
WARNING:To reduce the risk of personal injury or property
damage when manually releasing the spring brakes, be sure to
block the wheels so the vehicle cannot move once the brakes are
released.
Towing the vehicle with the front wheels suspended
When it is necessary to tow a vehicle with the front wheels suspended,
extra precautions must be taken to avoid transmission or differential
damage. Proceed as follows:
•Remove the axle shafts from the axle assembly to prevent the wheels
from driving the differential and the transmission.
•The wheel hub ends must be covered to prevent loss of axle lubricant
and entrance of other contaminants. If the axle shafts are not
removed, removal of the driveshaft is required.
Note:To avoid transmission damage, vehicles should not be towed even
a short distance without suspending rear wheels or removing the axle
shafts or driveshaft.
Note:In the event the chassis is equipped with a tandem axle and the
vehicle is to be towed from the front, the forward rear axle may be
raised to clear the road surface and secured to the frame by chains or
U-bolts, allowing only the rear rear axle to contact the road surface. Axle
shafts must be removed from the rear rear axle assembly. The wheel hub
ends must be covered to prevent loss of axle lubricant and entrance of
contaminants. Use extreme care in securing the chains or U-bolts to
avoid possible damage to the brake lines, hoses or other components.
Towing vehicles equipped with a driver-controlled differential lock
Note:If the vehicle must be towed to a service facility with the drive
axle wheels on the ground, it is necessary to remove the axle shafts
before the vehicle is towed.
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1. Shift collar in the locked position
2. Actuator assembly and shift fork
3. Axle shaft
4. Interference between the shift
collar and housing
5. Shift collar in the unlocked
position
6. Outer splines - axle shaft to collar
7. Shift collar and differential case
splines
8. Inner splines - axle shaft to side
gear
9. Side gear
10. Differential (plain) case half
Removing axle shafts before towing
1. Shift the main differential to the unlocked (disengaged) position. The
differential lock light will turn off.
2. Remove the capscrews and washers or stud nuts and washers from
flanges of both axle shafts.
3. Loosen the tapered dowels in the flanges of both axle shafts by
holding a 1
1 2inch diameter brass drift or hammer against the axle shaft
center and hitting it with a five or six pound hammer.Note:Do not use
a chisel or wedge to loosen the axle shafts and dowels. Use of a chisel or
wedge can damage the hub, axle shafts and oil seals.
4. Remove the tapered dowels and both axle shafts from the axle
assembly.
5. Assemble a cover over openings of both wheels ends to prevent loss of
lubricant and keep dirt away from the wheel bearing cavities.
Note:One of the axle shafts has two sets of splines. One set to engage
with the differential side gear and one set to engage with the shift collar
for the differential lock. It may be necessary to rotate the shaft slightly
to align the gear spline teeth with the shift collar teeth in order to
remove the axle shaft.
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Installing the axle shafts
1. Remove the covers from the wheel ends.
2. Shift the differential lock to the unlocked (disengaged) position.
3. Install the axle shafts.
•Place the gaskets on the wheel hub studs.
•Push the right-hand axle shaft and gasket into the wheel end and
housing until the shaft stops against the differential shift collar.
•Push down and in on the axle shaft flange and rotate the shaft until
the splines of the shaft and shift collar are engaged.
•Push the axle shaft further into the housing until the shaft stops
against the differential side gear.
•Push down on the axle shaft flange and rotate the shaft until the
splines of the shaft and side gear are engaged.
•Push the axle shaft completely into the housing until the axle shaft
flange and the gasket are flush against the wheel hub.
•Install the left-hand axle shaft and gasket into the wheel end.
4. If tapered dowels are required, install them at each stud and into the
flange of the axle shaft. Use a punch or drift and hammer, if needed.
5. Install the fasteners and tighten to correct torque value. Refer to the
Service Manual.
Towing the vehicle with the rear wheels suspended
Note:To avoid damage to the cab roof or air deflector when towing the
vehicle backward (rear wheels suspended) the air deflector must be
removed.
Whenever possible, it is preferable to tow a disabled vehicle from the
rear by raising the rear of the chassis. When towing a vehicle with the
rear of the chassis suspended, the front wheels must be locked in the
straight-ahead position.
Vehicles equipped with a manual transmission must have at least 1.0 pint
(0.5L) of transmission fluid drained from the case. This will prevent the
transmission fluid from entering the clutch housing and fluid saturating
the clutch discs. Make sure that the transmission fluid is replaced before
the vehicle is returned to service.
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P
Parking brake ....................112, 119
warning light .............................23
Power door locks ........................67
Power mirrors .............................60
Power point .................................57
Power steering ..........................190
fluid, checking and adding ....214
fluid, refill capacity ................251
fluid, specifications .................237
Power Take-Off (PTO)
operation .................................141
Power Windows ...........................58
R
Radio ......................................36, 38
Relays ........................................154
Remote entry system
locking/unlocking doors ...........67
Roadside assistance ..................153
S
Safety belts (see Safety
restraints) ........................80–81, 83
Safety defects, reporting ..........174
Safety restraints ....................80–83
Belt-Minder.............................84
cleaning the safety belts ........102
extension assembly ..................84
for adults .............................81, 83
for children ...............................88
lap belt ......................................82
warning light and chime ....23, 84
Safety seats for children ............92Scheduled Maintenance
Guide .........................................254
General Maintenance
Information .............................254
Seat belts (see Safety
restraints) ....................................80
Seats ............................................69
child safety seats ......................92
cleaning ...................................180
heated ........................................76
Setting the clock
AM/FM/CD .................................45
Special notice ................................5
Specification chart,
lubricants ...................................237
Speed control ..............................64
Speedometer ...............................31
Starting your vehicle ................104
jump starting ..........................162
preparing to start your
vehicle .....................................104
Steering .....................................189
Steering wheel
controls ......................................57
tilting .........................................57
Suspension ........................132, 221
T
Tachometer .................................31
Tires ...........................................229
Towing
wrecker ....................................166
Traction control
off light ......................................23
Transmission .....................134, 138
automatic operation ...............134
Index
289
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USA(fus)

fluid, checking and adding
(automatic) .............................218
fluid, checking and adding
(manual) .................................219
fluid, refill capacities ..............252
lubricant specifications ..........237
manual operation ....................138
Turn signal ..................................52
U
Upfitter controls .........................66
UREA .........................................201
V
Vehicle loading ..................147–148
Voltmeter (see Battery voltage
gauge) ..........................................31W
Warning chimes ...........................23
Warning lights (see Lights)
.......23
Washer fluid
..............................192
Water, Driving through
.............109
Wheels
.......................................224
Windows
power
.........................................58
Windshield washer fluid and
wipers
..........................................56
checking and adding fluid
.....192
operation
...................................56
replacing wiper blades
...........193
Wrecker towing
.........................166
Index
290
2011 F-650/750(f67)
Supplement, 2nd Printing
USA(fus)