Dodge RAM TRUCK 1500 1995 Service Manual page 1104

HEAT
SHIELD
STRAP MOUNTING
NUTS J9414-39
Fig, 4 Fuel Tank Mounting—Typical
Diesel Powered Engines:
(a) Connect the electrical connector to the fuel
tank module (Fig. 8).
(b) Connect the fuel supply and fuel return lines
at the fuel tank module (Fig. 8). Refer to Fuel
Tubes/Lines/Hoses and Clamps in this group for ad­
ditional information about fuel line removal and in­
stallation. Also refer to Quick-Connect Fittings in
this group.
(6) Install the rubber fill and vent lines to tank.
Tighten hose clamps to 2.3 N-m (20 in. lbs.) torque.
(7) Refill fuel tank and inspect all hoses and lines
for leaks.
(8) Connect negative battery cable to battery.
FUEL PUMP '
Gas Powered Engines; An electric in-tank
mounted fuel pump is used with gas powered en­
gines. Refer to' Fuel Pump Module in the Fuel Deliv­
ery System—Except Diesel section of this group.
Diesel Powered Engines: A mechanically oper­
ated low-pressure fuel transfer pump and a mechan­
ically operated high-pressure fuel injection pump are
used to supply fuel for the diesel engine. Refer to the
Fuel Delivery—Diesel Engine section of this group
for information on the fuel injection pump and fuel
transfer pump.
FUEL GAUGE SENDING UNIT
The fuel gauge sending unit is attached to the side
of the fuel pump module on gas powered engines. It
is attached to the side of the fuel tank module on die­
sel powered engines. Refer to either of the Fuel De­
livery System sections of this group for fuel gauge
sending unit service.
FUEL TANK CAPACITIES
Refer to the Specifications section at the end of this
group.
HEAT SHIELDS
Some fuel line components are covered by sheet
metal heat shields. They may have to be removed
when servicing the fuel tank, fuel tubes/lines or va­
por vent line, it is very important that these heat
shields be reinstalled after service. They are
used to protect lines and tank from heat of exhaust
system. See Group 11 in this manual for proper in­
stallation.
FUEL TANK FILLER TUBE CUP
The loss of any fuel or vapor out of filler neck is
prevented by the use of a pressure-vacuum fuel tank
filler tube cap. Relief valves inside cap will release
only under significant pressure of 6.58 to 8.44 kPa
(1.95 to 2.5 psi). The vacuum release for all gas caps
is between .97 and 2.0 kPa (.14 and .29 psi). This cap
must be replaced by a similar unit if replacement is
necessary. This is in order for the system to remain
effective.
CAUTION: Remo e f"f~; ^.nk ftibw ^.ibe osp bmom
servicing any fuel system mmponrnt
" H T I S
is
clone
to help relieve tank pressure.
NO-LEAD FUEL T i l l FILLER TUBE
GAS POWERED ENGINES
All catalyst equipped vehicles have a special fuel
tank filler tube. The fuel filler opening is smaller in
diameter than those used for non-catalyst vehicles to
permit entry of only the smaller no-lead fuel nozzles.
A deflector is installed in the fuel filler opening. The
deflector is opened by the no-lead fuel nozzle.
The fuel filler tube on these models has a one-way
ball check valve. The valve is designed to prevent
fuel back splash which may occur while filling the
tank.
A label is attached to instrument panel under fuel
gauge that reads UNLEADED FUEL ONLY as a re­
minder to driver. A similar label is located near fuel
tank filler.
FUEL TANK PRESSURE RELIEF/ROLLOVER VALVE
The fuel tanks of all vehicles have a pressure relief/
rollover valve. The valves relieve fuel tank pressure
and prevent fuel flow through fuel tank vent hoses
during rollover. All vehicles pass a full 360 degree
rollover without fuel leakage.