Page 189 of 264

Fuel filter replacement - Caterpillar engine
The fuel filter/water separator is
located on the left side of the
engine. Replace the fuel filter/water
separator as recommended in the
general maintenance information
section, or sooner if it becomes
plugged. Vehicles operated on fuel
with more than average impurities
may require replacement of the fuel
filter more frequently. The spin-on
filter has a water drain valve built
into the bottom of the filter canister.
Removal
1. Using an oil filter wrench, remove the filter.
2. Carefully clean the mating surfaces.
Installation
1. Fill the filter with clean, fresh diesel fuel.
2. Coat the filter seal with clean, fresh diesel fuel.
3. Hand-tighten the filter until it seats firmly against the mount, then
tighten (by hand) an additional
1⁄3to1⁄2turn.
4. Start the engine and check for fuel leaks.
Fuel filter replacement - 6.0L Power Stroke engine
Your vehicle is equipped with two fuel filters; one mounted on top of the
engine and the other is mounted inside the frame rail under the
driver-side floorboard near the transmission. Both filters should be
replaced at the same time.
2004 F650/750(f67)
Supplement
USA English(fus)
Maintenance and specifications
189
Page 190 of 264
Removal - Engine-mounted fuel filter
1. Remove the fuel filter cap by
turning counterclockwise.
2. Remove and discard the old fuel
filter element.
3. Carefully clean the mating
surfaces.
Removal - in-line fuel filter
1. Remove the fuel filter cap by
turning counterclockwise.
2. Remove and discard the old fuel
filter element.
3. Carefully clean the mating
surfaces.
Installation-both
The engine will not run properly if the fuel filter is not installed
in housing.
1. Install new fuel filter into the fuel filter housing.
2. Tighten cap onto fuel filter housing slowly, allowing fuel to soak into
the fuel filter element. Tighten cap until it contacts the housing.
2004 F650/750(f67)
Supplement
USA English(fus)
Maintenance and specifications
190
Page 191 of 264

After replacing the fuel filter, the engine will purge the trapped
air as it runs. The engine may run roughly and smoke until the air
is completely eliminated.
Using a fuel which has more than average impurities may require
the fuel filter to be replaced more frequently than the service
interval specifies.
Fuel filter replacement - Cummins B engine
Refer to your engine operator’s manual for service intervals and procedures.
FUEL CONSUMPTION IMPROVEMENT MEASURES
There are two important factors you can control to improve fuel
economy: the mechanical condition of your vehicle and how you drive it.
A properly maintained vehicle will deliver better performance than a
neglected vehicle. Always follow your maintenance schedule to keep your
vehicle in top operating condition.
Also, your driving habits have a significant influence on use of fuel. By
following these suggestions, you can stretch your fuel use:
•Avoid changes in speed as much as possible.
•Anticipate changing traffic conditions. Sudden stops and fast
acceleration waste fuel.
•Avoid extensive idling.
•Do not drive with your foot resting on the brake pedal.
Essentials of good fuel economy
Measuring techniques
Your best source of information about actual fuel economy is you, the
driver. You must gather information as accurately and consistently as
possible. Fuel expense, frequency of fill-ups or fuel gauge readings are
NOT accurate as a measure of fuel economy. We do not recommend
taking fuel economy measurements during the first 1,600 km (1,000
miles) of driving (engine break-in period). You will get a more accurate
measurement after 3,000 km–5,000 km (2,000 miles-3,000 miles).
The advertised fuel capacity of the fuel tank(s) on your vehicle is equal
to the rated refill capacity of the fuel tank(s) as listed inFuel tanksin
this chapter. The advertised capacity is the amount of the Indicated
Capacity and the Empty Reserve combined. Indicated Capacity is the
difference in the amount of fuel in a full tank and a tank when the fuel
gauge indicates empty. Empty Reserve is the small amount of usable fuel
remaining in the fuel tank after the fuel gauge indicates empty.
2004 F650/750(f67)
Supplement
USA English(fus)
Maintenance and specifications
191
Page 252 of 264
6.0 Power Stroke Engine
ComponentMiles (000) 10 20 30 40 50 60 70 80 90 100 110 120
Hours 350 700 1050 1400 1750 2100 2450 2800 3150 3500 3850 4200
Kilometers (000) 16 32 48 64 80 96 112 128 144 160 176 192
Months 6 12 18 24 30 36 42 48 54 60 66 72
Change engine oil and filter
2
••••••••••••
Inspect belt••••••••••••
Clean fuel filter pre-strainer
1
••••••••••••
Change fuel filter
1,5
••••••
Measure air intake restriction
3,4
••••••
Service the cooling system•
Inspect electrical system (A) (Every 12
months, 160,000 km [100,000 miles] or 3,800
hours)•••••(A)•
Pressurize air induction system (every 12
months)••••••
2004 F650/750(f67)
Supplement
USA English(fus)
General maintenance information
252
Page 253 of 264

