On the panswork forum, a user reported an issue with their Bobcat T770, where the equipment displayed "AUX NO COM" and "MAIN NO COM" codes, indicating a loss of communication between the auxiliary and main control systems. This issue led to the machine being unable to function properly. Here is a summary of the problem, its possible causes, and potential solutions.
Problem Description
The user noticed that when operating the Bobcat T770, the display showed “AUX NO COM” and “MAIN NO COM” codes, meaning there was no communication between the auxiliary control system and the main control system. This typically points to a communication breakdown within the machine's electronic control systems, which affects its functions and operation.
Possible Causes

1. Communication Line Fault
   The most common cause of communication failure is a fault in the communication lines. There may be a broken, loose, or interfered connection between the control modules and the equipment. Poor or damaged connections can result in communication failure, triggering the error codes.
   
2. Low Battery Voltage
   Low battery voltage or insufficient power can cause the equipment's electrical control system to malfunction, which can lead to communication failure. If the voltage is unstable, it will affect the control system's operation, causing the "no communication" error.
   
3. Faulty Control Module
   If the main control module (ECM) or the auxiliary control module (AUX ECM) in the Bobcat T770 fails, it can result in a communication breakdown. A damaged or malfunctioning control module may not be able to exchange data with other systems, leading to the “no communication” error codes.
   
4. Software or Firmware Issues
   In some cases, incorrect software or firmware updates can cause issues with the control system's operation. Incompatible versions or incorrect system configurations might disrupt communication.
   
5. Sensor or Connector Issues
   Sometimes, a sensor or connector issue in the control system can cause communication failure. If a sensor stops working or a connector becomes loose, it can affect the signal transmission, leading to the communication error.
   

1. Inspect Communication Lines and Connections
   First, check all communication lines between the main control module and the auxiliary control module. Ensure that the cables are securely connected and free from corrosion or damage. If there are any issues with the lines, repair or replace them as needed.
   
2. Check Battery Voltage and Power Supply
   Measure the battery voltage to ensure it is sufficient. If the voltage is too low, charge the battery or replace it. Ensure that the power supply system is stable to prevent voltage fluctuations from affecting the equipment’s performance.
   
3. Check the Control Modules
   If the communication lines and battery are fine, inspect the main and auxiliary control modules. Use a diagnostic tool to read the fault codes from the control modules and check for any hardware issues. If a module is found to be faulty, it may need to be replaced or repaired.
   
4. Update Software and Firmware
   If the issue is related to software or firmware, try reinstalling or updating the software and firmware of the control system. Ensure that all system versions and configurations are compatible with the machine.
   
5. Check Sensors and Connectors
   Inspect all sensors and connectors in the control system to ensure they are not damaged, loose, or corroded. If any issues are found, clean or replace the faulty components.
   

In the process of repairs and troubleshooting, wiring diagrams are crucial for accurately locating issues. For the CAT 246B skid steer, many users rely on wiring diagrams when dealing with electrical system failures. This article discusses a user’s request for a wiring diagram and the solutions available to obtain it.
Problem Description
A user encountered an electrical system issue with their CAT 246B skid steer and needed the wiring diagram to diagnose the problem accurately. Due to the complexity of the electrical system, having a detailed wiring diagram is essential for troubleshooting and repair. The user could not find the appropriate wiring diagram and turned to the forum for assistance.
Solutions

1. Obtain the Official Service Manual
   CAT offers comprehensive service manuals that include wiring diagrams and troubleshooting guides. Users can obtain these manuals through the CAT website or authorized dealers, which contain detailed electrical system diagrams for the equipment.
   
2. Online Resources and Community Assistance
   In addition to official manuals, various third-party websites and forums, such as Heavy Equipment Forums, provide wiring diagrams and repair manuals for different machines. Users can seek help from other experienced repair professionals or access shared resources on these platforms.
   
3. Contact Dealers or Service Centers
   If users are unable to find suitable wiring diagrams online, contacting a local CAT dealer or service center is another effective route. These service centers usually offer technical support and can provide the required wiring diagrams to assist users with their repairs.
   
