Catalytic converter
If your Diesel engine is equipped with a catalytic converter, it is
important to review the maintenance schedule to insure proper
functioning of the catalytic converter. Also, take precautions not to
damage the catalytic converter when servicing your engine or storing
your vehicle.
Note:If your vehicle is equipped with a catalytic converter/muffler,do
notblend waste oil with Diesel fuel. Operate only on low sulfur (less
than 500 parts per million sulfur) Diesel fuel with a cetane value of 45 or
higher.
Note:If your vehicle is equipped with a vertical exhaust pipe, it is very
important to have and maintain a rain cap on the exhaust pipe to
prevent water from entering the exhaust system and catalytic converter.
Any water entering the catalytic converter may damage the catalyst and
affect the function of the converter.
Air induction system
Once each year, perform a complete inspection of the air induction
system. In areas where road salt is used, the inspection consists of
disassembling the joints of each aluminum component and inspecting for
salt build-up, presence of chlorine that can cause aluminum particles to
flake off and enter the engine combustion chambers.
If evidence of corrosion is found (usually at the pipe connections), use a
wire brush to clean the inside of the pipes and inside the rubber hoses.
If the intake pipes are pitted at the joint ends, use RTV silicone to seal
the joints. Be certain that no excess material is on the inside of the pipes
that can be pulled into the engine. If the service condition of the pipes,
hoses or clamps is questionable, replace the defective part(s).
Be sure that prior to reassembly all dust and debris has been cleaned out
of the pipes and couplings with a clean, damp rag.
To reduce the risk of personal injury or death when performing
maintenance to any turbocharged engine with engine air inlet
piping disconnected, a turbocharger compressor air inlet protective
shield should be installed over the turbocharger air inlet.
Cummins B and Caterpillar engines
Refer to the respective engine operator manual for air filter replacement
procedure.
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2. Remove and discard the old fuel
filter element.
3. Carefully clean the mating
surfaces.
Installation-both
The engine will not run properly if the fuel filter is not installed
in housing.
1. Install new fuel filter into the fuel filter housing.
2. Tighten cap onto fuel filter housing slowly, allowing fuel to soak into
the fuel filter element. Tighten cap until it contacts the housing.
After replacing the fuel filter, the engine will purge the trapped
air as it runs. The engine may run roughly and smoke until the air
is completely eliminated.
Using a fuel which has more than average impurities may require
the fuel filter to be replaced more frequently than the service
interval specifies.
Fuel filter replacement - Cummins B engine
Refer to your engine operator’s manual for service intervals and
procedures.
FUEL CONSUMPTION IMPROVEMENT MEASURES
There are two important factors you can control to improve fuel
economy: the mechanical condition of your vehicle and how you drive it.
A properly maintained vehicle will deliver better performance than a
neglected vehicle. Always follow your maintenance schedule to keep your
vehicle in top operating condition.
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•Driving at reasonable speeds (traveling at 55 mph [88 km/h] uses 15%
less fuel than traveling at 65 mph [105 km/h]).
•Using the air conditioner or defroster may reduce fuel economy.
•Resting your foot on the brake pedal while driving may reduce fuel
economy.
Conditions
•Carrying unnecessary weight may reduce fuel economy.
•Fuel economy may decrease with lower temperatures during the first
8–10 miles (12–16 km) of driving.
•Flat terrain driving improves fuel economy over hilly roads.
•Transmissions give their best fuel economy when operated in the top
cruise gear and with steady pressure on the accelerator.
•Close windows for highway driving.
NOISE EMISSIONS–EXTERIOR
In order to comply with the federal exterior noise regulations, your
vehicle may be equipped with noise emission items. Depending on the
vehicle configuration, it may have all or some of the following items:
Air Intake System
•Air Cleaner:should be inspected and its location should not be
altered. Do not alter inlet and outlet piping.
Body
•Wheel Well:splash shields, cab shields and under-hood insulation
should be inspected for deterioration, dislocation, and orientation.
Cooling System
•Check the fan for damage to blades; replace, if damaged, with the
recommended parts. Inspect for fan to shroud interference, and any
damage to shroud such as cracks and holes.
•The fan ratio should not be changed and the fan spacer dimensions
and positions should not be altered.
•Inspect the fan clutch for proper operation, make sure that the fan is
disengaged when cooling of the engine is not required.
