LS tractor R4047H - General Maintenance (When Required); Air-Bleeding from Fuel System

5-10. General maintenance (When required)
(1) Air-bleeding from Fuel system
 The air in the fuel system may cause weak injection and the failure of engine start or stop. To prevent
such failures, bleed the air from fuel system.
Fuel injection nozzle
Fuel injection pipe
Fuel return pipe
▶ When replacing fuel filter only, air-bleeding from fuel injection pipe is not
necessary.
Notice
Fuel injection pump
Fuel filter
Fuel tank
Manual feed
pump
1. Loosen the air bleed plug of fuel filter flange.
2. Apply a rag to the air bleed plug and press the
①
①①
① Air-bleeding from Fuel filter
5
5 5
5 - 25
Air bleed plug
pump
2. Apply a rag to the air bleed plug and press the
manual feed pump several times.
If no bubbles from the plug, the process
is completed.
3. Tighten the air bleed plug.
▶ If the foreign materials are stuck to the air bleed plug, it may prevent the air-
bleeding. In this case, unscrew the air bleed plug and remove foreign materials by
blowing.
Notice