4. Use Diagnostic Tools for Troubleshooting
   In addition to wiring diagrams, modern skid steers are equipped with diagnostic tools. Users can utilize these tools to perform a full electrical system check and diagnose potential faults. These professional diagnostic tools can help quickly pinpoint electrical issues, reducing repair time.
   

On the panswork forum, users have reported issues related to the fuel injection pump solenoid in their Case 440 machines. The solenoid plays a crucial role in controlling the fuel flow to the engine, and if it fails, it can lead to engine performance problems. Below is a summary of the issue, its potential causes, and solutions.
Problem Description
Users are experiencing problems with the fuel injection pump solenoid in their Case 440 equipment. The solenoid is an important component of the fuel system as it regulates the flow of fuel to the engine. If it malfunctions, the engine may fail to start, run rough, or have inconsistent power delivery.
Possible Causes of the Issue

1. Faulty Fuel Injection Solenoid
   The most common cause of the issue is a faulty fuel injection solenoid itself. If the solenoid is defective or worn out, it may not properly control the fuel flow, leading to engine starting issues or erratic engine performance.
   
2. Wiring or Connection Problems
   Electrical wiring or connections that are loose, corroded, or damaged can disrupt the signal to the solenoid. This can prevent the solenoid from receiving the necessary power to operate properly.
   
3. Fuel Contamination
   Contaminants in the fuel, such as dirt or water, can clog the solenoid or cause it to malfunction. This can result in poor engine performance or difficulty starting the engine.
   
4. Low Battery Voltage
   A weak or discharged battery may not provide enough power to the solenoid to activate it properly. This could lead to a failure to start or inconsistent engine behavior.
   
5. Faulty Fuel Injection Pump
   Sometimes, the issue may lie with the entire fuel injection pump rather than just the solenoid. A damaged or malfunctioning pump can affect the performance of the solenoid and cause similar symptoms.
   

1. Inspect and Replace the Fuel Injection Solenoid
   Begin by inspecting the fuel injection solenoid for visible signs of wear or damage. If the solenoid is defective, it will need to be replaced. Replacing the solenoid can often resolve starting and performance issues.
   
2. Check Wiring and Connections
   Inspect all electrical connections leading to the solenoid. Look for any loose, corroded, or damaged wires that may be preventing proper power flow. Clean and repair any faulty connections.
   
3. Flush the Fuel System
   If fuel contamination is suspected, flush the fuel system to remove any dirt or water. Replacing the fuel filter and cleaning the fuel lines can help prevent further issues and ensure the solenoid receives clean fuel.
   
4. Test and Charge the Battery
   Check the battery’s charge and ensure it is providing the proper voltage. If the battery is weak, recharge or replace it to ensure there is enough power for the solenoid to function.
   
5. Inspect the Fuel Injection Pump
   If the solenoid and related components appear to be in good condition, but the issue persists, the fuel injection pump may need to be inspected and repaired or replaced.
   

On the panswork forum, several users have reported issues with their equipment's fan not turning on, which can lead to overheating if the machine's cooling system isn't functioning properly. Below are some potential causes and solutions for the problem.
Problem Description
Users have noted that their fans fail to start, which can cause poor cooling of the engine, leading to overheating. Typically, the fan should activate when the engine temperature rises to help lower the temperature and prevent the machine from overheating.
Potential Causes

1. Faulty Fan Relay
   The fan relay is responsible for sending the signal to turn the fan on. If the relay malfunctions, the fan will not receive the signal to start, causing the issue.
   
2. Electrical Circuit Problems
   Issues such as a broken wire, loose connections, or damaged cables in the fan circuit can prevent electrical current from reaching the fan, which will stop it from functioning.
   
3. Faulty Temperature Sensor
   If the temperature sensor is faulty, the machine may not be able to detect the engine temperature properly, meaning it won't trigger the fan to turn on. This can prevent the fan from operating as needed.
   
4. Fan Motor Failure
   The fan motor itself could be worn out or damaged, preventing it from turning on. A faulty fan motor may need to be replaced.
   
