enter the
tank, but prevents fuel from running out. The filter lets air
through slowly.
6.5.7 Tank air flow fault indication
If the tank air flow is blocked and the engine is running,
the tank will have low pressure. This decreases fuel
34 - Repair and servicing
supply and the power. When you open the fuel tank cap
you will hear the sound of air suction. A clogged filter
must not be blown clean, but replaced.
6.5.8 To remove the filter for the fuel tank venting
• Remove the check valve and then the filter for the
fuel tank venting with a pair of pliers.
6.5.9 Function of the air purge bulb
B
A
Hose (A) is connected to the carburetor. When you push
the air purge bulb, a vacuum is caused and fuel fills the
fuel chamber. When the fuel chamber is fully filled,
unwanted fuel is pushed to the tank through return hose
(B). This means that the fuel level in the carburetor does
not become too high.
6.5.10 To do a test of the air purge bulb
A Husqvarna test instrument for fuel lines and check
valves is necessary. Refer to
on page 12 .
Servicing tools overview
1273 - 001 - 04.11.2019