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Draining Fuel/Water Separator Filter (Diesel
Engines)
CAUTION!Do not drain the fuel/water separator filter when the
engine is running. CAUTION!Do not prefill the fuel filter when installing a new
fuel filter. There is a possibility debris could be
introduced into the fuel filter during this action. It is
best to install the filter dry and allow the in-tank lift
pump to prime the fuel system.
NOTE: Care should be taken in disposing of used fluids
from your vehicle. Used fluids, indiscriminately dis-
carded, can present a problem to the environment. Con-
tact your local dealer, service station, or government
agency for advice on recycling programs and for where
used fluids and filters can be properly disposed of in
your area.
Drain a small amount from the fuel/water separator
filter monthly or when the WATER IN FUEL indicator
lamp is on. Turn the drain valve, located on the bottom of410 MAINTAINING YOUR VEHICLE
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the filter, counterclockwise and allow any accumulated
water to drain. Leave the drain valve open until all water
and contaminants have been removed. Close the drain
valve, by turning it clockwise, when clean fuel is visible.
NOTE: The Fuel / Water separator drain valve is
located on the bottom of the fuel filter housing.
If more than a couple ounces of fuel has been drained,
follow the directions below for “Priming if the engine has
run out of fuel.”
WARNING!Do not open the high pressure fuel system with the
engine running. Engine operation causes high fuel
pressure. High pressure fuel spray can cause serious
injury or death. Priming if the engine has run out of fuel
1. Add a substantial quantity of fuel to the tank 5 to 10
gallons (19L to 38L).
2. Crank the engine for 1 to 2 seconds. If the engine does
not start, then release the key or starter button back to the
RUN position (do not turn the key back to the OFF
position). The electric fuel transfer pump will continue to
run and purge air from the system for about 25 seconds.
After 25 seconds, attempt to start the engine again.
3. Start the engine using the Normal Starting Procedure.
4. Repeat the procedure if the engine does not start. MAINTAINING YOUR VEHICLE 411
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Page 412 of 532
CAUTION!Do not engage the starter motor for more than 15
seconds at a time. Allow two minutes between the
cranking intervals.
NOTE: The engine may run rough until the air is forced
from all the fuel lines.
CAUTION!Diesel fuel will damage black top paving surfaces.
Drain the filter into an appropriate container. WARNING!Do not use alcohol or gasoline as a fuel blending
agent. They can be unstable under certain conditions
and be hazardous or explosive when mixed with
diesel fuel.
CAUTION!Due to lack of lubricants in alcohol or gasoline, the
use of these fuels can cause damage to the fuel
system.
NOTE: A maximum blend of 5% biodiesel, meeting
ASTM specification D-6751 may be used with your
Cummins Diesel equipped vehicle. Use of bio-diesel412 MAINTAINING YOUR VEHICLE
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mixture in excess of 5% can negatively impact the on-
engine fuel filter’s ability to separate water from the fuel,
resulting in high pressure fuel system corrosion or dam-
age.
NOTE: As sufficient testing as not been completed,
ethanol blends are not recommended or approved for use
with your Cummins Diesel equipped vehicle.
NOTE: In addition, commercially available fuel addi-
tives are not necessary for the proper operation of your
Cummins Diesel equipped vehicle.
Engine Fuel Filter (Gas Engines)
A plugged fuel filter can cause stalling, limit the speed at
which a vehicle can be driven or cause hard starting.
Should an excessive amount of dirt accumulate in the
fuel tank, frequent filter replacement may be necessary. Spark Plugs (Gas Engines)
Spark plugs must fire properly to assure engine perfor-
mance and emission control. New plugs should be in-
stalled at the specified mileage. The entire set should be
replaced if there is any malfunction due to a faulty spark
plug, malfunctioning spark plugs can damage the cata-
lytic converter. For proper type of replacement spark
plugs, refer to the “Vehicle Emission Control Informa-
tion” label in the engine compartment.
Catalytic Converter (Gas Engines)
The catalytic converter requires the use of unleaded fuel
only. Leaded gasoline will destroy the effectiveness of the
catalyst as an emission control device.
Under normal operating conditions, the catalytic con-
verter will not require maintenance. However, it is im-
portant to keep the engine properly tuned to assure
proper catalyst operation and prevent possible catalyst
damage. MAINTAINING YOUR VEHICLE 413
7
Page 468 of 532
FLUID AND CAPACITIES
U.S. Metric
Fuel (Appoximate)
6.7L HO Turbo Diesel
Engine
Standard Rear Tank 52 gal. 198 L
Optional Midship Tank 22 gal. 85L
Fuel (Appoximate)
5.7L Gas Engine
Standard Rear Tank 52 gal. 197L
Optional Midship Tank 22 gal. 83L
Engine Oil (with filter)
6.7L HO Turbo Diesel
Engine (SAE 15W-40, API
CJ-4 Certified, that meets
CES 20081 Standards.) 12 qts. 11.4L U.S. Metric
5.7L Gas Engine V-8 (SAE
5W-30, API Certified).
