Rajan Wilcox
John Deere tractor fuel tanks can develop leaks due to rust or damage caused by debris and moisture. Before repairing a leaking fuel tank, it is important to ensure that the tank is empty and free of fuel fumes, which can be explosive. The tank should be cleaned with soap and water or argon gas to remove any remaining fuel, dirt, or rust. Once the tank is clean and dry, the leaking area can be repaired using a sealant or welding, depending on the material of the tank. For metal tanks, a sealant can be applied to the leaking area, while plastic tanks may require welding or the use of a heat gun and filler to melt the plastic and create a permanent repair.
Characteristics and Values Table for Repairing a Leaking Deere Fuel Tank
| Characteristics | Values |
|---|---|
| Fuel tank type | Metal or plastic |
| Common leak areas | Bottom of the tank, fuel line, tank seam, bracket |
| Preparation | Clean tank, remove rust, wash with soap and water, or fill with argon |
| Repair methods | Welding, soldering iron, epoxy, sealants, aftermarket tank |
| Safety considerations | Fuel fumes are explosive, ensure proper ventilation and airing out |
| Tools | Sandpaper, wax and grease remover, primer, heat gun, spot weld cutter |
| Time | Varies depending on sealant work time, curing time, and sanding |
| Cost | Varies, a new OEM tank can be over $700 |
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What You'll Learn
Repairing a plastic tank with epoxy
If your plastic tank has a crack, it is due to its inability to withstand the pressure. In such cases, the tank will need to be drained and replaced. However, if you are looking to repair a plastic tank with epoxy, here is a step-by-step guide:
First, ensure that the tank is cleaned thoroughly. You can use a solvent like acetone to clean the area with the crack. Next, drill two small holes, one at the top and bottom of the crack. This will prevent the crack from growing any larger. Then, sand a groove with an abrasive rotary tool, half an inch parallel to the crack, above and beside it. This groove will allow your polyethylene welding rod to fit in and seal the crack.
Now, you are ready to apply the plastic tank repair epoxy. Follow the instructions that come with the epoxy, including any prescribed temperature requirements. Many epoxies are only suitable for small cracks, so check that your epoxy is suited for the size of the crack and the contents of the tank. Cut the welding rod to a point, and insert it into your plastic welding gun. Touch the epoxy to the top of the crack and apply pressure as per the instructions, pulling the gun down or across to the other end of the crack.
Allow the epoxy to dry for at least an hour. Once it is dry, you can sand it down gently to remove any rough edges and paint over it with plastic paint that matches the rest of the tank. This will make the repaired area invisible and functional again. However, keep in mind that the tank is no longer structurally the same, and this repair may only be temporary.
It is important to note that some users have reported that certain epoxies failed to repair their plastic tanks, so it may be worth considering other repair methods or consulting a professional if you are unsure.
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Replacing the drain valve assembly
To replace the drain valve assembly, you will need to remove the fuel tank and identify the source of the leak. This process can vary depending on the vehicle, but for a John Deere tractor, you will need to remove the radiator support rods, vent line, filler neck, pre-cleaner stack, intake tube, and front side panels to access the fuel tank.
Once the fuel tank is removed, inspect it for any signs of damage or leaks. If the leak is coming from the steel fuel line that connects to the shut-off valve at the bottom of the fuel tank, you will need to replace this line. This may involve cutting or drilling out the old line and welding a new one in place.
If the leak is coming from the drain valve assembly itself, you will need to remove the old assembly and install a new one. This may involve disassembling the valve, cleaning or replacing any damaged parts, and then reassembling it. Make sure to refer to the manufacturer's instructions or a repair manual for specific details on how to replace the drain valve assembly for your particular model.
When reinstalling the fuel tank, ensure that the lower fuel tank strap is in place before placing the tank back into the tractor, as it can be difficult to adjust once the tank is in position. Also, take note of the tank support, as there have been reports of deep pitting in this area, which may require additional repairs or modifications.
Finally, before refilling the fuel tank and starting the engine, inspect all connections and lines for any signs of damage or leaks. Ensure that all components are securely fastened and sealed to prevent future leaks.
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Soldering a leaking nipple
Before soldering, the cable must be cleaned and prepared. Any oily deposits or grease must be removed with a solvent such as Brake Clean, and the cable should be thoroughly dried. The cable should then be cut to the required length, with the strands of the cable turned back and located in the cavity. The cable should be lightly gripped in a vice, and the nipple placed on top. The cable end can then be tapped with a small hammer to splay the strands.
