Mercedes Mullins
Bed-mounted fuel tanks, also known as transfer tanks, are designed to hold fuel and fit in the bed of a truck. They are usually constructed of aluminium or steel and are often used by construction companies and farm workers to transport fuel to a job site or field. The size of a truck bed fuel tank generally starts at about 20 gallons and can go up to 100 gallons or more. Bed-mounted fuel tanks can be installed temporarily or permanently. A temporary installation method is easier and only requires a ratchet strap set to secure the tank, while a permanent installation can take about an hour and requires hardware and instructions that come with the tank.
| Characteristics | Values |
|---|---|
| Typical use | Construction companies, farm workers |
| Materials | Aluminum, steel |
| Installation method | Temporary, permanent |
| Size | 20 gallons to 100+ gallons |
| Fuel type | Diesel, gasoline |
| Pump type | Internal, gravity |
| Safety considerations | Clamping force, corrosion, flammability |
| Regulations | DOT approved, state laws |
| Additional features | LED control unit, tool box |
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What You'll Learn
Installation
Bed-mounted auxiliary fuel tanks are a more permanent solution and are used as a secondary source of fuel for the vehicle they are installed in. They are usually constructed of aluminium or steel and are often used by construction companies and farm workers.
When installing a bed-mounted fuel tank, it is important to consider the size of the tank and the material it is made of. The storage capacity of a truck bed fuel tank can range from 20 gallons to over 100 gallons. The tank will be heavier with more capacity for fuel, and it will also be heavier if made of steel rather than aluminium. Steel is less expensive but carries more risk of corrosion, and it is important to consider the payload rating of your truck bed if you will be hauling other items simultaneously.
Most transfer tank users opt for a temporary installation method, which is easier and can be secured with a ratchet strap set. To do this, decide where the tank will fit best in your truck bed, lift it into position, and tighten the ratchet straps using the built-in grooves on the tank and your truck's tie-down points.
If you prefer to install your transfer tank permanently, most tanks will come with the necessary hardware and instructions. Some users have reported using all-aluminium high-strength nuts and bolts, washers, and aluminium spacers between the tank mounting flange and the bed. It is important to ensure that your tank is mounted securely to avoid safety issues in the event of an accident. One user recommends fabricating some rails out of 2" x 1" x 0.188 wall tubing, bolted down using the factory bed bolts into the frame rails. Another user suggests achieving as much clamping force as possible to prevent the tank from ripping through the bed in a collision.
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Safety
Bed-mounted fuel tanks, also known as transfer tanks, are designed to hold fuel and fit in the bed of a truck. They are usually constructed of aluminum or steel and are often used by construction companies and farm workers.
When it comes to safety, there are several important considerations:
Firstly, the weight of the tank and its contents can significantly impact the handling and performance of the vehicle. A full tank can weigh several hundred pounds, so it is crucial to ensure that the truck's bed can support the additional weight, especially if other cargo is also being hauled. This consideration also applies to the choice of tank material—steel tanks are cheaper but heavier, while aluminum tanks are lighter but more expensive.
Secondly, the secure installation of the tank is critical. In the event of an accident, improperly secured tanks can move, rip through the truck bed, and cause additional damage or injury. It is essential to follow manufacturer instructions and utilize proper mounting hardware, such as high-strength nuts, bolts, washers, and spacers. Adequate clamping force is necessary to prevent the tank from breaking free during a collision.
Additionally, the type of fuel and its associated safety regulations must be considered. Diesel fuel is classified as a non-flammable liquid, whereas gasoline is considered flammable, leading to different safety protocols. Some tanks are specifically designed for diesel fuel and may not be suitable for gasoline. It is the user's responsibility to understand the safety requirements for the type of fuel they intend to use.
Furthermore, the transfer of fuel from the bed-mounted tank to the main fuel tank should be done safely. Some users opt for gravity drain systems, while others use pumps and hoses to transfer the fuel. It is important to follow local regulations and guidelines, as some jurisdictions may prohibit certain types of connections or fuel transfer methods.
Lastly, the visibility of the filler cap or neck can impact safety. Some users prefer a discreet design to avoid advertising that they are carrying extra fuel, which may attract unwanted attention or pose security risks.
Overall, while bed-mounted fuel tanks offer convenience and extended range, users must prioritize safety by considering weight distribution, secure installation, fuel type safety regulations, proper fuel transfer methods, and the visibility of the filler cap or neck.
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Regulations
Bed-mounted fuel tanks, also known as auxiliary fuel tanks, are subject to various regulations at both the state and federal levels in the United States. These regulations are in place to ensure the safe and legal use of these fuel systems.
At the federal level, the US Department of Transportation (DOT) plays a significant role in regulating auxiliary fuel tanks. DOT-approved fuel tanks must comply with specific requirements, such as carrying the necessary documentation and adhering to safety standards. However, there is ambiguity regarding the legality of gravity-fed fuel systems, which may violate US DOT regulation 49 CFR 393.67. The National Highway Traffic Safety Administration (NHTSA) and the Federal Motor Vehicle Safety Standards (FMVSS) are also involved in regulating fuel systems.
