Bobcat 773 Issues: Common Problems and Solutions

[MikePhua]

Introduction to the Bobcat 773
The Bobcat 773 is a compact skid-steer loader, part of Bobcat's popular 700 series. Known for its power, compact size, and versatility, the 773 is widely used in construction, landscaping, and material handling tasks. However, like any piece of heavy equipment, the Bobcat 773 can experience a variety of mechanical issues over time. This article discusses some of the common problems reported by users, how to diagnose them, and possible solutions.
Common Issues with the Bobcat 773
While the Bobcat 773 is a durable and reliable machine, it can experience certain recurring issues. Here are some of the most commonly reported problems:

1. Hydraulic System Failures: One of the most common issues with the Bobcat 773 is related to its hydraulic system. Operators may experience reduced lift capacity, slow hydraulics, or unresponsive functions. Hydraulic failures can be caused by low fluid levels, hydraulic leaks, or problems with the hydraulic pump.
   
2. Engine Performance Problems: Users have also reported engine-related problems such as rough idling, stalling, or a lack of power. These issues can be due to fuel system malfunctions, clogged air filters, or problems with the engine’s electrical system.
   
3. Drive Motor Issues: The Bobcat 773’s drive motor may also experience issues over time. Problems such as erratic movement, slow speed, or a failure to engage properly can result from wear on the motor, control valves, or hydraulic components.
   
4. Electrical Malfunctions: Electrical issues, such as dead batteries, faulty alternators, or problems with the machine’s ignition system, can also cause trouble for the Bobcat 773. These electrical malfunctions can lead to the machine not starting or losing power during operation.
   
5. Lift Arm Problems: The lift arms of the Bobcat 773 are an essential component of its ability to perform various tasks, including lifting and carrying heavy loads. Over time, the lift arm system can develop problems, such as worn-out lift cylinders, weak hydraulics, or damaged pins.
   
6. Tire Wear and Damage: The 773 is a wheeled skid-steer loader, and tire wear is a common issue. Operators often report that tires wear down quickly, especially in rough terrain or under heavy loads. Uneven tire wear can lead to reduced stability and performance.
   

Diagnosing Bobcat 773 Issues
To troubleshoot the problems effectively, it is essential to follow a systematic approach. Here are the steps to diagnose common issues on the Bobcat 773:

1. Check Hydraulic Fluid Levels: Start by checking the hydraulic fluid levels. Low fluid can cause poor performance in the hydraulic system. Inspect the hydraulic lines for leaks or damage, and ensure that the fluid is clean and free of contaminants.
   
2. Inspect the Engine Components: If engine performance is lacking, start by checking the air filter and fuel filter. A clogged filter can restrict airflow or fuel delivery, causing rough idling or stalling. Check the fuel system for any leaks, and inspect the ignition system for spark issues or faulty wiring.
   
3. Test the Hydraulic Pump and Motor: If the drive motor or lift functions are malfunctioning, test the hydraulic pump and motor for efficiency. If the motor is underperforming, the pump may need to be replaced or serviced. Also, check for any damage to the control valves that could be affecting the hydraulic flow.
   
4. Examine the Electrical System: Check the battery for charge and condition. A weak or dead battery can prevent the machine from starting. Inspect the alternator for proper output, and ensure that all wiring and fuses are intact.
   
5. Inspect the Lift Arm and Cylinders: Look for any visible damage or wear on the lift arm and hydraulic cylinders. If the lift arms are not operating smoothly, check the hydraulic seals and pins for wear. Damaged seals or worn pins can reduce lifting capacity and cause erratic movements.
   
6. Check Tires for Wear: Inspect the tires for signs of excessive wear or damage. Uneven tire wear may indicate a problem with the machine’s alignment or suspension. Regularly check the tire pressure to ensure proper load distribution.
   

Solutions for Bobcat 773 Issues
Once you’ve diagnosed the issue, here are potential solutions for the most common problems with the Bobcat 773:

1. Hydraulic System Repairs: If low fluid is the problem, refill the hydraulic system with the recommended fluid. If there are hydraulic leaks, replace damaged hoses, seals, or fittings. If the hydraulic pump is faulty, it may need to be replaced or rebuilt.
   
2. Engine Maintenance: For engine-related problems, replace the air filter and fuel filter regularly to prevent clogs. Clean or replace the fuel injectors if necessary, and check the fuel lines for blockages. Inspect the ignition system for any issues and replace worn spark plugs or faulty wires.
   
3. Drive Motor Repairs: If the drive motor is malfunctioning, inspect it for wear and damage. If necessary, replace the motor or the hydraulic components that control it. If the control valves are damaged, consider replacing or adjusting them to restore full functionality.
   
4. Electrical System Fixes: If the machine is not starting or experiencing electrical malfunctions, check the battery and alternator. Replace the battery if it is old or damaged, and ensure the alternator is working properly. Inspect the wiring and fuses for any signs of damage or wear.
   
5. Lift Arm and Cylinder Repairs: If the lift arms are not working correctly, replace worn-out pins and seals. If the hydraulic cylinders are leaking or underperforming, rebuild or replace them to restore proper lifting power.
   
6. Tire Replacements: Replace worn tires with new ones to improve stability and performance. Consider using tires designed for heavy-duty applications or specific terrain to reduce wear and increase longevity.
   

Preventive Maintenance for the Bobcat 773
To minimize the occurrence of issues and keep your Bobcat 773 in good condition, preventive maintenance is key. Here are some essential maintenance practices:

1. Regular Fluid Checks: Routinely check the hydraulic fluid, engine oil, and coolant levels. Keeping fluids at proper levels ensures optimal performance and helps prevent damage to the machine’s components.
   
2. Routine Filter Changes: Change the air and fuel filters regularly to prevent blockages and maintain engine efficiency. Clean or replace filters based on operating conditions and manufacturer recommendations.
   
3. Scheduled Inspections: Perform regular inspections of the machine’s hydraulic, electrical, and mechanical systems. Early detection of problems can prevent more significant issues down the road.
   
4. Tire Maintenance: Regularly check the tire pressure and inspect the tires for wear. Rotate the tires periodically to ensure even wear and extend their lifespan.
   
5. Lubrication: Lubricate the moving parts, including the lift arms, pins, and hydraulic components, to prevent premature wear and ensure smooth operation.
   

Conclusion
The Bobcat 773 is a powerful and versatile skid-steer loader, but it is not immune to issues over time. Common problems include hydraulic system failures, engine performance issues, drive motor malfunctions, electrical problems, and tire wear. By following a systematic approach to diagnose the problem and implementing the right solutions, operators can keep their Bobcat 773 running smoothly. Regular preventive maintenance, including fluid checks, filter changes, and component inspections, is crucial for ensuring long-term performance and reliability.