Rajan Wilcox
Putting a bead on a fuel line is a process that involves creating a bulge or flare at the end of a tube to secure a hose and prevent it from slipping off. This is commonly done using specialized tools like the Graham tool or a double flare tool for brake lines, although these tools can be expensive. As an alternative, some people use Dorman repair pieces with Saginaw fittings or double clamps to connect the fuel line, but this may not be the proper way to do it. It's important to ensure a good seal when tightening the fittings to avoid leaks, especially when working with high-pressure fuel lines.
How to put a bead on a fuel line
| Characteristics | Values |
|---|---|
| Tools | Brake line tool, double flare tool, Graham tool |
| Techniques | Using Dorman repair pieces, creating a flare, using Saginaw fittings, using double clamps, using a hose clamp |
| Materials | Steel, rubber, aluminium |
| Concerns | Cost of tools, leaks, hose slipping off |
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What You'll Learn
Using a brake line tool to create a flare on the end of the tube
To create a flare on the end of the tube using a brake line tool, you will need to follow these steps:
First, ensure the end of the pipe is cut square with a tubing cutter to prevent potential leaks. This will provide a perfectly uniform end to the hard line. Then, use a de-burring tool to ensure there are no burrs on the pipe. If your pipe is plastic-covered, remove at least 3mm of the covering from the end to be flared.
Next, chamfer the edge of the pipe according to the tool instructions. Deburr the bore of the pipe, and lubricate the end with grease, brake fluid, or another type of oil. You can now choose the correct punch and die for the size of the tube and the type of flare you will be creating.
Now, you can begin to create the flare. Place the tube in the correct-sized hole on the bar and set the depth of the flare by aligning the edge of the tube with the bubble flare die. Center the forming die on the tube, and insert the bubble flare die into place. By using the "V"-shaped die and aligning it with the bubble flare die and the tube, you will start to turn the "V"-shaped die. The "V"-shaped die will press on the bubble flare die and create a bubble flare. Once the bubble flare is complete, remove the die and form the tube with the "V"-shaped die to create an inverted flare, completing the double flare.
Finally, use the 45° "V" die to create an inverted flare and complete the double flare. Remember to always use a dedicated brake line flaring tool to achieve professional results.
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Using a double flare tool for a neater, more uniform result
Using a double flare tool will give you a neater, more uniform result when beading a fuel line. The first step is to clamp the line into the block with the appropriate stick-out. Next, install the little button deal and flare it down until the button touches the block. Remove the tool, and you'll have a bubble sufficient to hold a hose well.
It is important to note that you should not complete the first step of the double flare process, as this will restrict the diameter of the opening to the tube. Instead, put a little bit on the line so that as long as the line is "stuck" to the clamp, it can't blow off.
If you are using a hydraulic flaring tool, the dies are in those kits to make that type of end. You can also use a brake line double flaring tool, which will keep the end smooth so that it doesn't cut the hose.
For those working with a 5/16" hard line, you can make most of the double flare, and it will look and work fine with no reduction in internal size.
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Dorman repair pieces with Saginaw fittings
To put a bead on a fuel line, there are a few methods you can use. One common approach is to use a double flare tool for brake lines to create a flare or bead on the end of the steel tube. This method may not result in a neat and uniform finish, but it is effective and works in a pinch. Another option is to use a specialised tool to create the bead, but this can be costly. If you're using Dorman repair pieces with Saginaw fittings, here are some detailed steps to help you put a bead on a fuel line:
Firstly, assess the situation and determine the type of fitting you're working with. Dorman repair pieces with Saginaw fittings typically have an 18-inch section, and you'll want to create a bead or flare on the raw steel end to properly connect the rubber hose.
Next, gather the necessary tools and materials. You may already have a flare fitting on your Dorman repair piece, which can be adapted to almost any other fitting. If not, you can use a brake line tool to create a slight flare on the end of the tube, making sure it's not a full flare.
Now, you can slide the rubber hose over the flared end of the tube. Secure it in place with a hose clamp to ensure a tight and leak-proof connection. This method has been used by many without any issues or leaks, so it should provide a reliable solution.
Additionally, Dorman offers a range of OE FIX™ pre-pressed axles and power transfer units that can simplify repairs and minimise downtime. These products come with major components already assembled, making the repair process more accessible and efficient. Remember to consider your specific vehicle's requirements and always follow proper safety procedures when conducting any repairs or modifications.
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Using a Graham tool for 1/4 and 5/16 sizes
Graham Tool Co., Inc. manufactures a small tube beading tool that can be used to put a bead on a fuel line. The tool is designed to work on tubes with an outer diameter of 1/4" to 5/16". It can be used on a variety of materials, including aluminum, copper, steel, and stainless steel.
To use the Graham tool for creating a bead on a fuel line, follow these steps:
- Place the fuel line or tubing securely in a vise or holding tool. Ensure the tubing is cut to the desired length.
- Deburr the inner diameter (I.D.) and outer diameter (O.D.) of the tubing. This process removes any sharp edges or burrs that may be present after cutting.
- Lightly oil the tube. This will help the tool glide smoothly and reduce friction during the beading process.
- Install the Graham tool onto the tubing. Tighten the knob on the tool to secure it in place.
- Begin forming the bead by rotating the tool around the tubing. Gradually tighten the knob after each full 360-degree rotation. This progressive tightening will create a uniform and consistent bead.
It is important to note that the Graham tool is designed for specific tube sizes, and using it on tubing smaller than 1/4" or larger than 5/16" may not yield satisfactory results. Additionally, always follow the manufacturer's instructions and safety guidelines when using any tools or equipment.
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Ensuring the tube doesn't extend too far past the brass olive
When putting a bead on a fuel line, it is important to ensure that the tube does not extend too far past the brass olive. This is because, if the tube extends too far, it can prevent a good seal from forming. The olive may compress onto the tube, but the tube can bottom out in the fitting, causing leakage issues.
To avoid this, it is recommended to leave a small section of the tube before creating the bead. This ensures that the bead is not too close to the end of the tube. A recommended practice is to leave about a 1/4" to 3/8" section before creating the bead. This provides enough space for the hose to fit onto the tube properly.
Additionally, when tightening the fitting, be careful not to exert too much pressure. Excessive pressure can damage the fitting or thread, making it harder to remove or reposition. It is important to find the right balance of tightness to create a watertight seal without warping the pipe or damaging the thread.
Furthermore, when creating the bead, it is common to use a beading tool or a flaring tool. These tools help to form the bead by forcing a small ball bearing (BB) into the wall of the tube. By tightening a screw and turning the brass bushing, a nice bead can be formed. It is also possible to create a partial bubble flare, which increases the diameter of the tube without completing the first step of the double flare process. This helps to ensure that the hose does not get damaged or overly stretched.
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Frequently asked questions
The best tool to use to put a bead on a fuel line is a double flare tool for brake lines. This will allow you to create the end you want, although it may not be as neat and uniform as you would like.
Yes, there is a specific tool for beading fuel lines, although it can be quite expensive. The Graham tool can also be used, but it only works on 5/16 od lines.
It is important to watch how much tube extends past the brass olive before tightening it up. The olive should be compressed onto the tube, but if the tube bottoms out in the fitting, it will prevent a good seal.
There are various types of fuel lines that can be used, including steel, aluminum, and rubber. The choice depends on your specific application and what you have access to.
