Fuel Drain Manifold; Fuel System Replacement Procedures - Dodge D250 1990 Service Manual

Fuel System Replacement Procedures
Page 14-14
Fuel System
DODGETurbo Diesel
Fuel Drain Manifold
The fuel system Is designed to use fuel to cod and lubricate
the injection pump and injectors. Fuel is continually vented
from the injection pump and a small amount of fuel leaks by the
injector needle valve during injection. This fuel is returned to
the supply tank by the fuel drain manifold.
^ ] Restricting the fuel drain manifold raises the case pressure of
the injection pump which can prevent injection.
If the engine will restart after a waiting period following an
unexplained shut down, look for a restriction of the manifold
drain line.
Note: Restriction can cause the fuel temperature to rise
reducing power from the engine.
Fuel System Replacement Procedures
A certain amount of air will be entrapped In the system during
replacement of any of the system components. After
replacement of a component, bleed the system according to
the following procedure.