TM 10-3950-672-24-2
Warning: The pressure of the fuel in the line is
sufficient to penetrate the skin and cause serious
bodily harm.
Use cardboard to check for cracks and leaks. With the
engine running, move the cardboard over the fuel lines
and look for fuel spray on the cardboard. Fuel leaks can
cause poor engine performance.
It is normal to have entrapped air in the fuel lines after
replacing the pump or the lines. Air in the lines will
cause the engine to run rough or produce a fuel knock.
Bleed the air from the high pressure line at the fitting
that connects the injector. Bleed one line at a time until
the engine runs smooth.
If the air cannot be removed, check the pump and
supply line for suction leaks.
Injectors
Caution: Use only injectors with number 2338
marked on the side as shown in illustration.
All engines use Robert Bosch, 7mm closed nozzles,
hole-type injectors. The last four digits of the Cummins
part number are used to identify the injectors.
5-80