2014 FORD F SERIES MOTORHOME AND COMMERCIAL CHASSIS height

ESSENTIAL TOWING CHECKS
Follow these guidelines for safe towing:
•Do not tow a trailer until you drive yourvehicle at least 1000 mi (1,600 km).
•Consult your local motor vehicle lawsfor towing a trailer.
•See the instructions included withtowing accessories for the properinstallation and adjustmentspecifications.
•Service your vehicle more frequently ifyou tow a trailer. See your scheduledmaintenance information.
•If you use a rental trailer, follow theinstructions the rental agency givesyou.
Another chapter of this manual containsload specification terms found on the tirelabel and Safety Compliance label andinstructions on calculating your vehicle'sload. See Load Limit (page 36).
Remember to account for the trailertongue weight as part of your vehicle loadwhen calculating the total vehicle weight.
Hitches
Do not use a hitch that either clamps ontothe bumper or attaches to the axle.
Distribute the trailer load so 10-15% of thetotal trailer weight is on the tongue.
Weight-Distributing Hitches
WARNING
Do not adjust a weight-distributinghitch to any position where the rearbumper of the vehicle is higher thanit was before attaching the trailer. Doingso will defeat the function of theweight-distributing hitch, which may causeunpredictable handling, and could resultin serious personal injury.
When hooking-up a trailer using aweight-distributing hitch, always use thefollowing procedure:
1.Park the loaded vehicle, without thetrailer, on a level surface.
2.Measure the height to the top of yourvehicle’s front wheel opening on thefender. This is H1.
3.Securely attach the loaded trailer toyour vehicle without theweight-distributing bars connected.
4.Measure the height to the top of yourvehicle’s front wheel opening on thefender a second time. This is H2.
5.Install and adjust the tension in theweight-distributing bars so that theheight of your vehicle’s front wheelopening on the fender is approximatelyhalfway between H1 and H2.
6.Check that the trailer is level or slightlynose down toward your vehicle. If not,adjust the ball height accordingly andrepeat Steps 1-6.
7.Lock the bar tension adjuster in place.
8.Check that the trailer tongue securelyattaches and locks onto the hitch.
9.Install safety chains, lighting and trailerbrake controls as required by law or thetrailer manufacturer.
Safety Chains
Note:Never attach safety chains to thebumper.
Always connect the safety chains to thehook retainers of your vehicle hitch.
To connect the safety chains, cross themunder the trailer tongue and allow enoughslack for turning tight corners. Do not allowthe chains to drag on the ground.
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A.P: Indicates a tire, designatedby the Tire and Rim Association,that may be used for service oncars, sport utility vehicles,minivans and light trucks.Note: Ifyour tire size does not begin witha letter this may mean it isdesignated by either the EuropeanTire and Rim TechnicalOrganization or the Japan TireManufacturing Association.
B.215: Indicates the nominalwidth of the tire in millimetersfrom sidewall edge to sidewalledge. In general, the larger thenumber, the wider the tire.
C.65: Indicates the aspect ratiowhich gives the tire's ratio ofheight to width.
D.R: Indicates a radial type tire.
E.15: Indicates the wheel or rimdiameter in inches. If you changeyour wheel size, you will have topurchase new tires to match thenew wheel diameter.
F.95: Indicates the tire's loadindex. It is an index that relates tohow much weight a tire can carry.You may find this information inyour owner’s manual. If not,contact a local tire dealer.
Note:You may not find thisinformation on all tires because itis not required by federal law.
G.H: Indicates the tire's speedrating. The speed rating denotesthe speed at which a tire isdesigned to be driven for extendedperiods of time under a standardcondition of load and inflationpressure. The tires on your vehiclemay operate at differentconditions for load and inflationpressure. These speed ratings mayneed to be adjusted for thedifference in conditions. Theratings range from 81 mph (130km/h) to 186 mph (299 km/h).These ratings are listed in thefollowing chart.
Note:You may not find thisinformation on all tires because itis not required by federal law.
Speed rating - mph(km/h)Letterrating
81 (130)M
87 (140)N
99 (159)Q
106 (171)R
112 (180)S
118 (190)T
124 (200)U
130 (210)H
149 (240)V
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D.Maximum Load Single lb(kg) at psi (kPa) cold: Indicatesthe maximum load and tirepressure when the tire is used asa single; defined as two tires(total) on the rear axle.
Information on T Type Tires
T145/80D16 is an example of atire size.
Note:The temporary tire size foryour vehicle may be different fromthis example. Tire Quality Gradesdo not apply to this type of tire.
T type tires have some additionalinformation beyond those of P
type tires; these differences aredescribed below:
A.T: Indicates a type of tire,designated by the Tire and RimAssociation, that is intended fortemporary service on cars, sportutility vehicles, minivans and lighttrucks.
B.145: Indicates the nominalwidth of the tire in millimetersfrom sidewall edge to sidewalledge. In general, the larger thenumber, the wider the tire.
C.80: Indicates the aspect ratiowhich gives the tire's ratio ofheight to width. Numbers of 70 orlower indicate a short sidewall.
D.D: Indicates a diagonal type tire.
R: Indicates a radial type tire.
E.16: Indicates the wheel or rimdiameter in inches. If you changeyour wheel size, you will have topurchase new tires to match thenew wheel diameter.
Inflating Your Tires
Safe operation of your vehiclerequires that your tires areproperly inflated. Remember thata tire can lose up to half of its airpressure without appearing flat.
Every day before you drive, checkyour tires. If one looks lower thanthe others, use a tire gauge tocheck pressure of all tires andadjust if required.
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Tire Wear
When the tread is worn down toone sixteenth of an inch (2millimeters), tires must bereplaced to help prevent yourvehicle from skidding andhydroplaning. Built-in treadwearindicators, or wear bars, whichlook like narrow strips of smoothrubber across the tread willappear on the tire when the treadis worn down to one sixteenth ofan inch (2 millimeters).
When the tire tread wears downto the same height as these wearbars, the tire is worn out and mustbe replaced.
Damage
Periodically inspect the tire treadsand sidewalls for damage (suchas bulges in the tread or sidewalls,cracks in the tread groove andseparation in the tread orsidewall). If damage is observed
or suspected have the tireinspected by a tire professional.Tires can be damaged duringoff-road use, so inspection afteroff-road use is alsorecommended.
Age
WARNING
Tires degrade over timedepending on many factorssuch as weather, storageconditions, and conditions of use(load, speed, inflation pressure)the tires experience throughouttheir lives.
In general, tires should bereplaced after six years regardlessof tread wear. However, heat
caused by hot climates orfrequent high loading conditionscan accelerate the aging processand may require tires to bereplaced more frequently.
You should replace your spare tirewhen you replace the road tires orafter six years due to aging even ifit has not been used.
U.S. DOT Tire IdentificationNumber
Both United States and CanadaFederal regulations require tiremanufacturers to placestandardized information on thesidewall of all tires. Thisinformation identifies and
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