Doosan DA40 - Overflow valve

Engine
SHOP MANUAL
Ch 1 page 21
Overflow valve
The overflow valve controls the pressure downstream of the injector in the fuel system.
The normal operating pressure downstream of the injector is 0.7 bar.
The overflow valve uses a duct in the fuel manifold to recirculate return fuel to the fuel filter, which
returns the fuel to the fuel tank via a duct.
Figure 33
Figure 32
Figure 34