Fuel Injector Control Lever and Tube Assembly

TM 10-3930-242-34

FUEL SYSTEM

Section II.

3-12. General

e. Reassembly. Refer to figure 319 and reas-

s e m b l e fuel injector control lever and tube as-

The engine fuel system consists of the fuel

sembly.

injectors, fuel pump, and fuel tank. A restricted

f. Installation and adjustment.

f i t t i n g is located in the cylinder head to main-

(1) Refer to figure 3-18 and install the fuel

tain pressure in the fuel system. There are

i n j e c t o r control lever and tube assembly.

three rocker arms and three push rods for each

(2)

Adjust

the

control

levers

(TM

c y l i n d e r . One rocker arm operates the fuel in-

10-3930-242-12).

j e c t o r plunger; the other two operate the ex-

(3) Install the rocker arm cover and engine

h a u s t valves.

hood (TM 10-3930-242-12).

3-13. Fuel Injector Control Lever and Tube

3-14. Fuel Injectors (Needle Valve)

Assembly

a. General.

a. General. Each fuel injector is actuated by a

(1) The unit fuel injector performs four

lever on the injector control tube, which in turn,

functions:

is connected to the governor by means of a fuel

( a ) C r e a t e s t h e h i g h f u e l p r e s s u r e re-

rod, These levers can be adjusted independently

q u i r e d for efficient injection,

o n the control tube, thus permitting a uniform

(b) Meters and injects the fuel in t h e

setting of all injector racks.

e x a c t amount required to handle the load,

b. Removal,

(c) Atomizes the fuel for mixing with t h e

(1) Remove the engine hood and rocker arm

a i r in the combustion chamber.

cover (TM 10-3930-242-12).

(d) Permits continuous fuel flow,

(2) Refer to figure 3-18 and remove the fuel

( 2 ) Each fuel injector has a circular disc

i n j e c t o r control lever and tube assembly,

p r e s s e d into a recess at front side of injector

c. Disassembly, Refer to figure 3-19 and dis-

body for identification purposes. The identifica-

assemble the fuel injector control lever and tube

tion tag indicates the nominal output of injector

assembly,

i n cubic millimeters. A horizontal bar on the

d . Cleaning and Inspection.

i n j e c t o r identification tag between the "GM"

(1) Clean fuel injector control levers and

a n d the injector size identifies needle valve.

tube, using a cleaning solvent such as P-D-680,

or equal,

CAUTION

(2) Inspect the levers for cracks.

Do not intermix needle valve injectors

(3) Inspect the tube assembly for dents and

with other types of injectors in an engine.

breaks.

( 4 ) Inspect all hardware for damage. Re-

(3) Fuel in excess of that required for en-

p l a c e a defective part.

g i n e operation is circulated through the injec-

Figure 3-18. Fuel injector control lever and tube assembly,

removal and installation.

3-26