Ford F-53 Motorhome Chassis (2017 year). Manual — part 31

E175447

3. Block the diagonally opposite wheel.

The parking brake is on the
transmission. Therefore, the vehicle will
not be prevented from moving when a
rear wheel is lifted, even if the parking
brake is applied. Be sure to block both
directions of the wheel that is
diagonally opposite to the wheel that
is being lifted.

4. Remove the spare tire and jack from

the storage location.

5. Loosen the wheel nut by pulling up on

the handle of the lug nut wrench about
one-half turn (counterclockwise). Do
not remove the wheel lug nuts until you
raise the tire off the ground.

6. Position the jack to raise the front or

rear wheel. Raise the vehicle with the
jack applied to the axle(s).

Note: Never use the rear differential as a
jacking point.

7.

Raise the vehicle until the wheel is
completely off the ground.

8. Remove the lug nuts with the lug nut

wrench.

9. Replace the flat tire with the spare tire.

E161440

10.

Use the lug nut wrench to screw the
lug nut snugly against the wheel.

11.

Lower the vehicle.

12.

Remove the jack and fully tighten the
lug nuts in the order shown. See
Technical Specifications (page
124).

E161441

1

3

4

2

7

6

5

8

8-lug nut wheel

1

2

3

4

5

6

7

8

9

10

E169375

10-lug nut wheel

13. Replace any wheel trim.

14. Stow the jack, handle and lug wrench.

15. Unblock the wheels.

TECHNICAL SPECIFICATIONS

Wheel Lug Nut Torque Specifications

WARNING

When a wheel is installed, always remove any corrosion, dirt or foreign materials
present on the mounting surfaces of the wheel or the surface of the wheel hub,
brake drum or brake disc that contacts the wheel. Make sure that any fasteners

that attach the rotor to the hub are secured so they do not interfere with the mounting
surfaces of the wheel. Installing wheels without correct metal-to-metal contact at the
wheel mounting surfaces can cause the wheel nuts to loosen and the wheel to come off
while the vehicle is in motion, resulting in loss of control.

Ib-ft (Nm)

*

Bolt size

150 (200)

M14 x 1.5

(19.5 inch wheels)

450 (610)

M22 x 1.5

(22.5 inch wheels)

*

Torque specifications are for nut and bolt threads free of dirt and rust. Use only Ford

recommended replacement fasteners.

On vehicles equipped with dual rear wheels, retighten the wheel lug nuts to the specified
torque at 100 miles (160 kilometers), and again at 500 miles (800 kilometers) of new
vehicle operation and after any wheel disturbance (such as tire rotation, changing a flat
tire, wheel removal).

On all two-piece flat wheel nuts, apply one drop of motor oil between the flat washer
and the nut. Do not apply motor oil to the wheel nut threads or the wheel stud threads.

E161443

ENGINE SPECIFICATIONS

6.8L Engine

Engine

415 in³ (6,800 cm³)

Displacement

1-6-5-10-2-7-3-8-4-9

Firing order

Coil on plug

Ignition system

0.039 in (1 mm) - 0.043 in (1.1 mm)

Spark plug gap

9.2:1

Compression ratio

Drivebelt Routing

Engines with Air Conditioning

E161788

Engines without Air Conditioning

E161789

MOTORCRAFT PARTS

Motorcraft Part number

Component

FA-1782

Air filter element

BXT-65-750

Battery (F-53 stripped chassis and F-59

step van ramp prep package)

BXT-31-XT

Battery (F-59 step van)

FL-820-S

Oil filter

Motorcraft Part number

Component

SP-509

Spark plugs

FT-187

Transmission fluid filter

We recommend Motorcraft replacement parts available at your Ford dealer or at
fordparts.com for scheduled maintenance. These parts meet or exceed Ford Motor
Company’s specifications and are engineered for your vehicle. Use of other parts may
impact vehicle performance, emissions and durability. Your warranty may be void for any
damage related to use of other parts.

If a Motorcraft oil filter is not available, use an oil filter that meets industry performance
specification SAE/USCAR-36.

For spark plug replacement, contact an authorized dealer. Replace the spark plugs at the
appropriate intervals. See Scheduled Maintenance (page 136).