low oil pressure FORD F650/750 2024 Owners Manual

Right-hand side.A
Left-hand side.B
Warnings
WARNING: Throughout this guide,you will find warnings identified by thewarning symbol. Warnings remind youto be especially careful to reduce the riskof personal injury.
Diesel Engine Information
The diesel engine fuel system is apressurized two-stage filtration systemand consists of:
•A frame-mounted Fuel and WaterSeparator primary filter with an electricfuel pump and water drain
•An engine-mounted secondary fuelfilter
•A fuel injector for each cylinder (8total)
•A high-pressure fuel pump
•A high-pressure fuel rail for eachcylinder bank (2 total)
•Numerous high-pressure pipes fromthe high-pressure pump to the rails,and rails to the injectors
The fuel and water separator removesboth water and impurities from the fuel.The engine-mounted filter filters finerimpurities from the diesel fuel. Theengine-mounted fuel filter and theframe-mounted fuel filter should bechanged at the recommended serviceinterval or when indicated by theinformation display LOW FUEL PRESSUREmessage. See Scheduled Maintenance(page 325).
The fuel and water separator should bedrained at regular intervals (recommendedat every oil change) or when indicated bythe information display and water in fuelindicator light. See Fuel Quality (page108).
Proper fuel filter maintenance and promptwater draining when the water in fuel lightilluminates is essential to prevent injectionequipment damage. Ignoring the water infuel light or the information displaymessage WATER IN FUEL DRAIN FILTERcan cause your vehicle to go into a reducedpower mode.
A frame-mounted electric fuel pumplocated inside the fuel and water separatordraws fuel from the fuel tank to providepressurized fuel to the engine. The fuelpump contains a pressure relief valve foroverpressure protection in the event ofrestricted flow.
The fuel injection system is controlledthrough the powertrain control module.
Engine Protection Mode
Ford diesel engines are equipped withengine protection and emission controlsystems. These systems monitor criticaltemperatures and pressures, and modifyengine operation accordingly. Thesemodified engine performancecharacteristics are normal.
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2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingIntroductionE154903

•The gearshift lever must be in P (Park)or N (Neutral) in order for the starterto operate.
•Try operating the starter switch severaltimes. This operation may cleanpotentially corroded contacts or makethe switch temporarily operable untilyou can reach the dealer.
•If all electrical connections are tightand you need assistance to start, SeeJump Starting the Vehicle (page 190).
If engine cranks but won’t start
Prolonged starter cranking (in excess of 10seconds) could cause damage to thestarter motor or the high-pressure fuelpump.
•Check the fuel gauge. You may be outof fuel. If the gauge shows that thereis fuel in the tank, the trouble may bein the electrical system or the fuelsystem. If equipped with an auxiliarytank, be sure that the tank controlswitch is set for the tank with fuel andnot on an empty tank.
•Leaving your ignition key turned to onfor over two minutes without startingmay make starting difficult becausethe glow plugs will cease activation.Reset the system by turning the ignitionkey to off and then back to on again.
Note:If the system is out of fuel and theengine will not start, do not continuecranking the engine. Continued cranking candamage the high-pressure fuel pump.
If the engine runs hot
The following could cause the engine tooverheat:
•Lack of coolant
•Dirty cooling system.
•Plugged radiator fins, A/C condenserand/or oil cooler
•Malfunctioning fan drive
•Driving with frozen coolant
•Sticking thermostat
•Overloading or pulling heavy trailersduring hot weather
•Grill or radiator air blockage
•Slipping or missing drive belt
•Plugged or very dirty air filter
If fuses burn out
WARNING: Replacement fuses andcircuit breakers must always be thesame rating as the original equipmentshown. Never replace a fuse or circuitbreaker with one of a higher rating.Higher rated fuses or circuit breakerscould allow circuit overloading in theevent of a circuit malfunction, resultingin severe vehicle damage or personalinjury due to fire.
Burned-out or blown fuses usually indicatean electrical short-circuit, although a fusemay occasionally burn out from vibration.Insert a second fuse. If this fuseimmediately burns out and you cannotlocate the cause, return your vehicle toyour dealer for a circuit check. SeeChanging a Fuse (page 211).
Selective catalytic reduction systemspeed limit and Idle-only modes
If the vehicle’s speed is limited or in anidle-only mode, the selective catalyticreduction system may be limiting thevehicle’s functions due to low orcontaminated DEF. Check the DEF. SeeSelective Catalytic Reductant System(page 120).
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2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingIntroduction

