F-250 Light Duty (1999 year). Manual — part 39

5. Loosen each wheel lug nut
one-half turn counterclockwise but
do not remove them until the wheel
is raised off the ground.

When one of the rear
wheels is off the ground,

the transmission alone will not
prevent the vehicle from moving
or slipping off the jack, even if the
transmission is in P (Park)
(automatic transmission) or R
(Reverse) (manual transmission).
To prevent the vehicle from
moving when you change the tire,
be sure that the parking brake is
set and the diagonally opposite
wheel is blocked.

If the vehicle slips off the jack, you or someone else could be
seriously injured.

The following steps apply to F250/F350 only:

6. Insert the hooked end of the jack
handle into the jack and use the
handle to slide the jack under the
vehicle.

7. Position the jack according to the
following guides:

Roadside emergencies

156

• Front (4x2)

• Front passenger side (4x4)

Roadside emergencies

157

• Front driver side (4x4)

Make sure the jack fits into the
notched area on the differential
housing.

• Rear

Roadside emergencies

158

8. Turn the jack handle clockwise
until the wheel is completely off the
ground and high enough to install
the spare tire.

9. Remove the lug nuts with the lug
wrench.

10. On single rear wheel vehicles,
replace the flat tire with the spare
tire, making sure the valve stem is
facing outward for all front tires and
vehicles equipped with single rear
wheels. If replacing an inboard rear
tire on a dual rear wheel vehicle,
the valve stem must be facing outward. If replacing the outboard wheel,
the valve stem must be facing inward. Reinstall the lug nuts until the
wheel is snug against the hub. Do not fully tighten the lug nuts until the
wheel has been lowered.

11. Lower the wheel by turning the jack handle counterclockwise.

Go to step 19.

The following steps apply to F450/F550 only:

12. Slide the notched end of the
jack handle over the release valve
and use the handle to slide the jack
under the vehicle. Make sure the
valve is closed by turning it
clockwise.

13. Position the jack according to
the following guides:

Roadside emergencies

159