TM 5-2420-230-24-2
B3.9 and B5.9 Series Engines
Fuel Pump Timing (005-037)
Section 5 - Fuel System - Group 05
Page 5-63
At the point of injection, the keyway of the shaft will align
with the delivery valve receiving the injection and the il-
lustrated hash mark on the seal housing.
NOTE: The illustrated mark is for reference only and should
not be used for setting the fuel injection pump timing.
The No. 1 cylinder delivery valve is marked as illustrated.
Four cylinder = A
Six cylinder = D
Firing Order
Four Cylinder
Six Cylinder
A =1
D=1
B=3
E=5
C=4
F=3
D=2
A=6
B=2
C=4
The engine is equipped with an engine timing pin to locate
top dead center (TDC) for cylinder No. 1.
CAUTION
If the timing pin is incorrectly located on the gear hous-
ing, the pump will not be timed correctly.
After precisely locating TDC for cylinder No. 1, the factory
positions the timing pin assembly to the gear housing using
the timing pin and the hole in the camshaft gear. If the gear
housing or timing pin assembly are removed, the same
precision is required to relocate it.
If the timing pin assembly is incorrectly located, reposition
the timing pin.
L-923