•Check for proper operation of radiator shutters, if equipped. The
shutters should be open during normal operating temperatures.
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ELECTRICAL SYSTEM INSPECTIONS
Periodically inspect electrical connectors on the outside of the cab, on the
engine and frame for corrosion and tightness. Exposed terminals such as
the fuel sender, cranking motor, alternator and feed-through studs should
be cleaned and re-coated with a lubricant sealing grease such as Motorcraft
XG-3, or equivalent. This should include the ground cable connector for
batteries, engine and cab as well as the jump starting stud.
Accessory feed connections
Vehicle electrical systems are complex and often include electronic
components such as engine and transmission controls, instrument panels,
ABS, etc. While most systems operate on battery voltage (12 volts),
some systems can be as high as 90 volts or as low as five volts. Refer to
the Electrical Circuit Diagram Manuals, available from your vehicle’s
manufacturer, to assure that any additional body lights and accessories
are connected to circuits that are both appropriate and not overloaded.
No modification should be made to any vehicle control system without
first contacting your dealer.
SUSPENSION INSPECTION
Note:Do not adjust air suspension height to any setting other than the
specified setting. Altering the height setting will change the driveline
angle and may result in unwarrantable component damage, such as
transmission component damage.
Verify drive axle air suspension height and height control valve
performance at engine lube oil change intervals.
Periodically:
•Check condition of spring leaves for evidence of fatigue, bending or
breakage.
•Check condition of suspension mounting brackets and bushings.
•Check that torque rod mounting fasteners are tight.
•Check to be sure the suspension alignment is maintained at all time.
•Check U-bolts after the chassis has been operating under load for
1,000 miles (1,600 km) or six months, whichever comes first, the
U-Bolt nuts must be re-torqued. The U-Bolt nuts thereafter must be
re-torqued every 36,000 miles (58,000 km). The U-Bolt and nut
threads and seats should be cleaned and lubricated to assure a“like
new”condition when re-torquing.
Note:See theU-Bolt Nut Torquechart later in this section.
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Air suspension U-bolt checks and re-torquing procedures
1. Inspect the threads of the U-bolt and nut for rust and debris. Clean
the threads if contaminated.
2. Using a torque wrench, determine if any nuts can be turned with a
force below the specified torque.
3. Using the lowest discovered torqued nut as a starting point, retighten
the nuts using the sequence listed underAir suspension U-bolt and
U-bolt nut installation.
Air suspension U-bolt and U-bolt nut installation
1. Inspect the threads of the U-bolt and nut for rust and debris. Clean
the threads if contaminated.
2. Install the U-bolts and nuts and torque the nuts to 15 ft. lbs. (20
N•m), using a diagonal pattern.
3. Re-torque the nuts to 100 ft. lbs. (136 N•m), using a diagonal pattern.
4. Re-torque the nuts to 200 ft. lbs. (271 N•m), using a diagonal pattern.
5. Re-torque the nuts to 400 ft. lbs. (542 N•m), using a diagonal pattern.
(For vehicles equipped with 14ACC, 14 ADN and 14ADP axles, do not
use Step 6.)
6. Re-torque the nuts to 425 ft. lbs (576 N•m), using a diagonal pattern.
(For vehicles equipped with 14ACC, 14 ADN and 14ADP axles.)
7. Use the same diagonal pattern with each U-bolt nut re-torque.
Spring U-bolt checks
Check U-bolt nuts and re-torque every 36,000 miles (58,000 km) after
initial 1,000 miles (1,600 km) re-torque. The U-bolt and nut threads and
seats should be cleaned and lubricated to assure peak condition when
re-torqued.
PROPELLER SHAFT
At the regular lubrication interval, check the universal joints for any
evidence of wear or looseness. Should propeller shaft vibrations occur,
stop the vehicle immediately to avoid possible hazardous consequences
or damage to other components.
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Air conditioner refrigerant - r134a
Lbs. (Kg) Oz.
1.87 (.85) 30
Note:This system uses PAG-type refrigerant oil.
Refrigerant fitting torque
Captured washer nut: 170–190 inch lbs. (19–21 N•m)
Note:This system uses mineral based refrigerant oil to lubricate o-rings
and fittings.
Fuel tanks
Standard tanks are listed as such; all other tanks available for your
vehicle are optional equipment.
