Follow your community’s regulations andstandards for recycling and disposing ofautomotive fluids.
Severe Climates
If you drive in extremely cold climates:
•It may be necessary to increase thecoolant concentration above 50%.
•A coolant concentration of 60%provides improved freeze pointprotection.Coolant concentrationsabove 60% decrease the overheatprotection characteristics of thecoolant and may cause enginedamage.
If you drive in extremely hot climates:
•You can decrease the coolantconcentration to 40%.
•Coolant concentrations below 40%decrease the freeze and corrosionprotection characteristics of thecoolant and may cause enginedamage.
Vehicles driven year-round in non-extremeclimates should use prediluted enginecoolant for optimum cooling system andengine protection.
Coolant Change
At specific mileage intervals, as listed inthe scheduled maintenance information,the coolant should be changed. Theinstrument cluster display may display amessage to change coolant at this time.Add prediluted coolant approved to thecorrect specification. See Capacities andSpecifications (page 291).
Engine-driven Cooling Fan (FanClutch)
Your vehicle may have an engine drivencooling fan drive (also called a fan clutch).This fan drive changes the fan speed tomatch the vehicle’s changing cooling airflow requirements. Fan speed, fan noiselevel and fuel consumption all increasebased on the driving conditions thatinclude trailer towing, hill climbing, heavyloads, high speed and high ambienttemperature, individually or in combination.
The fan drive is designed to provide theminimum fan speed (and resultingminimum fan noise and fuel consumption)required to meet the ever changing vehiclecooling air flow requirements. You can hearfan noise increasing and decreasing as theengine power requirements and vehicledriving conditions change as you drive. Thisis to be expected as being normal to theoperation of your vehicle. High levels of fannoise might also be heard when yourengine is first started, and should normallydecrease after driving for a short time.
ENGINE COOLANT CHECK -
7.3L
WARNING: Do not remove thecoolant reservoir cap when the engine ison or the cooling system is hot. Wait 10minutes for the cooling system to cooldown. Cover the coolant reservoir capwith a thick cloth to prevent thepossibility of scalding and slowly removethe cap. Failure to follow this instructioncould result in personal injury.
WARNING: Do not put coolant inthe windshield washer reservoir. Ifsprayed on the windshield, coolant couldmake it difficult to see through thewindshield.
238
2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingMaintenance
Dispose of used engine coolant in anappropriate manner. Follow yourcommunity’s regulations and standardsfor recycling and disposing of automotivefluids.
Severe Climates
If you drive in extremely cold climates:
•It may be necessary to increase thecoolant concentration above 50%.
•A coolant concentration of 60%provides improved freeze pointprotection. Coolant concentrationsabove 60% decrease the overheatprotection characteristics of thecoolant and may cause enginedamage.
If you drive in extremely hot climates:
•You can decrease the coolantconcentration to 40%.
•Coolant concentrations below 40%decrease the freeze and corrosionprotection characteristics of thecoolant and may cause enginedamage.
Vehicles driven year-round in non-extremeclimates should use prediluted enginecoolant for optimum cooling system andengine protection.
Coolant Change
Change the coolant at specific mileageintervals as listed in the scheduledmaintenance information. The informationdisplay may display a message to changecoolant at this time. Add predilutedcoolant approved to the correctspecification. See Capacities andSpecifications (page 291).
Engine-driven Cooling Fan (FanClutch)
Your vehicle comes with an engine drivencooling fan drive, also called a fan clutch.This fan drive changes the fan speed tomatch the vehicle’s changing cooling airflow requirements. Fan speed, fan noiselevel and fuel consumption all will increasebased on the driving conditions thatinclude trailer towing, hill climbing, heavyloads, high speed and high ambienttemperature, individually or in combination.
The fan drive is designed to provide theminimum fan speed, and resultingminimum fan noise and fuel consumptionrequired to meet the ever changing vehiclecooling air flow requirements. You will hearthe amount of fan noise increasing anddecreasing as the engine powerrequirements and vehicle driving conditionschange as you drive. This is to be expectedas being normal to the operation of yourvehicle. High levels of fan noise might alsobe heard when your engine is first started,and should normally decrease after drivingfor a short time.
