heater DODGE RAM 2002 Service Repair Manual

INSPECTION
Inspect the exhaust manifold for cracks. Measure
the exhaust manifold for flatness. Place a ruler over
all of the exhaust ports and insert a feeler gauge
between the port flange and the ruler.
INSTALLATION
(1) Using new gaskets, install the exhaust mani-
fold and gaskets. Install the bolts and spacers and
tighten the bolts in the sequence shown in (Fig. 172)
to 43 N´m (32 ft. lbs.) torque.
(2) Install the cab heater return hose to the man-
ifold bolt stud. Tighten the nut to 24 N´m (18 ft. lbs.)
torque.
(3) Install the turbocharger. Apply anti-seize to the
studs and then tighten the turbocharger mounting
nuts to 32 N´m (24 ft. lbs.) torque.
(4) Install the oil drain tube and oil supply line to
the turbocharger. Tighten the drain tube bolts to 24
N´m (18 ft. lbs.) torque.
(5)Pre-lube the turbocharger.Pour 50 to 60 cc
(2 to 3 oz.) clean engine oil in the oil supply line fit-
ting. Rotate the turbocharger impeller by hand to
distrubute the oil thoroughly.
(6) Install and tighten the oil supply line fitting
nut to 20 N´m (133 in. lbs.) torque.
Fig. 170 Turbocharger Air Inlet Hose
1 - AIR FILTER HOUSING COVER
2 - TURBOCHARGER
3 - AIR INLET TUBE
4 - HOSE CLAMP
5 - HINGE TABS
6 - FILTER MINDER
7 - CLIPS (4)
8 - TUBE ALIGNMENT NOTCHES
Fig. 171 Oil Supply Line and Charge Air Cooler Inlet
Duct
1 - EXHAUST PIPE
2 - TURBOCHARGER
3 - AIR INLET TUBE
4 - INTERCOOLER INLET DUCT
5 - WASTE GATE ACTUATOR
Fig. 172 Exhaust Manifold and Gaskets
9 - 186 ENGINE 5.9L DIESELBR/BE
EXHAUST MANIFOLD (Continued)

SPECIFICATIONS
TORQUE
DESCRIPTION N´m Ft. In.
Lbs. Lbs.
Adjusting StrapÐBolt 23 Ð 200
Air Heater Power SupplyÐ
Nuts14 Ð 124
Air Inlet HousingÐBolts 24 18 Ð
Cab Heater Supply/Return
LineÐNuts24 18 Ð
Exhaust ClampÐNuts 48 35 Ð
Exhaust Manifold to Cylinder
HeadÐBolts
(Diesel Engine) 43 32 Ð
Exhaust Manifold to Cylinder
HeadÐBolts
(5.9L) 31 23 Ð
Exhaust Manifold to Cylinder
HeadÐBolts
(8.0L) 22 Ð 195
Exhaust Pipe to ManifoldÐ
Bolts31 23 Ð
Generator MountingÐBolts 41 30 Ð
Charge Air Cooler
MountingÐBolts2Ð17
Charge Air Cooler DuctÐ
Nuts8Ð72
Heat ShieldÐNuts and Bolts 11 Ð 100
Turbocharger MountingÐ
Nuts32 24 Ð
Turbocharger Oil Drain
TubeÐBolts24 18 Ð
Turbocharger Oil Supply
LineÐFitting15 Ð 133
Turbocharger V-Band
ClampÐNut9Ð75
CATALYTIC CONVERTER -
3.9L/5.2L/5.9L
DESCRIPTION
The stainless steel catalytic converter is located
under the vehicle, integral to the exhaust pipe(s).
OPERATION
The catalytic converter captures and burns any
unburned fuel mixture exiting the combustion cham-
bers during the exhaust stroke of the engine. This
process aids in reducing emissions output.
REMOVAL
(1) Raise and support vehicle.
(2) Saturate the bolts and nuts with heat valve
lubricant. Allow 5 minutes for penetration.
(3) Remove clamps and nuts (Fig. 3) (Fig. 4).
(4) Remove the catalytic converter.
