Diesel Fuel System - International Harvester Company TD-14A Operator's Manual

MAINTENANCE
Cleaning the Gasoline Strainer and
Sediment Bowl
~---Gasket
~
O'
---Screen
Illust.38
Gasol ine strainer and glass
bowl removed for cleaning.
The gasoline strainer, located under the
gasoline tank, should be cleaned after every
240 hours of operation when the tractor is in
use. To clean the strainer, close the gasoline
shut-off valve and take the strainer apart by
loosening the lower jam nut and disassembling
the strainer. Clean the screen if necessary.
When reassembling the strainer, be sure
that the cork gasket between the bowl and the
main body is in good condition and that it does
not leak.
DIESEL FUEL SYSTEM
The diesel fuel syste •
..:.1
consists of a fuel
tank, an IH single-plunge' injection pump
with primary pump and [:overnor unit, two
fuel filters, a water trap, fuel lines, injection
nozzles and the necessary piping and connec-
tions. Diesel fuel passes through the system
as follows:
The fuel is drawn from the tank, through
the water trap and auxiliary fuel filter by
the primary pump which is mounted on the
injection pump. From there it is drawn
through the final fuel filter and then to the
injection pump where it is metered in exact
quantities as required by governor setting and
load demands.
The fuel is then delivered under high
pressure from the injection pump to the injec-
tion nozzles and is distributed to the correct
cylinder at the correct time in accordance
IIlust. 39
Water trap, auxiliary filter,
final fuel filter
and injection nozzles.
with the firing order of the engine. All fuel
delivered to the injection pump in excess of
that used by the engine is returned through a
separate pipe to the fuel tank. Thus, fuel is
being recirculated continually through the fuel
system.
Venting Air from Diesel Fuel System
The engine will fail to run on the diesel
cycle if there- is any air in the fuel system.
To remove air, it is necessary to vent the fuel
system by opening the vent valves successive-
lyon the water trap, fuel filter and injection
nozzles.
With the engine stopped and the fuel tank
shut-off valve open, open the vent screw
"A"
on the water trap.
See Illust.
39. Close when
fuel starts to flow; then vent the air bleeder
"B," on the auxiliary fuel filter, and close when
fuel starts to flow.
Start and operate the engine on the gaso-
line cycle, then advance the engine speed con-
trol lever slightly. Open 'air bleeder "C," on
the final fuel filter, and close when fuel starts
to flow. Open each nozzle vent screw "D"
individually and close when fuel flows.
Pull the engine speed control lever to the
shut-off position. The fuel system should now
be completely vented of air.
48