Kubota — Bleeding Fuel System
Maintenance
From a Kubota service manual — check it applies to your exact model before use.
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Before you start
- 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.
Procedure
- Fill the tank with fuel and open the fuel cock (element type only).
- Loosen the air vent plug of the fuel filter a few turns.
- Screw back the plug when bubbles no longer come up.
- Open the air vent cock on top of the fuel injection pump.
- Pump the fuel up for 10 to 15 seconds (electrical feed pump) or crank the engine 10 to 15 seconds (mechanical feed pump).
- Close securely the air vent cock after air bleeding.
Source: Kubota service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.