2003 FORD SUPER DUTY engine

F-350 Crew Cab Single Rear Wheel Pickup
Engine Rear axle
ratioMaximum GCWR -
kg (lbs.)Maximum
trailer weight -
kg (lbs.)
4x4 with fifth wheel
6.0L All 9072 (20000) 5759 (12700)
F-350 Crew Cab Dual Rear Wheel Pickup
Engine Rear axle
ratioMaximum GCWR -
kg (lbs.)Maximum
trailer weight -
kg (lbs.)
4x2
6.0L All 9072 (20000) 5804 (12800)
4x4
6.0L All 9072 (20000) 5625 (12400)
F-350 Regular Chassis Cab Single Rear Wheel (Fifth Wheel
Towing)
Engine Rear axle
ratioMaximum GCWR -
kg (lbs.)Maximum
trailer weight -
kg (lbs.)
4x2
6.0L All 9072 (20000) 5942 (13100)
4x4
6.0L All 9072 (20000) 5761 (12700)
F-350 Regular Chassis Cab Dual Rear Wheel (Fifth Wheel
Towing)
Engine Rear axle
ratioMaximum GCWR -
kg (lbs.)Maximum
trailer weight -
kg (lbs.)
4x2
6.0L All 9072 (20000) 5759 (12700)
4x4
6.0L All 9072 (20000) 5532 (12200)
Driving tips
18

F-350 SuperCab Chassis Cab Single Rear Wheel (Fifth Wheel
Towing)
Engine Rear axle
ratioMaximum GCWR -
kg (lbs.)Maximum
trailer weight -
kg (lbs.)
4x2 with manual transmission
6.0L All 9072 (20000) 5759 (12700)
4x2 with automatic transmission
6.0L All 9072 (20000) 5804 (12800)
4x4
6.0L All 9072 (20000) 5579 (12300)
F-350 SuperCab Chassis Cab Dual Rear Wheel (Fifth Wheel
Towing)
Engine Rear axle
ratioMaximum GCWR -
kg (lbs.)Maximum
trailer weight -
kg (lbs.)
4x2 with manual transmission
6.0L All 9072 (20000) 5623 (12400)
4x2 with automatic transmission
6.0L All 9072 (20000) 5668 (12500)
4x4 with manual transmission
6.0L All 9072 (20000) 5442 (12000)
4x4 with automatic transmission
6.0L All 9072 (20000) 5487 (12100)
F-350 Crew Cab Chassis Cab Single Rear Wheel (Fifth Wheel
Towing)
Engine Rear axle
ratioMaximum GCWR -
kg (lbs.)Maximum
trailer weight -
kg (lbs.)
4x2 with manual transmission
6.0L All 9072 (20000) 5668 (12500)
4x2 with automatic transmission
6.0L All 9072 (20000) 5715 (12600)
Driving tips
19

F-350 Crew Cab Chassis Cab Single Rear Wheel (Fifth Wheel
Towing)
Engine Rear axle
ratioMaximum GCWR -
kg (lbs.)Maximum
trailer weight -
kg (lbs.)
4x4 with manual transmission
6.0L All 9072 (20000) 5488 (12100)
4x4 with automatic transmission
6.0L All 9072 (20000) 5534 (12200)
F-350 Crew Cab Chassis Cab Dual Rear Wheel (Fifth Wheel
Towing)
Engine Rear axle
ratioMaximum GCWR -
kg (lbs.)Maximum
trailer weight -
kg (lbs.)
4x2 with manual transmission
6.0L All 9072 (20000) 5534 (12200)
4x2 with automatic transmission
6.0L All 9072 (20000) 5579 (12300)
4x4 with manual transmission
6.0L All 9072 (20000) 5306 (11700)
4x4 with automatic transmission
6.0L All 9072 (20000) 5352 (11800)
F-450
Engine Rear axle
ratioMaximum GCWR -
kg (lbs.)Maximum
trailer weight -
kg (lbs.)
Regular Chassis Cab 4x2 with manual transmission
6.0L All 11793 (26000) 8163 (18000)
Regular Chassis Cab 4x2 with automatic transmission
6.0L All 11793 (26000) 8210 (18100)
Regular Chassis Cab 4x4 with manual transmission
6.0L All 11793 (26000) 8027 (17700)
Driving tips
20

F-450
Engine Rear axle
ratioMaximum GCWR -
kg (lbs.)Maximum
trailer weight -
kg (lbs.)
Regular Chassis Cab 4x4 with automatic transmission
6.0L All 11793 (26000) 8074 (17800)
SuperCab Chassis Cab 4x2
6.0L All 11793 (26000) 8029 (17700)
SuperCab Chassis Cab 4x4
6.0L All 11793 (26000) 7847 (17300)
Crew Cab Chassis Cab 4x2
6.0L All 11793 (26000) 7938 (17500)
Crew Cab Chassis Cab 4x4
6.0L All 11793 (26000) 7802 (17200)
F-550
Engine Rear axle
ratioMaximum GCWR -
kg (lbs.)Maximum
trailer weight -
kg (lbs.)
Regular Chassis Cab 4x2
6.0L All 11793 (26000) 8165 (18000)
Regular Chassis Cab 4x4 with manual transmission
6.0L All 11793 (26000) 7981 (17600)
Regular Chassis Cab 4x4 with automatic transmission
6.0L All 11793 (26000) 8029 (17700)
SuperCab Chassis Cab 4x2
6.0L All 11793 (26000) 8029 (17700)
SuperCab Chassis Cab 4x4
6.0L All 11793 (26000) 7802 (17200)
Crew Cab Chassis Cab 4x2 with manual transmission
6.0L All 11793 (26000) 7893 (17400)
Crew Cab Chassis Cab 4x2 with automatic transmission
6.0L 4.88 11793 (26000) 7891 (17400)
Driving tips
21