Fig. 3 Catalytic Converter and Exhaust Pipe 3.9L,
5.2L and 5.9L Light Duty ( Federal )
1 - BOLT
2 - EXHAUST PIPE W/CONVERTER
3 - NUT
4 - RETAINER
BR/BEEXHAUST SYSTEM 11 - 5
EXHAUST SYSTEM (Continued)

CHARGE AIR COOLER AND
PLUMBING
DESCRIPTION
The charge air system (Fig. 29) consists of the
charge air cooler piping, charge air cooler and intake
air grid heater.
The charge air cooler is a heat exchanger that uses
air flow from vehicle motion to dissipate heat from
the intake air. As the turbocharger increases air
pressure, the air temperature increases. Lowering
the intake air temperature increases engine effi-
ciency and power.
OPERATION
Intake air is drawn through the air cleaner and
into the turbocharger compressor housing. Pressur-
ized air from the turbocharger then flows forward
through the charge air cooler located in front of the
radiator. From the charge air cooler the air flows
back into the intake manifold.
DIAGNOSIS AND TESTING - CHARGE AIR
COOLER SYSTEM - LEAKS
Low turbocharger boost pressure and low engine
preformance can be caused by leaks in the charge air
cooler or it's plumbing. The following procedure out-
lines how to check for leaks in the charge air cooler
system.(1) Loosen clamp and remove turbocharger to air
inlet duct rubber sleeve from turbocharger (Fig. 30).
(2) Insert Special Tool 8442 Adapter into the rub-
ber sleeve. Tighten existing clamp to 8 N´m (72
in.lbs.).
CAUTION: Do not apply more than 138 kpa (20 psi)
air pressure to the charge air cooler system, sever
damage to the charge air cooler system may occur.
(3) Connect regulated air supply to air fitting on
Special Tool 8442 Adapter. Set air pressure to a Max-
imum of 138 kpa (20 psi).
(4) Using soapy water check the air inlet ducts,
rubber sleeves, charge air cooler and intake manifold
for leaks.
REMOVAL
WARNING: IF THE ENGINE WAS JUST TURNED
OFF, THE AIR INTAKE SYSTEM TUBES MAY BE
HOT.
(1) Disconnect the battery negative cables.
(2) Remove the front bumper (Refer to 13 -
FRAMES & BUMPERS/BUMPERS/FRONT
BUMPER - REMOVAL).
(3) Remove the front support bracket.
Fig. 29 Intake Air Circulation
1 - CHARGE AIR COOLER
2 - AIRFILTER
3 - TURBOCHARGER
Fig. 30 AIR INLET DUCT RUBBER SLEEVE
1 - CLAMP
2 - TURBOCHARGER
3 - AIR DUCT RUBBER SLEEVE
4 - AIR INLET DUCT
11 - 18 EXHAUST SYSTEMBR/BE

(2) Clean the area around the sensor before
removal.
(3) Remove the two sensor mounting bolts.
(4) Remove the sensor from the intake manifold.
INSTALLATION
INSTALLATION - 5.9L
The MAP sensor is located on the front of the
throttle body (Fig. 35). An L-shaped rubber fitting is
used to connect the MAP sensor to throttle body (Fig.
36).
(1) Install rubber L-shaped fitting to MAP sensor.
(2) Position sensor to throttle body while guiding
rubber fitting over throttle body vacuum nipple.
(3) Install MAP sensor mounting bolts (screws).
Tighten screws to 3 N´m (25 in. lbs.) torque.
(4) Install air cleaner.
INSTALLATION - 8.0L
The MAP sensor is mounted into the right upper
side of the intake manifold (Fig. 37). A rubber gasket
is used to seal the sensor to the intake manifold. The
rubber gasket is part of the sensor and is not ser-
viced separately.
(1) Check the condition of the sensor seal. Clean
the sensor and lubricate the rubber gasket with clean
engine oil.
(2) Clean the sensor opening in the intake mani-
fold.
(3) Install the sensor into the intake manifold.
