The Caterpillar 277B skid steer may encounter various issues during operation, causing it to fail to start or operate properly. Common problems often relate to the electrical system, hydraulic system, or engine. Below is a breakdown of common issues with the Caterpillar 277B and troubleshooting solutions to resolve them.
Problem Description
Users have reported difficulties with starting, electrical system failures, or hydraulic issues with the Caterpillar 277B skid steer. The machine may fail to start or, once started, may operate erratically. These issues may involve multiple systems, and a step-by-step approach is needed for proper diagnosis and resolution.
Common Issues and Solutions

1. Electrical System Failures
   Electrical system failures are among the most common causes of the Caterpillar 277B not functioning properly. First, check the battery voltage to ensure it is fully charged and connections are tight. If the battery voltage is normal, inspect the fuses, relays, and wiring for looseness, corrosion, or damage. Replace any damaged components to restore proper function to the electrical system.
   
2. Hydraulic System Problems
   The hydraulic system is a crucial part of the Caterpillar 277B, and any issues with hydraulic oil pressure or blockages can cause operational problems. Check the hydraulic oil level and quality, ensuring there are no contaminants or impurities. If the hydraulic oil needs to be replaced, do so promptly, and inspect components like the oil pump, valves, and hoses for leaks or damage.
   
3. Engine Issues
   Engine problems may also prevent the Caterpillar 277B from starting or result in unstable operation. Check the engine's starting system and fuel delivery system to ensure fuel is reaching the engine properly. If there are issues with the fuel system, such as a faulty fuel pump or a clogged filter, it could cause starting difficulties or engine failure. Regularly inspect and replace fuel filters to ensure smooth engine operation.
   
4. Sensor and Control System Issues
   The Caterpillar 277B is equipped with various sensors and electronic control systems that, if faulty, can lead to abnormal machine behavior. Inspect the sensors and control systems to ensure proper signal transmission and function. If any sensors are malfunctioning, they may need to be replaced or repaired.
   

A malfunctioning auxiliary hydraulic system on the 2014 Bobcat SR210 skid steer can significantly impact the machine’s versatility, especially when using hydraulic attachments. If the auxiliary hydraulics are not working properly, it can lead to reduced work efficiency and even require downtime for repairs. Based on discussions from the panswork forum, this article summarizes the common causes and troubleshooting steps for auxiliary hydraulic system issues, helping users quickly identify and resolve the problem.
Common Auxiliary Hydraulic Issues

1. No Hydraulic Output: One of the most common problems, typically caused by issues with the hydraulic pump, control valve, or hoses.
   
2. Weak or Unstable Hydraulic Output: The auxiliary hydraulic system might provide insufficient or unstable pressure, often due to poor oil quality, a clogged filter, or worn hydraulic components.
   
3. Hydraulic Attachments Not Working Properly: Sometimes the hydraulic attachments themselves may fail to operate, which could be caused by electrical issues or a mismatch in the control system.
   

1. Check Power and Switches for Auxiliary Hydraulics: Begin by ensuring the skid steer’s power is on, and the auxiliary hydraulic system switch is set correctly. In some cases, the hydraulic system might be turned off or not properly engaged.
   
2. Check Hydraulic Oil Level and Quality: A common cause of hydraulic system failure is insufficient oil or poor oil quality. Check the hydraulic oil level to ensure it’s within the normal range. Also, inspect the oil’s cleanliness and quality. If the oil is contaminated or degraded, it should be replaced with fresh oil.
   
3. Check Hydraulic Filter: Over time, the hydraulic filter may become clogged, leading to insufficient pressure or unstable hydraulic output. Inspect the filter for dirt and debris, and replace or clean it as necessary.
   
4. Inspect the Control Valve and Electrical System: The auxiliary hydraulic system is typically controlled by an electro-hydraulic valve. Check whether the control valve is operating correctly and that the electrical connections are intact. Faulty control valves or poor electrical connections could be causing hydraulic output issues.
   
5. Check the Hydraulic Pump: A malfunctioning hydraulic pump is a common cause of no hydraulic output. Inspect the hydraulic pump’s operational status to ensure it’s working properly. Internal damage to the pump or issues with its drive system could be preventing hydraulic fluid from circulating properly.
   
6. Inspect Hydraulic Hoses and Lines: Check all hydraulic hoses and lines for leaks, kinks, or damage. Damaged hoses can obstruct hydraulic fluid flow, which negatively impacts the system’s performance.
   

• If low oil levels or poor oil quality are identified, replace the hydraulic oil and clean the filter.
  
