ARMY TM 92815-252-24
AIR FORCE TO 38G1-92-2
If removed, install stud (3, FIGURE 3-7).
Install correct original shim pack (6) on fuel pump (5).
(1) Do not remove or add to original shims installed between pump flange and steel plate.
(2) Use extreme care to ensure that individual shim packs are installed between each fuel pump plate an
crankcase and that they are retained with their original respective cylinder.
(3) Shims are available in three sizes and are color coded, refer to TABLE 3-3
TABLE 3-3. Color Coded Shim Packs for Fuel Pump
0.003 in.(0.075 mm)
0.005 in(0.125 mm)
0.010 in(0.250 mm)
If original shim thickness is not known or if fuel pump is being replaced, fuel pump must be timed, refer to
Gently insert fuel pump and shims into crankcase. Ensure that fuel pump rack engages with slot in governor
If fuel pump is not turned counterclockwise or moves before tightening, it Is possible that engine
will not stop when required.
Carefully turn fuel pump counterclockwise until pump rack is felt against stop.
Holding pump in this position, install clamp (2) and secure with nut (1 ) (beveled face towards clamp) finger tight
m. Tighten nut to 25 ft-lbs (33.9 Nm).
Install fuel injector pipe between pump (5) and fuel injector, refer to paragraph 3-18.
Connect fuel supply line (11) to fuel injection pump using clamp (4).
Remove rack setting gage.
Connect governor fever to rack spring (15, FIGURE 3-19).
Install end cover, refer to paragraph 3-28.3.
FUEL INJECTION PUMP TIMING.
Cleaning solvent is flammable and toxic to eyes, skin, and respiratory tract. Skin/eye protection
required. Avoid repeated/prolonged contact. Good general ventilation IA is normally adequate.
Each fuel injection pump is timed individually during assembly at factory and when an existing or new fuel injection pump
is installed, it is only necessary to reinstall existing shim pack or a new pack of same thickness as original. This
procedure ' is necessary only if original shims have been lost or mixed with those of another pump. Use care to avoid
dirt entering into engine during fuel injection pump timing procedure. If practical, start with a thorough cleaning. Use dry
cleaning solvent (P-D- 680) to remove all external dirt. For each fuel injection pump to be timed, repeat following
Remove cylinder head cover and fuel injector, refer to paragraphs 3-25.1. and 3-17.1.