2006 DODGE RAM SRT-10 Service Repair Manual

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Page 2369 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual TA N K - F U E L
DESCRIPTION
The fuel tank is similar to the tank used with gasoline powered models. The tank is equipped with a separate fuel
return line and a different fuel tank module for diesel p

Page 2370 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual INSTALLATION
1. If fuel tank is to be replaced, install fuel tank mod-
ule into tank. (Refer to 14 - FUEL SYSTEM/FUEL
DELIVERY/FUEL TANK MODULE - REMOVAL).
2. Position fuel tank (1) to hydraulic jack.

Page 2371 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual MODULE - FUEL TANK
DESCRIPTION
.
The fuel tank module is installed in the top of the fuel tank. The fuel tank module contains the following compo-
nents:
An electric fuel transfer (lift) pump
Fuel res

Page 2372 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual 1. Using a new seal (gasket), position fuel pump mod-
uleintoopeninginfueltank.
2. Position lockring (5) over top of fuel pump module.
3. Rotate module until embossed alignment arrow
points to center

Page 2373 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual PUMP - FUEL TRANSFER
DESCRIPTION
The fuel transfer pump (fuel lift pump) is part of the fuel pump module. The fuel pump module is located in the fuel
tank. The 12–volt electric pump is operated and

PUMP - FUEL TRANSFER
DESCRIPTION
The fuel transfer pump (fuel lift pump) is part of the fuel pump module. The fuel pump module is located in the fuel
tank. The 12–volt electric pump is operated and controlled by the Engine Control Module (ECM). The ECM controls
a relay in the Intelligent Power Module(IPM) for transfer pump operation.
OPERATION
The purpose of the fuel transfer pump is to supply (transfer) a low-pressure fuel source:fromthe fuel tank,through
the fuel filter/water separator andtothe fuel injection pump. Here, the low-pressure is raised to a high-pressure by
the fuel injection pump for operation of the high-pressure fuel injectors. Check valves within the pump, control direc-
tion of fuel flow and prevent fuel bleed-back during engine shut down.
Maximum current flow to the pump is 5 amperes.
With the engine running, the pump has a 100 percent duty-cycle.
The transfer pump is self-priming: When the key is first turned on (withoutcranking engine), the pump will operate
for approximately 2 seconds and then shut off (Note: When ambient temperatures are cold enough to cause the
intake air heaters to operate, the fuel lift pump will operate during the entire intake air pre-heat cycle). The pump will
also operate for up to 25 seconds after the starter is engaged, and then disengaged and the engine is not running.
The pump shuts off immediately if the key is on and the engine stops running.
The fuel volume of the transfer pump will always provide more fuel than the fuel injection pump requires. Excess
fuel is returned from the injection pump through an overflow valve, and then back to the fuel tank.
REMOVAL
The fuel transfer pump (fuel lift pump) is a part of the fuel tank module. It is not serviced separately. Refer to Fuel
Tank Module Removal or Installation for procedures (Refer to 14 - FUEL SYSTEM/FUEL DELIVERY/FUEL TANK
MODULE - REMOVAL).
INSTALLATION
The fuel transfer pump (fuel lift pump) is a part of the fuel tank module. It is not serviced separately (Refer to 14 -
FUEL SYSTEM/FUEL DELIVERY/FUEL TANK MODULE - INSTALLATION).

Page 2374 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual VALVE - CASCADE OVERFLOW
DESCRIPTION
NOTE: The cascade overflow valve is not serviced separately.
Thecascadeoverflowvalve(4)islocatedonthetop/
rear side of the fuel injection pump.
OPERATION
When the

Page 2375 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual SENSOR-WATER IN FUEL
DESCRIPTION
The Water-In-Fuel (WIF) sensor (5) is located on the
side of the fuel filter/water separator canister.
OPERATION
The sensor sends an input to the Engine Control Module

Page 2376 of 5267

DODGE RAM SRT-10 2006 Service Repair Manual CIRCUIT - FUEL DRAIN
OPERATION
The Fuel Drain Circuit incorporates several sources of fuel return. Fuel travels from the fuel tank (via the fuel trans-
fer pump) and is forced through the fuel filter.

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