• If the control valve or electrical system is faulty, repair or replace the relevant components and ensure proper electrical connections.
  
• For hydraulic pump or hose issues, check for damage and replace any faulty components.
  

The Bobcat 773 skid steer experiencing low power issues is often linked to fuel system failures. These problems can result in insufficient engine power, affecting the machine’s performance. Below is a breakdown of common fuel-related causes for low power in the Bobcat 773 and troubleshooting solutions.
Problem Description
Users have reported that their Bobcat 773 skid steer experiences low power, where the engine starts normally but struggles to provide adequate power, especially under heavy load. Upon inspection, the issue appears to be related to the fuel supply system, possibly involving the fuel pump, filter, or other fuel components.
Common Causes and Solutions

1. Check the Fuel Filter
   A clogged fuel filter is one of the most common causes of low power. When the filter becomes clogged with dirt or debris, it restricts the flow of fuel to the engine, causing poor performance. Inspect the fuel filter and replace any that are clogged or damaged. This is the first step in restoring normal power output.
   
2. Fuel Pump Failure
   If the fuel pump is malfunctioning or damaged, it may fail to properly deliver fuel to the engine, resulting in low power. Check if the fuel pump is operating correctly and ensure it is providing a steady fuel supply to the engine. If the pump is faulty, it will need to be replaced or repaired.
   
3. Inspect Fuel Lines
   Fuel line leaks or blockages can also lead to insufficient fuel delivery. Inspect all fuel lines to ensure there are no leaks, cracks, or clogs. If any issues are found, replace or clean the fuel lines to ensure proper fuel flow to the engine.
   
4. Check Fuel Quality
   Poor fuel quality, contamination, or the presence of water can lead to engine instability and low power. If you suspect fuel issues, replace the fuel with high-quality, clean fuel. Also, check the fuel tank for water or sediment, and clean it if necessary.
   
5. Inspect Fuel Filter and Supply System
   Some Bobcat 773 users have reported issues with the fuel supply system’s filters becoming worn or damaged, leading to restricted fuel flow. Regularly inspect the fuel supply system and filters, and replace them when needed to ensure smooth fuel delivery to the engine.
   

In the maintenance of the Bobcat 753 skid steer, display screen malfunctions can prevent operators from accurately reading the machine’s operational status. Common issues with the 1999 model Bobcat 753 display screen include no display, error messages, or malfunctioning features, all of which can affect normal machine operation. Based on discussions from the panswork forum, this article summarizes the common causes and troubleshooting steps for Bobcat 753 display screen issues.
Common Display Screen Issues

1. No Display: One of the most common problems, often caused by power issues, loose connections, or a faulty display screen.
   
2. Error Messages: Sometimes the display will show incorrect codes or messages, making it difficult for the operator to assess the machine's status. This could be linked to sensor malfunctions, control module problems, or issues with the electrical system.
   
3. Flickering or Unstable Display: A flickering or unstable display might be the result of voltage irregularities, poor connections, or aging electronic components.
   

1. Check Power Supply and Connections: Begin by ensuring that the Bobcat 753's battery voltage is normal. Low voltage or battery issues can cause the display screen to fail to power on. Inspect the power cables to the display screen, making sure all connections are secure and there are no signs of looseness or corrosion.
   
2. Inspect Fuses: A common reason for display screen failure is a blown fuse. Check the relevant fuses to see if any are damaged. If a fuse is blown, replace it with the appropriate one.
   
3. Inspect the Control Module: If the display screen remains blank, the control module could be faulty. The control module processes data from the sensors and relays it to the display. If it fails, the display screen won’t function. Check the control module’s power supply and wiring, or consider replacing the module if needed.
   
4. Clean and Inspect Display Screen Connectors: If the display is flickering or unstable, there may be poor contact at the connectors. Inspect the display’s plugs and connection ports for dirt or corrosion. Cleaning the connectors and ensuring a good connection can often resolve this issue.
   
5. Check Sensors and Electrical System: If the display shows error messages, inspect the related sensors and electrical system. Faulty sensors can send incorrect data to the display, which results in erroneous messages being shown.
   
6. Software Reset: Sometimes, the issue with the display may be related to software or system settings. Performing a system reset or reboot can help restore normal functionality to the display.
   

