Fuel Filter - Branson 6640C Operator's Manual

3. FUEL FILTER

DRAINING AIR IN FUEL LINE
Drain the air from the fuel tank, fuel filter, and fuel filter
element when the engine stops as the fuel runs out or
during maintenance.
1) Refill fuel to fuel tank.
2) Press top button of fuel filter until pressure is
formed, this allows air removal automatically.
Note) If air is not removed, then there will be air in
the fuel lines. Please check fuel lines for leakage or
breakage.
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