2023 FORD SUPER DUTY fuel cap

WHAT IS THE SELECTIVE
CATALYTIC REDUCTION
SYSTEM
The selective catalytic reduction systemhelps reduce tailpipe emissions andrequires Diesel Exhaust Fluid (DEF) toconvert nitrogen oxides into nitrogen andwater.
HOW DOES THE SELECTIVE
CATALYTIC REDUCTION
SYSTEM WORK
The selective catalytic reduction systeminjects diesel exhaust fluid into the exhaustsystem to enable correct selective catalyticreduction system function.
The usage of diesel exhaust fluid hasincreased from prior model years in orderto meet more stringent emissionsrequirements. The diesel exhaust fluidusage ranges from approximately 2-6%of fuel burned (100.00 gal (378.54 L) offuel requires approximately 2.00 gal(7.57 L)to 6.00 gal (22.71 L) of dieselexhaust fluid) depending on vehicle usage.Factors that influence diesel exhaust fluidusage may include:
•Payload/Towing
•Driving Style
•Altitude
•Humidity
•Temperature
SELECTIVE CATALYTIC
REDUCTION SYSTEM
PRECAUTIONS
WARNING: Keep diesel exhaustfluid out of reach of children. Avoidcontact with skin, eyes or clothing. Incase of contact with your eyes, flushimmediately with water and get promptmedical attention. In case of contactwith your skin, clean immediately withsoap and water. If you swallow anydiesel exhaust fluid, drink plenty ofwater, call a physician immediately.
WARNING: Only refill the dieselexhaust fluid tank in a well ventilatedarea. When you remove the dieselexhaust fluid tank filler cap or a dieselexhaust fluid container cap, ammoniavapors may escape. Ammonia vaporscan be irritating to skin, eyes and mucousmembranes. Inhaling ammonia vaporscan cause burning to the eyes, throat andnose and cause coughing and wateryeyes.
WARNING: Diesel exhaust fluidmust be refilled when low or replacedwhen contaminated or your vehiclespeed becomes limited to 50 mph(80 km/h). In these conditions, drive withcaution and refill diesel exhaust fluidimmediately. If the diesel exhaust fluidbecomes empty or contaminated andfluid is not replaced, your vehiclebecomes limited to engine idle only oncestopped. In these conditions, be cautiouswhere you stop your vehicle because youmay not be able to drive long distancesor maintain highway speeds until yourefill or replace the diesel exhaust fluid.
226
2023 Super Duty (TFH) Canada/United States of America, enUSA, Edition date: 202211, DOMSelective Catalytic Reduction System (If Equipped)

If the DEF tank is frozen, it may notrecognize when the tank is refilled. The DEFlevel will update once the tank thaws out.It is best to fill the DEF tank prior to, or aftera drive cycle greater than 20 minutes toallow the remaining frozen DEF in the tankto liquefy. If the tank is overfilled and thefluid freezes it may cause damage thatyour Warranty will not cover.
FILLING THE SELECTIVECATALYTIC REDUCTION SYSTEMTANK USING A FUEL STATIONPUMP
Filling the diesel exhaust fluid tank usinga fuel station pump is similar to refuelingyour vehicle.
1.Fully open the fuel filler door.
2.Remove the diesel exhaust fluid tankfiller cap.
Note:The diesel exhaust fluid tank has ablue filler cap.
3.Fully insert the diesel exhaust fluidpump nozzle.
4.Operate the diesel exhaust fluid pumpnozzle within the area shown.
Note:The pump nozzle shuts off when thetank is full.
5.Slightly raise the diesel exhaust fluidpump nozzle and then slowly removeit.
6.Replace the diesel exhaust fluid tankfiller cap. Turn it clockwise until youfeel a strong resistance and it clicks.
FILLING THE SELECTIVECATALYTIC REDUCTION SYSTEMTANK USING A PORTABLECONTAINER
The following procedure applies toMotorcraft diesel exhaust fluid or similarfluid containers. Follow themanufacturer's instructions.
1.Fully open the fuel filler door.
2.Remove the diesel exhaust fluidcontainer cap.
3.Place the spout on to the container andtighten it until you feel a strongresistance.
229
2023 Super Duty (TFH) Canada/United States of America, enUSA, Edition date: 202211, DOMSelective Catalytic Reduction System (If Equipped)E328788 E328783

