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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.
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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.
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.
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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 1,000 miles
(1,600 km) of driving (engine break-in period). You will get a more
accurate measurement after 2,000–3,000 miles (3,000 km–5,000 km).
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.
The amount of Empty Reserve varies and should not be relied
upon to increase driving range. When refueling your vehicle after
the fuel gauge indicates empty, you might not be able to refuel
the full amount of the advertised capacity of the fuel tank due to
the empty reserve still present in the tank.
Filling the tank
For consistent results:
•Use the same fill rate setting (low - medium - high) each time during
filling.
•Allow three automatic click-offs when filling.
•Always use fuel of a known quality, preferably a national brand.
•Have the vehicle loading and distribution the same every time.
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Air conditioner refrigerant - r134a
Lbs. (Kg) Oz.
1.87 (.85) 30
Note:This system uses PAG-type refrigerant oil.
Refrigerant fitting torque
Captured washer nut: 170–190 inch lbs. (19–21 N•m)
Note:This system uses mineral based refrigerant oil to lubricate o-rings
and fittings.
Fuel tanks
Standard tanks are listed as such; all other tanks available for your
vehicle are optional equipment.
Vehicle Tank type Gallsons Liters
F-650 Low Profile
(standard), F-650
Dock HeightSingle, steel
rectangular35 132
F-650 Low Profile,
F-650 Dock Height
(standard), F-750
Pick-up and
Delivery
(standard), F-750
Severe Service
(standard)Single, steel
rectangular45 170
F-650 Dock Height,
F-750 Pick-up and
Delivery, F-750
Severe ServiceSingle, steel
rectangular50 189
F-650–Low Profile,
F-650 Dock Height,
F-750 Pick-up and
Delivery, F-750
Severe ServiceSingle, steel
rectangular65 246
F-650 Dock Height,
F-750 Pick-up and
Delivery, F-750
Severe ServiceSingle, steel D-style 65 246
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Maintenance Operation Frequency - Observation
Check the transmission and
engine mountings (B)Hard shifting or excessive vibration
Check and adjust transmission
controls (B)High effort to shift or noisy
transmission
Check fuel pump pressure Insufficient full-throttle power or
backfiring
Clean radiator cap seal. Clean
and inspect the cap surface on
the radiatorWhen the cap does not hold pressure
Check the battery terminals for
corrosionWhenever electrical power supply has
diminished
Tighten the wheel mounting
nuts to the specified torque.
Refer toServicing your
wheels and tiresRequired initially at 500 and 1000
miles (800 and 1600 km). Perform
again at 500 and 1000 mile (800 and
1600 km) intervals after each tire
removal/replacement.
A - During maintenance and repair, protect the fuel tube and the hose
assemblies, the power steering lines, and the brake lines from the
external heat, the acids and the abrasion that could damage the lines.
B - Check for (free) linkage action and ensure that (return) spring
force is adequate to maintain pedal free play.
C - Adjust, repair or replace as required with the same or equivalent
parts.
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Coolant ......................................174
checking and adding ..............174
refill capacities ........................223
specifications ..........................213
temperature gauge ...................26
Cruise control
(see Speed control) ....................58
Customer Assistance ........139, 154
Getting assistance outside the
U.S. and Canada .............154, 156
Getting roadside assistance ...139
Getting the service you
need .........................................154
Ordering additional owner’s
literature .................................157
D
Daytime running lamps
(see Lamps) ................................47
Defects, reporting .....................157
Defrost ...................................44–45
windshield ...........................44–45
with heating and air
conditioning system .................45
with standard heating
system .......................................44
Doors
lubricant specifications ..........213
Driving under special
conditions
through water ...........................92
E
Emergencies, roadside
jump-starting ..........................147
Emission control system ..199, 228
catalytic converter ..................188Engine
cleaning ...................................159
lubrication specifications .......213
Engine fan .................................178
Engine oil ..................................170
checking and adding ..............170
oil pressure gauge ....................26
recommendations ...................171
refill capacities ........................223
specifications ..........................213
F
Flashers, hazard ........................140
Fuel ............................................189
calculating fuel
economy ..........................196–197
capacity ...................................224
choosing the right fuel ...........190
filling your vehicle with fuel ..189
filter,
specifications ..........191–192, 194
gauge .........................................26
improving fuel
economy ..........................196–197
running out of fuel ...........88, 191
safety information relating to
automotive fuels .....................189
Fuses ..........................................140
G
Gas mileage
(see Fuel economy) .........196–197
Gauges .........................................26
battery voltage gauge ...............26
engine coolant temperature
gauge .........................................26
engine oil pressure gauge ........26
fuel gauge ..................................26
odometer ...................................26
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USA English(fus)
Index
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