TM 5-3810-307-24-1-2
Fuel System Fuel Pump. (Refer to Figure K-24.)
The fuel pump is normally removed for replacement.
Removal.
a.
Remove the fuel system guard from the lower cylinder (Page K-57).
b.
Close the fuel pump feed and return shutoff valves (handles perpendicular to the lines).
c.
Using a suitable container to catch any fuel, disconnect the two braided fuel injector lines
(1, Figure K-24) from the fuel injectors and then from the fuel pump (2).
d.
Loosen the hose clamp (3) securing the rubber fuel line (4) to the fuel inlet fitting on the
fuel pump (2) and disconnect the line from the fitting.
NOTE
The fuel inlet fitting on the fuel pump is a male, straight barbed fitting and
the fuel outlet fitting is an adapter.
e.
Remove the six fuel pump mounting bolts (6) and lockwashers (7) securing the fuel
pump (2) to the lower cylinder. Retain the fuel pump adjusting screw keeper (8).
f.
Disconnect the braided fuel line (5) from the fuel outlet fitting on the fuel pump (2).
g.
Remove the fuel pump (2) from the lower cylinder and discard the fuel pump copper seal
(9).
Installation.
a.
Align the fuel pump (2, Figure K-24) and new fuel pump copper seal (9) with the
mounting holes on the lower cylinder.
b.
Connect the braided fuel line (5) to the fuel outlet fitting on the fuel pump (2).
Place Loctite 272 (red) on the six fuel pump mounting bolts (6). Align the fuel pump
c.
adjusting screw keeper (8) with the mounting holes closest to the fuel pump adjusting
screw (10) and secure the fuel pump (2) to the lower cylinder with the six fuel pump
mounting bolts (6) and lockwashers (7). Tighten the bolts and torque to 150 ftlb (203
Nm).
d.
Connect the rubber fuel line (4) and hose clamp (3) to the fuel inlet fitting on the fuel
pump (2). Tighten the hose clamp (3).
e.
Place Teflon tape on the threads of the two braided fuel injector lines (1) and connect
the fuel injector lines (1) to the fuel pump (2). Connect the other end of each fuel injector
line to the respective fuel injector.
f.
Install the fuel system guard on the lower cylinder (Page K-57).
NOTE
Prior to starting the impact hammer, ensure fuel system has been bled by
bleeding air from the fuel inlet line at each of the two fuel injectors in
accordance with the Preventive Maintenance Checks and Services
(PMCS) Table in Appendix H of the Operator's Manual, TM 5-3810-307-10.
K-58 Change-1
