MTU 12V 1600 Engine Fuel System Pump Venting Guide

by Dave Jack Auto Car Repair Knowledge

This instruction show you guide on how to vent fuel system pump for MTU 1600 Engine.

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Procedures:
Variant A – Venting fuel system with external fuel pump
Note: Do not open the high pressure system when
putting into operation and servicing.
1. Open the unpressurized return to the tank (1) and connect to the tank or a suitably large vessel.
2. Open vent valve (3) on fuel filter.
Note: The customer must establish the connection in the fuel supply line (2) as close to the connection on the engine as possible.
3. Vent fuel filter by activating electric fuel pump.
4. Close vent valve (3) on fuel filter.
5. Activate the electric fuel pump until flow can be heard at the HP pump. Fuel emerges from the return to the tank (1) now.
6. Connect return to tank (1).
7. Start engine.

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Variant B – Venting fuel system with hand pump at fuel prefilter
1. Unlock fuel priming pump, screw out handle (1).
Note: Catch emerging fuel with a suitable rag.
2. Undo threaded vent plug (2) and unscrew by approx. 3 to 4 revolutions.
3. Operate the pump with the handle (1) until
bubble-free fuel emerges from the threaded vent plug (2).
4. Close threaded vent plug (2) and tighten by hand.
Note: Catch emerging fuel with a suitable rag.
5. Undo threaded vent plug (3) and unscrew by approx. 3 to 4 revolutions.
6. Operate the pump with the handle (1) until bubble-free fuel emerges from the threaded vent plug (3).
7. Close threaded vent plug (3) and tighten by hand.

Venting fuel filter with cooler
1. Unlock fuel priming pump at fuel prefilter, screw out handle, see above (→ Step 1).
2. Provide a suitable container in which to collect the fuel.
Note: Do not fully unscrew threaded vent plug.
3. Open threaded vent plug (arrowed).
4. Operate the pump with the handle until bubble-free fuel emerges from the threaded vent plug (arrowed)
5. Screw in threaded vent plug (arrowed) and tighten to specified torque using a torque wrench.