check engine FORD F650/750 2023 Repair Manual

Follow the tire manufacturer's
recommended cold inflation pressure for
the tire size, load range (ply rating) and
steer axle loading typical for their operation
(each steer axle tire equals ½ steer axle
loading).
Special applications may warrant a setting
based on experience with the type of tire
operating loads and conditions. Radial tires
are more sensitive to toe-in setting than
bias ply tires. Fine tuning school bus
alignment to line-haul truck standards
does not drastically improve tire tread life.
STEERING SYSTEM
INSPECTION
WARNING: Failure to maintain the
steering system in proper condition can
cause reduced steering ability resulting
in property damage, personal injury or
death.
Note:Have any steering problems
immediately corrected by a qualified service
technician.
Ask your service technician to examine the
steering mechanism. Only minor
adjustments may be necessary.
Regular inspections should include:
• Checking the tie rod, drag link end
clamp bolts and ball joints for proper
tightness.
• Checking for installation and spread of
cotter pins and tightness of nuts at
both ends of the tie rod and drag link.
• Checking that the pitman arm (steering
arm at steering gear) mounting is tight
and locked. Check system for leaks or
hose chafing. Repair immediately, if
necessary.• Maintaining proper steering gear and
power steering pump lubricant levels.
• Checking steering column joint bolts
and steering linkage, particularly for
body-to-chassis clearance.
Steering Column Joint Bolts
As a good maintenance practice, check
steering column joint bolt tightness every
60,000 mi (96,000 km) or annually,
whichever occurs first. Do not overtighten
the bolts.
Hydraulic System
Whenever draining and refilling the power
steering's hydraulic system for any reason,
bleed air from the system before returning
the vehicle to service. Failure to bleed the
hydraulic system properly can result in
degradation of power system performance.
Consult an authorized dealer who is aware
of the proper procedures for filling and
bleeding the system.
SUSPENSION SYSTEM
INSPECTION
Note:Do not adjust air suspension height
to any setting other than the specified
setting. Altering the height setting changes
the driveline angle and may result in
unwarrantable component damage, such
as transmission component damage.
Verify drive axle air suspension height and
height control valve performance at engine
oil change intervals.
Periodically check:
• Condition of spring leaves for evidence
of fatigue, bending or breakage.
• Condition of suspension mounting
brackets and bushings.
• Torque rod mounting fasteners for
tightness.
259
Maintenance

• For proper suspension alignment.
Maintain proper alignment at all times.
• U-bolts. After the chassis has been
operating under load for 1,000 mi
(1,600 km) or six months (whichever
comes first), the U-bolt nuts must be
re-torqued. Re-torque the U-bolt nuts
every 37,000 mi (60,000 km)
thereafter. Clean and lubricate the
U-bolt and nut threads and seats to
make sure a like new condition when
re-torqueing. See Spring U-Bolt
Check (page 260).
FRAME AND TOW HOOK
INSPECTION
Your vehicle's chassis is manufactured
with frame rails of either HSLA steel or
heat-treated steel. Handle each in a
specific manner to make sure maximum
service life. Consult the service manual or
an authorized dealer before attempting
frame repair or modification.
It is important, particularly on vehicles that
use tow hooks frequently, to inspect the
front and rear tow hooks for damage or a
loose mounting.
REAR AXLE FLUID CHECK
Your rear axle may have an optional
synthetic lubricant that allows the use of
extended service intervals. A tag on the
filler plug identifies the use of the synthetic
lubricant.
Only use a lubricant that meets
manufacturer specifications. Use of a
non-approved rear axle lubricant may
cause internal axle component damage.
See Rear Axle Fluid Capacity and
Specification (page 305).
Checking the Fluid Level
1. Park your vehicle on level ground.2. Set the parking brake and shift into
position neutral (N) or park (P). Turn
the engine off.
3. Clean any dirt from around the axle
filler plug.
4. Remove the filler plug and inspect the
lubricant level. It should be at the
bottom of the filler plug opening.
5. Add lubricant, if necessary, through the
filler plug opening.
6. Clean and install the filler plug securely.
Changing the Fluid
Note:Drain the rear axle while the lubricant
is warm.
1. Park your vehicle on level ground.
2. Set the parking brake and shift into
position neutral (N) or park (P). Turn
the engine off.
3. Clean any dirt from around the axle
filler and drain plugs.
4. Remove the filler and drain plugs. Drain
the lubricant into a suitable container.
Dispose of all used automotive fluids
in a responsible manner following your
local authorized standards.
5. Clean and install the drain plug
securely.
6. Add lubricant through the filler plug
opening.
7. Clean and install the filler plug securely.
SPRING U-BOLT CHECK
Check and tighten the U-bolt nuts after
your vehicle has been operated under load
for 1,000 mi (1,600 km) or six months,
whichever occurs first.
Check and tighten the U-bolt nuts every
37,000 mi (60,000 km).
Check and tighten the U-bolt nuts with
your vehicle at curb height and unloaded.
260
Maintenance