Fail-Safe Cooling
Fail-safe cooling allows you to temporarilydrive your vehicle before any incrementalcomponent damage occurs. The fail-safedistance depends on ambienttemperature, vehicle load and terrain.
How Fail-Safe Cooling Works
If the engine begins to overheat, thecoolant temperature gauge moves towardthe red zone:
A warning lamp illuminates anda message may appear in theinformation display.
241
2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingMaintenanceE103308 E67028
If the engine reaches a presetover-temperature condition, the engineswitches to alternating cylinder operation.Each disabled cylinder acts as an air pumpand cools the engine.
When this occurs, your vehicle stilloperates, however:
•Engine power is limited.
•The air conditioning system turns off.
Continued operation increases the enginetemperature, causing the engine tocompletely shut down. Your steering andbraking effort increases in this situation.
When the engine temperature cools, youcan re-start the engine. Have your vehiclechecked as soon as possible to minimizeengine damage.
When Fail-Safe Mode Is Activated
WARNING: Fail-safe mode is foruse during emergencies only. Operateyour vehicle in fail-safe mode only aslong as necessary to bring your vehicleto rest in a safe location and seekimmediate repairs. When in fail-safemode, your vehicle will have limitedpower, will not be able to maintainhigh-speed operation, and maycompletely shut down without warning,potentially losing engine power, powersteering assist, and power brake assist,which may increase the possibility of acrash resulting in serious injury.
WARNING: Do not remove thecoolant reservoir cap when the engine ison or the cooling system is hot. Wait 10minutes for the cooling system to cooldown. Cover the coolant reservoir capwith a thick cloth to prevent thepossibility of scalding and slowly removethe cap. Failure to follow this instructioncould result in personal injury.
Your vehicle has limited engine powerwhen in the fail-safe mode, drive yourvehicle with caution. Your vehicle does notmaintain high-speed operation and theengine may operate poorly.
Remember that the engine is capable ofshutting down to prevent engine damage.In this situation:
1.Pull off the road as soon as safelypossible and switch the engine off.
2.If you are a member of a roadsideassistance program, we recommendthat you contact your roadsideassistance service provider.
3.If this is not possible, wait a shortperiod for the engine to cool.
4.Check the coolant level. If the coolantlevel is at or below the minimum mark,add prediluted coolant immediately.
5.When the engine temperature cools,you can re-start the engine. Have yourvehicle checked as soon as possible tominimize engine damage.
Note: Driving your vehicle without repairincreases the chance of engine damage.
Engine Coolant TemperatureManagement (If Equipped)
WARNING: To reduce the risk ofcrash and injury, be prepared that thevehicle speed may reduce and thevehicle may not be able to acceleratewith full power until the coolanttemperature reduces.
If you tow a trailer with your vehicle, theengine may temporarily reach a highertemperature during severe operatingconditions, for example ascending a longor steep grade in high ambienttemperatures.
242
2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingMaintenance
as a stroke indicator to aid inadjustment checks. If the push rod isclean and the brakes are out ofadjustment, you can see the orangemarker protruding from the chamberwhen the brakes are applied.
•Checking the brake lining (every serviceinterval). When brake linings or blockswear within 0.063 in (1.6 mm) theymust be replaced.
•Periodic checking (every serviceinterval) of the air compressor filter.Check the filter minder and when theindicator is near or on the red linemarked Service, replace the filter andreset the service filter minder.
Do not back off or disconnect the frontbrakes so that they are less effective,letting the rear brakes do all the stoppingof your vehicle. Do not overlook the brakeson the trailer either. Brake condition on thetrailer is just as important as the tractor.Proper brake balance on trucks andtractor-trailers is essential for effectivebraking.
Once a year, inspect the entire brakesystem:
•Rubber components for deterioration.A qualified technician should inspectthese components and replace themas necessary. Replacement intervalsvary according to the severity andlength of vehicle service.
•Condition of brake drums, brakechambers and slack adjusters.
•System for air leaks.
•Hose or pipes for rust, damage anddeterioration.