(4) Install sensor mounting bolts. Tighten bolts to
2 N´m (20 in. lbs.) torque.
(5) Install the electrical connector to sensor.
O2 SENSOR
DESCRIPTION
The Oxygen Sensors (O2S) are attached to, and
protrude into the vehicle exhaust system. Depending
on the emission package, the vehicle may use a total
of either 2 or 4 sensors.
Medium and Heavy Duty 8.0L V-10 Engine:
Four sensors are used (2 upstream, 1 pre-catalyst
and 1 post-catalyst). With this emission package, the
1/1 upstream sensor (left side) is located in the left
exhaust downpipe before both the pre-catalyst sensor
(1/2), and the main catalytic convertor. The 2/1
upstream sensor (right side) is located in the right
exhaust downpipe before both the pre-catalyst sensor
(1/2), and the main catalytic convertor. The pre-cata-
lyst sensor (1/2) is located after the 1/1 and 2/1 sen-
sors, and just before the main catalytic convertor.
The post-catalyst sensor (1/3) is located just after the
main catalytic convertor.
Heavy Duty 5.9L Engine:Two sensors are used.
They arebothreferred to as upstream sensors (left
side is referred to as 1/1 and right side is referred to
as 2/1). With this emission package, a sensor is
located in each of the exhaust downpipes before the
main catalytic convertor.
OPERATION
An O2 sensor is a galvanic battery that provides
the PCM with a voltage signal (0-1 volt) inversely
proportional to the amount of oxygen in the exhaust.
In other words, if the oxygen content is low, the volt-
age output is high; if the oxygen content is high the
output voltage is low. The PCM uses this information
to adjust injector pulse-width to achieve the
14.7±to±1 air/fuel ratio necessary for proper engine
operation and to control emissions.
The O2 sensor must have a source of oxygen from
outside of the exhaust stream for comparison. Cur-
rent O2 sensors receive their fresh oxygen (outside
air) supply through the O2 sensor case housing.
Four wires (circuits) are used on each O2 sensor: a
12±volt feed circuit for the sensor heating element; a
ground circuit for the heater element; a low-noise
sensor return circuit to the PCM, and an input cir-
cuit from the sensor back to the PCM to detect sen-
sor operation.
Oxygen Sensor Heaters/Heater Relays:
Depending on the emissions package, the heating ele-
ments within the sensors will be supplied voltage
from either the ASD relay, or 2 separate oxygen sen-
sor relays. Refer to 8, Wiring Diagrams to determine
which relays are used.
The O2 sensor uses a Positive Thermal Co-efficient
(PTC) heater element. As temperature increases,
resistance increases. At ambient temperatures
Fig. 37 MAP Sensor LocationÐ8.0L V-10 EngineÐ
Typical
1 - MAP SENSOR
2 - MOUNTING BOLTS
3 - THROTTLE BODY
BR/BEFUEL INJECTION - GASOLINE 14 - 45
MANIFOLD ABSOLUTE PRESSURE SENSOR (Continued)

around 70ÉF, the resistance of the heating element is
approximately 4.5 ohms. As the sensor's temperature
increases, resistance in the heater element increases.
This allows the heater to maintain the optimum
operating temperature of approximately 930É-1100ÉF
(500É-600É C). Although the sensors operate the
same, there are physical differences, due to the envi-
ronment that they operate in, that keep them from
being interchangeable.
Maintaining correct sensor temperature at all
times allows the system to enter into closed loop
operation sooner. Also, it allows the system to remain
in closed loop operation during periods of extended
idle.
In Closed Loop operation, the PCM monitors cer-
tain O2 sensor input(s) along with other inputs, and
adjusts the injector pulse width accordingly. During
Open Loop operation, the PCM ignores the O2 sensor
input. The PCM adjusts injector pulse width based
on preprogrammed (fixed) values and inputs from
other sensors.
