DD15 Engine

Section 35.8 Low Pressure Lines

Section 35.8
Low Pressure Lines

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 1. Emergency Pump Lubrication Line‪

 4. Low Pressure Pump Inlet‪

 2. High Pressure Pump Inlet‪

 5. Low Pressure Pump Outlet‪

 3. High Pressure Pump Outlet‪

 6. Filter Module to MCM Cooler Lines‪

There are six low pressure lines. Four low pressure lines run from the two pumps to the fuel filter module, one from the fuel filter module to the MCM and the emergency pump lubrication line.‪

Section 35.8.1
Removal of Low Pressure Fuel Pump Inlet and Outlet

Remove as follows:‪

  1. Drain the fuel filter module by removing one of the fuel filters or by using the water in fuel drain.
  2. Remove the low pressure fuel pump inlet or outlet lines from the filter module and from the low pressure fuel pump.
  3. Clean and inspect the fittings on the filter module and on the low pressure fuel pump for damage.

Section 35.8.2
Installation of Low Pressure Fuel Pump Inlet and Outlet

Install as follows:‪

  1. Install the low pressure fuel pump inlet or outlet lines to the filter module and to the low pressure fuel pump.

    Note: When tightening the fuel line ensure the corresponding fitting is held. This will ensure that the line will not twist or deform.

  2. Torque the two attaching nuts to 45 Nm (33 ft/lb).
  3. Prime system using fuel priming valve or hand primer. Refer to "6.5 Fuel System Priming" , “Fuel System Priming.”

Section 35.8.3
Removal of High Pressure Fuel Pump Inlet and Outlet

Remove as follows:‪

  1. Drain the fuel filter module by removing one of the fuel filters or by using the water-in-fuel drain.
  2. Remove the high pressure fuel pump inlet or outlet lines from the filter module and from the high pressure fuel pump.
  3. Clean and inspect the fittings on the filter module and on the high pressure fuel pump for damage.

Section 35.8.4
Installation of High Pressure Fuel Pump Inlet and Outlet

Install as follows:‪

  1. Install the low pressure fuel pump inlet or outlet lines to the filter module and to the high pressure fuel pump.

    Note: When tightening the fuel line ensure the corresponding fitting is held. This will ensure that the line will not twist or deform.

  2. Torque the two attaching nuts to 30 Nm (22 ft/lb).
  3. Prime system using fuel priming valve or hand primer. Refer to "6.5 Fuel System Priming" , “Fuel System Priming.”

Section 35.8.5
Removal of Emergency Lubrication Line.

Remove as follows:‪

  1. Remove the emergency lubrication line from the filter module and from the high pressure fuel pump
  2. Clean and inspect the fittings on the filter module and on the high pressure fuel pump for damage.

Section 35.8.6
Installation of Emergency Lubrication Line

Install as follows:‪

  1. Install the emergency lubrication line to the filter module and to the high pressure fuel pump.

    Note: When tightening the fuel line ensure the corresponding fitting is held. This will ensure that the line will not twist or deform.

  2. Torque the two attaching nuts to 23 Nm (17 ft/lb).
  3. Prime system using fuel priming valve or hand primer. Refer to "6.5 Fuel System Priming" , “Fuel System Priming.”

Section 35.8.7
Removal of Filter Module to MCM Cooler Lines

Remove as follows:‪

  1. Drain the fuel filter module by removing one of the fuel filters or by using the water-in-fuel drain.
  2. Remove the fuel line attaching clip from the MCM.
  3. Loosen the fittings from the filter module and the banjo bolts at the MCM cooler.
  4. Clean and inspect the fittings on the filter module and on the high pressure fuel pump for damage.

Section 35.8.8
Installation of Filter Module to MCM Cooler Lines

Install as follows:‪

  1. Install the lines from the filter module to the MCM cooler.

    Note: When tightening the fuel line ensure the corresponding fitting is held. This will ensure that the line will not twist or deform.

  2. Torque the two attaching nuts at the filter module to 45 Nm (33 ft/lb).
  3. Torque the two attaching banjo bolts at the MCM to 30 Nm (22 ft/lb).
  4. Prime system using fuel priming valve or hand primer. Refer to "6.5 Fuel System Priming" , “Fuel System Priming.”


DD15 Fuel System Technician's Guide - DDC-SVC-MAN-0037
Generated on 10-13-2008

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