•Operation of service and parkingbrakes.
Periodically inspect parts such as air brakechamber diaphragm, air compressor andair cleaner. Replace any parts if you canconsider them unserviceable.
Air Dryer
Climactic conditions affect performanceof desiccant or after-cooler type air dryers.You must establish a maintenanceschedule for each specific operation.
The use of an air dryer on a vehicle doesnot eliminate the need to drain the airreservoirs periodically.
Inspect for moisture in the air system byopening reservoirs, draincocks or valvesand checking for presence of water. Thepresence of small amounts of water dueto condensation is normal and is not anindication that the dryer is not functioningproperly.
Replace or rebuild the desiccant cartridgewhen you determine that the desiccant iscontaminated and does not have adequatewater absorption capacity. The desiccantchange interval may vary. A generalrecommendation is to replace thedesiccant every 12 months (yearly). Ifexperience has shown that extended orshortened life has resulted for a particularinstallation, then the yearly interval can beincreased or decreased accordingly.
Draining the Air Brake Reservoir
WARNING: Failure to drain airbrake reservoirs can result in a reductionor loss of braking ability due to fluidaccumulation in the reservoir and/orpossible freeze-up during cold weather.
Completely drain all the air brake reservoirsdaily by opening the draincock at the endsof the tanks. (Where accessible.Pull-chains are used when the drains areundercab or otherwise inaccessible.) Closethe draincock after draining. Manually drain
257
2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingMaintenance
Towing a Trailer
Inspect and lubricate the U-joints.Inspect frequently, serviceas requiredSee axle maintenance items under Exceptions.
Inspect the wheels and related components for abnormalnoise, wear, looseness or drag.Every 5,000 mi (8,000 km)
Change the engine oil and filter.Every 5,000 mi (8,000 km)or six monthsInspect and lubricate U-joints.
Rotate the tires 1and inspect them for wear, and measurethe tread depth.
Every 7,500 mi (12,000 km)
Replace the spark plugs.Every 60,000 mi(96,000 km)Replace the spark plug wires.
1Rotate the front wheels on vehicles with dual rear wheels when specified. Only rotatethe rear wheels if you notice unusual wear.
Extensive Idling or Low-speed Driving for Long Distances, as in Heavy Commercial Use(Such as Delivery, Taxi, Patrol Car or Livery)Short Trips that do not allow the engine to get to operating temperature causing fueldilution and an increase of the engine oil level
Replace engine air filter.Inspect frequently, serviceas required
Inspect the brake system.Every 5,000 mi (8,000 km)
Inspect the wheels and related components for abnormalnoise, wear, looseness or drag.
Lubricate the control arm and steering ball joints ifequipped with grease fittings.
Inspect and lubricate U-joints.Every 5,000 mi (8,000 km)or six months
Change the engine oil and filter.Every 5,000 mi (8,000 km),six months or 200 enginehours
336
2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingScheduled Maintenance
Off-road Operation
Inspect the wheels and related components for abnormalnoise, wear, looseness or drag.
Rotate the tires1 and inspect them for wear, and measurethe tread depth.
Every 7,500 mi (12,000 km)
1Rotate the front wheels on vehicles with dual rear wheels when specified. Only rotatethe rear wheels if you notice unusual wear.
Diesel Engine
If you operate your vehicle primarily in anyof the following conditions, you need toperform extra maintenance as indicated.If you operate your vehicle occasionallyunder any of these conditions, it is notnecessary to perform the extramaintenance. For specificrecommendations, see your dealershipservice advisor or technician.
Towing a Trailer or Using a Car-top Carrier
Change the engine oil and filter as indicated by the instru-ment cluster display, and perform the services listed in thescheduled maintenance chart.
As required
See the axle maintenance items under Exceptions.
Replace the engine-mounted and frame-mounted fuelfilters.Every 15,000 mi(24,000 km) or six months,600 engine hours
Flush and refill the coolant.At 60,000 mi (96,000 km)or 2400 engine hours
Note:After the initial coolant flush and fill at 60,000 mi (96,000 km) or 2400 enginehours, flush and fill every 45,000 mi (72,000 km) or 1800 engine hours thereafter.
