Fuel Injection Pump

Body

Seal

Nut

Seal

Nozzle

Figure 5-17. Fuel injector, disassembly and reassembly.

(4) Connect the fuel line (fig. 5-16).

(3) Each pump measures the amount of fuel

to be injected into the cylinder and delivers it to the

(5) Bleed the fuel system as instructed in TM

fuel injection nozzle in the precombustion chamber.

5-2410-233-20.

(4) The amount of fuel pumped per stroke is

5-11. Fuel Injection Pump

varied by the turning of the plunger (9, fig. 5-19) in

a. General.

the pump barrel (6). The plunger is turned by

(1) The fuel injection pump (fig. 5-19) is

governor action through the circular rack (12)

composed of six individual pumps installed in the

which turns the gear segment on the bottom of the

fuel injection pump housing.

pump plunger (9).

(2) The pump is camshaft operated and

b. Removal. Refer to figure 5-18.

driven by an adapter from the accessory drive shaft.

(1) Disconnect the linkage at the governor

Fuel enters the fuel injection pump housing

control lever.

through an inlet port from the fuel filter. The pump

(2) Disconnect the fuel injection lines at the

plungers and lifters are actuated by lobes on the

housing. Cap or plug openings.

pump camshaft. The lifters are held against the

cam lobes by springs.