Upstream Sensors:Two upstream sensors are
used (1/1 and 2/1). The 1/1 sensor is the first sensor
to receive exhaust gases from the #1 cylinder. They
provide an input voltage to the PCM. The input tells
the PCM the oxygen content of the exhaust gas. The
PCM uses this information to fine tune fuel delivery
to maintain the correct oxygen content at the down-
stream oxygen sensors. The PCM will change the air/
fuel ratio until the upstream sensors input a voltage
that the PCM has determined will make the down-
stream sensors output (oxygen content) correct.
The upstream oxygen sensors also provide an input
to determine mini-catalyst efficiency. Main catalytic
convertor efficiency is not calculated with this pack-
age.
Downstream Sensors:Two downstream sensors
are used (1/2 and 2/2). The downstream sensors are
used to determine the correct air-fuel ratio. As the
oxygen content changes at the downstream sensor,
the PCM calculates how much air-fuel ratio change is
required. The PCM then looks at the upstream oxy-
gen sensor voltage, and changes fuel delivery until
the upstream sensor voltage changes enough to cor-
rect the downstream sensor voltage (oxygen content).
The downstream oxygen sensors also provide an
input to determine mini-catalyst efficiency. Main cat-
alytic convertor efficiency is not calculated with this
package.
Medium and Heavy Duty 8.0L V-10 Engine:
Four oxygen sensors are used (2 upstream, 1 pre-cat-
alyst and 1 post-catalyst). The upstream sensors (1/1
and 2/1) will fine-tune the air-fuel ratio through the
Powertrain Control Module (PCM). The pre-catalyst
(1/2) and post-catalyst (1/3) sensors will determine
catalytic convertor efficiency (efficiency of the maincatalytic convertor). This is also done through the
PCM.
Heavy Duty 5.9L Engine:Downstream sensors
are not used with this emissions package, meaning
catalytic convertor efficiency is not calculated with
this package. Two upstream sensors are used. The
left upstream sensor (1/1) will monitor cylinders 1, 3,
5 and 7. The right upstream sensor (2/1) will monitor
cylinders 2, 4, 6 and 8. The PCM monitors the oxy-
gen content of the sensors, and will fine-tune the air-
fuel ratio.
Engines equipped with either a downstream sen-
sor(s), or a post-catalytic sensor, will monitor cata-
lytic convertor efficiency. If efficiency is below
emission standards, the Malfunction Indicator Lamp
(MIL) will be illuminated and a Diagnostic Trouble
Code (DTC) will be set. Refer to Monitored Systems
in Emission Control Systems for additional informa-
tion.
REMOVAL
Never apply any type of grease to the oxygen
sensor electrical connector, or attempt any sol-
dering of the sensor wiring harness.
The O2S (oxygen sensors) are numbered 1/1, 1/2,
1/3, 2/1 and 2/2.
On HDC engines, the pre-catalyst/post catalyst
O2S sensors are located at the inlet and outlet ends
of the catalytic converter (Fig. 38).
The 1/1 and 2/1 sensors are located before the
mini-cats (Fig. 39). The 1/2 and 2/2 sensors are
located after the mini-cats (Fig. 39).
WARNING: THE EXHAUST MANIFOLD, EXHAUST
PIPES AND CATALYTIC CONVERTER BECOME
VERY HOT DURING ENGINE OPERATION. ALLOW
ENGINE TO COOL BEFORE REMOVING OXYGEN
SENSOR.