Engine Oil Pressure Gauge
Indicates engine oil pressure. At normaloperating temperature, the level indicatoris in the normal range. If the pressure gaugefalls below the normal range, stop yourvehicle, switch off the engine and checkthe engine oil level. Add oil if needed. If theoil level is correct, have your vehiclechecked by an authorized dealer.
Engine Coolant TemperatureGauge
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.
Indicates engine coolant temperature. Atnormal operating temperature, the levelindicator is in the normal range. If theengine coolant temperature exceeds thenormal range, stop your vehicle as soon aspossible, switch off the engine and let theengine cool.
Fuel Gauge
The fuel gauge indicates about how muchfuel is in the fuel tank.
The arrow adjacent to the fuel pumpsymbol indicates on which side of yourvehicle the fuel filler door is located.
Note:The fuel gauge may vary slightlywhen your vehicle is moving or on a slope.
Low Fuel Reminder
A low fuel level reminder displays andsounds when the distance to emptyreaches 50 mi (80 km),25 mi (40 km),10 mi (20 km) and 0 mi (0 km) for allvehicle keys.
Note:The low fuel reminder can appear atdifferent fuel gauge positions depending onfuel economy conditions. This variation isnormal.
Distance to Empty
Indicates the approximate distance yourvehicle can travel on the fuel remaining inthe tank. Changes in driving pattern cancause the value to not only decrease butalso increase or stay constant for periodsof time.
Configurable Gauge
Transmission Fluid Temperature Gauge
Indicates transmission fluid temperature.At normal operating temperature, the levelindicator is in the normal range. If thetransmission fluid temperature exceedsthe normal range, stop your vehicle as soonas possible and verify the airflow is notrestricted by snow or debris blockingairflow through the grille.
Special operating conditions such assnowplowing, towing, or off-road use maycause higher than normal operatingtemperatures. See Special OperatingConditions Scheduled Maintenance(page 335).
To lower the transmission temperatureinto the normal range, alter the severity ofyour driving conditions. Operating thetransmission for extended periods with thegauge in the higher than normal area maycause internal transmission damage. If thegauge continues to show hightemperatures, see an authorized dealer.
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2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingInstrument Cluster

Door Ajar
Displays when the ignition is onand any door is not completelyclosed.
Electronic Locking Differential (If
Equipped)
Illuminates when using theelectronic locking differential.
Engine Coolant Temperature
If it illuminates when your vehicleis moving, this indicates that theengine is overheating. Stop yourvehicle as soon as it is safe to do so andswitch the engine off. Have your vehiclechecked as soon as possible. See EngineCoolant Check (page 238).idk
Engine Oil Pressure
If it illuminates with the enginerunning, or when you are driving,this indicates a malfunction.Stop your vehicle as soon as it is safe todo so and switch off the engine. Check theengine oil level.
Note:Do not resume your journey if itilluminates despite the level being correct.Have the system checked as soon aspossible.
Exhaust Brake On (If Equipped)
The exhaust brake indicator lightilluminates when you switch theexhaust brake on.
Fasten Seatbelt
Illuminates and a tone soundsto remind you to fasten yourseatbelt.
High Beam
Illuminates when you switch onthe high beam headlamps. Itflashes when you use theheadlamp flasher.
Hydromax
If the light illuminates andremains on when the key is in theon position or the engine isrunning, this indicates inadequate hydraulicbooster pressure or reserve pump systemfailure. Stop the vehicle as soon aspossible and have your vehicle checked.
Low Fuel Level
Illuminates when the fuel levelis low or the fuel tank is nearlyempty. Refuel as soon aspossible.
Parking Brake Warning
Briefly illuminates when youswitch the ignition to the onposition, with the engine off. Italso illuminates when you apply theparking brake. If the park brake lamp doesnot illuminate at these times, seekimmediate service. Vehicles with the powerparking brake option: If the park brakewarning lamp begins to blink after settingthe parking brake, this may indicate afailure in the parking brake system. Havethe system checked as soon as possible.Driving extended distances with theparking brake engaged can cause brakefailure and the risk of personal injury.
Parking Lamps
Illuminates when you switch thelow beam headlamps or theparking lamps on.
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2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingInstrument Cluster E163170 E103308 E67022 E171217 E71880 E67019 E146190 E208810 E71341

