2008 FORD F650 ABS

Trailer tow relays (if equipped)
Fuse/Relay
LocationFuse Amp
RatingDescription
1 30A* Trailer tow ABS feed
2 30A* Trailer tow park/marker lamps
3 30A* Trailer tow stop lamps
4 30A* Trailer tow turn/stop lamps (combined)
Trailer tow turn lamps (separate)
5 — Not used
R1 — Trailer tow ABS relay
R2 — Trailer tow marker lamp relay
R3 — Trailer tow stop lamp relay
R4 — Trailer tow tail lamp relay
R5 — Not used
R6 — Not used
R7 — Trailer tow left turn lamp relay
R8 — Trailer tow right turn lamp relay
*Maxi fuse
Inline fuses
Your vehicle has two inline fuses located in/on the battery cables by the
battery. A 10A fuse for the transmission control module and a 40A fuse
2008 F-650/750(f67)
Supplement
USA(fus)
Roadside Emergencies
141

Air brakes - air dryer
Performance of desiccant or after-cooler type air dryers is dependent on
climatic conditions in which your vehicle is operating. Maintenance
schedules must be established for each specific operation.
The use of an air dryer on a vehicle does not eliminate the need to
periodically drain the air reservoirs.
Air brakes - desiccant air dryer
Inspect for moisture in the air system by opening reservoirs, drain cocks
or valves and checking for presence of water. The presence of small
amounts of water due to condensation is normal and should not be
considered as an indication that the dryer is not functioning properly.
The desiccant cartridge should be replaced or rebuilt when it has been
determined that the desiccant is contaminated and does not have
adequate water absorption capacity. The desiccant change interval may
vary; it is generally recommended that the desiccant be replaced every
12 months (yearly). If experience has shown that extended or shortened
life has resulted for a particular installation, then the yearly interval can
be increased or decreased accordingly.
Hydraulic brakes - inspection and adjustment
A regular schedule for periodic cleaning, lubrication, adjustment and
inspection should be established based on the type of vehicle operation.
It is difficult to predetermine an exact maintenance interval (time or
mileage), since vehicles will be used in a wide variety of applications and
conditions. If you are uncertain of the proper schedule and procedures
for your vehicle, contact your dealer.
Inspect the brake lining every maintenance interval. Establish inspection
intervals that provide for lining replacement before damage to the disc
occurs. Excessive lining wear may expose the backing plate to the disc
causing scoring of the disc faces.
This inspection should be performed by a qualified technician and must
be in accordance with instructions provided by the service manual.
Note:Hydraulic brake system are power assisted. Braking capabilities
will be greatly reduced without engine assist.
Hydraulic brakes - fluid level
Fluid level should be at the bottom edge of the ring on each reservoir fill
port. Do not fill the master cylinder to the top of the reservoir.
2008 F-650/750(f67)
Supplement
USA(fus)
Maintenance and Specifications
165

FUEL INFORMATION
Important safety precautions
Do not overfill the fuel tank. The pressure in an overfilled tank
may cause leakage and lead to fuel spray and fire.
The fuel system may be under pressure. If the fuel cap is venting
vapor or if you hear a hissing sound, wait until it stops before
completely removing the cap.
Automotive fuels can cause serious injury or death if misused or
mishandled.
Observe the following guidelines when handling fuel:
•Extinguish all smoking materials
and any open flames before
fueling your vehicle.
•Always turn off the vehicle before
fueling.
•Automotive fuels can be harmful
or fatal if swallowed. If fuel is swallowed, call a physician immediately,
even if no symptoms are immediately apparent. The toxic effects of
fuel may not be visible for hours.
•Avoid inhaling fuel vapors. Inhaling too much fuel vapor of any kind
can lead to eye and respiratory tract irritation. In severe cases,
excessive or prolonged breathing of fuel vapor can cause serious
illness and permanent injury.
•Avoid getting fuel liquid in your eyes. If fuel is splashed in the eyes,
remove contact lenses (if worn), flush with water for 15 minutes and
seek medical attention. Failure to seek proper medical attention could
lead to permanent injury.
•Fuels can also be harmful if absorbed through the skin. If fuel is
splashed on the skin and/or clothing, promptly remove contaminated
clothing and wash skin thoroughly with soap and water. Repeated or
prolonged skin contact with fuel liquid or vapor causes skin irritation.
2008 F-650/750(f67)
Supplement
USA(fus)
Maintenance and Specifications
175

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 Silicone Brake Caliper Grease and Dielectic
Compound 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 ensure 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 times.
•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 ensure a “like
new” condition when re-torquing.
Note:See theU-Bolt Nut Torquechart later in this section.
2008 F-650/750(f67)
Supplement
USA(fus)
Maintenance and Specifications
193

