1999 FORD F SERIES MOTORHOME AND COMMERCIAL CHASSIS tire size

VEHICLE LOADING
Your vehicle’s load capacity is designed by weight, not volume, so you
cannot necessarily use all available space with large or heavy loads.
Maximum safe vehicle weights as well as tire, rim sizes and inflation
pressures are specified for your vehicle on the Safety Compliance
Certification Label. A Safety Compliance Certification Label was supplied
by Ford Motor Company to the Motorhome Manufacturer. The
manufacturer uses this information and supplies a Compliance
Certification Label which is located inside the vehicle to the left of the
driver.
Before loading a vehicle, familiarize yourself with the following terms:
•Base Curb Weight: Weight of the vehicle including any standard
equipment, fluids, lubricants, etc. It does not include passengers or
aftermarket equipment.
•Payload: Combined maximum allowable weight of cargo, passengers
and optional equipment. The payload equals the gross vehicle weight
rating minus base curb weight.
•GVW (Gross Vehicle Weight): Base curb weight plus payload
weight. The GVW is not a limit or a specification.
•GVWR (Gross Vehicle Weight Rating): Maximum total weight of
the base vehicle, passengers, optional equipment and cargo. The
GVWR is specific to each vehicle and is listed on the Safety
Compliance Label on the driver’s door pillar.
•GAWR (Gross Axle Weight Rating): Carrying capacity for each axle
system. The GAWR is specific to each vehicle and is listed on the
Safety Compliance Label on the driver’s door pillar.
•GCWR (Gross Combined Weight Rating): Maximum combined
weight of towing vehicle (including passengers and cargo) and the
trailer. The GCWR indicates the maximum loaded weight that the
vehicle is allowed to tow.
•Maximum Trailer Weight Rating: Maximum weight of a trailer the
vehicle is permitted to tow. The maximum trailer weight rating is
determined by subtracting the vehicle curb weight for each
engine/transmission combination, any required option weight for trailer
towing and the weight of the driver from the GCWR for the towing
vehicle.
Driving
32

Never use wheels or lug
nuts different than the
original equipment as this could
damage the wheel or mounting
system. This damage could allow
the wheels to come off while the
vehicle is being driven.
15. Replace any wheel trim.
16. Stow the jack, handle and lug wrench.
17. Unblock the wheels.
On vehicles equipped with dual rear wheels, retighten the wheel lug nuts
to the specified torque at 160 km (100 miles), and again at 800 km (500
miles) of new vehicle operation and after any wheel disturbance (tire
rotation, changing a flat tire, wheel removal, etc.).
Bolt size Wheel lug nut torque*
Nm Lb-ft
M14 x 1.5 200-225 150-165
* Torque specifications are for nut and bolt threads free of dirt and rust. Use
only Ford recommended replacement fasteners.
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.
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 front disc brake hub and rotor that contacts 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.
JUMP STARTING YOUR VEHICLE
The gases around the battery can explode if exposed to flames,
sparks, or lit cigarettes. An explosion could result in injury or
vehicle damage.
1
3 4
27 6
5 8
Roadside emergencies
48

Tire rotation
Because your vehicle’s tires perform different jobs, they often wear
differently. To make sure your tires wear evenly and last longer, rotate
them as indicated in the Scheduled Maintenance Guide. If you notice
that the tires wear unevenly, have them checked.
Replacing the tires
Replace the tires when the wear
band is visible through the tire
treads.
Failure to follow these precautions may adversely affect the
handling of the vehicle and make it easier for the driver to lose
control and roll over.
Tires that are larger or smaller than your vehicle’s original tires may also
affect the accuracy of your speedometer.
The tires on your vehicle have been match mounted to the original
equipment wheels. Replacement tires should be mounted so that the
match mount mark on the tire aligns with the small dimple in the face of
the wheel rim.
SNOW TIRES AND CHAINS
Snow tires must be the same size and grade as the tires you
currently have on your vehicle.
The tires on your vehicle have all weather treads to provide traction in
rain and snow. However, in some climates, you may need to use snow
tires and chains. If you need to use chains, it is recommended that steel
wheels (of the same size and specifications) be used as chains may chip
aluminum wheels.
Maintenance and care
70

•Using the air conditioner or defroster may reduce fuel economy.
•Using speed control (if equipped) may improve fuel economy. Speed
control can help maintain a constant speed and reduce speed changes.
You may want to turn off the speed control in hilly terrain as
unnecessary shifting between third and fourth gears may occur and
could result in reduced fuel economy.
•Warming up a vehicle on cold mornings is not required and may
reduce fuel economy.
•Resting your foot on the brake pedal while driving may reduce fuel
economy.
•Combine errands and minimize stop-and-go driving.
Maintenance
•Keep tires properly inflated and use only recommended size.
•Operating a vehicle with the wheels out of alignment will reduce fuel
economy.
•Use recommended engine oil. Refer toLubricant Specifications.
•Perform all regularly scheduled maintenance items. Follow the
recommended maintenance schedule and owner maintenance checks
found in your vehicle Scheduled Maintenance Guide.
Conditions
•Heavily loading a vehicle or towing a trailer may reduce fuel economy
at any speed.
•Carrying unnecessary weight may reduce fuel economy (approximately
2 km/h [1 mpg] is lost for every 180 kg [400 lb] of weight carried).
•Adding certain accessories to your vehicle (for example bug
deflectors, rollover/light bars, running boards, ski/luggage racks) may
reduce fuel economy.
•Using fuel blended with alcohol may lower fuel economy.
•Fuel economy may decrease with lower temperatures during the first
12–16 km (8–10 miles) of driving.
•Driving on flat terrain offers improved fuel economy as compared to
driving on hilly terrain.
•Transmissions give their best fuel economy when operated in the top
cruise gear and with steady pressure on the gas pedal.
•Close windows for high speed driving.
Maintenance and care
82

FILLING STATION INFORMATION
Fuel information Unleaded only - 87 octane
Fuel tank capacity 284.0L (75 gallons)
Engine oil (includes filter change) 5.7L (6.0 quarts). Use Motorcraft
5W30 Super Premium Motor Oil,
Ford specification WSS-M2C153-G.
Tire size and pressure Refer to the Certification Label.
Power steering fluid capacity Keep in FULL range on dipstick.
Use Motorcraft MERCONAT F.
Automatic transmission fluid
capacity-4R100
116.8L (17.7 quarts). Use
Motorcraft MERCONAT F.
1Ensure the correct automatic transmission fluid is used. Transmission
fluid requirements are indicated on the dipstick or on the dipstick
handle. MERCONand MERCONV are not interchangeable. DO NOT
mix MERCONand MERCONV. Refer to your Scheduled Maintenance
Guide to determine the correct service interval.
Filling station information
96