NHTSA ID Number: 10174401
Manufacturer Communication Number: TSB-20-2105
Summary
Some 2017-2019 F-Super Duty chassis cab vehicles equipped with a 6.7L engine and an aft of axle fuel tank operating in dusty conditions may exhibit a crank/no start concern with the fuel level showing over 1/4 tank full or the fuel gauge only registers up to 1/2 tank after filling with fuel. For vehicles equipped with an auxiliary fuel delivery source, the customer may also experience the inability to deliver fuel using this equipment. This may be due to dirt being trapped around the dust cap on the front or rear rollover valve (ROV) preventing “make-up air” from entering the fuel tank. To correct the condition, follow the Service Procedure steps to replace the fuel tank and possibly also the fuel pump/sender unit.
Model:
2017-2019 F-Super Duty
Engine: 6.7L
Issue: Some 2017-2019 F-Super Duty chassis cab vehicles equipped with a 6.7L engine and an aft of axle fuel tank operating in dusty conditions may exhibit a crank/no start concern with the fuel level showing over 1/4 tank full or the fuel gauge only registers up to 1/2 tank after filling with fuel. For vehicles equipped with an auxiliary fuel delivery source, the customer may also experience the inability to deliver fuel using this equipment. This may be due to dirt being trapped around the dust cap on the front or rear rollover valve preventing make-up air from entering the fuel tank. To correct the condition, follow the Service Procedure steps to replace the fuel tank and possibly also the fuel pump/sender unit. Action: Follow the service procedure steps to correct the condition on vehicles that meet all of the following criteria:
- 2017-2019 F-Super Duty chassis cab only
- 6.7L diesel engine
- Aft of axle fuel tank
- At least one of the following symptoms:
- Crank/no start concern with the fuel level showing over 1/4 tank full
- The fuel gauge only registers up to 1/2 tank after filling with fuel
NOTE: Part quantity refers to the number of that service part number required, which may be different than the number of individual pieces. Service part numbers contain 1 piece unless otherwise stated.
Parts
| Description | Quantity | Part Number | |
| Package Contains 1 Piece, 2 Pieces Required | Fresh Air Tube | 2 | HC3Z-9G297-D |
| – | Fuel Tank, 40 Gallon Single Tank (Aft Of Axle Style Tank) | 1 | HC3Z-9002-V |
| – | Fuel Pump/Sender Unit | 1 | HC3Z-9H307-AJ |
| – | Fuel Pump/Sender Unit O-ring | 1 | 4L3Z-9276-AA
Ford Gasket
Last update on 2026-06-09 / Affiliate links / Images from Amazon Product Advertising API |
Service Procedure
NOTE: The fuel tank will collapse down from the top of the highest portion of the fuel tank as fuel is drawn out and make-up air is not entering the tank.
- Inspect the top of the fuel tank to determine if it is collapsed. (Figure 1)
(1). Access the top of the fuel tank from underneath the vehicle.
(2). Lay a straightedge or a flat piece of wood across the top of the fuel tank and measure the depth of the collapsed portion of the tank.
Figure 1
- Is the tank collapsed down 12 mm (about 1/2 inch) or more with the straight edge laying across the top of the tank?
(1). Yes – proceed to Step 3.
(2). No – this article does not apply. Refer to the Powertrain Control/Emissions Diagnosis (PC/ED) Manual for normal diagnostics.
- Drain and remove the fuel tank. Refer to Workshop Manual (WSM), Section 310-01.
- Remove the fuel pump/sender unit. Refer to WSM, Section 310-01.
- Inspect the fuel pump/sender unit for signs of damage to the guiding rods. Standing the fuel pump and sender unit on a flat surface will help to determine if the guiding rods are bent. The top of the fuel pump and sender unit should be level with the surface it is resting on. Is damage present? (Figures 2-4)
(1). Yes – replace both the fuel pump/sender unit and the fuel tank. Proceed to Step 6.
(2). No – replace the fuel tank only. Proceed to Step 6.
Figure 2
Figure 3
Figure 4
- On the new fuel tank, install a fresh air tube in place of the dust cap on both rollover valves. Tuck the vent tube so it is between the fuel tank shield and the fuel tank. (Figures 5-8)
Figure 5
Figure 6
Figure 7
Figure 8
- Install the original or new fuel pump/sender unit into the fuel tank. Refer to WSM, Section 310-01.
- Install the fuel tank into the vehicle. Refer to WSM, Section 310-01.
12 Affected Products
Vehicles
1 Associated Document
Manufacturer Communications
20-2105
31 March 2020
- EVERYDAY TREATMENT: Keep your diesel engine in top condition with our EDT that is designed to improve performance & maintain engine health. With regular use, you can ensure your engine runs smoothly & efficiently giving you peace of mind on the road.
- BOOST FUEL ECONOMY: Enhance your vehicle performance with our diesel additive that boosts cetane levels by up to 7 points resulting in better fuel economy & reduced maintenance costs. Say goodbye to poor acceleration & frequent trips to the mechanic.