Rotating tires from one wheel position to another is a way often used to
even out many types of irregular wear or to avoid it altogether. Some of
the more effective tire rotation programs are:
•Steer tires that have developed some type of irregular wear pattern
can be rotated to drive axles if rib tires are being used on all wheel
positions. Applying steer tires to a drive position will often clean them
and they can be moved back to the steer axles or run out to re-tread
stage on the rear axle.
•Another rotation possibility for fleets with rib tires in all wheel
positions is to break in the new steer tires in the drive axle positions,
then move them to steer axles. This will wear away tread rubber
relatively quickly in the early life of a tire when it is most likely to
develop an unusual wear pattern.
•Drive axle tires may be placed on the other end of the same axle so
that direction of rotation is reversed. This is often helpful if a heel and
toe or alternate lug wear pattern has developed.
Irregular wear can be minimized by:
•Using the right inflation pressure for the load being carried.
•Maintaining proper front wheel alignment -especially toe-in-to
specifications.
•Maintaining proper tire and wheel balance.
•Maintaining shock absorbers and suspension components.
Use of tire chains
Refer to chain manufacturer’s recommendation for correct tire chain
usage, installation and removal.
2008 F-650/750(f67)
Supplement
USA(fus)
Maintenance and Specifications
208

Among those acts presumed to constitute tampering are the following
acts listed:
Vehicle System Acts
Acoustical Shielding Removal of noise shields, hood
blanket, tunnel liner or acoustical
absorptive material.
Engine Removal or rendering inoperative
the engine speed governor so as to
allow engine speed to exceed
manufacturer specifications.
Removal of engine mounted noise
shield or oil pan enclosure.
Engine Air Induction System Removal of the air duct, silencer,
air cleaner, and/or air cleaner
element and baffle in air cleaner;
re-indexing of air cleaner.
Exhaust System Removal or rendering inoperative
exhaust system components
including the catalytic converter -
muffler assembly, inlet pipe, outlet
pipe, resonator and flexpipe.
Rotation of horizontal exhaust
system directional outlet pipe to
cause the exhaust to be emitted in
a direction other than the
orientation the vehicle was
originally produced with.
Engine Cooling System Removal or rendering inoperative
the fan clutch. Removal or
modification of the fan shroud.
Replacing a fixed fan with a fan of
increased diameter, different
number of blades or different pitch
width.
2008 F-650/750(f67)
Supplement
USA(fus)
Scheduled Maintenance Guide
231

Maintenance Operation Frequency - Observation
Check the engine performance
and the engine governorExcessive engine noise.
Inspect the fan, the fan shroud,
and the fan clutchEngine overheats, fan runs at high
speed constantly, excessive fan noise,
or fan wobble due to worn bearings.
Check for operation of ABS
warning lampAt each engine start up.
Inspect the entire exhaust
system (including inlet pipe,
muffler, outlet pipe and all
exhaust clamps and fasteners)
for holes, leakage, breakage,
looseness and corrosive
damageExcessive noise or the smell of fumes
is experienced.
Inspect the engine air
induction system (including the
air ducts and the air filter) for
loose fitting, damaged or
missing componentsExcessive noise emanates from the
engine compartment.
Inspect the tires and check the
air pressure
(3)Poor steering, wandering or excessive
tire wear.
Balance the wheels and the
tiresVibration or abnormal tire wear
indicates imbalance.
Check the front end alignment
(3)Poor steering, wandering or excessive
tire wear.
Check the transmission and
engine mountings
(2)Hard shifting or excessive vibration.
Check and adjust transmission
controls
(2)High effort to shift or noisy
transmission.
Check fuel pump pressure Insufficient full-throttle power or
backfiring.
Clean radiator cap seal. Clean
and inspect the cap surface on
the radiatorWhen the cap does not hold pressure.
2008 F-650/750(f67)
Supplement
USA(fus)
Scheduled Maintenance Guide
238

A
Air conditioning ..........................45
manual heating and air
conditioning system .................45
Air suspension ...........................113
Anti-lock brake system
(see Brakes) ..............................111
Audio system
(see Radio) ......................32, 34, 38
Automatic transmission ............115
fluid, adding ............................190
fluid, checking ........................190
fluid, refill capacities ..............224
fluid, specification ..................209
Auxiliary power point .................53
Axle ............................123, 162, 195
lubricant specifications ..........209
refill capacities ........................222
B
Battery .......................................171
charging system warning
light ............................................21
jumping a disabled battery ....142
voltage gauge ............................27
Belt-Minder...............................74
Brakes ............................92, 97, 162
adjustment ..............................165
anti-lock ...................................111
anti-lock brake system (ABS)
warning light .....................21, 111
brake warning light ..................21
fluid, checking and
adding ..............................165, 188
fluid, specifications .................209
parking ......................93, 100, 166
Bulbs ............................................49C
Catalytic converter
(see Emission control) .............166
CD-single premium .....................32
Cell phone use ..............................7
Child safety restraints ................78
child safety belts ......................78
Child safety seats ........................81
attaching with tether straps ....84
in front seat ..............................82
in rear seat ................................82
tether anchorage hardware .....84
Child safety seats - booster
seats .............................................79
Cleaning your vehicle
chrome and aluminum
parts .........................................156
engine compartment ..............156
exterior ....................................158
instrument panel ....................157
interior .....................................157
interior trim ............................157
plastic parts ............................156
washing ....................................155
waxing .....................................155
wheels ......................................156
Climate control (see Air
conditioning or Heating) ......44–45
Clutch ................................117, 188
adjusting ..................................189
fluid ..........................................188
operation while driving ..........117
specifications ..........................209
Controls
power seat .................................65
Coolant ......................................173
refill capacities ........................224
specifications ..........................209
2008 F-650/750(f67)
Supplement
USA(fus)
Index
262