Users of the Caterpillar 246D skid steer have reported control system issues that lead to slow or unresponsive machine behavior. These problems are often related to the electrical control system, sensors, or battery. Below are common troubleshooting steps and solutions to help users restore the normal operation of their machines.
Problem Description
In some cases, the Caterpillar 246D skid steer may experience control system failures, leading to unresponsiveness or complete failure of machine controls. The operator’s joystick may not respond as expected, or the machine may have issues starting. Some users have noted that these control system problems could be caused by issues with the electrical control system, sensors, or battery.
Common Causes and Solutions

1. Check the Electrical Control System
   The electrical control system is central to the Caterpillar 246D, managing all machine functions. If the electrical control system fails, it can lead to erratic machine responses. Check the control module to ensure it is functioning properly and verify there are no fault codes or system errors. In some cases, simply disconnecting and reconnecting the power can clear temporary error states and restore normal functionality.
   
2. Inspect Sensors
   Sensor failures are another common cause of control system issues. The Caterpillar 246D is equipped with several sensors that monitor the hydraulic system, engine status, and other critical parameters. If these sensors fail, the control system may not receive the necessary signals to operate correctly. Check the sensor connections for tightness and verify that the sensors are functioning properly.
   
3. Check Battery Voltage and Connections
   Insufficient battery voltage or electrical connection issues can also lead to control system failures. Check the battery voltage to ensure it is within the normal range and verify that the battery terminals are clean and securely connected. Low battery voltage or loose connections may affect the electrical control system, causing delayed or unresponsive actions.
   
4. Examine the Hydraulic System
   The proper functioning of the control system is closely tied to the hydraulic system. If there are issues with the hydraulic system, such as low pressure or contaminated hydraulic fluid, the control system may not operate correctly. Inspect the hydraulic fluid condition and pressure to ensure the hydraulic system is working as expected.
   
5. Reset the System
   After addressing the above issues, try performing a reset. Sometimes, the control system may fail due to temporary faults. Disconnecting the power for a period of time and then restarting the machine may allow the system to automatically reset and resume normal operation.
   

The N844 Shibaura engine, commonly found in New Holland skid steer loaders, is known for its efficient power output and reliability. However, over time, the engine's throttle control system may require adjustment. This article summarizes the steps and considerations for adjusting the governor of the N844 Shibaura engine, based on discussions from the panswork forum, helping users maintain and adjust their engine for optimal performance.
The Importance of Throttle Adjustment for the N844 Shibaura Engine
Throttle adjustment is not just about engine performance—it affects fuel consumption, emission control, and overall work efficiency. If the throttle control system becomes unresponsive or sluggish, it may lead to engine instability, reduced power, and even overheating. For New Holland skid steer owners, regularly checking and adjusting the throttle is crucial for maintaining the machine's performance.
Common Throttle Adjustment Issues

1. Delayed Throttle Response: A slow throttle response can lead to difficulties in engine startup or sluggish acceleration.
   
2. Reduced Engine Power: Imbalances in throttle precision may cause the engine to run at improper RPMs, leading to a lack of power output.
   
3. Unstable Idle Speed: An engine that idles too high or too low may have performance issues, making it harder to work efficiently.
   

1. Preparation: Before making any adjustments, ensure the skid steer is powered off and has cooled down. Gather the necessary tools and consult the equipment’s service manual to understand the throttle control components and adjustment procedures.
   
2. Inspect Throttle Cable or Lever: Check the throttle cable or lever for any looseness, wear, or damage. Ensure that the throttle line is moving smoothly without any binding or kinks.
   
3. Check the Throttle Sensor: The N844 Shibaura engine’s throttle control may also involve sensor feedback. Make sure the sensor is functioning properly and not contaminated or damaged.
   
4. Adjust the Throttle Cable or Lever: Locate the throttle adjustment bolt, and adjust the throttle cable or lever to improve throttle responsiveness and meet the required settings.
   
5. Adjust Maximum Throttle Setting: Use the appropriate tool to adjust the maximum throttle setting, ensuring that the engine runs at the necessary maximum RPM while preventing over-revving that could damage the engine.
   
6. Testing and Inspection: After making the adjustments, restart the engine and check the throttle response. Increase and decrease the throttle to observe the engine’s acceleration, idle speed, and power output. If the engine behaves erratically, further fine-tuning may be required.
   

• Adjust Gradually: Make throttle adjustments gradually and test the engine’s response after each change to avoid over-adjusting and creating new problems.
  
• Secure Connection Components: Ensure that all throttle cables or control linkages are tightly fastened. Loose components can lead to unstable throttle response.
  
• Clean the Throttle Sensor: If throttle response is slow or unstable, check whether the throttle sensor is contaminated with dirt or oil. Cleaning the sensor may help restore proper function.
  
• Refer to the Manufacturer’s Manual: Always follow New Holland or Shibaura’s service manual to perform adjustments correctly and avoid negatively impacting engine performance.
  

