Air Bleeding The Fuel System - Kubota D1703-M-E Operator's Manual

12 PERIODIC SERVICE
BAir bleeding the fuel system
To avoid personal injury;
A Do not bleed a hot engine as this
could cause fuel to spill onto a hot
exhaust manifold creating a danger
of fire.
Air bleeding of the fuel system is required if;
A after the fuel filter and pipes have been detached and
refitted;
A after the fuel tank has become empty; or
A before the engine is to be used after a long storage.
[PROCEDURE ] (gravity feed fuel tanks only)
1. Fill the fuel tank to the fullest extent. Open the fuel
filter lever.
2. Open the air vent cock on top of the fuel injection
pump.
3. Turn the engine, continue it for about 10 seconds,
then stop it, or move the fuel feed pump lever by hand
(optional).
4. Close the air vent cock on top of the fuel injection
pump.
A Always keep the air vent cock on the fuel injection
pump closed except when air is vented, or it may
cause the engine to stop.
[GRAVITY FEED SYSTEM]
(1) Air vent cock
(2) Fuel feed pump
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[PROCEDURE ] (fuel tanks lower than injection
pump)
1. For fuel tanks that are lower than the injection pump.
The fuel system must be pressurized by the fuel
system electric fuel pump.
2. If an electric fuel pump is not used, you must manually
actuate the pump by lever to bleed.
3. The primary fuel filter must be on the pressure side of
the pump if the fuel tank is lower than the injection
pump.
4. To bleed, follow (2) through (4) above.
A Tighten air vent plug of the fuel injection pump except
when bleeding, or it may stop the engine suddenly.
[TANK BELOW INJECTION PUMP SYSTEM]
(1) Fuel tank below injection pump
(2) Pre-filter
(3) Electric or Mechanical pump
(4) Main Filter
(5) Injection pump