5. Blown Fuse
   A blown fuse in the fan circuit could also cause the fan to stop working. Fuses can blow if there is an electrical surge or overcurrent, and replacing the blown fuse is necessary.
   

1. Check and Replace the Fan Relay
   Start by checking the fan relay to see if it's functioning properly. Use a multimeter to test the relay's operation. If it is defective, replace the relay.
   
2. Inspect Electrical Connections
   Inspect the fan circuit for any loose or damaged connections. Clean or tighten the connections as necessary, and replace any worn-out cables.
   
3. Check the Temperature Sensor
   Test the temperature sensor to ensure it's working correctly. Use diagnostic tools to check the sensor's output. If the sensor is faulty, replace it with a new one.
   
4. Inspect the Fan Motor
   Check if the fan motor is functioning properly. If the motor is not starting or making unusual noises, it may need to be replaced.
   
5. Check and Replace the Fuse
   If the fuse in the fan circuit is blown, replace it with a new fuse of the same amperage rating. Ensure the new fuse is of the correct type for the circuit.
   

Skid steers are essential pieces of equipment on job sites, but like any machinery, they can experience startup issues. This article discusses a case where the CAT 289D skid steer failed to turn over and provides an analysis of possible causes and solutions.
Problem Description
The user experienced an issue where their CAT 289D skid steer failed to start. Despite the battery and power systems appearing to be in good condition, the engine did not respond when the user attempted to start the machine. The issue was preventing the machine from completing the startup process and getting to work.
Possible Causes

1. Battery Issues
   Although the battery seems fine, there may be internal faults or it may not be providing enough current for the startup. Low voltage or a worn-out battery can cause the machine to fail to start.
   
2. Starter Motor Failure
   The starter motor is a crucial component of the startup system. If the starter motor is malfunctioning, the engine will not be able to start. It's important to check the motor’s connections and ensure it’s not damaged.
   
3. Starter Relay or Fuse Problems
   If the starter relay or associated fuses are faulty, the skid steer may not start. It’s important to check all the related relays and fuses to confirm they are working properly.
   
4. Wiring Issues
   Loose or damaged wiring can prevent electrical current from flowing properly, affecting the startup system. Check all electrical connections, wires, and terminals to ensure they are secure and free of corrosion.
   
5. Sensor or Control Module Failure
   Modern equipment relies on sensors and electronic control modules. A fault in any sensor can prevent the machine from starting. Specifically, issues with the Engine Control Module (ECM) can prevent the startup process.
   

1. Check Battery Voltage
   Begin by checking the battery voltage to ensure it's sufficient. If the battery voltage is low, try charging it or replacing the battery.
   
2. Inspect the Starter Motor
   Examine the starter motor and its electrical connections to ensure they are secure and undamaged. If the starter motor is faulty, it may need to be repaired or replaced.
   
3. Inspect Starter Relay and Fuses
   Check the starter relay and fuses to ensure they are functioning properly. Replace any damaged relays or fuses.
   
4. Check Wiring
   Inspect all wiring connections for looseness, corrosion, or wear. Clean the terminals and reconnect all wires securely to ensure proper electrical flow.
   
5. Check Sensors and Control Modules
   Use a diagnostic tool to check the condition of the sensors and control modules. If the ECM or other sensors are faulty, recalibration or replacement may be necessary.
   

On the panswork forum, some users have reported slow and jerky uplift and uptilt movements on their 2017 Bobcat S70 skid steer loader. This issue is often related to the hydraulic system’s efficiency and condition. Below is a summary of possible causes and solutions to help operators quickly troubleshoot and resolve the problem.
Problem Description
Users have noted that the 2017 Bobcat S70 skid steer loader exhibits very slow and uneven uplift and uptilt movements. These movements not only lack speed but also show noticeable jerking, which affects overall work efficiency.
Possible Causes

1. Low Hydraulic Oil Temperature or Poor Oil Quality
   Hydraulic oil that is too cold or degraded can result in poor system performance. Cold oil thickens and reduces flow, causing the hydraulic pump to function unevenly, which impacts the speed and smoothness of the loader's movements.
   
