How to Bleed Air from the Fuel System for FENDT 900 Vario Tractor

This instruction show you guide on how to bleed air from the fuel system for FENDT 900 Vario Tractor.

 

DANGER:

High-pressure lines must not be opened, as the common rail system is permanently pressurised and serious injuries may result.

 

Preparations:

AGCO EDT 2026

AGCO 2×4 CANUSB 930203400

Fendt Fendias 2024 v2

2026 Deutez Serdia 4.0 v20

 

 

Version I

Prime with the hand pump (A).

If necessary, bleed the low pressure circuit: vent plug (A)Unscrew

Prime with the hand pump until fuel is discharged without any air bubbles.

Close vent plug (A).

A

Vent plug

B Water drain plug

C Filter cap

 

Pump the hand pump (A) until strong resistance is felt,then continue pumping for a few more strokes.

Start the engine, allow to warm up for max. 30 seconds.

NOTE: Air in the high-pressure system may result in unacceptable pressure fluctuations in the common rail system.

Therefore, the tractor should be operated under low load for about 5 minutes.

 

Version II

Open bleed screw (A) for the fuel pre-filter.

Keep pumping with manual delivery pump (B) until strong resistance is felt; pump on for a few strokes after this.

Close the bleed screw for the fuel pre-filter.

Start engine.

NOTE: Air in the high-pressure system may result in unacceptable pressure fluctuations in the common rail system.

Therefore, the tractor should be operated under low load for about 5 minutes.