• With your foot on the brake, shift
through all the gears while the engine
is running.
• We recommend that you change the
engine oil before you use your vehicle
again.
Fuel system
• Fill the fuel tank with high-quality fuel
until the first automatic shutoff of the
fuel pump nozzle.
Cooling system
• Protect against freezing temperatures.
• When removing your vehicle from
storage, check coolant fluid level.
Confirm that there are no cooling
system leaks and that fluid is at the
recommended level.
Disconnecting Your 12 Volt Battery
• Check and recharge as necessary. Keep
connections clean.
• If storing your vehicle for more than 30
days without recharging the battery,
we recommend that you disconnect
the battery cables to maintain battery
charge for quick starting.
Note:It is necessary to reset memory
features if you disconnect the battery
cables.
Brakes
• Make sure the brakes and parking brake
release fully.
Tires
• Maintain recommended air pressure.
Miscellaneous
• Make sure all linkages, cables, levers
and pins under your vehicle are covered
with grease to prevent rust.
• Move vehicles at least 25 ft (7.5 m)
every 15 days to lubricate working parts
and prevent corrosion.
Removing Vehicle From Storage
When your vehicle is ready to come out of
storage, do the following:
• Wash your vehicle to remove any dirt
or grease film build-up on window
surfaces.
• Check windshield wipers for any
deterioration.
• Check under the hood for any foreign
material that may have collected
during storage such as mice or squirrel
nests.
• Check the exhaust for any foreign
material that may have collected
during storage.
• Check tire pressures and set tire
inflation per the Tire Label.
• Check brake pedal operation. Drive
your vehicle 15 ft (4.5 m) back and
forth to remove rust build-up.
• Check fluid levels (including coolant,
oil and gas) to make sure there are no
leaks, and fluids are at recommended
levels.
• If you remove the battery, clean the
battery cable ends and check for
damage.
Contact an authorized dealer if you have
any concerns or issues.
268
Vehicle Care

VEHICLE IDENTIFICATION
NUMBER
LOCATING THE VEHICLE
IDENTIFICATION NUMBER
The vehicle identification number is on the
left-hand side of the instrument panel.
E311767
Note:In the illustration, XXXX is
representative of your vehicle identification
number.
VEHICLE IDENTIFICATION
NUMBER OVERVIEW
The vehicle identification number contains
the following information:
E142477
World manufacturer identifier. A
Brake system, gross vehicle
weight rating, restraint devices
and their locations. B
Make, vehicle line, series, body
type. C
Engine or motor type. D
Check digit. E
Model year. F
Assembly plant. G
Production sequence number. H
307
Vehicle Identification

Less Cost to Properly Maintain Your
Vehicle
Ford Protect extended service plan also
offers a Premium Maintenance Plan that
covers all scheduled maintenance, and
selected wear items. The coverage is
prepaid, so you never have to worry about
the cost of your vehicle’s maintenance.
Covered maintenance includes:
• Windshield wiper blades.
• Spark plugs.
• The clutch disc (if equipped).
• Brake pads and linings.
• Shock absorbers.
• Struts.
• Engine belts.
• Engine coolant hoses, clamps and
O-rings.
• Diesel exhaust fluid replenishment (if
equipped).
• Cabin air filter replacement every
20,000 mi (32,000 km) (electric
vehicles only).
Interest Free Finance Options
Just a 5% down payment will provide you
with an affordable, no interest, no fee
payment program allowing you all the
security and benefits Ford Protect
extended service plan has to offer while
paying over time. You are pre-approved
with no credit check or hassles. To learn
more, call our Ford Protect extended
service plan specialists at 800-367-3377.
Ford Protect Extended Service Plan
P.O. Box 321067
Detroit, MI 48232Ford Protect Extended Service
Plan (CANADA ONLY)
You can get more protection for your
vehicle by purchasing a Ford Protect
extended service plan. Ford Protect
extended service plan is the only service
contract backed by Ford Motor Company
of Canada, Limited. Depending on the plan
you purchase, Ford Protect extended
service plan provides benefits such as:
• Rental reimbursement.
• Coverage for certain maintenance and
wear items.
• Protection against repair costs after
your New Vehicle Limited Warranty
Coverage expires.
• Roadside Assistance benefits.
There are several Ford Protect extended
service plans available in various time,
distance and deductible combinations.
Each plan is tailored to fit your own driving
needs, including reimbursement for towing
and rental. When you purchase Ford
Protect extended service plan, you receive
added peace-of-mind protection
throughout Canada, the United States and
Mexico, provided by a network of
participating authorized Ford Motor
Company dealers.
Note:Repairs performed outside of Canada
and the United States are not eligible for
Ford Protect extended service plan
coverage.
This information is subject to change. For
more information; visit your local Ford of
Canada dealer or www.ford.ca to find the
Ford Protect extended service plan that is
right for you.
318
Ford Protect