Once the cable is prepared, the soldering can begin. The solder should be heated until it is molten, and then applied to the cable and nipple joint. It is important to ensure that the solder flows into the joint and creates a strong bond. A soldering iron or a propane torch can be used for this process. It may be necessary to hold the soldering iron in place for some time to ensure the solder flows adequately.
After soldering, the cable should be neutralized, and any excess solder can be filed off. It is important to practice good safety measures throughout the process, as overheating the cable can cause it to become stiff and break.
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Using a fuel tank repair kit
To repair a leaking Deere fuel tank, you can use a fuel tank repair kit. There are a variety of kits available, including the POR-15 Fuel Tank Repair Kit, the KREEM Gas Tank Sealer Kit, and the West System kit. Here is a general step-by-step guide on how to use a fuel tank repair kit:
Step 1: Prepare the Tank
Before beginning the repair process, it is important to prepare the fuel tank. This includes removing any old sealants, contaminants, or rust from the tank. Clean the inside of the tank using a mixture of cleaner degreaser and hot water to remove any gum, varnish, or sludge. You may need to use a metal prep solution to dissolve rust and etch the metal for better adhesion. Finally, rinse and dry the tank thoroughly.
Step 2: Mix the Sealer
If your repair kit includes a sealer, mix it according to the manufacturer's instructions. Some sealers may need to be mixed with a specific ratio of water or other liquids. Follow the instructions provided with your repair kit for the best results.
Step 3: Apply the Sealer
Once the tank is clean and dry, carefully apply the sealer to all surfaces that need to be repaired. Ensure that you follow the instructions for the specific repair kit you are using, as application methods may vary. Allow the sealer to dry and cure completely before moving on to the next step.
Step 4: Reassemble the Tank
After the sealer has cured, reassemble the fuel tank by attaching any removed components. Ensure that all connections are secure and tight to prevent future leaks. Refer to the fuel tank's manual or a mechanic if you are unsure about the reassembly process.
Step 5: Test and Maintain
Once the repair is complete, test the fuel tank to ensure that the leak has been fixed. Fill the tank and inspect for any signs of leakage. Additionally, use fuel preservation and stabilizer solutions to maintain your fuel system and prevent future issues, such as stale gas problems. Regular maintenance will help extend the life of your repaired fuel tank.
It is important to carefully follow the instructions provided with your specific fuel tank repair kit, as different kits may have varying processes and components. Always prioritize safety when working with fuel systems and seek professional assistance if you are unsure about any part of the repair process.
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Salvaging a replacement tank
If you are unable to repair your leaking John Deere fuel tank, you may need to replace it. Here are some options for salvaging a replacement tank:
Salvage Yards
Try going to a salvage yard to find a good replacement fuel tank. This option may be suitable if you own a John Deere New Generation tractor, as these tanks are known to suffer from rust due to their age.
Online Forums
Online forums such as My Tractor Forum are a good place to look for replacement parts. Users have mentioned purchasing replacement tanks from eBay and other online sources.
Aftermarket Poly Tanks
You can also purchase an aftermarket poly tank from several suppliers. This option may be suitable if you are unable to find a replacement tank in a salvage yard or online.
Dealerships
Depending on the model of your tractor, you may be able to purchase a replacement tank from a John Deere dealership. However, this option can be fairly expensive.
Local Auto Parts Store
Visit your local auto parts store and ask for a fuel tank repair kit. This option may be suitable if you are comfortable patching the leak in your existing tank. The repair kit comes with fiberglass mesh and a two-part epoxy mix to patch holes in the tank.
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Frequently asked questions
The repair method depends on the type of fuel tank you have. For a plastic tank, you could try using a plastic welder, or replacing it with a new plastic tank. For a steel tank, you could try soldering it, or using a two-part epoxy mix to patch holes. If you are unsure, you can take it to a radiator shop for repair.
Avoid using silicone caulk, JB Weld, and Gorilla epoxy, as these products have been known to fail after a few days.
Leaks are usually caused by water that gets inside the tank and lays on the bottom, causing rust. To prevent this, make sure to clean the tank regularly, and ensure there is something like a nylon mat under the tank to protect it.
