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Do not tee into fuel injected fuel systems. Use a two dip
tube arrangement for fuel supply. Consult an authorized
service dealer for further fuel system installation
information.
Care must be taken when routing the fuel line from the
fuel tank to the generator set. Keep fuel lines as short as
possible but maintain adequate clearance from the
exhaust system. Fuel lines must be run along the frame
or undercarriage— never run fuel lines inside the coach.
Locate fuel lines below the generator set compartment
with entry point near fuel pump (max. lift of the fuel pump
is 1 meter or 39 inches). The fuel line must be of
adequate size to handle the flow of fuel and withstand
road shock and year-round climate conditions. If steel
tubing is used, use a 5/16 in. (8 mm) I.D. (minimum) with
an 8 in. (230 mm) (minimum) flexible section to allow
free movement of the generator set.
Locate the fuel return line as far as practical from the fuel
pickup. This will allow returned fuel to be cooled by the
tank fuel before delivery back to the fuel injectors.
Incoming fuel is used to cool the injectors and maximum
1
1. Fuel Inlet Connection
6-18 Installation
NOTE
Figure 6-19. Fuel Inlet and Return Connection Points
engine efficiency will be achieved by supplying cool fuel
to the engine. The fuel tank capacity and the amount of
fuel will affect cooling capability.
Fuel Line Sizes:
Fuel Inlet
Fuel Return
Fuel Lines
If metal lines are used from the fuel tank, use a flexible
hose section to connect the metal line to the preliminary
fuel filter (supplied loose) and flexible hose section to the
engine fuel pump (fuel-inlet connection). Use a flexible
hose section to connect the metal line from the fuel tank
to the engine fuel-return connection point. The flexible
sections are necessary to allow vibrational motion of the
generator set during operation. See Figure 6-19 for fuel
inlet- and return-line connections.
Diesel-fueled engines require SAE 30R6, SAE30R7, or
SAE 30R8 type hose.
2
2. Fuel Return Connection
5/16 in. (8 mm)
3/16 in. (5 mm)
NOTE
TP-5594 5/95
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