High Pressure Fuel Lines - Dodge D250 1990 Service Manual

Fuel System
DODGE Turbo Diesei
Fuel System Malfunction - Diagnosis
Page 14-11
Caution: The flange of a replacement pump will not have an
alignment mark. After the replacement pump is installed,
mark the flange to correspond with the mark on the gear
housing.
During production, after the locked pump is fitted to the engine
with Cylinder Number 1 at TDC, a mark is stamped on the gear
housing and the pump flange. Thereafter, when these marks
are aligned, the pump Is correctly timed to the engine.
Note: The marks on the gear housing and the pump flange are
unique to each engine.
A special indicator can be used to measure the position of the
pump plunger to check pump timing.
High Pressure Fuel Lines
Caution: The high p r e s s u r e lines must be clamped
securely and routed so they do not contact each other or
any other component. Do not weld or substitute lines.
Use only the specified part number for the engine. An
attached metal tag is used to identify each line with a
part number.
High pressure fuel lines are designed and manufactured to
deliver fuel at injection pressure to the injectors. The high
pressure pulses will cause the lines to expand and contract
during the injection cycle. The length, internal size and rigidity
of the lines is critical to smooth engine operation.
Warning: A fuel leak from high pressure fuel line h a s
sufficient p r e s s u r e to penetrate the skin and c a u s e
serious bodily harm.
Use a piece of cardboard to check for fuel leaks. With the
engine running, move the cardboard over the fuel lines and
look for fuel spray on the cardboard. Fuel leaks ran cause poor
engine performance.