After experiencing a fuel pump or fuel filter failure, the Caterpillar 268B skid steer may fail to start. Even though power is reaching the engine start relay, the machine still won't crank. Below are common troubleshooting steps and solutions to resolve this issue.
Problem Description
Following a fuel pump or filter failure, the Caterpillar 268B skid steer fails to start. Although power is being supplied to the engine start relay via the switch, the engine still won't turn over. Users have verified power at the relay by using a jumper wire, confirming that the power is present, yet the machine does not start.
Common Causes and Solutions

1. Check the Fuel System
   The first step is to check the fuel system for proper operation. A faulty fuel pump or clogged filter could prevent fuel from reaching the engine, causing a no-start condition. Ensure that the fuel pump is working correctly and that the fuel filter is not obstructed. If the fuel pump is damaged, it should be replaced, and the fuel filter should be cleaned or replaced as well.
   
2. Inspect the Starter Relay and Wiring
   Even though power reaches the starter relay, it is still possible that the relay or its connections are faulty. Inspect the relay for proper function and check the wiring for corrosion or damage. If issues are found, replacing the relay or repairing the wiring might be necessary.
   
3. Battery and Connections Check
   In some cases, insufficient battery voltage or electrical connection issues can cause the machine not to start. Verify that the battery voltage is within the normal range and that the battery connections are secure. If the battery voltage is low, try charging or replacing the battery and ensure the connections are clean and tight.
   
4. Examine the Engine Starting System
   If the fuel and electrical systems are functioning properly, the next step is to check the engine's starting system. A faulty starter motor or ignition system could also prevent the machine from starting. If issues are found, inspect the starter motor for proper operation and replace it if necessary.
   
5. Reset and Restart the System
   After addressing the issues mentioned above, try disconnecting the power for a few minutes and then restarting the system. In some cases, the system may remain in an error state due to a fault, and a reset can help clear any potential error codes or protective modes.
   

When a skid steer enters limp mode, it typically indicates that the system has detected a fault and activated a protective mechanism to prevent further damage. Many users have experienced this issue but are unsure how to reset the machine. Below are common troubleshooting steps and solutions to help you get your skid steer back to normal operation.
Problem Description
Once in limp mode, the machine is limited to reduced functionality, and users often report that they cannot return the machine to normal operation. While the machine may still start, it won't perform at full speed or capacity. This issue is often related to sensor faults, system errors, or hydraulic problems.
Common Causes and Solutions

1. Check for Fault Codes
   When the skid steer enters limp mode, the first step is to check for any stored fault codes. Sometimes, the system may have stored an unresolved code even if the machine seems to be operating normally. Using a diagnostic tool (like Panswork's diagnostic equipment), you can scan for fault codes and see if there are any issues that need to be addressed.
   
2. Sensor Failures
   Sensor malfunctions are a common cause of limp mode. Skid steers rely on various sensors to monitor critical data, such as hydraulic system pressure and engine status. If any of these sensors fail, the system may incorrectly assume that the machine is at risk and enter limp mode. Inspecting and replacing faulty sensors could resolve the issue.
   
3. Hydraulic System Pressure Issues
   Hydraulic system pressure instability or excessive pressure can also trigger limp mode. It's essential to check the hydraulic pressure sensors and control valves to ensure they are functioning correctly. If any issues are found, repair or replacement of the components may be necessary.
   
4. Battery Voltage Problems
   In some cases, insufficient battery voltage can cause the machine to enter limp mode. Checking the battery voltage and the electrical system is vital. Ensure that the battery is adequately charged and that the voltage is within the required range for the machine to function correctly.
   
5. Resetting the System
   Some users have successfully resolved the issue by powering down the machine and restarting it. Disconnecting the machine's power for a few minutes and then turning it back on may allow the system to clear any errors or faults. The system’s self-diagnostic function may reset the limp mode automatically after the reboot.
   

In heavy equipment maintenance, replacing and maintaining chain case oil is crucial to ensure long-term proper operation. Chain case oil directly impacts the lubrication efficiency of the chain system, its operational performance, and overall lifespan. This article summarizes the steps and considerations for replacing chain case oil, based on discussions from panswork forum.
The Importance of Chain Case Oil
The chain system undergoes tremendous load and friction during operation, and chain case oil acts as a lubricant that helps reduce friction and wear, preventing overheating or damage to the chain. Keeping the chain case oil clean and at the right level not only extends the lifespan of the chain but also improves the overall efficiency of the equipment. If the chain case oil becomes degraded or contaminated, its lubricating properties will decrease, increasing the risk of malfunction.
When to Replace Chain Case Oil
The replacement cycle for chain case oil typically depends on the equipment’s usage, working environment, and the manufacturer's recommendations. Chain case oil should be replaced under the following conditions:

1. Regular Inspection: Regularly check the condition of the chain case oil based on the equipment's user manual. If the oil appears discolored, has visible contaminants, or the oil level is low, it should be replaced promptly.
   
