Bobcat 773 F-Series Common Issues and Troubleshooting

[MikePhua]

The Bobcat 773 F-Series skid steer loader is a popular and versatile piece of equipment widely used in construction, agriculture, and other industries that require heavy lifting, grading, or material handling. Known for its compact design and maneuverability, the 773 F-Series has earned a reputation as a dependable machine. However, like any piece of machinery, it can experience issues over time, especially when subjected to heavy use or neglect. In this article, we’ll explore some common problems faced by Bobcat 773 F-Series owners and provide troubleshooting steps to address them.
Overview of the Bobcat 773 F-Series
The Bobcat 773 F-Series was part of the Bobcat 700 series, introduced in the late 1990s and manufactured through the early 2000s. It quickly became one of the company's most popular models due to its balance of size, power, and reliability. It is equipped with a 68 horsepower engine, a rated operating capacity of 1,600 pounds, and a tipping load of 3,200 pounds, making it ideal for a range of applications, from landscaping and road construction to lifting and digging.
Key features of the Bobcat 773 F-Series include:

• Hydrostatic drive: Offers smooth, variable-speed control.
  
• Vertical lift path: Maximizes reach and height when lifting materials.
  
• Optional attachments: Compatible with a wide range of attachments, including buckets, forks, and augers.
  

Despite its strengths, the Bobcat 773 F-Series is not immune to the wear and tear associated with continuous use. Owners should be aware of potential problems that could affect performance and efficiency.
Common Issues with the Bobcat 773 F-Series
Over time, certain issues tend to arise more frequently in the Bobcat 773 F-Series. Below, we’ll cover some of the most common problems that owners might encounter, along with possible causes and solutions.
1. Hydraulic Problems and Loss of Power
One of the most commonly reported issues with the Bobcat 773 F-Series is a loss of hydraulic power, which can manifest as sluggish or unresponsive loader arms, slow movement of attachments, or overall reduced performance in the hydraulic system.

• Possible Causes:
  • Hydraulic fluid levels: Low hydraulic fluid can reduce pressure in the system, leading to sluggish performance or complete loss of function.
    
  • Hydraulic filter issues: A clogged or dirty hydraulic filter can restrict fluid flow, leading to overheating or poor hydraulic performance.
    
  • Pump failure: The hydraulic pump, which provides the necessary fluid pressure to the system, may be worn out or damaged.
    
• Solutions:
  • Check fluid levels: Ensure that the hydraulic fluid is at the recommended level and top it off if necessary. Always use the correct type of fluid specified in the owner's manual.
    
  • Replace filters: Inspect the hydraulic filters for debris or blockages and replace them if needed.
    
  • Inspect the pump: If the pump is suspected to be the issue, it may need to be repaired or replaced. Consult with a certified technician for diagnosis.
    

2. Engine and Starting Issues
Another issue commonly reported with the Bobcat 773 F-Series involves engine starting problems, including the engine turning over but not starting, or intermittent power loss while operating.

• Possible Causes:
  • Fuel system issues: A clogged fuel filter, air filter, or fuel lines can prevent proper fuel flow to the engine, causing starting difficulties.
    
  • Electrical problems: A weak or failing battery, corroded connections, or a faulty ignition switch could cause engine starting problems.
    
  • Starter motor failure: Over time, the starter motor can wear out and fail to engage the engine properly.
    
• Solutions:
  • Replace fuel filters: Inspect and replace the fuel and air filters regularly to ensure proper fuel flow.
    
  • Check battery and connections: Clean battery terminals and check the voltage. Replace the battery if it is weak or damaged.
    
  • Inspect the starter motor: If the starter motor is suspected of failing, have it tested and replaced if necessary.
    

3. Drive Motor and Transmission Issues
The Bobcat 773 F-Series relies on a hydrostatic transmission system for movement. Some operators may experience issues with the drive motor or transmission, including erratic movement, loss of power, or difficulty controlling speed.

• Possible Causes:
  • Hydraulic drive motor failure: The drive motor is responsible for converting hydraulic pressure into mechanical motion. If it’s worn or damaged, it can lead to erratic movement.
    
  • Hydraulic fluid contamination: Contaminated hydraulic fluid can damage the transmission and drive motor, leading to poor performance.
    
  • Belt tension issues: Loose or worn drive belts may cause slipping and lead to a loss of power to the wheels.
    
• Solutions:
  • Check hydraulic fluid condition: Inspect the hydraulic fluid for contamination, and replace it if necessary.
    
  • Inspect drive motor: If the motor is suspected to be the issue, it may require repair or replacement.
    
  • Check belts and tension: Ensure that the drive belts are in good condition and properly tensioned to avoid slippage and power loss.
    

4. Overheating
The Bobcat 773 F-Series, like all heavy equipment, can experience overheating issues, particularly if it’s operating under heavy loads or in hot environments. Overheating can cause damage to internal components and lead to engine failure if not addressed.

• Possible Causes:
  • Cooling system failure: A clogged radiator or cooling fan may restrict airflow and cause the engine to overheat.
    
  • Faulty thermostat: A malfunctioning thermostat can cause the engine to run too hot, even if the radiator is functioning properly.
    
  • Heavy-duty operation: Continuous operation under high loads or in extreme temperatures can push the machine’s cooling system beyond its capacity.
    
• Solutions:
  • Inspect the cooling system: Check the radiator, hoses, and cooling fan for blockages or leaks. Clean out any debris that might be restricting airflow.
    
  • Check the thermostat: Replace a faulty thermostat to ensure proper engine temperature regulation.
    
  • Monitor load and operating conditions: Avoid overworking the machine in extreme conditions, and give it time to cool down between heavy tasks.
    

5. Joystick or Control Issues
The Bobcat 773 F-Series is equipped with joystick controls that allow operators to manage the loader’s movement and attachment functions. Over time, these controls can become less responsive, making it difficult to operate the machine efficiently.

• Possible Causes:
  • Control linkage wear: The control linkage or cables may wear down over time, leading to poor or erratic control.
    
  • Hydraulic valve failure: A malfunctioning hydraulic valve can result in unresponsive movement of the arms or attachments.
    
• Solutions:
  • Inspect linkage and cables: Check for any fraying or damage to the control cables and replace them as needed.
    
  • Check hydraulic valves: If a valve is malfunctioning, it may need to be cleaned or replaced to restore proper control.
    

Conclusion
The Bobcat 773 F-Series is a reliable and versatile skid steer loader, but like all heavy equipment, it is prone to wear and tear over time. By being aware of the common issues it faces, such as hydraulic problems, engine difficulties, drive motor issues, overheating, and control malfunctions, operators can take proactive steps to troubleshoot and resolve these issues. Regular maintenance, timely repairs, and proper care can help extend the lifespan of the Bobcat 773 F-Series, ensuring it continues to perform at its best on the job site.