Ameer Randolph
If you need to drain the fuel tank of your Bobcat, you're not alone—many people have had to do the same thing, often after accidentally filling their tank with the wrong type of fuel. The process can be a pain, especially if your Bobcat's fuel tank is made of plastic, in which case you may need to siphon or pump the fuel out. If your tank has a drain plug, you can simply loosen the valve and let the gas drain out. If not, you'll have to drain it by removing one of the fuel lines.
How to Drain a Bobcat Fuel Tank
| Characteristics | Values |
|---|---|
| Plug type | Metal or plastic |
| Drain plug location | Bottom of the tank |
| Drain method | Siphoning, pumping, or removing fuel lines |
| Tools required | Vice grips, siphon hose, transfer pump, filter, suction hose, drum, water hose, hand-operated pump device |
| Post-drain procedure | Reassemble machine with new fuel lines, fill the tank, tighten the fuel filler cap, connect the battery ground cable |
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What You'll Learn
Draining a Bobcat 773 fuel tank
To drain a Bobcat 773 fuel tank, you will need to locate the drain plug. According to a Bobcat 753 parts book, the drain plug is located at the bottom of the tank, directly below the fill spout hose. To access the plug, you will need to remove the cover underneath the machine in this location. Once you have located the drain plug, you can remove it by pulling it out with vice grips. Be aware that this may be difficult, especially if the rubber is old and hardened. Alternatively, you can take the line loose on the line coming from the tank and pump it out.
If your Bobcat 773 has a plastic fuel tank, you may need to siphon or pump the fuel out of the tank, as the drain plug may not be accessible. This is because the plastic is too thin to thread, and over-tightening it could result in the need to pull the engine to replace the fuel tank.
In some cases, it may be necessary to completely flush the fuel tank if there is debris or contamination inside. This can be done by setting up a waste pump and a drum, running a water hose into the fuel sending unit hole, and putting the suction hose in the fill neck hole.
Additionally, it is important to identify the correct plug to remove, as the plug for the chain case may be located diagonally opposite to the fuel tank plug.
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Draining a Bobcat S130 fuel tank
Draining the fuel tank of a Bobcat S130 is a straightforward process, but it requires careful attention to detail. Before beginning the process, ensure you have the necessary tools and safety equipment, such as gloves and eye protection. It is also recommended to refer to the Bobcat S130 manual for additional instructions and safety precautions.
To start, locate the fuel tank drain plug. In the Bobcat S130, the drain plug is positioned underneath the tank, just behind the rear axle in the center of the machine. There is no access cover on the underside, so you will need to look for a side entry point. You will find the drain plug just behind the rear axle, in the center. The cover has three 3/8 bolts that can be removed with a 9/16 wrench.
Once you have located the drain plug, the next step is to remove it. The plug is often difficult to remove, especially if the rubber is old and hardened. It is not threaded but rather pushed in, so you will need to use a tool like Vice Grips to grab the metal pin in the middle and pull it out. Be cautious during this step to avoid any spills or accidents.
If your Bobcat S130 has a plastic fuel tank, you may find that the plug is particularly challenging to remove due to the thin plastic construction. Over-tightening the plug can lead to complications, potentially requiring you to pull the engine to replace the fuel tank. Therefore, it is crucial to exercise caution and ensure you are removing the correct plug. The plug for the chain case is diagonally opposite to the fuel tank plug.
In some cases, you may need to siphon or pump the fuel out of the tank if a direct drain is not possible. This process may require additional tools and careful handling of the fuel. Always dispose of the drained fuel responsibly and follow local regulations for fuel disposal.
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Draining a Bobcat 751 fuel tank
Step 1: Prepare the Necessary Tools
Before beginning the drainage process, ensure you have the required tools and equipment. This includes items such as a fuel tank pickup screen kit, a flat-head screwdriver, vice grips, a waste pump, a water hose, a suction hose, a 55-gallon drum, and a camera probe for inspection.
Step 2: Access the Fuel Tank
The fuel tank of the Bobcat 751 is located underneath the engine. To access it, you may need to remove or lift certain parts, such as the inspection plate or the cab, to reach the back of the tank. Be cautious when working around the engine and fuel lines to avoid any accidental damage.
