Mercedes Mullins
If your Bobcat 553 won't start, you may need to replace the fuel filter and pickup line in the tank. This is a relatively simple process, but there are a few things to keep in mind. First, check the fuel lines for any kinks, damage, or obstructions. Next, verify that fuel is reaching the injection pump by disconnecting the fuel line and cranking the engine. If there is no fuel flow, there may be an issue with the fuel lift pump or a clog in the system. It's also important to bleed the fuel system to remove any trapped air. Additionally, make sure to check the water separator bowl and only drain it when necessary. When replacing the fuel filter, be sure to clean the pre-filter and area, move the hose clamps, and remove each fuel hose. Finally, install a new pre-filter with the arrow facing the correct direction and prime the system to remove any air.
| Characteristics | Values |
|---|---|
| Check | Water separator bowl |
| Drain | When water is visible, when notified by the 'water in fuel' code, and at every fuel filter replacement |
| Install | An extra hose then loosen the drain |
| Disconnect | The electrical connector and remove the separator bowl |
| Remove | The filter |
| Do not | Pre-fill a new filter with fuel |
| Lubricate | The new O-rings |
| Install | The separator bowl before installing onto the filter housing |
| Connect | The electrical |
| Perform | Any final cleanup |
| Prime | The fuel system with fuel and remove air from the system |
| Clean | The pre-filter and area |
| Move | The hose clamps off |
| Remove | Each fuel hose and loosen the filter clamp |
| Note | The orientation of the arrow on the pre-filter before removing and discarding it |
| Install | The new pre-filter with the arrow facing the correct direction |
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What You'll Learn
How to check the fuel lines
To check the fuel lines of a Bobcat 553, you should first ensure that the lines are not kinked, damaged or obstructed. If there are any leaks, this could prevent fuel from reaching the engine. You can also disconnect the fuel line from the injection pump and crank the engine to see if fuel is flowing. If not, there may be an issue with the fuel lift pump or a clog in the system.
To check for clogs, you can bleed the fuel system. Even if you have already bled the fuel filter, there may still be air trapped in the fuel system.
You should also check the water separator bowl. If there is water visible, or if you are notified by a 'water in fuel' code, you should drain the bowl. You should also do this at every fuel filter replacement.
If you are replacing the fuel filter, you will need to prime the pre-filter and remove air from the system. You should also check for a fuel tank vent or breather cap that vents excess pressure. Replace this with a new genuine Bobcat part.
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How to verify fuel flow
To verify fuel flow, confirm that fuel is reaching the injection pump. You can do this by disconnecting the fuel line from the injection pump and cranking the engine to see if fuel is flowing. If not, there may be an issue with the fuel lift pump or a clog in the system.
To replace the fuel filter on a Bobcat 553, you should first check the water separator bowl. If there is water visible, or if you have been notified by a 'water in fuel' code, drain the bowl. You should also drain the bowl at every fuel filter replacement. Disconnect the electrical connector and remove the separator bowl. Remove the filter. Do not pre-fill a new filter with fuel. Lubricate the new O-rings. Install the separator bowl before installing onto the filter housing. Connect the electrical. Perform any final cleanup. The fuel system will need to be primed with fuel and air removed from the system.
You should also clean the pre-filter and area. Move the hose clamps off. Remove each fuel hose and loosen the filter clamp. Note the orientation of the arrow on the pre-filter before removing and discarding it. Install the new pre-filter with the arrow facing the correct direction.
Your machine may also have a fuel tank vent or breather cap that vents excess pressure. Replace with a new genuine Bobcat part.
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How to bleed the fuel system
To bleed the fuel system of a Bobcat 553, you will need to ensure that the fuel lines are not kinked, damaged or obstructed. If there are any leaks, it could prevent fuel from reaching the engine. You should also check that fuel is reaching the injection pump. To do this, disconnect the fuel line from the injection pump and crank the engine to see if fuel is flowing. If not, there may be an issue with the fuel lift pump or a clog in the system.
Even if you have bled the fuel filter, there may still be air trapped in the fuel system. To remove this air, you will need to prime the pre-filter. To do this, clean the pre-filter and area, then move the hose clamps off. Remove each fuel hose and loosen the filter clamp. Note the orientation of the arrow on the pre-filter before removing and discarding it. Then, install the new pre-filter with the arrow facing the correct direction.
You should also check the water separator bowl. Only drain when water is visible or when notified by the ‘water in fuel’ code and at every fuel filter replacement. Install an extra hose then loosen the drain.
Finally, make sure that you do not pre-fill a new filter with fuel. Lubricate the new O-rings. Install the separator bowl before installing onto the filter housing. Connect the electrical. Perform any final cleanup.
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How to clean the pre-filter
To clean the pre-filter of a Bobcat 553, you will need to move the hose clamps off and remove each fuel hose. Loosen the filter clamp and note the orientation of the arrow on the pre-filter before removing and discarding it. You can then install a new pre-filter, ensuring that the arrow is facing the correct direction.
It is recommended that you replace the fuel filter every 1,000 hours or annually. When you do so, the pre-filter will need to be primed and air removed from the system. You can do this by disconnecting the electrical connector and removing the separator bowl.
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How to check the water separator bowl
To check the water separator bowl, you should first drain it when water is visible or when you get a 'water in fuel' code. You should also drain it every time you replace the fuel filter. Install an extra hose and then loosen the drain. Disconnect the electrical connector and remove the separator bowl. Remove the filter. Do not pre-fill a new filter with fuel. Lubricate the new O-rings. Install the separator bowl before installing onto the filter housing. Connect the electrical. Perform any final cleanup. The fuel system will need to be primed with fuel and air removed from the system.
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Frequently asked questions
You will need to clean the pre-filter and area, move the hose clamps off, remove each fuel hose and loosen the filter clamp. Then, install the new pre-filter with the arrow facing the correct direction.
You will need to prime the pre-filter and remove air from the system. You should also check the water separator bowl and drain it if there is water visible, or if you are notified by the 'water in fuel' code.
Check the fuel lines to ensure they are not kinked, damaged or obstructed. You should also check that fuel is reaching the injection pump.
