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TM5-4210-229-14&P
4-76. FUEL INJECTION PUMP REPLACEMENT (Continued).
REMOVAL
a.
Disconnect accelerator cable or linkage from outer
injection pump control lever (1).
b.
Remove injection pump timing pointer plug (2) and
gasket from left side of pump mounting adapter.
c.
Rotate engine in normal operating direction until
engine front cover timing pointer is approximately
90 degrees from top dead center dot on crankshaft
pulley. (The injection pump is driven at one-half
engine speed. Therefore, each time the injection
pump hub mark (3) is aligned with injection pump
timing pointer (4), engine should be on number one
cylinder compression stroke.
d.
Turn engine slowly in normal direction of rotation
until timing mark (3) on hub is aligned with injec-
tion pump timing pointer (4) (observe through
mounting adapter timing plug hole (2)). If engine is
turned past timing mark, rotate engine counter-
clockwise at least 90 degrees to remove gear train
backlash. Rotate engine until timing mark (3) and
pump timing pointer (4) are aligned.
e.
Observe engine front cover timing pointer and
crankshaft pulley degree alignment. To ensure an
accurate reading, view pointer straight on the en-
gine should now be positioned at specified static
pump to engine timing. If timing is not within speci-
fications, rotate engine to correct crankshaft posi-
tion (specified degrees before top dead center)
before removing injection pump. If necessary to
rotate engine in opposite direction of normal rota-
tion to achieve specified timing, rotate engine to 90
degrees before top dead center and then rotate
engine to specified timing. This procedure takes up
gear backlash.
f.
Remove high pressure injection lines as an as-
sembly of six lines from injection nozzles and
pump. Cap all openings to keep dirt out of fuel
system.
g.
Remove or disconnect all other necessary lines,
hoses, and wires from pump.
h.
Cap all openings to keep dirt out of fuel system.
i.
Remove injection pump drive gear access cover
capscrews and washers (5).
4-88
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