Lane Departure Warning System
ActionMessage
The system has detected a condition thathas caused the system to be temporarilyunavailable. If the message continues todisplay, have the system checked as soonas possible.
Front Camera Temporarily Not Available
The system has detected a condition thatrequires you to clean the windshield in orderfor it to operate properly.
Front Camera Low Visibility Clean Screen
The system requires service, have thesystem checked as soon as possible.Front Camera Malfunction Service Required
The system requests you to keep yourhands on the steering wheel.Keep Hands on Steering Wheel
Maintenance
ActionMessage
Stop your vehicle as soon as safely possibleand turn off the engine. Check the oil level,if the warning stays on or continues to comeon with your engine running, have yourvehicle checked as soon as possible.
Low Engine Oil Pressure
The engine oil life is low and needs to bechanged soon.Change Engine Oil Soon
The engine oil life is low and needs to bechanged immediately.Oil Change Required
The brake fluid level is low, have the systemchecked as soon as possible.Brake Fluid Level Low
The brake system requires service. Stopyour vehicle in a safe place. Have thesystem checked as soon as possible.
Check Brake System
Your vehicle is still in transport or factorymode. This may not allow some featuresto operate properly. Have your vehiclechecked as soon as possible.
Factory Mode Contact Dealer
Transport Mode Contact Dealer
The powertrain requires service.See Manual
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2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingInformation Displays

Cold Weather Starting
WARNING: Do not use startingfluid, for example ether, in the air intakesystem. Such fluid could causeimmediate explosive damage to theengine and possible personal injury.
WARNING: Do not mix diesel withgasoline, gasohol or alcohol. This couldcause an explosion.
We recommend using the engine blockheater for starting when the ambienttemperature is at or below -9°F (-23°C).See Engine Block Heater (page 105).
When operating in cold weather, you canuse Motorcraft® cetane improvers ornon-alcohol-based cetane improvers froma reputable manufacturer as needed.
Do not crank the engine for more than 10seconds as starter damage may occur. Ifthe engine fails to start, turn the key to theoff position and wait 30 seconds beforetrying again.
Your vehicle may come with a coldweather starting strategy that preventssevere engine damage by assisting inengine lubrication warm-up. In extremelycold ambient temperatures, this strategyactivates and prevents the acceleratorpedal use for 30 seconds after startingyour vehicle. A message appears in theinformation display as your vehicle warmsup. By not allowing the accelerator pedaluse, the engine oil can properly lubricatethe bearings preventing engine damagedue to lack of proper lubrication. After the30 second warm-up period, theaccelerator pedal is operational again anda message appears informing you that yourvehicle is ready to drive.
When starting the engine in extremely coldtemperatures, for example -15°F (-26°C),we recommend you allow the engine toidle for several minutes before driving yourvehicle.
Illuminates when you switch theignition on as part of thepre-starting system.
1.Turn the key to the on position withoutturning the key to the start position. Donot start the engine until the wait tostart indicator turns off.
2.When the wait to start indicator turnsoff, turn the key to the start positionand release the key as soon as theengine starts. Once the engine starts,the glow plugs may remain on for aperiod. If you attempt to start theengine before the glow plug activationtime ends, but it fails to start, reset theglow plugs by turning the key to the offposition.
3.Once the engine starts, allow it to idlefor about 15 seconds. This is to protectthe engine. Do not increase enginespeed until the oil pressure gaugeindicates normal pressure.
SWITCHING OFF THE ENGINE
Allow the engine to idle for three to fiveminutes before shutting it down. The largerthe engine, the greater the need is for thisidling period.
Note:Try to limit engine idle to 10 minutes.Excessive idling reduces fuel economy.
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2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingStarting and Stopping the Engine

