Chrysler RAM TRUCK 2500 1994 Service Manual page 953

F U E L D E L 1 W E R Y S Y S T E M — D I E S E L E N G I N E
INDEX
page
Diesel Fuel System Operation
20
Fuel Drain Manifold . 20
Fuel Filter 16
Fuel Filter—In Tank . 16
Fuel Filter/Water Separator
16
Fuel Heater 14
Fuel Heater Relay
15
Fuel Injection Pump
17
Fuel Injectors
18
Fuel Shutdown Solenoid 19
Fuel Shutdown Solenoid Relay
19
Fuel System Pressure Test—Diesel Engine
16
Fuel System Pressure Warning 16
GENERAL INFORMATION
This section of the group will cover diesel
fuel delivery components not controlled by the
powertrain control module (PCM), Various com­
ponents, relays and switches are operated by
the PCM. Refer to the Diesel Engine sections of
this group for components that are operated by
the PCM.
Diesel fuel delivery (except for operation of
the intake manifold air heater and manifold air
heater relays) is not directly regulated by the
PCM.
The fuel delivery system of the 5.9L turbo-diesel
engine consists of the:
• Fuel tank
• Fuel tank module
• Low and high-pressure fuel supply lines
• Low-pressure, mechanical, fuel transfer pump (fuel
lift pump)
• High-pressure fuel injection pump
• Fuel heater
• Fuel heater relay
• Fuel shutdown solenoid
• Fuel shutdown solenoid relay
• High-pressure fuel injectors
• Fuel return line
• Fuel filter/water separator
• In-tank fuel filter
• Pre-filter (in fuel heater)
• Fuel drain manifold
For information regarding fuel requirements of the
5.9L turbo diesel engine, refer to the Fuel
Requirements—Diesel Engines paragraph at the
front of this group.
page
Fuel Tank 15
Fuel Tank Module—Diesel Engine 12
Fuel Transfer Pump
15
Fuel Transfer Pump Capacity Test—Diesel Engine . 17
Fuel Tubes/Lines/Hoses and Clamps—Low-
Pressure Type
17
General Information
12
High-Pressure Fuel Lines 17
Intake Manifold Air Heater 17
Intake Manifold Air Heater Relays
17
Intake Manifold Air Temperature Sensor 17
Powertrain Control Module 20
Quick-Connect Fittings
17
FUEL TANK MODULE—DIESEL ENGINE
An electric fuel pump is not used i n 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
E L E C T R I C F U E L
PUMP
The electric fuel pump, normally mounted i n 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 T A N K 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.