CONNECTIONS FOR FUEL LINES AT THE FUEL JUNCTION BLOCK

FUEL SYSTEM

SYSTEMS OPERATION

(90N1-90N6120)

The location of the fuel junction block (4) is at

the right rear of the engine. The fuel lines from the

fuel tank and the engine connect at fuel junction

block (4).

CONNECTIONS FOR FUEL LINES AT

THE FUEL JUNCTION BLOCK

AUTOMATIC TIMING ADVANCE UNIT

1. Connection for constant bleed line to fuel tank. 2.

Connection for fuel supply line to fuel tank. 3.

1. Gear on camshaft for fuel injection pump. 2. Automatic

Connection for fuel supply line to fuel filter. 4. Fuel

timing advance unit. 3. Camshaft for the engine.

junction block. 5. Connection for bleed line for fuel

injection nozzles to fuel tank. 7. Connection for bleed

The weights (4) in the timing advance are driven

line for fuel injection nozzles on right side of engine. 8.

by two slides (6) that fit into notches made on an

Connection for bleed line for fuel injection nozzles on left

angle in the weights. The slides (6) are driven by

side of engine. 9. Tee.

two dowels which are in the drive gear for the

engine camshaft. As centrifugal force (rotation)

moves weights (4) outward against the force of

springs (5), the movement of the notches in weights

(4) will cause the slides to make a change in the

angle between the timing advance gear and the two

drive dowels in the drive gear for the engine cam-

shaft. Since the timing advance unit drives the gear

(1) on the camshaft for the fuel injection pump,

the fuel injection timing is also changed.

CONNECTIONS FOR FUEL LINES AT

THE FUEL JUNCTION BLOCK

1. Connection for constant bleed line to fuel tank. 3.

Connection for fuel supply line to fuel filter. 4. Fuel

junction block. 6. Connection for constant bleed line to

housing for fuel injection pumps. 7. Connection for bleed

line for fuel injection nozzles on right side of engine. 8.

Connection for bleed line for fuel injection nozzles on left

side of engine.

AUTOMATIC TIMING ADVANCE UNIT

The automatic timing advance unit (2) is in-

4. Weights. 5. Springs. 6. Sides.

stalled on the front of the camshaft (3) for the

engine. The automatic timing advance unit (2)

drives the gear (1) on the camshaft for the fuel

injection pump. This gear is the drive for the cam-

shaft for the fuel injection pump.