Fig. 38 Pre-catalyst/Post catalyst Oxygen SensorsÐ
HDC Engines
1 - POST CATALYST OXYGEN SENSOR (1/3)
2 - PRE-CATALYST OXYGEN SENSOR (1/2)
14 - 46 FUEL INJECTION - GASOLINEBR/BE
O2 SENSOR (Continued)

FUEL DELIVERY - DIESEL
TABLE OF CONTENTS
page page
FUEL DELIVERY - DIESEL
DESCRIPTION
DESCRIPTION - DIESEL FUEL DELIVERY
SYSTEM............................55
OPERATION.........................55
DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - FUEL SYSTEM
AIR LEAK VACUUM TEST...............57
DIAGNOSIS AND TESTING - AIR IN FUEL
SYSTEM............................60
DIAGNOSIS AND TESTING - FUEL SUPPLY
RESTRICTIONS.......................60
STANDARD PROCEDURE
STANDARD PROCEDURES - WATER
DRAINING AT FUEL FILTER..............61
STANDARD PROCEDURES - CLEANING
FUEL SYSTEM PARTS.................61
STANDARD PROCEDURE - AIR BLEED....61
SPECIFICATIONS
FUEL SYSTEM PRESSURESÐDIESEL
ENGINES............................62
FUEL INJECTOR FIRING ORDERÐDIESEL . 62
SPECIAL TOOLS
DIESEL FUEL SYSTEM.................63
FUEL FILTER / WATER SEPARATOR
DESCRIPTION.........................63
OPERATION...........................63
REMOVAL.............................64
INSTALLATION.........................65
FUEL HEATER
DESCRIPTION.........................66
OPERATION...........................66
DIAGNOSIS AND TESTING - FUEL HEATER . . . 66
REMOVAL/INSTALLATION................67
FUEL HEATER RELAY
DESCRIPTION.........................67
OPERATION...........................67
DIAGNOSIS AND TESTING - FUEL HEATER
RELAY..............................68
REMOVAL.............................69
INSTALLATION.........................69
FUEL INJECTION PUMP
DESCRIPTION
DESCRIPTIONÐFUEL PUMP 245 H.P......69
DESCRIPTIONÐFUEL PUMP 235 H.P......69
OPERATION...........................70
DIAGNOSIS AND TESTINGÐFUEL INJECTION
PUMP TIMING........................70REMOVAL.............................72
INSTALLATION.........................75
FUEL INJECTION PUMP DATA PLATE
SPECIFICATIONS
FUEL INJECTION PUMP DATA PLATE......77
FUEL LEVEL SENDING UNIT / SENSOR
DESCRIPTION.........................77
OPERATION...........................77
FUEL LINES
DESCRIPTION
DESCRIPTION........................77
DESCRIPTIONÐHIGH PRESSURE FUEL
LINES..............................78
OPERATIONÐHIGH PRESSURE FUEL LINES . 78
DIAGNOSIS AND TESTING - HIGH-
PRESSURE FUEL LINE LEAKS...........78
REMOVAL.............................79
INSTALLATION.........................81
FUEL TANK
DESCRIPTION - DIESEL FUEL TANK........82
FUEL TANK MODULE
DESCRIPTION.........................82
OPERATION...........................82
REMOVAL.............................83
INSTALLATION.........................83
FUEL TRANSFER PUMP
DESCRIPTION.........................83
OPERATION...........................83
DIAGNOSIS AND TESTING - FUEL TRANSFER
PUMP PRESSURE.....................84
REMOVAL.............................86
INSTALLATION.........................87
OVERFLOW VALVE
DESCRIPTION.........................87
OPERATION...........................87
DIAGNOSIS AND TESTING - OVERFLOW
VALVE ..............................87
REMOVAL.............................88
INSTALLATION.........................88
WATER IN FUEL SENSOR
DESCRIPTION.........................89
OPERATION...........................89
REMOVAL.............................89
FUEL DRAIN MANIFOLD
DESCRIPTION.........................89
OPERATION...........................89
REMOVAL.............................90
INSTALLATION.........................90
14 - 54 FUEL DELIVERY - DIESELBR/BE

FUEL DELIVERY - DIESEL
DESCRIPTION
DESCRIPTION - DIESEL FUEL DELIVERY
SYSTEM
The fuel system on the Cummins 24 valveÐTurbo
Diesel Engine uses anelectronically controlled
fuel injection pump with three control modules.
Also refer to the Powertrain Control Module (PCM)
or Engine Control Module sections.
Some fuel system components are shown in (Fig.
1).