There are three types of maintenance
intervals for general vehicle environments:
On-Highway, City and Severe Service. In
all applications, monitoring miles
(kilometers) and time and when the engine
is due for an oil change determine the
actual interval. When the engine oil change
is required before the truck lubrication
interval, perform the lubrication at the
same time in order to reduce your vehicle’s
time out of service.
Air Brake Adjustment
WARNING: Failure to maintain
proper air brake adjustment can result
in reduction or loss of braking ability.
A qualified service technician, keeping to
the instructions in the service manual,
should perform air brake inspection and
adjustment or repairs.
Cam Brakes - Automatic Slack
Adjusters
WARNING: Do not manually adjust
the automatic slack adjusters to correct
excessive push rod stroke as it may result
in reduced brake effectiveness and a
vehicle crash. Excessive push rod stroke
indicates that a problem exists with the
automatic adjuster, with the installation
of the adjuster, or with foundation brake
components that manual adjustment
does not remedy. Seek service from a
qualified facility for excessive push rod
stroke.
Inspect standard air brakes equipped with
automatic slack adjusters for proper brake
adjustment as listed in the maintenance
schedule charts.
However, inspect the brakes more
frequently when subjecting them to heavy
use or adverse operating conditions such
as:
• Frequent brake applications while fully
loaded.
• Operation on hilly or mountainous
terrain.
• Frequent operation on dirt, gravel or
mud.
Some aftermarket brake linings also
require more frequent inspections.
Owner Checks and Services
Make sure you perform the following basic
maintenance checks and inspections every
month or at six-month intervals.
Check Every Month
Air filter restriction gauge.1
Engine oil level.
Fuel and water separator. Drain if necessary, or if indicated by the information display.
1
Function of all interior and exterior lights.
Holes and slots in the tail pipe to make sure they are functional and clear of debris.
1
321
Scheduled Maintenance

Check Every Month
Tires (including spare) for wear and proper pressure.
Windshield washer fluid level.
1Diesel engine only.
Check Every Six Months
Battery connections. Clean if necessary.
Body and door drain holes for obstructions. Clean if necessary.
Cooling system fluid level and coolant concentration (freeze-point protection).
Door weatherstrips for wear. Lubricate if necessary.
Hinges, latches and outside locks for proper operation. Lubricate if necessary.
Parking brake for proper operation.
Safety belts and seat latches for wear and function.
Safety warning lamps (brake, ABS, airbag and safety belt) for operation.
Washer spray and wiper operation. Clean or replace blades as necessary.
Tightening Lug Nuts
Tighten the lug nuts to the specified torque1 at 500 mi
(800 km) after any wheel disturbance (such as tire rota-
tion, changing a flat tire or wheel removal). Single rear wheels
Tighten the wheel lug nuts to the specified torque
1 at
100 mi (160 km), and again at 500 mi (800 km) of new
vehicle operation and after any wheel disturbance (such
as tire rotation, changing a flat tire or wheel removal). Dual rear wheels
1 See Technical Specifications (page 286).
322
Scheduled Maintenance