HOW DOES FOUR-WHEEL
DRIVE WORK
Using the Electronic Shift On theFly System (If Equipped)
This four-wheel drive system utilizes a2-speed Electronic Shift On the Fly (ESOF)transfer case which is also known as apart-time system. This system offers thedriver two-wheel drive high, four-wheeldrive high, and four-wheel drive low asavailable modes of operation. When youselect either four-wheel drive high orfour-wheel drive low, the system providesmechanically locked four-wheel drivepower to both the front and rear wheelsfor use in off-road or slippery conditionssuch as deep snow, sand or mud. Whenyou select four-wheel drive low, the systemprovides additional gearing for increasedtorque multiplication for conditions likedeep sand, steep slopes, or pulling heavyobjects. Additionally, the system is capableof recreational flat towing by putting thetransfer case into a neutral position. SeeRecreationally Towing Your Vehicle(page 427).
There is further information available ondriving in unique driving conditions. SeeOff-Road Driving (page 412).
Your vehicle has manual hub locks on thedriver side and passenger side of yourvehicle. For proper operation, make surethat each hub is fully engaged and thatboth hub locks are set to the same position(both set to lock or both set to auto). Toengage lock, turn the hub locks completelyclockwise. To engage auto, turn the hublocks completely counterclockwise.
The ESOF four-wheel drive system:
•Provides 4x4 High engagement anddisengagement while the vehicle ismoving.
•Operates by a push button controllocated on the instrument panel thatallows you select 4x2, 4x4 High or 4x4Low operation.
•Uses auto-manual hub locks. When setto auto, the hubs engage anddisengage automatically based on the4x4 mode you select. When set to lock,the hubs remain engaged at all times.
•Increases fuel economy when used inthe hub lock's recommended automode.
Note:Auto-manual hub locks manuallylock by rotating the hub lock control fromauto to lock.
Note:Hub locks should be in auto modewhen in 4x2 mode. If hub locks are in lockmode in 4x2 mode, there will be additionalnoise from the front axle.
238
2023 Super Duty (TFH) Canada/United States of America, enUSA, Edition date: 202211, DOMFour-Wheel Drive (If Equipped)LOCKOTUAE339076

CONNECTING A TRAILER
PRECAUTIONS
Do not tow a trailer until you drive yourvehicle at least 1,000 mi (1,600 km).
Consult your local motor vehicle laws fortowing a trailer.
See the instructions included with towingaccessories for the proper installation andadjustment specifications.
Service your vehicle more frequently if youtow a trailer. See Normal ScheduledMaintenance (page 600).
If you use a rental trailer, follow theinstructions the rental agency gives you.
When attaching the trailer wiring connectorto your vehicle, only use a proper fittingconnector that works with the vehicle andtrailer functions.
Account for the trailer coupler weight aspart of your vehicle load when calculatingthe total vehicle weight.
Do not exceed the load limits. SeeCalculating the Load Limit (page 353).
HITCHES
INSTALLING A HITCH
WARNING: You must use theheavy-duty drawbar pin supplied withyour vehicle when using the heavy-dutyhitch. Failure to follow this instructioncould result in the loss of control of yourvehicle, personal injury or death.
WARNING: You must use thedrawbar pin supplied with your vehicleor a pin that is designed to meet themaximum rating of your hitch. Failure tofollow this instruction could cause thetrailer to disconnect resulting in the lossof control of your vehicle, personal injuryor death.
Do not use a hitch that either clamps ontothe bumper or attaches to the axle.Distribute the load in your trailer so that10-15% for conventional towing or 15-25%for fifth wheel towing of the total weightof the trailer is on the tongue. Do notexceed the tongue load rating indicatedon the conventional hitch receiver.
Note:On pickup trucks, the trailer hitchprovided on the vehicle enhances crashprotection for the fuel system. Do notremove.
Hitch Components
The following components are required.Some are provided in certain vehicles.
•A trailer hitch with a 3 inch receiver anda 5/8 inch hitch pin. Check thestamped rating number on the pin todetermine the 21,200 lb (9,616 kg) or24,200 lb (10,976 kg) hitch pincapacity.
•A hitch pin sleeve stored in the glovecompartment to use when mountingthe 3 inch drawbar with the 3/4 inchpinhole.
•A cotter pin to help keep the hitch pinin place.
•A trailer hitch with a 3 inch receiver anda 5/8 inch hitch pin. Check thestamped rating number on the pin todetermine the 30,000 lb (13,607 kg)hitch pin capacity.
359
2023 Super Duty (TFH) Canada/United States of America, enUSA, Edition date: 202211, DOMConnecting a Trailer

