Bobcat 853 Fuel Problems: Troubleshooting and Solutions

[MikePhua]

The Bobcat 853 is a popular skid-steer loader, known for its durability and versatility in construction and agricultural applications. However, like any piece of machinery, it can encounter issues over time. One common problem that many operators face is fuel-related issues. Whether it’s a fuel delivery problem, engine misfire, or clogged fuel filter, these issues can prevent the Bobcat 853 from running smoothly. In this article, we’ll explore the common fuel-related problems with the Bobcat 853, troubleshooting steps, and potential solutions to keep your machine running efficiently.
Common Fuel Problems with Bobcat 853
Fuel-related issues can manifest in several ways on the Bobcat 853. Understanding the symptoms can help you diagnose the problem more effectively. Below are some common fuel problems that can affect the performance of the machine:

1. Engine Stalling or Difficulty Starting
   One of the most noticeable signs of a fuel-related problem is difficulty starting the engine or the engine stalling during operation. This could be caused by a clogged fuel filter, a faulty fuel pump, or issues with fuel lines. If the fuel system is not delivering enough fuel to the engine, it may struggle to run smoothly.
   
2. Low Power or Lack of Acceleration
   If the Bobcat 853 is underperforming or has a noticeable loss of power, it could indicate an issue with the fuel system. A clogged fuel injector or dirty fuel lines can prevent the proper amount of fuel from reaching the engine, leading to poor performance.
   
3. Fuel Leaks
   Fuel leaks can occur from the fuel lines, injector seals, or fuel tank. These leaks are dangerous as they can lead to fire hazards, but they can also affect engine performance by causing fuel starvation.
   
4. Rough Engine Running or Misfire
   If the engine is running rough or misfiring, it could be a sign that the fuel mixture is incorrect. Issues such as a clogged fuel filter or a malfunctioning fuel pump can result in inconsistent fuel delivery, causing the engine to misfire.
   

Troubleshooting Fuel Issues on the Bobcat 853
If your Bobcat 853 is experiencing fuel-related problems, here’s a step-by-step guide to help you troubleshoot the issue:

1. Check the Fuel Filter
   The fuel filter is one of the most common causes of fuel issues. Over time, the filter can become clogged with dirt and debris, restricting fuel flow to the engine. To check the filter, locate it in the fuel line and remove it. Inspect it for any signs of dirt or damage. If it appears dirty or damaged, replace it with a new filter.
   
2. Inspect the Fuel Lines
   Check the fuel lines for any visible signs of wear, cracks, or leaks. If you find any leaks, they will need to be repaired or replaced immediately. Even small cracks or pinholes in the fuel line can cause fuel starvation, leading to engine problems.
   
3. Test the Fuel Pump
   The fuel pump is responsible for drawing fuel from the tank and delivering it to the engine. If the fuel pump is not working correctly, the engine may not receive enough fuel, causing stalling or difficulty starting. To test the fuel pump, check the pressure at the fuel line. If the pressure is low, the pump may need to be replaced.
   
4. Examine the Fuel Injectors
   If the engine is running rough or misfiring, it could be a sign that the fuel injectors are clogged or malfunctioning. Fuel injectors can become clogged over time due to dirt, debris, or poor-quality fuel. Inspect the injectors for any blockages or signs of damage. If the injectors appear to be faulty, they may need to be cleaned or replaced.
   
5. Check for Fuel Contamination
   Contaminated fuel can lead to a range of issues, including poor engine performance and stalling. If you suspect that the fuel has been contaminated, drain the fuel tank and replace it with fresh fuel. Inspect the tank for any signs of rust or debris, and clean it out before refilling.
   
6. Look for Air in the Fuel System
   Air trapped in the fuel system can cause the engine to run poorly or even fail to start. To check for air, inspect the fuel lines and connections for any loose fittings or damaged seals. Bleeding the fuel system may also be necessary to remove any trapped air.
   

Preventive Maintenance for the Fuel System
Preventing fuel issues in the Bobcat 853 is often easier than troubleshooting and repairing problems after they occur. Regular maintenance can help extend the life of the fuel system and keep the machine running efficiently. Here are some tips for preventive maintenance:

1. Regularly Replace the Fuel Filter
   Make it a habit to replace the fuel filter every 500-1,000 hours of operation, or as recommended by the manufacturer. A clean filter ensures proper fuel flow and prevents contaminants from entering the engine.
   
2. Use Clean, Quality Fuel
   Always use clean, high-quality fuel from reputable sources. Contaminated fuel can cause significant damage to the fuel system, including clogging the injectors and damaging the fuel pump.
   
3. Inspect Fuel Lines Regularly
   Regularly inspect the fuel lines for signs of wear, cracking, or leaks. Fuel lines can deteriorate over time, so replacing old or damaged lines before they fail can save you from more expensive repairs.
   
4. Check for Water in the Fuel
   Water in the fuel is a common cause of engine performance problems. It can enter the fuel system through condensation or when refueling from contaminated sources. If you notice water in the fuel, use a water separator or fuel treatment to remove it.
   

Real-Life Example: Fuel Problems in a Bobcat 853
A Bobcat 853 owner experienced intermittent stalling and poor acceleration during a large construction project. After several attempts to start the machine, the engine would stall after a few minutes of operation. Upon inspection, the fuel filter was found to be heavily clogged, reducing fuel flow to the engine. The owner replaced the fuel filter, and the machine returned to normal operation.
However, another issue arose after a few days: the machine began losing power during operation. The cause turned out to be a worn-out fuel pump that wasn’t supplying enough pressure. After replacing the pump, the machine was running smoothly again, and the project was able to continue without further delays.
Conclusion
Fuel problems in the Bobcat 853 can be frustrating, but with a little troubleshooting and regular maintenance, they can be managed effectively. From clogged fuel filters to malfunctioning fuel pumps, most fuel-related issues can be identified and repaired with the right tools and knowledge. By performing regular maintenance, using quality fuel, and staying on top of inspections, you can help prevent fuel issues and keep your Bobcat 853 running at peak performance. If problems persist or if you’re unsure about the diagnosis, it’s always best to consult with a professional mechanic or technician for further assistance.