The fuel delivery system consists of the:
²Accelerator pedal
²Air cleaner housing/element
²Fuel drain manifold (passage)
²Fuel filter/water separator
²Fuel heater
²Fuel heater relay
²Fuel transfer (lift) pump
²Fuel injection pump
²Fuel injectors
²Fuel heater temperature sensor
²Fuel tank
²Fuel tank filler/vent tube assembly²Fuel tank filler tube cap
²Fuel tank module containing the rollover valve,
fuel gauge sending unit (fuel level sensor) and a sep-
arate fuel filter located at bottom of tank module
²Fuel tubes/lines/hoses
²High-pressure fuel injector lines
²In-tank fuel filter (at bottom of fuel tank mod-
ule)
²Low-pressure fuel supply lines
²Low-pressure fuel return line
²Overflow valve
²Quick-connect fittings
²Throttle cable
²Water draining
OPERATION
WARNING: HIGH-PRESSURE FUEL LINES DELIVER
DIESEL FUEL UNDER EXTREME PRESSURE FROM
THE INJECTION PUMP TO THE FUEL INJECTORS.
THIS MAY BE AS HIGH AS 120,000 KPA (17,405
PSI). USE EXTREME CAUTION WHEN INSPECTING
FOR HIGH-PRESSURE FUEL LEAKS. INSPECT FOR
HIGH-PRESSURE FUEL LEAKS WITH A SHEET OF
CARDBOARD. HIGH FUEL INJECTION PRESSURE
CAN CAUSE PERSONAL INJURY IF CONTACT IS
MADE WITH THE SKIN.
BR/BEFUEL DELIVERY - DIESEL 14 - 55

Fig. 1 FUEL SYSTEM COMPONENTS - DIESEL
1 - ENGINE COOLANT TEMPERATURE (ECT) SENSOR 14 - FUEL SUPPLY LINE (LOW-PRESSURE, TO ENGINE)
2 - THROTTLE LEVER BELLCRANK AND APPS (ACCELERATOR
PEDAL POSITION SENSOR)15 - FUEL TRANSFER (LIFT) PUMP
3 - INTAKE MANIFOLD AIR HEATER/ELEMENTS 16 - OIL PRESSURE SENSOR
4 - HIGH-PRESSURE FUEL LINES 17 - FUEL FILTER/WATER SEPARATOR
5 - FUEL HEATER 18 - DRAIN TUBE
6 - FUEL PRESSURE TEST PORT 19 - WATER-IN-FUEL (WIF) SENSOR
7 - MAP (BOOST) SENSOR 20 - ENGINE CONTROL MODULE (ECM)
8 - FUEL INJECTORS 21 - FUEL PRESSURE TEST PORT
9 - FUEL INJECTOR CONNECTOR 22 - CAMSHAFT POSITION SENSOR (CMP)
10 - INTAKE AIR TEMPERATURE (IAT) SENSOR 23 - OVERFLOW VALVE
11 - FUEL DRAIN MANIFOLD 24 - FUEL INJECTION PUMP
12 - DRAIN VALVE 25 - FUEL HEATER TEMPERATURE SENSOR (THERMOSTAT)
13 - FUEL RETURN LINE (TO FUEL TANK)
14 - 56 FUEL DELIVERY - DIESELBR/BE
FUEL DELIVERY - DIESEL (Continued)

Testing Fuel Transfer Pump
(1) Leave vacuum pump attached to fuel supply
line (Fig. 5).
(2) Disconnect rubber fuel hose from fitting at out-
let side of fuel transfer pump (Fig. 5). To plug / seal
system, install 3/8º rubber cap to this fitting (Fig. 5).
(3) Perform vacuum test. Be careful not to allow
liquid fuel to get into your hand-operated vacuum
pump.
(4) Vacuum leak ? Check/repair all transfer pump
fittings and sealing washers for leaks. Check/repair
rubber hose and clamps at sides of transfer pump for
leaks. Perform another vacuum test. If leak still
present, replace fuel transfer pump.
(5) Vacuum holds ? Proceed.
Testing Fuel Filter / Water Separator
(1) Leave vacuum pump attached to fuel supply
line (Fig. 4).
(2) Disconnect rubber fuel hose located between
VP-44 pump and fuel filter/water separator (Fig. 6).
To allow easier hose removal, remove test port fitting
and fuel inlet line at VP-44 pump (Fig. 6). To plug /
seal system, install 3/8º rubber cap to this outline
line (Fig. 7).