2. After Equipment Malfunctions: If there are issues such as abnormal noises or overheating in the chain system, inspect whether the oil is contaminated or degraded, and replace it if necessary.
   
3. Harsh Working Environments: Equipment operating in high-temperature, dusty, or humid environments may experience faster contamination of the oil, requiring more frequent replacements.
   

1. Preparation: Before replacing the oil, ensure the equipment is turned off and has cooled down. Gather the necessary tools and ensure that the new chain case oil meets the specifications recommended by the manufacturer.
   
2. Draining the Old Oil: Locate the drain plug of the chain case and use the appropriate tools to drain the old oil. Be cautious to avoid spillage and dispose of the waste oil properly.
   
3. Cleaning the Chain Case: After draining the old oil, inspect the chain case for any debris or deposits. If necessary, use a cleaner to remove any contaminants inside the chain case to ensure there is no sludge or foreign material interfering with its operation.
   
4. Filling with New Oil: Once the chain case is clean, refill it with the new chain case oil. The oil level should follow the specifications in the equipment manual. Both overfilling and underfilling can negatively affect the lubrication system.
   
5. Check Oil Level: After filling, start the equipment and let the chain system run for a short while. Then, check the oil level again to ensure it is within the recommended range.
   

In the heavy machinery maintenance field, maintaining and rebuilding hydraulic pumps and motors is crucial to ensuring optimal performance and extending the lifespan of equipment. For the Bobcat M700, the proper functioning of the hydraulic system directly impacts the machine's overall performance. This article summarizes and translates the process of rebuilding the Bobcat M700 hydraulic pump motor, based on discussions from panswork.
Disassembly and Inspection of the Hydraulic Pump Motor
First, ensure that the machine is powered off and all hydraulic oil supply is disconnected before starting the disassembly process. During disassembly, it is important to take note of the position and orientation of each component for reassembly. All parts inside the hydraulic pump motor, including gears, bearings, oil seals, and the pump body, should be thoroughly inspected. Pay special attention to the oil seals and bearings, as their wear and tear directly affect the pump and motor’s performance.
Cleaning and Inspection of the Hydraulic Pump Motor
After disassembly, clean each part carefully to ensure no contaminants remain. Compressed air or cleaning solvents can be used for this task. While cleaning, focus on ensuring that the internal channels of the pump body and the contact surfaces of the components are free of debris, as any obstruction could block the hydraulic flow or cause sealing issues. Inspect all parts for cracks, excessive wear, or deformation, especially the main shaft of the hydraulic pump, to check for imbalance or excessive wear.
Replacement of Hydraulic Pump and Motor Parts
If any parts are found to be excessively worn or damaged during inspection, they should be replaced with new components. For example, if the gears inside the pump body show significant wear, this could reduce the efficiency of the hydraulic system and even lead to failure. When replacing parts, it is important to ensure that all components are of the correct model and specifications to match the original factory equipment, ensuring the new pump motor will function correctly.
Reassembly and Testing of the Hydraulic Pump Motor
After replacing all worn parts, begin the reassembly of the hydraulic pump motor, following the disassembly notes carefully. During reassembly, make sure to lubricate all components to avoid dry friction, which could cause damage. Once reassembled, connect the hydraulic system and perform pressure testing to ensure the hydraulic pump motor’s output pressure is within the required range. If there is any instability or low pressure, further adjustments and inspections are needed.
Testing and Trial Operation
Once all repairs and replacements are completed, the hydraulic pump motor should be tested. Start the machine and observe the performance of the hydraulic system, particularly under heavy load conditions. Ensure that the hydraulic system operates smoothly without oil leakage, abnormal noise, or overheating issues. If the testing results are satisfactory, the hydraulic pump motor rebuild is considered successful.
Conclusion
Rebuilding the hydraulic pump motor for the Bobcat M700 is a process that requires patience and specialized skills. By carefully disassembling, inspecting, cleaning, replacing worn parts, and conducting thorough testing, the equipment’s lifespan can be significantly extended, ensuring efficient hydraulic system operation. If you are unsure of the process, it is recommended to consult a professional technician to handle the rebuild and maintenance work.