- FUEL INJECTOR CLEANER: Cleans both internal & external injector deposits, enhances the lubricity of fuel to safeguard the fuel system components, such as the pump & injectors to increase engine longevity while also acting as a fuel system cleaner.
- PREVENTS RUST & CORROSION: While demulsifying moisture & adding stability to fuel by preventing oxidation & degradation, it also provides a reliable solution for protecting fuel systems from the damaging effects of rust & corrosion.
- EASY TO USE: Use at every fill-up, 1 oz. or 2oz. (for more cetane and lubricity boost) for every 25 gallons of diesel, this product is easy to use! Just pour it into your diesel fuel tank during your next fill up.
- EVERYDAY TREATMENT: Keep your diesel engine in top condition with our EDT that is designed to improve performance & maintain engine health. With regular use, you can ensure your engine runs smoothly & efficiently giving you peace of mind on the road.
- BOOST FUEL ECONOMY: Enhance your vehicle performance with our diesel additive that boosts cetane levels by up to 7 points resulting in better fuel economy & reduced maintenance costs. Say goodbye to poor acceleration & frequent trips to the mechanic.
- FUEL INJECTOR CLEANER: Cleans both internal & external injector deposits, enhances the lubricity of fuel to safeguard the fuel system components, such as the pump & injectors to increase engine longevity while also acting as a fuel system cleaner.
- PREVENTS RUST & CORROSION: While demulsifying moisture & adding stability to fuel by preventing oxidation & degradation, it also provides a reliable solution for protecting fuel systems from the damaging effects of rust & corrosion.
- EASY TO USE: Use at every fill-up, 1 oz. or 2oz. (for more cetane and lubricity boost) for every 25 gallons of diesel, this product is easy to use! Just pour it into your diesel fuel tank during your next fill up.
- EASY USE AT EVERY FILL-UP: Add directly to the fuel tank at each fill-up. The long neck and measuring chamber make treating fuel simple. One 40 oz bottle treats up to 400 gallons
- FOR ALL DIESEL ENGINES: Suitable for use in all diesel vehicles and equipment - light-duty, heavy-duty, pickup, SUV, van, RV, etc. (including modern HPCR systems)
- IMPROVES LUBRICITY (ASTM D6079): Tested to improve lubricity by 43% to help protect fuel system components, including wear-sensitive parts like the CP4 pump
- BOOSTS CETANE UP TO +8: Raises cetane up to 8 points for faster ignition, smoother combustion, and improved drivability; many engines run best around 48–50 while pump diesel is often 40–45
- CLEANS INJECTORS: AR6500's detergent package removes injector deposits and restores spray patterns for improved atomization, supporting better performance and fuel economy
- Cleans dirty injectors and prevents injector sticking in both High Pressure Common Rail (HPCR) and older systems
- Removes both internal and external deposits on fuel injectors
- Restores lost power and fuel economy
- Contains Slickdiesel Lubricator to protect fuel pumps and injectors from increased wear caused by poor quality Ultra Low Sulfur Diesel (ULSD) fuel
- Effective in all diesel fuels, including ULSD, biodiesel and biodiesel blends
- TWO-STEP FUEL SYSTEM RESET: Includes AR6400-D Diesel Fuel System Cleaner + AR6500 Diesel Treatment (40 oz) for a complete clean-and-maintain solution
- HOW IT WORKS: Use AR6400-D first for a deep clean (12 oz treats 30-40 gallons), then use AR6500 at every fill-up for ongoing protection (40 oz treats up to 400 gallons)
- FOR ALL DIESEL ENGINES: Suitable for all diesel vehicles and equipment, including modern HPCR systems
- CLEANS INJECTORS & RESTORES RESPONSE: Removes injector deposits and restores spray patterns for smoother running, improved response, and more efficient combustion
- IMPROVES LUBRICITY (ASTM D6079): AR6500 is tested to improve lubricity by 43% to protect fuel system components, including wear-sensitive parts like the CP4 pump
Last update on 2026-06-05 / Affiliate links / Images from Amazon Product Advertising API
SEOCONTENT-START
Warranty Status: Eligible under provisions of New Vehicle Limited Warranty (NVLW)/Service Part Warranty (SPW)/Special Service Part (SSP)/Extended Service Plan (ESP) coverage. Limits/policies/prior approvals are not altered by a TSB. NVLW/SPW/SSP/ESP coverage limits are determined by the identified causal part and verified using the OASIS part coverage tool. Labor Times Description Operation No. Time 2017-2019 F-Super Duty Chassis Cab 6.7L: Inspect The Fuel Tank (FAILED) Replace The Fuel Tank Includes Time To Inspect And Replace The Fuel Pump And Sender If Necessary Remove The Dust Cap And Install The Fresh Air Tube On The New Fuel Tank (Do Not Use With Any Other Labor Operations) 202105A 1.5 Hrs. Repair/Claim Coding Causal Part: 9002 Condition Code: 42
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