4-4. FUEL INJECTION PUMP - REPLACE (Contd)
New and reconditioned fuel injection
pumps come with drive shafts locked at
an angle which aligns shaft key with
keyway in drive gear. Screw (23) is
tightened against shaft to lock shaft.
Do not loosen screw (23) until
instructed to do so in STEP h, below.
b. Position fuel injection pump (19)
on mounting studs, using care to
prevent key (30) from dropping into
timing gear housing while aligning
key (30) with keyway in gear.
c. Install three nuts (28) finger
tight on pump mounting studs. Pump
must be free to move until timing
has been set.
d. Install new lockwasher (26) and nut (25).
e. If original pump is being
installed, rotate pump to align
scribe marks (B). Then tighten
three nuts (28) to 18 lb. ft.
f. If installing a new or rebuilt
pump without scribe mark, rotate
pump against direction of drive
rotation to take up backlash in
gearing and tighten nuts (28) to a
torque of 18 lb. ft. Then place a
scribe mark (B) on pump flange
using a hammer and small chisel.
g. Loosen screw (23) and insert
timing lock plate (24) under head
of screw (23). Tighten screw (23)
to a torque of 120 lb. in.
h. Disengage TDC pin (22).
i. Tighten nut (25) to a torque of 48
j. Install front cover, para. 3-19,