Step 3: Inspect the Fuel Tank
Before proceeding with drainage, it is crucial to inspect the fuel tank for any debris or contaminants. Use a camera probe to thoroughly examine the tank for the presence of sand, dirt, or any other foreign objects. This step is essential to determine if further cleaning or flushing of the tank is necessary.
Step 4: Drain the Fuel Tank
If the tank contains diesel or contaminated fuel, you can drain it by following the steps suggested by other Bobcat 751 owners. One method is to access the inspection plate underneath the machine and drain the tank from there. Alternatively, you can remove the fuel tank plug, which is usually located at the bottom of the tank, by using vice grips to pull it out. Be cautious, as the plug may be difficult to remove, especially if the rubber is old and hardened.
Step 5: Flush the Fuel Tank (If Necessary)
If the inspection reveals significant debris or contaminants in the tank, flushing may be required. Set up a waste pump and a 55-gallon drum. Run a water hose into the fuel sending unit hole and place the suction hose in the fill neck hole. Fill the tank with water while raising and lowering the machine to wash the tank thoroughly. Repeat this process until the tank is clean, and then inspect it again with the camera probe to ensure all debris has been removed.
Step 6: Reassemble and Refuel
Once the tank is drained and cleaned, reassemble the machine by installing new fuel line hoses. Refuel the tank with fresh, uncontaminated fuel, and ensure that the primer is working correctly.
Remember to exercise extreme caution when working with fuel and machinery. Always refer to the Bobcat 751 manual or seek assistance from a qualified technician if you have any doubts or concerns during the drainage process.
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Removing debris from a Bobcat fuel tank
Locate the Drain Plug
The first step is to find the drain plug, which is usually located at the bottom of the fuel tank. Some Bobcat models, such as the 753, have a drain plug directly below the fill spout hose. However, for other models, you might need to refer to the parts catalog or machine serial number to identify the location of the drain plug. It is important to distinguish between the plug for the chain case and the fuel tank plug, as they are positioned diagonally opposite each other.
Prepare for Draining
Before initiating the draining process, it is crucial to have the necessary equipment ready. This includes items such as a waste pump, a drum or container to collect the drained fuel, and a camera probe to inspect the tank for debris. Additionally, you might require tools like Vice grips to remove the drain plug, especially if it is difficult to pull out due to old and hardened rubber.
Drain the Fuel Tank
Once you have located the drain plug and gathered the required tools, you can begin draining the fuel tank. Loosen the valve or remove the plug to let the fuel flow out. If your Bobcat model does not have a drain plug, you will need to drain the tank by removing one of the fuel lines. This could be a rubber hose connected to an electric fuel pump, fuel filter, or a hard fuel line. Remember to place a container underneath to collect the drained fuel.
Flush and Rinse the Tank
After draining the fuel, it is important to flush and rinse the tank to remove any remaining debris. One effective method is to use a water hose and a suction hose. Insert the water hose into the fuel sending unit hole and the suction hose into the fill neck hole. By raising and lowering the machine, you can wash the tank while pumping the water into a drum. Repeat this process until the tank is thoroughly cleaned.
Reassemble and Refuel
Once you have drained, flushed, and inspected the tank to ensure it is free of debris, it's time to reassemble the machine. Reinstall the fuel pump, cover the fuel tank to prevent dust or debris from entering, and then fill the tank with fresh fuel. Finally, reconnect the battery ground cable and start the engine to check for any leaks or issues.
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Using a siphon to drain a Bobcat fuel tank
If your Bobcat fuel tank has a drain plug, it will be located at the lowest point on the tank. Loosen the valve and let the gas drain completely. If your tank doesn't have a drain plug, you can use a siphon to drain the fuel.
To use a siphon to drain a Bobcat fuel tank, you will need a siphon hose, a barrel, and a fuel hose. First, locate the fill spout hose on the Bobcat. The drain plug is directly below this, so remove the cover to access the plug. Then, remove the line loose on the line coming from the tank.
If your Bobcat has a squeeze ball primer, you can take it loose and pump the fuel out. Alternatively, you can use a siphon hose to drain the fuel into a barrel. Secure the siphon hose and insert a fuel hose and air hose into the tank to rinse it out.
Another method is to tip the machine so that there is a bottom corner. Then, use a siphon hose or a transfer pump with a filter on the suction side to drain the fuel. You can also use Willie's "suck bucket" to drain the tank.
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