
Reporting Safety Defects (U.S. Only)
........................................................................\
.197
Reporting Safety Defects (Canada Only) ........................................................................\
198
Fuses
Fuse Specification Chart ..........................
199
Changing a Fuse ..........................................
207
Vehicle Inspection Guide
Vehicle Inspection Information .............
209
Maintenance
General Information ...................................
218
Opening and Closing the Hood ..............
219
Under Hood Overview - 6.7L Diesel ......
221
Under Hood Overview - 7.3L ...................
222
Engine Oil Dipstick - 6.7L Diesel ............
223
Engine Oil Dipstick - 7.3L ..........................
223
Engine Oil Check - 6.7L Diesel ................
223
Engine Oil Check - 7.3L .............................
224
Changing the Engine Oil and Oil Filter ........................................................................\
225
Oil Change Indicator Reset .....................
226
Changing the Engine Air Filter - 6.7L Diesel ...........................................................
227
Changing the Engine Air Filter - 7.3L .....
229
Draining the Fuel Filter Water Trap - 6.7L Diesel ............................................................
231
Engine Coolant Check - 6.7L Diesel ......
232
Engine Coolant Check - 7.3L ...................
237
Automatic Transmission Fluid Check ........................................................................\
.
241
Brake Fluid Check .......................................
243
Power Steering Fluid Check ...................
244
Changing the 12V Battery ........................
245
Adjusting the Headlamps .......................
246
Washer Fluid Check ...................................
248
Fuel Filter - 7.3L ...........................................
248
Checking the Wiper Blades ....................
248
Changing the Wiper Blades ....................
248Removing a Headlamp
............................
249
Changing a Bulb .........................................
249
Changing the Engine-Mounted and Diesel Fuel Conditioner Module Fuel
Filters - 6.7L Diesel .................................
250
Electrical System Inspection ..................
253
Air Induction System Inspection ...........
253
Exhaust System Inspection ....................
254
Brake System Inspection .........................
254
Axle Inspection .............................................
257
Steering System Inspection ...................
258
Suspension System Inspection .............
258
Frame and Tow Hook Inspection .........
259
Rear Axle Fluid Check ...............................
259
Spring U-Bolt Check ..................................
259
Vehicle Care
General Information ...................................
261
Cleaning Products .......................................
261
Cleaning the Exterior .................................
262
Waxing ............................................................
263
Cleaning the Engine ...................................
263
Cleaning the Windows and Wiper Blades ........................................................................\
264
Cleaning the Interior ..................................
264
Cleaning the Instrument Panel and Instrument Cluster Lens ......................
265
Repairing Minor Paint Damage .............
265
Cleaning the Wheels .................................
265
Vehicle Storage ...........................................
266
Wheels and Tires
Tire Care .........................................................
268
Using Snow Chains ....................................
283
Changing a Road Wheel ..........................
283
Technical Specifications ..........................
285
Capacities and Specifications
Engine Specifications - 6.7L Diesel ......
286
4
2022 F650750 (TBC) , enUSA, Edition date: 202010, Second-Printing Table of Contents

