Service Manual

ISB, ISBe and QSB (Common Rail [...] Fuel Supply Lines
Section 6 - Injectors and Fuel Lines - Group 06 Page 6-59
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Preparatory Steps
CAUTION
Use caution when disconnecting or removing fuel
lines, replacing filters and priming the fuel system
that fuel is not spilled or drained into the bilge area.
Do not drop or throw filter elements into the bilge
area. The fuel and fuel filters must be discarded in
accordance with local environmental regulations.
NOTE: Clean all fittings before disassembly. Dirt or
contaminants can damage the fuel system.
Shut off the fuel supply to the engine.
Remove
NOTE: Mark the location of all p-clips and routing of fuel
supply lines to ensure that they are replaced in the correct
location during reassembly.
NOTE: Engines with a fuel cooled ECM cooling plate will
have a fuel supply line connecting the ECM cooling plate
to the inlet of the gear pump.
Remove the fuel supply line connecting the ECM cooling
plate to the inlet of the gear pump, if applicable.
Remove the fuel supply line connecting the gear pump to
the fuel filter head.
NOTE: Fuel filter may be remote mounted off of the
engine.
Remove the fuel supply line connecting the fuel filter head
to the inlet to the high pressure fuel pump.
NOTE: Mark the location of all p-clips and routing of fuel
supply lines to ensure that they are replaced in the correct
location during reassembly.
For marine applications, shut off fuel supply and return
valves.
NOTE: For marine applications, a fuel supply line
connects the fuel supply manifold to the inlet of the
electric lift pump.
Remove the fuel supply line connecting the fuel supply
manifold to the inlet of the electric lift pump, if applicable.