to the cylinder, the force made by the pressure of the
fuel in the nozzle body will become less. The force of
the spring will then be more than the force of the
pressure of the fuel in the nozzle body. Valve (8) will
move to the closed position.
Valve (8) is a close fit with the inside of nozzle tip ( 13),
this makes a positive seal for the valve.
When the fuel is sent to the cylinder, a very small
quantity of fuel will leak by the valve guide. This fuel
gives lubrication to the moving parts of the fuel injection
FUNCTION OF FUEL JUNCTION BLOCK
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
1. Connection for constant bleed line to housing for fuel
injection pumps. 2. Connection for constant bleed line
to fuel tank. 3. Connection for fuel supply line to fuel
filter. 4. Fuel junction block. 5. Connection for fuel
supply line to fuel tank.
The water separator is installed between the fuel tank
and the rest of the fuel system. For efficiency in the
action of the water separator the fuel flow must come
directly from the fuel tank and through the water
separator. This is because the action of going through a
pump or valves before the water separator lowers the
efficiency of the water separator.
The water separator can remove 95% of the water in a
fuel flow of up to 33 gph (125 liter/hr) if the
concentration of the water in the fuel is 10% or less. It
is important to check the water level in the water
separator frequently. The maximum amount of water
which the water separator can hold is 0.8 pt. (0.4 liter).
At this point the water fills the glass to 3/4 full. Do not
let the water separator have this much water before
draining the water. After the water level is at 3/4 full,
the water separator loses its efficiency and the water in
the fuel can go through the separator and cause
damage to the fuel injection pump.
Drain the water from the water separator every day or
when the water level gets to 1/2 full. This gives the
system protection from water in the fuel. If the fuel has
a high concentration of water, or if the flow rate of fuel
through the water separator is high, the water separator
fills with water faster and must be drained more often.
To drain the water separator, open drain valve (2) in the
drain line and vent valve (1) at the top of the water
separator. Let the water drain until it is all out of the
water separator. Close both valves.
1. Vent valve. 2. Drain valve.