ENGINE OIL DIPSTICK - 6.7L
DIESEL
Minimum.
A
Nominal.
B
Maximum.
C
ENGINE OIL DIPSTICK - 7.3L Minimum.
A
Nominal.
B
Maximum.
C
ENGINE OIL CHECK - 6.7L
DIESEL
To check the engine oil level consistently
and accurately, do the following: 1.
Make sure the parking brake is on. Make
sure the transmission is in park (P) or
neutral (N).
2. Run engine until it reaches normal operating temperature.
3. Make sure that your vehicle is on level ground.
4. Switch the engine off and wait 15 minutes for the oil to drain into the oil
pan. Checking the engine oil level too
soon after you switch the engine off
may result in an inaccurate reading.
5. Open the hood. See Opening and
Closing the Hood (page 219).
6. Remove the dipstick and wipe it with a clean, lint-free cloth. See
Under
Hood Overview (page 221).
7. Replace the dipstick and remove it again to check the oil level. See
Engine Oil Dipstick
(page 223).
8. Make sure that the oil level is between
the maximum and minimum marks. If
the oil level is at the minimum mark,
add oil immediately. See
Engine Oil
Capacity and Specification (page
290).
9. If the oil level is correct, replace the dipstick and make sure it is fully seated.
Note: Do not remove the dipstick when the
engine is running.
Note: If the oil level is between the
maximum and minimum marks, the oil level
is acceptable. Do not add oil.
Note: The oil consumption of new engines
reaches its normal level after approximately
3,000 mi (5,000 km)
.
Adding Engine Oil WARNING: Do not remove the filler
cap when the engine is running.
223
2022 F650750 (TBC) , enUSA, Edition date: 202010, Second-Printing MaintenanceE249448 E250320

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.
258
2022 F650750 (TBC) , enUSA, Edition date: 202010, Second-Printing Maintenance

2
2-Speed Rear Axle.......................................135
A
A/C See: Climate Control........................................... 85
About This Manual
...........................................7
ABS See: Brakes........................................................... 136
ABS driving hints See: Hints on Driving With Anti-Lock
Brakes................................................................. 137
Accessories......................................................317
Accessories See: Replacement Parts
Recommendation............................................. 17
ACC See: Using Adaptive Cruise Control.............154
Adjusting the Headlamps........................246
Adjusting the Steering Wheel.....................51
Air Brakes
..........................................................141
Air Conditioning See: Climate Control........................................... 85
Air Conditioning System Capacity and Specification - 6.7L Diesel
....................298
Air Conditioning System Capacity and Specification - 7.3L..................................299
Air Filter See: Changing the Engine Air Filter - 6.7L
Diesel.................................................................. 227
See: Changing the Engine Air Filter - 7.3L..................................................................... 229
Air Induction System Inspection............253
Air Suspension
...............................................175
Appendices....................................................345
At a Glance
.......................................................23
Audible Warnings and Indicators.............69
Audio Input Jack............................................314
Audio System...............................................308 General Information......................................... 308
Audio Unit
......................................................308
Autolamps........................................................55
Automatic High Beam Control.................56
Automatic Transmission
............................128
Automatic Transmission Fluid Capacity and Specification
.....................................300 Automatic Transmission Fluid
Check
..............................................................241
Auxiliary Power Points.................................95
Auxiliary Switches.........................................317
Axle Inspection..............................................257
B
Battery See: Changing the 12V Battery..................... 245
Bonnet Lock See: Opening and Closing the Hood...........219
Booster Seats
..................................................32
Brake Fluid Check........................................243
Brake Fluid Specification...........................301
Brakes...............................................................136 General Information.......................................... 136
Brake System Inspection
..........................254
Breaking-In......................................................185
Bulb Specification Chart
..........................290
C
Canceling the Set Speed
............................161
Capacities and Specifications...............286
Car Wash See: Cleaning the Exterior.............................. 262
Catalytic Converter
.......................................116
Changing a Bulb...........................................249
Changing a Fuse...........................................207
Changing a Road Wheel
...........................283
Changing the 12V Battery.........................245
Changing the Engine Air Filter - 6.7L Diesel.............................................................227
Changing the Engine Air Filter - 7.3L.................................................................229
Changing the Engine-Mounted and Diesel Fuel Conditioner Module Fuel
Filters - 6.7L Diesel...................................250
Changing the Engine Oil and Oil Filter...............................................................225
Changing the Wiper Blades
.....................248
Charging a Device..........................................98
Checking the Wiper Blades.....................248
Child Restraint and Seatbelt Maintenance.................................................44
Child Restraint Positioning
.........................34
371
2022 F650750 (TBC) , enUSA, Edition date: 202010, Second-Printing Index