Biodiesel fuel is a chemically convertedproduct from renewable fuel sources, suchas vegetable oils, animal fats and wastecooking greases.
To help achieve acceptable engineperformance and durability when usingbiodiesel in your vehicle:
•Confirm the biodiesel content of thefuel to be B20 (20% biodiesel) or less
•Only use biodiesel fuel of good qualitythat complies with industry standards
•Follow the recommended servicemaintenance intervals. SeeScheduled Maintenance (page 325).
•Do not store biodiesel fuel in the fueltank for more than 1 month
•Consider changing brands or reducingbiodiesel content if you have coldtemperature fuel gelling issues or afrequent LOW FUEL PRESSUREmessage appearing
•Do NOT use raw oils, fats or wastecooking greases
Use of biodiesel in concentrations greaterthan 20% may cause damage to yourvehicle, including engine and/or exhaustafter-treatment hardware (exhaustcatalyst and particulate filter) failures.Concentrations greater than 20% can alsocause fuel filter restrictions that may resultin a lack of power or damage to fuelsystem components, including fuel pumpand fuel injector failures.
SAE 5W-40 or SAE 15W-40 oil isrecommended for fuels with greater than5% biodiesel (B5). Refer to the Specialoperating conditions section under theSchedule Maintenance chapter for moreinformation about oil change intervals andother maintenance when operating onbiodiesel.
Look for a label on the fuel pump toconfirm the amount of biodiesel containedin a diesel fuel. Biodiesel content is oftenindicated with the letter B followed by thepercent of biodiesel in the fuel. Forexample, B20 indicates a fuel containing20% biodiesel. Ask the service stationattendant to confirm the biodiesel contentof a diesel fuel if you do not see a label onthe fuel pump.
Biodiesel fuels degrade more easily thandiesel fuels not containing biodiesel andshould not be stored in the fuel tank formore than 1 month. If you plan to park orstore your vehicle for more than 1 month,then you should empty your vehicle fueltank of biodiesel fuel. You should fill thetank with a pure petroleum-based dieselfuel and run your vehicle for a minimum of30 minutes.
Note:Degraded or oxidized biodiesel candamage fuel system seals and plastics andcorrode steel parts.
During cold weather, if you have problemsoperating on biodiesel, you may need touse a diesel fuel with lower biodieselcontent, try another brand, or discontinuethe use of biodiesel.
Diesel Fuel Additives
It should not be necessary to add anyaftermarket additives to your fuel if youuse a high quality diesel fuel that conformsto ASTM industry specifications.Aftermarket additives can damage the fuelinjector system or engine.
Use Motorcraft® cetane booster or anequivalent cetane booster additive if yoususpect fuel has low cetane. UseMotorcraft® anti-gel & performanceimprover or an equivalent additive if thereis fuel gelling.
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2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingFuel and Refueling