State-level regulations can vary, and it is essential to refer to the specific laws in your state. For example, in Oklahoma, it is legal to install an auxiliary diesel fuel tank that gravity drains into the main tank, while in other states, direct connections between auxiliary and main tanks may not be permitted.
To ensure compliance, fuel tanks must be clearly and permanently marked with specific information, including the manufacturer's name, manufacture date, gallon size, and a statement indicating that the tank meets FMCSA requirements for non-side-mounted fuel tanks. Additionally, the fuel connections from the auxiliary tank to the primary system must not interfere with the normal functions of the primary system, and all valves and connections must be of an appropriate size to ensure unrestricted fuel flow.
Other safety regulations and guidelines include the requirement for a qualified person to be present during the loading and unloading of refueling tanks, as well as retesting requirements every 2.5 years for such tanks. It is also important to follow proper venting procedures to prevent over-pressurization and to maintain safe distances between filler necks, fuel lines, and heat sources or open flames.
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Tank materials
Bed-mounted auxiliary fuel tanks are available in various materials, including steel, aluminium, and plastic. Each material has its own advantages and considerations:
Steel Tanks
Steel is a common material for fuel tanks due to its strength and durability. Steel tanks can withstand impact and abrasion, making them suitable for off-road or rugged terrain driving conditions. They are also compatible with various fuels, including diesel and gasoline. However, steel is a heavy material, which can add significant weight to the vehicle. Additionally, steel is prone to corrosion, especially when exposed to road salts and other environmental factors, so proper maintenance and coating are necessary to prolong the tank's lifespan.
Aluminium Tanks
Aluminium is another popular choice for bed-mounted fuel tanks. Aluminium tanks are known for their lightweight yet sturdy construction. They offer the advantage of increased fuel capacity without adding excessive weight to the vehicle. Aluminium is also naturally corrosion-resistant, reducing the need for frequent maintenance. However, aluminium tanks may be more susceptible to dents and damage from impact compared to steel tanks.
Plastic Tanks
Plastic fuel tanks, typically made from high-density polyethylene (HDPE), offer several benefits. Plastic is lightweight, impact-resistant, and does not corrode. HDPE is compatible with diesel and gasoline fuels and is less expensive than metal tanks. However, plastic tanks may not be as durable as metal tanks over time, especially when exposed to extreme temperatures or UV radiation.
When choosing the material for a bed-mounted fuel tank, it is essential to consider the intended use, fuel type, and local regulations. Some fuels, such as diesel, have specific safety classifications that dictate the materials and configurations permitted. Additionally, the tank's capacity, weight, and ease of installation or modification should be factored into the decision to ensure compliance and safe operation.
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Tank capacity
The capacity of truck bed fuel tanks can vary, with storage capacities ranging from 20 gallons to over 100 gallons. The size of the tank will depend on the user's needs and the size of their truck bed. For example, a user with a short-bed truck may opt for a 45- to 55-gallon tank, while another with a larger truck bed may choose a 60-gallon tank.
The material of the tank also plays a role in determining capacity. Steel tanks are heavier than aluminum tanks and therefore may reduce the overall payload capacity of the truck. Steel tanks also run the risk of corrosion, which can be avoided with aluminum tanks.
The weight of the tank and fuel should be carefully considered, especially when hauling other cargo. A full 100-gallon tank can weigh up to 800 lbs, and the momentum of this weight in an accident can cause significant damage.
Bed-mounted fuel tanks are often used by construction companies and farmworkers to transport fuel to job sites or fields. They are also used by individuals looking to increase their vehicle's range, allowing them to avoid fuelling at truck stops or buying more expensive fuel.
Some tanks are designed specifically for diesel fuel, while others may be approved for gasoline. It is important to check the regulations and documentation for your area, as some places may have restrictions on the transportation of flammable liquids.
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Frequently asked questions
Bed-mounted fuel tanks are large metal tanks that can be installed in the bed of a truck to increase its fuel capacity.
Bed-mounted fuel tanks can be gravity flow-fed directly into the OEM fill line or wired to a 12-volt internal pump that is connected to a standard fuel dispenser nozzle. The pump can be activated via a toggle switch in the cab.
Bed-mounted fuel tanks are legal, but regulations vary depending on the location and type of fuel. For example, in the United States, the Department of Transportation (DOT) has specific rules regarding the type and amount of fuel that can be carried. Diesel is generally considered less flammable than gasoline and has fewer restrictions.
Bed-mounted fuel tanks can be purchased from various manufacturers, including Transfer Flow, Titan, KSH Marine, ATI, RDS, and Explosafe. Some companies offer custom-made tanks to fit specific vehicles or requirements.