For trucks operating un-
der a gross combined
weight rating greater
than 14,000 lbs. 7.0 qts. 6.6L
5.7L Gas Engine V-8 (SAE
5W-20, API Certified).
For trucks operating un-
der a gross combined
weight rating less than
14,000 lbs. 7.0 qts. 6.6L
Cooling System
6.7L Diesel Engine I-6 22.6 qts. 21.4L
5.7L Gas Engine (Mopar
Antifreeze/Coolant 5
Year/100,000 Mile For-
mula) or equivalent 18.7 qts. 17.7L468 MAINTAINING YOUR VEHICLE
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Component Fluids, Lubricants and Genuine Parts
Engine Fuel Filter ( 6.7L Diesel
Engine ) Mopar Fuel Filter, P/N 05183410AA or equivalent. Must meet 7 micron rat-
ing. Using a fuel filter that does not meet the manufacturers filtration and
water separating requirements can severely impact fuel system life and re-
liability.
Crankcase Ventilation Filter ( 6.7L
Diesel Engine ) Mopar CCV Filter, P/N 68001433AA or equivalent.
Fuel Selection ( 5.7L Gas Engine ) 89 Octane, (R=M)/2 Method, Mid-Grade Preferred (87 Octane acceptable).
Fuel Selection ( 6.7L Diesel En-
gine ) Use good quality diesel fuel from a reputable supplier in your vehicle. Fed-
eral law requires that you must fuel this vehicle with Ultra Low Sulfur High-
way Diesel fuel (15 ppm Sulfur maximum) and prohibits the use of Low Sul-
fur Highway Diesel fuel (500 ppm Sulfur maximum) to avoid damage to the
emissions control system. For most year-round service, No. 2 diesel fuel
meeting ASTM specification D-975 Grade S15 will provide good perfor-
mance. If the vehicle is exposed to extreme cold (below 20°F or -7°C), or is
required to operate at colder-than-normal conditions for prolonged periods,
use climatized No. 2 diesel fuel or dilute the No. 2 diesel fuel with 50% No.
1 diesel fuel. This will provide better protection from fuel gelling or wax-
plugging of the fuel filters. This vehicle is fully compatible with biodiesel
blends up to 5% biodiesel meeting ASTM specification D-975.470 MAINTAINING YOUR VEHICLE
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take some washer fluid and apply it to a cloth or towel
and wipe clean the wiper blades, this will help blade
performance.
Once a Month
• Check tire pressure and look for unusual wear or
damage.
• Inspect the batteries and clean and tighten the termi-
nals as required.
• Check the fluid levels of coolant reservoir, brake
master cylinder, and transmission and transfer case (if
equipped), add as needed.
• Check Filter Minder™. Replace air cleaner filter
element if necessary.
• Check all lights and all other electrical items for correct
operation.
• Drain water from the fuel filter. At Each Oil Change
• Change the engine oil filter.
• Inspect the exhaust system.
• Inspect the brake hoses.
• Inspect the U-Joints ( if equipped) and front suspen-
sion components.
• Check the automatic transmission fluid level.
• Check the manual transmission fluid level.
• Check the coolant level, hoses, and clamps.
• Lubricate outer tie rod ends (4X4) models only.
• Lubricate Front Drive Shaft Fitting ( 4X4).
Inspection and service should also be performed anytime
a malfunction is observed or suspected. Retain all re-
ceipts. MAINTENANCE SCHEDULES 475
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Maintenance Schedule
Miles 7,500 15,000 22,500 30,000 37,500
(Kilometers) (12 000) (24 000) (36 000) (48 000) (60 000)
[Months] [6] [12] [18] [24] [30]
Change engine oil and engine oil filter. X X X X X
Lubricate Front Drive Shaft Fitting (4X4). X X X X X
Rotate tires. X X X X X
Check spare tire for proper pressure and correct
stowage. X X XXX
Lubricate outer tie rod ends. X X X X X
Check transfer case fluid level (4X4). X
Change front and rear axle fluid (4X4). X X
Change automatic transmission fluid. X
Replace fuel filter element. X X
Inspect brake linings. X
Inspect and adjust parking brake if necessary. X
Inspect fan hub. X476 MAINTENANCE SCHEDULES
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