ARMY TM 9-6115-670-14&P
5-40
raise fuel pressure.
h. Observe fuel pressure. If fuel pressure does not reach 2133 psi (14.71 MPa), replace injector
pump.
i. If fuel pressure reaches 2133 psi (14.71 MPa), measure the length of time it takes to drop to
1991 psi (140 13.73 MPa). If pressure drops to 1991 psi (13.73 MPa) in less than 5 seconds,
replace the injector pump.
j. Repeat steps c. through i. for fuel injection pump outlets to fuel pipes (13) and (14).
ADJUST
a. Remove 10 kW alternator from APU (para 5.24.).
b. Remove fuel line from injection pump (3) (para 4.35.).
c. Install a fuel supply to the injection pump (3).
d. Set speed control lever to maximum fuel discharge position.
e. Turn flywheel (19) by turning retaining nut on crankshaft pulley until fuel fills up to the hole of
the delivery valve holder (14).
f. Continue to turn flywheel (19) until fuel overflows. Stop turning.
g. Observe timing mark on (20) flywheel (19). If it does not line up with timing hole (21) in bell
housing, remove injection pump (3) and remove or install injection pump shims (17) until marks
line up.
NOTE
Use this procedure to adjust injection pump timing.
Injection pump timing may be required when blue or
black exhaust smoke is observed, low engine power, or
engine will not start.
