Removing and Installing/Replacing High-Pressure Pump for Cylinders 7 to 12 (N73)

13 51 061 - Removing and installing/replacing high-pressure pump for cylinders 7 to 12 (N73)





Recycling:
Fuel escapes when fuel lines are detached.
Catch and dispose of escaping fuel.
Observe country-specific waste-disposal regulations.





Check pressure damper diaphragm of high-pressure pump for leaks.
Connect an 8 mm inside dia. fuel hose (2) to special tool (1) 13 0 133 collection container.





Note:
Picture shows the right side, the procedure for the left side is identical.

Connect special tool 13 0 133 to ventilation connection (1) of high-pressure pump.
Do not press brake pedal to floor.
Switch on ignition.
Electronic fuel pump starts up for approx. 2-5 secs.
If the diaphragm of the high-pressure pump is leaking, fuel emerges at the ventilation connection.
Follow diagnosis instructions if the diaphragm is leaking.





Necessary preliminary tasks:
- Remove intake air manifold Service and Repair.





Release lines (2).
Release lines (3).
Tightening torque: 13 53 1AZ 13 53 Fuel Injection Nozzles and Pipes
Release lines (4).
Tightening torque:13 53 2AZ 13 53 Fuel Injection Nozzles and Pipes
Release lines (5).
Tightening torque: 13 53 3AZ 13 53 Fuel Injection Nozzles and Pipes
Disconnect connector (1).
Unscrew screws (6).
Tightening torque: 13 51 1AZ 13 51 Injection Pump, Control, Mixture Regulator.





Replace O-ring (1).





Remove bucket tappet (1) in direction of arrow.

Installation:
If necessary, replace bucket tappet (1).





Installation:
Secure lines (2) from bottom upwards with a suitable line wrench (1).





Assemble engine.
Check function of DME.