High Pressure Pump Overview

High Pressure Pump Overview






1 Cam Follower

• Replace if damaged.

2 O-ring

• Always replace.

• Before installing, lubricate with clean engine oil.

3 High Pressure Pump with Fuel Pressure Regulator Valve (N276)

• Removing and installing, refer to => [ High Pressure Pump ] High Pressure Pump.

4 Bolt

• 10 Nm

5 Union Nut

• 27 Nm

• Counter hold the threaded connection when loosening.

• Check the tightening specification for the threaded connection inside the high pressure pump before installing.

• Install the fuel pipe free of stress.

6 High Pressure Pipe

• Always follow the safety precautions when reducing the high side fuel pressure. Refer to => [ High Side Fuel Pressure, Releasing ] Service and Repair.

7 Threaded Connection

• 30 Nm

• Replace only after it has been loosened.

• Always leave the old seal in the high pressure pump when replacing the threaded connection it is pinched during initial assembly by the supplier and cannot be removed. The new threaded connection has a biting edge for sealing.

8 Low Pressure Fuel Hose

• Secured with a spring type clamp.

9 Banjo Bolt with Conical Seal Seat

• Not installed in the US/Canadian market.

• 15 Nm

• Always replace.

• Install the fuel pipe free of stress.

• Counter hold the threaded connection when loosening.

10 Fuel Pipe

• Not installed in the US/Canadian market.

• Low pressure.

11 Threaded Connection

• Not installed in the US/Canadian market.

• 30 Nm

• replace only after it has been loosened.

• Always leave the old seal in the high pressure pump when replacing the threaded connection it is pinched during initial assembly by the supplier and cannot be removed. The new threaded connection has a biting edge for sealing.

12 High Pressure Pipe Threaded Connection

• 40 Nm

• Do not loosen the threaded connection, just retighten it.

13 Low Fuel Pressure Sensor (G410)

• 15 Nm

14 Seal

• Always replace.