2. Hydraulic Pump or Valve Malfunction
   If the hydraulic pump or valve is malfunctioning, it could lead to insufficient oil pressure, causing the uplift and uptilt movements to become slow. A stuck valve or internal leakage could result in jerky and uneven operations.
   
3. Clogged or Leaking Hydraulic Lines
   Blockages or leaks in the hydraulic system's lines can reduce the oil flow, affecting the loader’s movements. Long-term usage or improper handling can cause the lines to break or become clogged, leading to hydraulic issues.
   
4. Control System Faults
   Faults in the loader’s control system could prevent the correct signals from reaching the hydraulic components. This could be an issue with the electronic control system or poor electrical connections, causing delays and jerky motions during operation.
   
5. Clogged Hydraulic Oil Filter
   A clogged hydraulic oil filter could also restrict oil flow, resulting in low hydraulic pressure, which impacts the loader’s uplift and uptilt actions. Regular filter changes are essential for maintaining a smooth hydraulic system.
   

1. Check Hydraulic Oil and Temperature
   Begin by inspecting the hydraulic oil quality and temperature. If the oil is poor or the temperature is too low, replace the oil, and make sure to operate the loader in an environment with appropriate temperatures to avoid the impact of cold oil.
   
2. Inspect Hydraulic Pump and Valve
   If the oil and temperature are fine, but the issue persists, check the hydraulic pump and valve. Perform flow tests on the pump and inspect for internal leaks or faults. If needed, repair or replace the faulty parts.
   
3. Check Hydraulic Lines
   Inspect the hydraulic lines for any damage, blockages, or leaks. Repair or replace any faulty lines, and ensure that all connections are tightly secured.
   
4. Inspect the Control System
   Check the electrical system and control signals to ensure there are no faults or loose connections. If there’s an issue with the control system, you may need to conduct an electronic diagnosis and repair or replace the faulty components.
   
5. Replace Hydraulic Oil Filter
   Check and replace the hydraulic oil filter to ensure that oil flows freely. A clogged filter can significantly affect the system's performance, leading to slow and jerky movements.
   

Hydraulic system malfunctions are a common issue when operating heavy equipment. This article discusses a case where the hydraulic system of a John Deere 332E skid steer failed to unlock, and explores potential causes and solutions for the problem.
Problem Description
The user noticed that the hydraulic system on their John Deere 332E skid steer was not unlocking, preventing the machine from operating normally. Specifically, the hydraulic system failed to respond, and the machine was unable to extend or operate attachments as usual. The hydraulic system was believed to be stuck or locked, which caused operational difficulties.
Possible Causes
Based on the user's description, the failure to unlock the hydraulic system could be due to several factors:

1. Low Hydraulic Oil Temperature
   The hydraulic system requires a certain oil temperature to function properly. If the oil temperature is too low, it may not flow properly, causing the system to fail to unlock. Running the machine for a while to allow the oil to warm up may help resolve this issue.
   
2. Hydraulic Control Valve Malfunction
   The hydraulic control valve regulates the flow and pressure of the hydraulic system. If the control valve is malfunctioning or clogged, it may prevent the hydraulic system from unlocking. Check the valve for any signs of blockage or damage.
   
3. Hydraulic Pump Issues
   The hydraulic pump is critical to the operation of the hydraulic system. If the pump is not delivering enough pressure or has failed, the hydraulic system may not unlock. Check the hydraulic pump's pressure output and perform any necessary repairs.
   
4. Hydraulic Leak
   If there is a leak in the hydraulic system, it could lead to unstable pressure or prevent the system from unlocking. Inspect the hydraulic lines and connections to ensure there are no leaks.
   

1. Check Hydraulic Oil Temperature
   Make sure the hydraulic oil is within the normal temperature range. Allow the machine to run for a while to warm the oil and ensure proper operation.
   
2. Inspect Hydraulic Control Valve
   Regularly check the hydraulic control valve to ensure it is not clogged or malfunctioning. If any issues are found, cleaning or replacing the valve may be necessary.
   
3. Check Hydraulic Pump Pressure
   Test the hydraulic pump’s pressure output to confirm it’s delivering sufficient pressure. If the pump is not performing adequately, it may need to be repaired or replaced.
   