F-550
Engine Rear axle
ratioMaximum GCWR -
kg (lbs.)Maximum
trailer weight -
kg (lbs.)
6.0L (with
high
capacity
trailer tow
package)4.88 13608 (30000) 9705 (21400)
Crew Cab Chassis Cab 4x4 with manual transmission
6.0L All 11793 (26000) 7709 (17000)
Crew Cab Chassis Cab 4x4 with automatic transmission
6.0L All 11793 (26000) 7756 (17100)
Driving tips
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SCHEDULED MAINTENANCE
The scheduled maintenance services in theScheduled maintenance
guidesection are required because they are considered essential to the
life and performance of your vehicle.
Use only recommended fuel, lubricants, fluids and service parts
conforming to Ford specifications. Motorcraft parts are designed and
built for best performance in your vehicle.
CLEANING THE ENGINE
Engines are more efficient when they are clean because grease and dirt
buildup keep the engine warmer than normal. When washing:
•The engine must be cool to the touch before spraying with water.
•Never spray a hot engine with cold water, as damage to the
engine block or engine components may occur.
•Use caution when using a self-serve power washer (1,000 psi
maximum pressure) to clean the engine, as the high-pressure fluid
could penetrate the sealed parts and cause damage.
•Never apply anything to any exposed belts in the engine
compartment, including the belt dressing.
For general cleaning of the engine and engine compartment, spray
Engine Shampoo (ZC-20) on all parts that require cleaning and pressure
rinse the area with cool water.
Cover the highlighted areas to prevent water damage when cleaning the
engine(never wash or rinse the engine while it is running; water
in the running engine may cause internal damage):
General maintenance information
23

FUEL REQUIREMENTS
The engine is designed to use low sulfur number 1–Dor2–D Diesel fuel
only. At temperatures below -7°C (20°F), number 1–D or winter blend
number 2–D fuel is recommended. (SeeCold weather operationin the
Startingchapter.)
Do not use fuel intended for agricultural use (agricultural fuel is
dyed red), home heating oil or any Diesel fuel not intended for
highway use. Damage to the fuel injection system, engine and
exhaust catalyst can occur if an improper fuel is used.
Do not add gasoline, gasohol or alcohol to Diesel fuel. This
practice creates a serious fire hazard and engine performance
problems.
It should not be necessary to add any aftermarket additives to your fuel
tank if you use a properly formulated Diesel fuel that meets the ASTM D
975 industry specification. Aftermarket additives can damage the injector
system or engine.
Do not blend used engine oil with Diesel fuel under any
circumstances.Blending used oil with the fuel will significantly increase
your vehicle’s exhaust emissions and reduce engine life due to increased
internal wear.
Do not crank the engine for more than 30 seconds at a time as
damage to the starter motor may result.
If the engine fails to start in 30 seconds, turn the key to the OFF
position and wait 30 seconds before trying again.
If air is allowed to enter the fuel system (during fuel filter change or if
you run out of fuel) the engine will purge the trapped air as it runs. The
engine may run rough and produce white smoke while air is in the
system. This is normal and should correct itself in a short time.
An engine that suddenly becomes noisy or operates poorly after a fuel fill
could be using substandard fuel (i.e., high water content, low cetane
rating or gasoline in the fuel). Diesel fuel should be purchased from a
reputable station which sells a large amount of Diesel fuel.
Care should be taken whenever Diesel fuel is stored. Use only clean,
approved containers which will prevent the entry of dirt or water.
General maintenance information
24

Diesel fuel must not be stored in a galvanized container. The fuel will
dissolve the zinc in a galvanized container. The zinc will then remain in
solution until it is run through the engine where it will be deposited in
the fuel injectors causing expensive-to-repair damage.
Diesel fuel dispensing nozzle fill rate
Truck stops have pumps and nozzles designed for larger, heavy-duty
trucks. When refueling at truck stops: if the nozzle shuts off repeatedly
when refueling, wait 5–10 seconds; then use a slower rate of flow (don’t
depress the nozzle trigger as far).
This truck is equipped with a fuel fill pipe which is able to accept fuel up
to 20 gallons per minute from an 1 1/8 inch fuel dispensing nozzle.
Pumping fuel at greater flow rates may result in premature nozzle
shut-off or spitback.
HORIZONTAL FUEL CONDITIONING MODULE (HFCM) (FUEL
FILTER/WATER SEPARATOR)
The vehicle is equipped with a Horizontal Fuel Conditioning Module
(HFCM) located on the frame-rail under the driver-side floorboard near
the transmission.
Water should be drained from the
module assembly whenever the
warning light comes on. The WATER
IN FUEL light will come on when
approximately 100 cc (0.2 pints) of water accumulates in the module.
Replace the fuel filters with Ford Part No. 3C3Z-9N184–CA. This part
number includes filters and seals for both the engine-mounted and
frame-mounted filters.
DRIAINING THE HFCM AND CHANGING THE FUEL FILTERS
Your vehicle is equipped with two fuel filters; one mounted on top of the
engine and the other, the HFCM, mounted inside the frame rail under
the driver-side floorboard near the transmission. Both filters should be
replaced at the same time.
HFCM drain procedure
1. Stop the vehicle andshut offthe engine.
The vehicle must be stopped with the engine off when draining
the HFCM. Fuel may ignite if separator is drained while the
engine is running or vehicle is moving.
General maintenance information
25