Multi-point Inspection
In order to keep your vehicle running right,
it is important to have the systems on your
vehicle checked regularly. This can help
identify potential issues and prevent majorproblems. We recommend having the
following multi-point inspection performed
at every scheduled maintenance interval
to help make sure your vehicle keeps
running great.
Multi-point Inspection
Horn operation Accessory drive belt(s)
Radiator, cooler, heater and A/C hoses Battery performance
Suspension component for leaks or
damage Engine air filter
Steering and linkage Exhaust system
Tires (including spare) for wear and proper
pressure
2Exterior lamps operation
Windshield for cracks, chips or pits
Fluid levels
1; fill if necessary
Washer spray and wiper operation For oil and fluid leaks
Hazard warning system operation Hood rest for lubrication
1Brake, coolant recovery reservoir, automatic transmission, power steering and window
washer.
2If your vehicle is equipped with a temporary mobility kit, check the tire sealant expiration
Use By date on the canister. Replace as needed.
Be sure to ask your dealership service
advisor or technician about the multi-point
vehicle inspection. It is a comprehensive
way to perform a thorough inspection of
your vehicle. Your checklist gives you
immediate feedback on the overall
condition of your vehicle.
NORMAL SCHEDULED
MAINTENANCE
Intelligent Oil-Life Monitor™ -
Diesel Engine Only
Your diesel engine has an Intelligent
Oil-Life Monitor that determines when you
should change the engine oil based on how
you use your vehicle. By using several
important factors in its calculations, the
monitor helps reduce the cost of owning
your vehicle and reduces environmental
waste at the same time.
323
Scheduled Maintenance

Gasoline Engines
7,500 mi (12,000 km) or Six Months Whichever Comes First
Rotate the tires, inspect tire wear and measure the tread depth.1
Inspect the wheels and related components for abnormal noise, wear, looseness or
drag.
Perform a multi-point inspection, recommended.
Inspect front oil hubs for leaks and check fluid level through hub cap sight glass.
1 Rotate the front wheels on vehicles with dual rear wheels when specified. Only rotate
the rear wheels if you notice unusual wear.
10,000 mi (16,000 km) /450 Engine Hours or 12 Months Whichever Comes First
Change the engine oil and filter.
15,000 mi (24,000 km) or 12 Months Whichever Comes First
Inspect the automatic transmission fluid level. Consult an authorized dealer for
requirements.
Inspect the brake pads, shoes, rotors, drums, brake linings, hoses and the parking brake.
Inspect the engine cooling system concentration, freeze-point protection, level and
hoses.
Inspect the exhaust system and heat shields.
Inspect the steering linkage, ball joints, suspension, tie-rod ends, driveshaft and the U-
joints. Lubricate any components that have grease fittings.
Brake Fluid Maintenance1
Change the brake fluid.2Every 3 Years
1 Perform this maintenance item every 3 years. Do not exceed the designated time for
the interval.
2 Brake fluid servicing requires special equipment available at your authorized dealer.
325
Scheduled Maintenance

At Every Oil Change Interval as Indicated by the Information Display1
Perform a multi-point inspection, recommended.
Inspect the air filter restriction gauge. Replace the filter if necessary.
Inspect the automatic transmission fluid level. Consult an authorized dealer for
requirements.
Inspect the brake pads, shoes, rotors, drums, brake linings, hoses and the parking brake.
Inspect the engine and secondary coolant concentration, freeze-point protection, level
and hoses.
Inspect the exhaust system and heat shields.
Inspect the steering linkage, ball joints, suspension, tie-rod ends, driveshaft and the U-
joints. Lubricate any components that have grease fittings.
Inspect front oil hubs for leaks and check fluid level through hub cap sight glass.
1 Do not exceed one year/10,000 mi (16,000 km) or 350 engine hours between service
intervals.
2 Reset the Intelligent Oil-Life Monitor after engine oil and filter changes. See Oil Change
Indicator Reset (page 227).
3 Rotate the front wheels on vehicles with dual rear wheels when specified. Only rotate
the rear wheels if you notice unusual wear.
Brake Fluid Maintenance1
Change the brake fluid.2Every 3 Years
1 Perform this maintenance item every 3 years. Do not exceed the designated time for
the interval.
2 Brake fluid servicing requires special equipment available at your authorized dealer.
Other Maintenance Items1
Replace the engine-mounted and frame-mounted fuel
filters.2Every 22,000 mi
(36,000 km)
Inspect the engine and secondary cooling system coolant
concentration, freeze-point protection, additive, corrosion
inhibitor, strength, coolant level, and hoses. Add coolant
additive if necessary.
3
Every 30,000 mi
(48,000 km)
327
Scheduled Maintenance