Vehicle Tank type Gallsons Liters
F-650 Low Profile
(standard), F-650
Dock HeightSingle, steel
rectangular35 132
F-650 Low Profile,
F-650 Dock Height
(standard), F-750
Pick-up and
Delivery
(standard), F-750
Severe Service
(standard)Single, steel
rectangular45 170
F-650 Dock Height,
F-750 Pick-up and
Delivery, F-750
Severe ServiceSingle, steel
rectangular50 189
F-650–Low Profile,
F-650 Dock Height,
F-750 Pick-up and
Delivery, F-750
Severe ServiceSingle, steel
rectangular65 246
F-650 Dock Height,
F-750 Pick-up and
Delivery, F-750
Severe ServiceSingle, steel D-style 65 246
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GENERAL MAINTENANCE INFORMATION
The Scheduled Maintenance Services listed in this section are required
because they are considered essential to the life and performance of
your vehicle.
Ford Motor Company recommends you perform the Owner Maintenance
Services listed in this section. These services are matters of day-to-day
care that are important to the proper operation of your vehicle. In
addition to the conditions described in the Owner Maintenance Checklist,
be alert for any unusual noise, vibration or other indication that your
vehicle may need service and attend to it promptly.
Use only recommended fuels, lubricants, fluids and service parts
conforming to Ford specifications. Motorcraft parts are designed and
built for best performance in your vehicle. Using these parts for
replacement is your assurance that Ford-Built quality stays in your
vehicle.
SCHEDULED MAINTENANCE
The maintenance or replacement of the emission control devices (or
systems) in your new Ford Motor Company vehicle (or engine) may be
performed at your expense. These services may be performed by any
automotive repair establishment or individual using automotive parts
equivalent to those with which your vehicle or engine was originally
equipped. If any parts other than Ford, Motorcraft, or Ford authorized,
remanufactured parts are used for maintenance replacements (or for the
service) of components effecting the emission control, the owner should
be assured that such parts are warranted by their manufacturer to be
equivalent to genuine Ford Motor Company Parts in performance and
durability. Please consult your warranty information booklet for complete
warranty information.
Authorized dealer maintenance
Your authorized dealer specializes in knowing all about Ford Motor
Company vehicles rather than knowing a little about all makes.
There are Ford or Ford of Canada dealer service shops ready to serve
you wherever you drive in the U.S. or Canada. They stock Ford and
Motorcraft parts, and Ford Chemicals and lubricants. You can be
confident that these meet the same exacting design and quality
standards as those used to build the vehicle originally. Dealer Service
Technicians have available training in the latest product developments
and service techniques.
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SCHEDULED MAINTENANCE SERVICES
Maintenance service adjustments must conform to specifications
contained in this manual, and those shown on the Important Engine
Information Decal. The following services are to be performed at
scheduled intervals because they are considered essential to the life and
performance of your vehicle. Ford recommends that you perform
maintenance on all designated items to achieve best vehicle operation.
Scheduled maintenance beyond 100,000 miles (161,000 km) should be
continued as before 100,000 miles (161,000 km).
SPECIAL OPERATING CONDITIONS
If your driving habitsfrequentlyinclude one or more the following
conditions:
•Short trips oflessthan 10 miles (16 km) when outside temperatures
remain below freezing.
•Operating duringhot weatherin stop-and-go“rush hour”traffic.
•Operating in severe dust conditions.
•Extensive idling, or low speed operation such as door-to-door delivery
service.
•High speed operation with a fully loaded vehicle (maximum GVW).
•Snowplowing.
Perform the following:
•Change engine oil and oil filter every three months, 5,000 miles (8,000
km) or 125 hours of engine service.
•If operating in severe dust conditions, replace the air cleaner filter
more often than regular intervals as determined by the air filter
restriction indicator. Make sure that the air filter restriction indicator
is in good working order.
•Lube the manual transmission and the rear axle every 30,000 miles
(48,279 km) or six months, whichever comes first.
•See the Allison, Cummins and Caterpillar Operator’s Manual.
AIR BRAKE ADJUSTMENT
Failure to maintain proper air brake adjustment can result in
reduction or loss of braking ability.
Air brake inspection and adjustment should be performed by a qualified
service technician in accordance with the instructions in the Ford Truck
Service Manual.
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