FLOW OF FUEL USING THE PRIMING PUMP - TM-5-3895-349-14-P0388

FUEL SYSTEM

SYSTEMS OPERATION

(75V1-UP, 90N6121-UP)

GOVERNOR PARTS

FUEL SYSTEM COMPONENTS

23. Piston for dashpot governor. 24. Spring for dashpot

governor. 26. Spring seat. 27. Over fueling spring. 28.

Thrust collar.

14. Housing for fuel injection pumps. 19. Sleeve control shaft.

31. Sleeve levers. 32. Sleeves.

When governor springs (25) are put in compres-

FLOW OF FUEL USING THE PRIMING PUMP

sion, the spring seat at the front of the governor

springs will make contact with load stop lever (29).

When the handle of priming pump (2) is pulled

Rotation of the load stop lever moves load stop pin

out, negative air pressure in priming pump (2)

(17) up until the load stop pin comes in contact

opens check valve (A) and pulls fuel from fuel tank

with the stop bar or stop screw. This stops the

(7). Pushing the handle in closes check valve (A)

movement of thrust collar (28), the connecting

and opens check valve (B). This pushes air and/or

levers, and sleeve control shafts (19). At this

fuel into housing (14) through the fuel passages

position, the maximum amount of fuel per stroke

and check valve (C). More operation of priming

is being injected by each injection pump.

pump (2) will pull fuel from fuel tank (7) until the

fuel lines, fuel filter (9) and housing (14) are full of

The carrier for governor weights (30) is held on

fuel. Do this until the flow of fuel from manual

the rear of camshaft (13) by bolts. When engine

bleed valve (5) is free of air bubbles. Relief valve

rpm goes up, injection pump camshaft (13) turns

(10) will open and let the fuel go to the inlet for

faster. Any change of camshaft rpm will change the

fuel priming pump (21 if the pressure gets higher

rpm and position of governor weights (30). Any

than 20 psi (1.4 kg/cm ) when using priming pump (2).

change of governor weight position will cause

thrust collar (28) to move. As governor weights

CONSTANT BLEED VALVE

(30) turn faster, thrust collar (28) is pushed toward

governor springs (25). When the force of governor

springs (25) is balanced by the centrifugal force of

the governor weights, sleeves (32) of the injection

pumps are held at a specific position to send a

specific amount of fuel to the engine cylinders.

When the governor control lever is turned to-

ward the FUEL-OFF position with the engine run-

ning, there is a reduction of force on governor

springs (25). The movement of the linkage in the

governor will cause fuel control shafts (19) to

move sleeves (32) down, and less fuel will be in-

jected in the engine cylinders.

To stop the engine, turn the ignition switch to

the "OFF" position. This will cause the shut-off

solenoid to move linkage in the fuel pump housing.

Movement of the linkage will cause sleeve levers

CONSTANT BLEND VALVE

(31) to move sleeves (32) down, and no fuel is sent

to the engine cylinders. With no fuel going to the

4. Constant bleed valve. D. Check valve.

engine cylinders, the engine will stop.