Maximum WadingCapabilityModel
22 in (560 mm)1Vehicles withoutTremor or XL Off-Road Packages
30 in (762 mm)XL Off-RoadPackage
33 in (838 mm)Tremor Package
1 Bottom of the doors.
When you are driving through water do notexceed 4 mph (7 km/h).
Never stop or shut a vehicle off whencrossing deep water unless your vehicleingested water into the engine air intake.If the engine stalls, do not attempt torestart it. Keep the doors fully closed duringa water crossing.
Extra care must be taken crossing any typeof water. Do not drive into water unlessnecessary. Only drive through areas thatare designated and approved. Determineexit points that are downstream of yourentry point to allow for drifting. If there areother vehicles ahead, wait until they haveleft the water. Unsettled water can makea safe passage more challenging.
High currents even in shallow water canwash the dirt out from around your tires orpush your vehicle across slippery rocks orsurfaces. Never attempt to cross flowingwater that is deeper than your vehicle'sground clearance. Even in low currents yourvehicle's body surface area can be pusheddownstream and out of control. Do notcross any body of water that is fast flowingand rising, wait for the flow rate to reduce.
Vehicles used to traverse water regularlyshould be periodically inspected for signsof water ingestion in all of the vehicle'sfluids. If water is found inside your vehiclefluids, service your vehicle or see anauthorized dealer.
After driving through water and as soon asit is safe to do so, check the brakes, horn,lights, and steering wheel to make sureeverything is still in working order.
AFTER DRIVING YOUR VEHICLEOFF-ROAD
WARNING: After off-road use,before returning to the road, check thewheels and tires for damage. Off-roaduse may cause damage to your wheelsand tires that can lead to tire failure, lossof vehicle control, serious injury or death.
WARNING: Always re-inflate tiresto recommended tire pressures beforethe vehicle is operated on-road. Therecommended pressure is located on thetire label or safety certification label,located on the B-pillar, inside the driver'sdoor.
Driving off-road places more stress on yourvehicle than most on-road driving. Afterdriving off-road check for damage to yourvehicle and, if necessary, have your vehiclefixed as soon as possible.
Inspect the underbody of your vehicle bychecking tires, body structure, steering,suspension, and exhaust system fordamage.
Check the radiator for mud and debris andclean as needed.
Remove accumulations of plants or brush.These things could be a fire hazard or hidedamage to the fuel lines, brake hoses, andpropeller shafts.
414
2023 Super Duty (TFH) Canada/United States of America, enUSA, Edition date: 202211, DOMDriving Hints

MAINTENANCE PRECAUTIONS
Service your vehicle regularly to helpmaintain its roadworthiness and resalevalue. There is a large network ofauthorized dealers that are there to helpyou with their professional servicingexpertise. We believe that their speciallytrained technicians are best qualified toservice your vehicle properly and expertly.They are supported by a wide range ofhighly specialized tools developedspecifically for servicing your vehicle.
If your vehicle requires professional service,an authorized dealer can provide thenecessary parts and service. Check yourwarranty information to find out whichparts and services are covered.
Use only recommended fuels, lubricants,fluids and service parts conforming tospecifications. See Capacities andSpecifications (page 520).
•Do not work on a hot engine.
•Make sure that nothing gets caught inmoving parts.
•Do not work on a vehicle with theengine running in an enclosed space,unless you are sure you have enoughventilation.
•Keep all open flames and other burningmaterial, such as cigarettes, away fromthe battery and all fuel related parts.
•Set the parking brake, shift thetransmission to park (P) and block thewheels.
OPENING AND CLOSING THE
HOOD
1.Inside the vehicle, pull the hood releasehandle located under the left hand sideof the instrument panel.
2.Go to the front of your vehicle andlocate the secondary release leverunder the front of the hood near thecenter of your vehicle.
3.Raise the hood until the lift cylindershold it open.
4.To close, lower the hood and makesure that it is closed properly and fullylatched.
440
2023 Super Duty (TFH) Canada/United States of America, enUSA, Edition date: 202211, DOMMaintenance E166491 E190266

UNDER HOOD OVERVIEW - 6.7L DIESEL
Battery. See Changing the 12V Battery (page 457).A
Under hood fuse box. See Accessing the Under Hood Fuse Box (page 430).B
Engine oil dipstick. See Engine Oil Dipstick Overview (page 444).C
Secondary fuel filter. See Changing the Fuel Filter (page 453).D
Engine oil filler cap. See Checking the Engine Oil Level (page 444).E
Engine cooling system coolant reservoir - primary high-temperature coolingsystem. See Checking the Coolant Level (page 450).F
Brake fluid reservoir. See Checking the Brake Fluid (page 249).G
Battery. See Changing the 12V Battery (page 457).H
Windshield washer fluid reservoir. See Adding Washer Fluid (page 115).I
Power steering fluid reservoir. See Checking the Hydraulic Power SteeringFluid (page 280).J
Secondary cooling system coolant reservoir. See Checking the Coolant Level(page 450).K
Air filter assembly. See Changing the Engine Air Filter (page 445).L
441
2023 Super Duty (TFH) Canada/United States of America, enUSA, Edition date: 202211, DOMMaintenanceE350655

ENGINE SPECIFICATIONS - 6.7L DIESEL
6.7L V8 Diesel EngineEngine
406 in³ (6,651 cm³)Displacement.
Ultra Low Sulfur Diesel up to B20Required fuel.
1-3-7-2-6-5-4-8Firing order.
15.2:1Compression ratio.
520
2023 Super Duty (TFH) Canada/United States of America, enUSA, Edition date: 202211, DOMCapacities and Specifications