2012 FORD F750 air suspension

Supporting your vehicle for service
Prepare the vehicle for service repairs by doing the following:
1. Park the vehicle on a level concrete floor.
2. Set the parking brake and block the wheels to prevent the vehicle
from moving.
3. Select a jack with a rated capacity sufficient to lift and hold up the
vehicle.
4. Raise the vehicle with the jack applied to the axle(s). DO NOT use the
bumper as a lifting point.
5. Support the vehicle with floor stands under the axle(s). If the axle or
the suspension are being serviced, support the vehicle with floor stands
under the frame side-members, preferably between the axles.
WARNING:Do not use a jack when working under a vehicle. It
may give way, causing the vehicle to fall and result in property
damage, personal injury or death. Always use floor stands to support
the vehicle.
FRAME AND TOW HOOKS
Your vehicle’s chassis is manufactured with frame rails of either HSLA
steel or heat-treated steel; each must be handled in a specific manner to
ensure maximum service life. Consult the service manual or your dealer
before attempting frame repair or modification.
It is important, particularly on vehicles where the tow hooks are used
frequently, to inspect the front and rear tow hooks for damage or a loose
mounting.
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 ensure peak condition when
re-torqued.
U-bolt nut torque
Suspension ft-lb N•m
Front axle – 8500 lb (3856 kg) 180-200 244-271
Front axles – 10000 lb (4536 kg) and higher 260-300 353-407
Maintenance and Specifications
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Suspension ft-lb N•m
Rear axle with multi-leaf 260-300 353-407
Rear axle with IROS air suspension 370-400 502-542
Rear axle with Hendrickson air suspension 400–450 542–610
See air suspension U-bolt re-torquing and installation information below.
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 seat the cap flat
which is about 18 ft-lb (25 N•m) using a diagonal pattern. Use the same
diagonal pattern for each of the following U-bolt nut re-torque steps.
3. Tighten U-bolt nuts in increments of 74 ft-lb (100 N•m) until
tightened to final torque for the particular suspension.
DRIVESHAFT
Check the universal joints for any evidence of wear or looseness at the
regular lubrication interval. Stop the vehicle immediately, should
driveshaft vibrations occur, to avoid possible hazardous consequences or
damage to other components.
REAR AXLE LUBRICANT
Refer to theScheduled Maintenance Guidechapter for rear axle
lubricant level check/change intervals.
Your rear axle may be filled with an optional synthetic lubricant which
allows the use of extended service intervals. A tag on the filler plug
identifies the use of the synthetic lubricant.
Only use a lubricant that meets manufacturer specifications; refer to
Lubricant specificationsin this chapter.Use of a non-approved rear
axle lubricant may cause internal axle component damage.
Maintenance and Specifications
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A
Air conditioning ..........................47
manual heating and air
conditioning system .................47
Air suspension ...........................129
Antifreeze
(see Engine coolant) ................198
Anti-lock brake system
(see Brakes) ..............................127
Audio system (see Radio) ...34, 36
Automatic transmission ............132
fluid, adding ............................226
fluid, checking ........................226
fluid, refill capacities ..............261
fluid, specification ..................245
Auxiliary Input Jack ...................43
Auxiliary powerpoint ..................57
Axle ............................142, 183, 231
lubricant specifications ..........245
refill capacities ........................259
B
Battery .......................................195
charging system warning
light ............................................20
jumping a disabled battery ....162
voltage gauge ............................28
Belt-Minder...............................85
Booster seats ...............................99
Brakes ........................110, 115, 184
adjustment ..............................186
anti-lock ...................................127
anti-lock brake system (ABS)
warning light .....................20, 127
brake warning light ..................20
fluid, checking and adding ....224fluid, specifications .................245
parking ....................111, 118, 187
shift interlock ..........................131
Bulbs ............................................52
C
Cassette tape player ...................34
Catalytic converter
(see Emission control) .............187
Cell phone use ..............................6
Child safety seats ........................92
attaching with tether straps ....96
in front seat ..............................93
in rear seat ..........................93, 95
tether anchorage hardware .....96
Child safety seats -
booster seats ...............................99
Cleaning your vehicle
engine compartment ..............176
exterior ....................................179
instrument panel ....................178
interior .....................................179
plastic parts ............................177
safety belts ..............................179
washing ....................................175
waxing .....................................175
wheels ......................................176
wiper blades ............................177
Climate control (see Air
conditioning or Heating) ............47
Clock adjust
AM/FM/CD .................................43
Clutch ................................136, 225
adjusting ..................................225
fluid ..........................................225
operation while driving ..........137
specifications ..........................245
Index
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gauge .........................................28
improving fuel economy ........216
octane rating ...........207, 262–263
quality ......................................208
running out of fuel .........107, 209
safety information relating to
automotive fuels .....................204
Fuses ..................................153, 162
G
Gas mileage
(see Fuel economy) .................216
Gauges .........................................28
battery voltage gauge ...............28
engine coolant temperature
gauge .........................................28
engine oil pressure gauge ........28
fuel gauge ..................................28
odometer ...................................28
speedometer .............................28
tachometer ................................28
trip odometer ............................28
H
Hazard flashers .........................153
Headlamps ...................................50
aiming ........................................51
daytime running lights .............50
high beam .................................50
warning chime ..........................20
Heating
heating and air conditioning
system .......................................47
Hood ..........................................189
I
Ignition .......................103, 262–263
chime .........................................20Infant seats (see Safety seats) ..92
Instrument panel
cleaning ...................................178
lighting up panel and
interior .......................................51
J
Jump-starting your vehicle ......162
K
Keys
key in ignition chime ...............20
positions of the ignition .........103
L
Lamps
bulb replacement
specifications chart ..................52
cargo lamps ...............................51
daytime running light ...............50
headlamps .................................50
high beams ................................50
instrument panel, dimming .....51
interior lamps ...........................52
replacing bulbs ...................52–54
Lane change indicator
(see Turn signal) ........................51
Lights, warning and indicator ....20
air suspension ...........................20
anti-lock brakes (ABS) ....20, 127
brake ..........................................20
charging system ........................20
safety belt .................................20
service engine soon ..................20
traction control off ...................20
turn signal indicator .................20
Locks
childproof ..................................68
Index
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USA(fus)