338
2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingScheduled Maintenance
Rear Axle Maintenance
A rear axle fluid change or level check isnot required unless you suspect a leak orthe assembly has been submerged inwater. During long periods of trailer towingwith outside temperatures above 70°F(21°C), and at wide-open throttle for longperiods above 45 mph (72 km/h), changethe rear axle fluid every 24,000 mi(38,000 km) or three months, whichevercomes first.
California Fuel Filter Replacement
If you register your vehicle in California, theCalifornia Air Resources Board hasdetermined that the failure to perform thismaintenance item does not nullify theemission warranty or limit recall liabilitybefore the completion of your vehicle'suseful life. We, however, urge you to haveall recommended maintenance servicesperformed at the specified intervals andto record all vehicle service.
Hot Climate Oil Change Intervals
The normal oil change interval is 3,000 mi(5,000 km) for gasoline vehicles operatingin the Middle East, North Africa,Sub-Saharan Africa or locations withsimilar climates using American PetroleumInstitute (API) oils Certified for GasolineEngines and displaying the API CertificationMark. If API Certified Oils are not available,then it is acceptable to use API SM or SNoils. If API oils are not available, then theoil change interval is 1,750 mi (3,000 km).
Engine Air Filter Replacement
The life of the engine air filter is dependenton exposure to dusty and dirty conditions.Vehicles operated in these conditionsrequire frequent inspection andreplacement of the engine air filter andcabin air filter.
Diesel Particulate Filter
Over time, a slight amount of ash buildsup in the diesel particulate filter, which isnot removed during the regenerationprocess. The filter may need to be replacedwith a new or remanufactured part atapproximately 250,000 mi (400,000 km).Actual mileage varies depending on engineand vehicle operating conditions.
In this case, the engine control system setsa service light (wrench icon) to inform youto bring your vehicle to the dealer forservice. If there are any issues with theoxidation catalyst or particulate filtersystem, a service light (wrench or engineicon) sets by the engine control system toinform you to bring your vehicle into adealer for service.
344
2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingScheduled Maintenance
T
Technical SpecificationsSee: Capacities and Specifications.............291The Better Business Bureau (BBB) AutoLine Program (U.S. Only).......................198Tire Care..........................................................269TiresSee: Wheels and Tires.....................................269Towing a Trailer..............................................181Towing Points................................................193Towing...............................................................181Traction Control.............................................151Principle of Operation........................................151Trailer Brakes..................................................147Transmission..................................................130Transporting the Vehicle............................192
U
Under Hood Overview - 6.7LDiesel.............................................................225Under Hood Overview - 7.3L....................226USB Ports.........................................................98USB Port.........................................................320Using Adaptive Cruise Control................159Using Snow Chains.....................................287Using Stability Control................................155Using Traction Control - Vehicles With:Air Brakes.......................................................151Using Traction Control - Vehicles With:Hydraulic Brakes.........................................151Using Voice Recognition...........................320
V
Vehicle Care...................................................262General Information.........................................262Vehicle Identification Number.................313Locating the Vehicle IdentificationNumber..............................................................313Vehicle Identification NumberOverview...........................................................313Vehicle Identification...................................313Vehicle Identification Number.......................313Vehicle Inspection Guide...........................213Vehicle Inspection Information...............213Vehicle Storage.............................................267
VentilationSee: Climate Control..........................................86
W
Warning Lamps and Indicators.................67Warranty Information................................349Washer Fluid Check....................................249Washer Fluid Specification.....................306WashersSee: Cleaning the Exterior..............................263See: Wipers and Washers.................................54Waxing.............................................................264What Is Cruise Control...............................158What Is the Pneumatic LockingDifferential....................................................137Wheel NutsSee: Changing a Road Wheel........................287Wheels and Tires.........................................269Technical Specifications.................................289Windows and Mirrors...................................60Windshield Washers.....................................54Windshield Wipers........................................54Wiper BladesSee: Checking the Wiper Blades..................249Wipers and Washers.....................................54
382
2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingIndex