Dodge RAM TRUCK 1500 1995 Service Manual page 1095

BR FUEL DELIVERY SYSTEM—DIESEL ENGINE 14 -13
FUEL TANK MODULE—DIESEL ENGINE
An electric fuel pump is not used in the fuel tank
module for diesel powered engines. Fuel is supplied
by the fuel transfer pump and the fuel injection
pump.
The fuel tank module is installed in the top of the
fuel tank (Fig. 2). The fuel tank module (Figs. 2 or 3)
contains the following components:
• Fuel reservoir
• A separate in-tank fuel filter
• Pressure relief/rollover valve
• Fuel gauge sending unit
• Fuel supply line connection
• Fuel return line connection
• Auxiliary fuel supply fitting
PRESSURE RELIEF/
ROLLOVER VALVE
PLASTIC
LOCKNUT
FRONT
OF TANK
AUX. FUEL
SUPPLY FITTING
FUEL
SUPPLY
LINE
FUEL
RETURN
LINE
FUEL GAUGE
SENDING
UNIT
ELECTRICAL
CONNECTOR
J9414-70
Fig. 2 Top View of Fuel Tank Module—Diesel
FLOAT
FUEL GAUGE LOCKING
SENDING UNIT TABS
ELECTRIC
FUEL PUMP
MOUNTING
SCREWS
IN-TANK
FUEL FILTER
J 9 4 1 4 - 3 3
Fig. 3 Fuel Gauge Sending Unit—Typical
ILECTmC FUEL PUMP
The electric fuel pump, normally mounted in the
fuel pump module on gas powered engines, is not
used
with diesel powered engines.
The low-pressure, fuel transfer pump (fuel lift
pump) and high- pressure fuel injection pump are
mechanically operated. Refer to either: Fuel Transfer
Pump or Fuel Injection Pump for information.
FUEL TANK MODULE REMOVAL
CAUTION: Whenever the fuel tank module is ser­
viced, the plastic locknut and rubber gasket must
be replaced.
(1) Drain the fuel tank. Refer to Draining Fuel
Tank in the Fuel Tank section of this group.
(2) Remove fuel tank. Refer to the Fuel Tank sec­
tion of this group.
(3) Note the direction of the: fuel line connectors,
the pressure relief/rollover valve and the fuel gauge
electrical connector. These should all be pointed to
the drivers side of the vehicle.
(4) The plastic locknut on the fuel tank module is
threaded onto the fuel tank. Remove the locknut
(Fig. 2). The tank module will spring up when the
locknut is removed.
(5) Remove module from fuel tank.
DISASSEMBLY—FUEL GAUGE SEIDING UNIT
(1) Remove sending unit mounting screws (Fig. 3).
(2) Mark the sending unit electrical wires before
removal for correct installation. Carefully disconnect
electrical wires from sending unit. Remove sending
unit.
(3) Reverse order of removal for fuel gauge unit in­
stallation.
IN-TANK FUEL FILTER
The in-tank filter is attached to the bottom of the
fuel tank module (Fig. 3).
(1) Pry the mounting tabs back and remove the in-
tank fuel filter.
(2) Install new fuel filter into retaining tabs.
FUEL TANK MODULE INSTALLATION
CAUTION: Whenever the fuel tank module is ser­
viced, the locknut and rubber gasket must be re­
placed.
(1) Using a new gasket, position the fuel tank
module into the opening in fuel tank. The fuel line
connectors, the pressure relief/rollover valve and the
fuel gauge electrical connector should all be pointed
to the drivers side of the vehicle before tightening
locknut.
(2) Position new locknut over top of fuel tank mod­
ule.
(3) Tighten locknut.
(4) Install fuel tank. Refer to Fuel Tank Installa­
tion in this section.
AUXILIARY FUEL SUPPLY FITTING
An auxiliary (capped) fuel supply fitting is located