4. Inspect Hydraulic Lines for Leaks
   Check the hydraulic lines for any signs of leaks. If a leak is found, repair or replace the damaged parts to restore normal hydraulic function.
   

On the panswork forum, discussions about choosing the best skid steer for beginners often come up. For those new to operating skid steers, selecting a suitable used machine can be challenging. While used equipment comes at a lower cost, making it an attractive option for beginners, it's crucial to choose a reliable machine to ensure good performance and minimize repairs. Below are some tips on how to select the right used skid steer and recommendations for the best brands for new operators.
Advantages and Disadvantages of Used Skid Steers
One of the major advantages of purchasing a used skid steer is the lower cost, especially for beginners who want to enter the industry without a hefty investment. The used market is full of well-maintained equipment that can be put to work immediately. However, buying used equipment does come with risks, such as potential mechanical issues, equipment wear, and unknown maintenance histories. Thoroughly inspecting the machine before purchase is essential to ensure reliability and prevent unexpected breakdowns.
Things to Consider When Buying a Used Skid Steer

1. Inspect the Equipment’s Condition
   

1. Understand the Machine’s Work History and Maintenance Record
   

1. Choose the Right Size for Your Workload
   

1. Bobcat
   

1. Case
   

1. Caterpillar
   

1. Kubota
   

1. New Holland
   

Choosing the right skid steer for a first-time user is crucial. Skid steers, known for their versatility and ease of operation, are widely used in various industries. This article will explore some of the best brands for beginners and provide helpful advice when purchasing a used skid steer.
Best Skid Steer Brands for Beginners

1. Bobcat
   Bobcat is a well-known brand in the skid steer industry, praised for its powerful performance and exceptional durability. Their control systems are simple and intuitive, making them ideal for beginners. Bobcat offers various models suitable for different job requirements.
   
2. CAT (Caterpillar)
   As a global leader in heavy machinery, CAT skid steers are renowned for their high quality and durability. CAT machines are known for their user-friendly operation interface, making them a great choice for those just starting out. Furthermore, CAT’s global service network ensures fast access to technical support.
   
3. Case
   Case skid steers are also highly regarded, especially for their stability. The hydraulic systems are well-designed, offering flexible operation and easy maintenance, which is perfect for beginners.
   
4. Kubota
   Kubota skid steers are highly favored by beginners due to their compact design and impressive fuel efficiency. These machines are ideal for small-scale projects that require high flexibility and efficiency.
   
5. New Holland
   New Holland skid steers have a strong reputation for their power systems and comfort features. Their intuitive control systems are perfect for new operators, and their reliability ensures smooth operation over time.
   

1. Check the Machine’s Usage and Maintenance History
   When purchasing a used skid steer, it’s essential to know the machine’s usage history and maintenance records. Ensure that the equipment hasn’t undergone major repairs or accidents and has been properly maintained.
   
2. Inspect the Hydraulic System and Engine Condition
   The hydraulic system and engine are two of the most critical parts of a skid steer. Before buying, make sure the hydraulic system has no leaks and the engine starts smoothly.
   
3. Check the Condition of Tires and Tracks
   Used skid steers may have worn tires or tracks. Be sure to check these parts for excessive wear or damage to ensure they’re still fit for use.
   
4. Conduct a Test Run
   It’s always best to conduct a test run before purchasing. This allows you to ensure the machine operates smoothly, with no strange noises or issues during operation.
   

On panswork, the experiences of independent operators are frequently discussed. Being an independent operator comes with the freedom and flexibility of running your own business, but also presents unique challenges. Whether managing small equipment or overseeing large-scale projects, independent operators need a strong set of technical skills and business acumen. Below are some of the common challenges and opportunities faced by independent operators.
Challenges of Being an Independent Operator

1. Balancing Work and Business Tasks
   

1. Unstable Income
   

1. Equipment Maintenance and Management
   

1. Customer Acquisition and Market Competition
   

1. Work Freedom and Flexibility
   

1. Potential for High Earnings
   

1. Skill and Experience Growth
   

1. Autonomy and Satisfaction