TM 10-4320-315-24
3-18. MAINTENANCE OF ENGINE AND PUMP ASSEMBLY - (Cont)
NOTE
Marking the gear teeth on the injection pump drive gear and the idler gear is recommended in
case drive gear folds out of position.
(11)
Remove remaining bolt (4) and spacer (5) that secure injection pump drive gear (6) to injection pump (8).
(12)
While one person holds drive gear (6) in place, remove the remaining nut (7) and flat washer (8) from
injection pump mounting stud (9). Remove injection pump (10) from engine. Remove gasket (11).
(13)
Place rag inside front cover and against injection pump drive gear to assist in holding gear in position.
NOTE
To prevent difficulty installing fuel injection pump while injection pump drive gear is
disconnected, do not turn crankshaft.
b.
REPLACE.
(1)
Prepare replacement fuel injection pump for No. 1 piston at TDC as follows:
(a)
Remove bolts (12) with O-rings (13), plate (14) and gasket (15) from fuel injection pump (8).
(b)
Turn fuel injection pump drive shaft CW until No. 1 plunger barely starts movement going up.
(c)
Install gasket (15) and plate (14) on fuel injection pump (10) with O-rings (13) and bolts (12).
(2)
Remove rag from against injection pump drive gear (6) inside front cover.
(3)
While one person holds injection pump drive gear (6) in place, install fuel injection pump (10) on injection
pump mounting studs (9). Secure with flat washers (8) and nuts (7), but do not tighten.
(4)
Install spacers (5) and bolts (4) that secure injection pump drive gear (6) to injection pump (10).
(5)
Connect fuel injection lines to fuel injection pump.
(6)
Tighten nuts (7).
(7)
Connect fuel lines to fuel supply pump.
(8)
Set the injection pump timing as follows:
(a)
Remove No. 1 injection line (1, Figure 3-16) from injection pump (2) and install spill pipe (3) in its
place.
(b)
Disconnect main galley fuel supply line from injection pump and connect high pressure line (4) of
high pressure hand pump (5) in its place.
(c)
Turn crankshaft pulley one turn CCW to remove gear backlash.
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