Fuel System (Distributor Type Fuel Injection Pump) - Bleed Air - Mitsubishi S4S-DT Operation & Maintenance Manual

Fuel system (distributor type fuel injection pump) - Bleed air

When handling fuel, make sure there are no open flames or other fire hazards near the engine.
When fuel overflows from the air vent plug, wipe thoroughly with a cloth.Spilled fuel can ignite and cause a fire.
After replacing fuel filter or draining water from fuel fil-
ter, or when running out of fuel, bleed the fuel system
as follows:
1. Loosen the air vent plug on the fuel filter about 1.5
turns.
2. Apply a cloth to the air vent plug.
3. Repeat pumping until the fuel flow from air vent
plug becomes free of bubbles.
4. Repeat pumping until the fuel flow from air vent
plug becomes free of bubbles.
Chapter 8 PERIODIC INSPECTION AND MAINTENANCE PROCEDURES
Priming pump
Fig. 8-8 Fuel filter - Bleed air (1)
Fig. 8-9 Fuel filter - Bleed air (2)
Air vent plug
8-5