Thermo King 002008, Manual

Page: 60 / 155

Engine Maintenance
60
Bleeding the Fuel System
If the engine runs out of fuel, repairs are made to
the fuel system, or if air gets into the system for
any other reason, the air must be bled out of the
fuel system.
NOTE: MAKE SURE the fuel tank vent is kept
open. If the vent becomes clogged, a partial
vacuum develops in the tank, and this increases
the tendency for air to enter the system.
To bleed air from the fuel system:
1. Loosen the bleed screw in the inlet fitting on
the injection pump.
2. Unscrew the priming pump handle and
manually prime the fuel system until air
bubbles are no longer visible in the fuel
coming out of the bleed screw.
3. Tighten the bleed screw and screw the priming
pump handle back in.
4. Loosen the injection lines at the injection
nozzles.
5. Crank the engine until fuel appears at the
nozzles.
6. Tighten the injection lines.
7. Start the engine and observe the engine run for
a few minutes. If the engine fails to start, or
starts but stops in a few minutes, repeat the
procedure.
Draining Water from Fuel Tank
Water run through the system may damage the
injection pump or nozzles. Damage to the fuel
system will subsequently cause more expensive
damage to the engine. A large accumulation of
water in the bottom of the fuel tank will stop a
diesel engine. Water should be drained off during
scheduled maintenance inspections to prevent
breakdowns. Drain the water off after the fuel
tank and unit have remained idle for an hour.
1. Place a container under the fuel tank to catch
the draining water and fuel.
2. Remove the drain plug from the bottom of the
fuel tank.
NOTE: Some fuel tanks have a check valve in
the drain plug fitting. Push the check valve open
with a small screw driver to drain the tank.
3. Let the water and fuel drain into the container
until no water is visible in the fuel draining
from the tank. If the water and fuel do not
drain freely, the vent may be plugged. If so,
clean or replace the vent.
4. Install the drain plug.
Fuel Filter/Water Separator
The fuel filter/water separator removes water
from the fuel and returns it to the fuel tank.
Fuel Filter/Water Separator
Replacement
Replace the fuel filter/water separator at intervals
according to the Maintenance Inspection
Schedule.
1. Stand Pipes 4. Drain Plug
2. Anti-Siphon Screen (Optional) 5. Vent
3. Fuel Gauge
Figure 26: Fuel Tank
1. Bleed Screw
Figure 27: Injection Pump
5
4
aea751
1
3
2
AEA759
1