ECONOMICAL DRIVING
Your fuel economy is affected by severalthings, such as how you drive, theconditions you drive under, and how youmaintain your vehicle.
You may improve your fuel economy bykeeping these things in mind:
•Accelerate and slow down in a smooth,moderate fashion.
•Drive at steady speeds withoutstopping.
•Anticipate stops; slowing down mayeliminate the need to stop.
•Close the windows for high-speeddriving.
•Drive at reasonable speeds. Travelingat 55 mph (90 km/h) uses 15% lessfuel than traveling at 65 mph(105 km/h).
•Keep the tires properly inflated and useonly the recommended size.
•Use the recommended engine oil.
•Perform all regularly scheduledmaintenance.
Avoid these actions; they reduce your fueleconomy:
•Sudden accelerations or hardaccelerations.
•Warm up your vehicle on coldmornings.
•Use the air conditioner.
•Use the speed control in hilly terrain.
•Rest your foot on the brake pedal whiledriving.
•Carry unnecessary weight.Approximately 1 mpg [0.4 km/L] is lostfor every 400 lb (180 kg) of weightcarried.
•Driving with the wheels out ofalignment.
Conditions
•Adding certain accessories to yourvehicle may reduce fuel economy. Forexample bug deflectors, rollbars, lightbars, running boards, ski racks orluggage racks.
•Using fuel blended with alcohol maylower fuel economy.
•Fuel economy may decrease with lowertemperatures during the first 5–10 mi(12–16 km) of driving.
•Driving on flat terrain offers improvedfuel economy as compared to drivingon hilly terrain.
•Transmissions give their best fueleconomy when operated in the topcruise gear and with steady pressureon the gas pedal.
COLD WEATHER
PRECAUTIONS - 6.7L DIESEL
Winter Grille Cover (If Equipped)
The winter grille cover enhances heaterperformance and will reduce the amountof time it takes to warm the inside of yourvehicle in extremely cold conditions below-0.4°F (-18°C).
The winter grille cover installs over theoutside of the front grille and restricts theair flowing to the engine compartment bycovering the radiator grille openings.
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2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingDriving Hints

Protected ComponentRatingItem
Not used.—26
Upfitter battery feed.20 A27
Not used.—28
Glow plug relay coil.10 A29
Not used.—30
Hydromax pump.60 A31
Powertrain control module.20 A32
Heater exhaust gas oxygensensor 11 (gas).20 A33
Heater exhaust gas oxygensensor 12 (gas).Heater exhaust gas oxygensensor 21 (gas).Canister vent solenoid (gas).Canister purge solenoid(gas).Variable camshaft timingactuator 11 (gas).Exhaust gas recirculationcooling bypass valve(diesel).
A/C clutch relay (diesel).10 A34Variable oil pump (diesel).Cooling fan (diesel).Fan clutch (gas).Exhaust brake switch(diesel).Variable oil pressure control(gas).Customer access vehiclepower 3 feed.
Coil on plug (gas).20 A35Nitrogen oxide sensorcontrol module feedgas(diesel).Nitrogen oxide sensorcontrol module midbed(diesel).
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2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingFuses

VEHICLE INSPECTION
INFORMATION
To make sure your vehicle is ready tooperate, conduct a pre-trip inspection atthe beginning of each work period. Followthe steps listed in this section to verify aproper vehicle inspection procedure.
WARNING: Exercise great cautionwhen working on a vehicle equipped withan automatic fan clutch. The fan startsin motion only after the engine coolantreaches a predetermined temperatureor the refrigerant pressure (if equippedwith air conditioning) reaches apredetermined setting. The fan starts atthis point with no advance warning.Never reach near, or permit objects toprotrude into, the fan blade radius whilethe engine is running as this could resultin vehicle damage, personal injury ordeath.
WARNING: Do not operate thevehicle if any suspension conditionslisted in the following charts are evident.Loss of steering or suspension couldresult in property damage, personal injuryor death.
WARNING: If a wheel must bechanged, obtain expert tire service help.Mounting and un-mounting of tiresshould only be performed by a qualifiedtechnician using necessary safetyprocedures and equipment, otherwisethe result could be property damage,personal injury or death.
Note:Always make sure you apply theparking brake before starting the engine.
Engine compartment (with engine off)
Use the dipstick to verify the oil level is in the proper operatingrange. See Engine Oil Dipstick (page 227).Engine oil
Look through the plastic reservoir and verify the coolant levelis within the proper operating range. Do not remove thepressure cap until the coolant has cooled. See EngineCoolant Check (page 238).
Engine coolant
Verify that the fluid level is in the proper operating range. SeePower Steering Fluid Check (page 246).Power steering fluid
Remove the master cylinder caps and inspect the fluid level.See Brake Fluid Check (page 245).Brake fluid
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2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingVehicle Inspection Guide