(3) Reconnect rubber fuel hose to fitting at outlet
side of fuel transfer pump (Fig. 5).
(4) Perform vacuum test. Be careful not to allow
liquid fuel to get into hand-operated vacuum pump.(5) Vacuum leak ? Check/repair all fittings and
sealing washers for leaks. Check/repair rubber hose
and clamps for leaks. Check fuel heater and water-
in-fuel sensor o-rings for leaks. Check filter canister
seal at top of canister for leaks. Repair as necessary.
(6) Vacuum holds ? Proceed.
Testing VP-44 Pump and Fuel Return / Drain System Within
Cylinder Head
(1) Leave vacuum pump attached to fuel supply
line (Fig. 4).
(2) Position rubber hose and 2 clamps to VP-44
drain line. Install test port fitting and fuel drain line
to VP-44 pump. Tighten test port fitting to 24 N´m
(18 ft. lbs. or 212 in. lbs.) torque. Position 2 hose
clamps to rubber hose.
(3) Loosen, but do not remove, fuel line support
bracket bolt (Fig. 8).
(4) Disconnect and separate fuel drain line at top
of ªTº fitting (Fig. 8). To plug / seal system, install
3/8º rubber cap to this disconnected line (Fig. 8).
(5) Perform vacuum test. Be careful not to allow
liquid fuel to get into your hand-operated vacuum
pump.
(6) Vacuum leak ?
(a) Check return line banjo bolt and sealing
washers at rear of cylinder head for leaks. Repair
as necessary.
Fig. 4 VACUUM PUMP INSTALLED TO FUEL LINE
1 - FUEL SUPPLY LINE
2 - FUEL TRANSFER PUMP
3 - FUEL RETURN LINE
4 - RUBBER CAP
5 - FLUID CONTAINER
6 - HAND-OPERATED PUMP
Fig. 5 FUEL HOSE AT TRANSFER PUMP
1 - HAND-OPERATED PUMP
2 - RUBBER CAP TO FUEL TRANSFER PUMP OUTLET FITTING
3 - DISCONNECTED FUEL OUTLET HOSE
4 - FUEL TRANSFER PUMP
5 - TRANSFER PUMP INLET FITTING
14 - 58 FUEL DELIVERY - DIESELBR/BE
FUEL DELIVERY - DIESEL (Continued)

SPECIAL TOOLS
DIESEL FUEL SYSTEMFUEL FILTER / WATER
SEPARATOR
DESCRIPTION
The fuel filter/water separator assembly is located
on left side of engine above starter motor (Fig. 13).
The assembly also includes the fuel heater and
Water-In-Fuel (WIF) sensor.
OPERATION
The fuel filter/water separator protects the fuel
injection pump by removing water and contaminants
from the fuel. The construction of the filter/separator
allows fuel to pass through it, but helps prevent
moisture (water) from doing so. Moisture collects at
the bottom of the canister.
Refer to the maintenance schedules for the recom-
mended fuel filter replacement intervals.
For draining of water from canister, refer to Fuel
Filter/Water Separator Removal/Installation section.
A Water-In-Fuel (WIF) sensor is attached to side of
canister. Refer to Water-In-Fuel Sensor Description/
Operation.
The fuel heater is installed into the top of the fil-
ter/separator housing. Refer to Fuel Heater Descrip-
tion/Operation.
Spanner Wrench (Fuel Tank Module Removal/
Installation)Ð6856
Engine Barring (Rotating ) ToolÐ7471B (also part of
Kit #6860)
Fuel Injector Pop Pressure AdaptorÐ8301
Fuel Injector RemoverÐ8318
Fuel Injector Tube (Connector) RemoverÐ8324
Fig. 13 FUEL HEATER LOCATION
1 - FUEL HEATER AND TEMP. SENSOR
2 - FUEL FILTER/WATER SEPARATOR
3 - FUEL HEATER ELECTRICAL CONNECTOR
BR/BEFUEL DELIVERY - DIESEL 14 - 63
FUEL DELIVERY - DIESEL (Continued)