6.0 Power Stroke Engine
ComponentMiles (000) 130 140 150 160 170 180 190 200 210 220 230 250
Hours 4550 4900 5250 5600 5950 6300 6650 7000 7350 7700 8050 8400
Kilometers (000) 208 224 240 256 272 288 304 320 336 352 368 384
Months 78 84 90 96 102 108 114 120 126 132 138 144
Change engine oil and filter
2
••••••••••••
Inspect belt••••••••••••
Clean fuel filter pre-strainer
1
••••••••••••
Change fuel filter
1,5
••••••
Measure air intake restriction
3,4
••••••
Service the cooling system•••
Inspect electrical system (A) (Every 12
months, 160,000 km [100,000 miles] or 3,800
hours)•••••(A)•
Pressurize air induction system (every 12
months)••••••
1If refueling source is prone to water contamination, also clean the fuel filter pre-strainer.2If fuel is more than 0.05% but less than 1.0% sulfur, change oil at 75% of regular interval. If 1.0%
or higher, change oil at 50% of scheduled interval.3Service air cleaner element as required.4Refer to PCED manual for specification.
2004 F650/750(f67)
Supplement
USA English(fus)
General maintenance information
253
Page 259 of 264

refill capacities ........................218
specifications ..........................207
temperature gauge ...................24
Cruise control
(see Speed control) ....................56
Customer Assistance ........136, 150
Getting assistance outside
the U.S. and Canada ......150–151
Getting roadside assistance ...136
Getting the service you
need .........................................150
Ordering additional owner’s
literature .................................152
D
Daytime running lamps
(see Lamps) ................................45
Defects, reporting .....................153
Defrost ...................................42–43
windshield ...........................42–43
with heating and air
conditioning system .................43
with standard heating
system .......................................42
Doors
lubricant specifications ..........207
Driving under special
conditions
through water ...........................91
E
Emergencies, roadside
jump-starting ..........................143
Emission control system ..193, 223
catalytic converter ..................183
Engine
cleaning ...................................155
lubrication specifications .......207Engine fan .................................174
Engine oil ..................................166
checking and adding ..............166
oil pressure gauge ....................24
recommendations ...................167
refill capacities ........................218
specifications ..........................207
F
Flashers, hazard ........................137
Fuel ............................................184
calculating fuel economy .......191
capacity ...................................219
choosing the right fuel ...........185
filling your vehicle with fuel ..184
filter, specifications ........187, 189
gauge .........................................24
improving fuel economy ........191
running out of fuel ...........87, 186
safety information relating
to automotive fuels ................184
Fuses ..........................................137
G
Gas mileage
(see Fuel economy) .................191
Gauges .........................................24
battery voltage gauge ...............24
engine coolant temperature
gauge .........................................24
engine oil pressure gauge ........24
fuel gauge ..................................24
odometer ...................................24
speedometer .............................24
tachometer ................................24
trip odometer ............................24
2004 F650/750(f67)
Supplement
USA English(fus)
Index
259