Troubleshooting Hydraulic Issues in Bobcat T595

[MikePhua]

Introduction: The Importance of Hydraulic Systems in Skid Steers
Hydraulic systems are the backbone of many heavy equipment operations, including skid steers like the Bobcat T595. These systems power everything from the lifting arms to the drive motors, making them critical for performance. When something goes wrong with the hydraulics, it can lead to a significant loss in efficiency and productivity.
One of the most frustrating problems that can occur in a Bobcat T595, or any similar skid steer, is losing and then regaining hydraulic function. This issue can cause delays, increase operational costs, and even lead to further damage if not addressed quickly. In this article, we’ll explore potential causes for hydraulic function loss, the steps to troubleshoot the issue, and tips for maintaining a healthy hydraulic system in your equipment.
Common Causes of Hydraulic Function Loss in Bobcat T595
There are several possible reasons why a Bobcat T595 could experience a loss and subsequent regain of hydraulic function. Let’s dive into some of the most common causes that owners and operators may encounter:

1. Hydraulic Fluid Levels and Quality:
   Low hydraulic fluid levels are one of the most common causes of intermittent hydraulic function. When the fluid level drops below the required minimum, the pump may struggle to supply enough pressure to the system, leading to a loss of function. Additionally, dirty or degraded hydraulic fluid can create blockages or reduce system efficiency.
   Solution: Always check the fluid levels and inspect for leaks. Use high-quality hydraulic fluid, and make sure to follow the manufacturer's recommended oil change schedule. If the fluid is dirty or discolored, it should be replaced.
   
2. Hydraulic Pump Issues:
   A malfunctioning hydraulic pump could be another reason for erratic hydraulic function. The pump is responsible for moving hydraulic fluid through the system, and if it's damaged or malfunctioning, it may cause intermittent or total loss of hydraulic power.
   Solution: If the pump is suspected to be the issue, it should be inspected by a qualified technician. Replacing the pump may be necessary if the issue persists after cleaning and checking for external blockages.
   
3. Air in the Hydraulic Lines:
   Air in the hydraulic lines can cause the system to lose pressure intermittently. This happens when there’s a breach in the system, often due to loose fittings, cracked hoses, or poorly sealed components. Air within the system can cause erratic behavior, as the pump cannot maintain a constant pressure to power the hydraulic functions properly.
   Solution: Inspect all hoses and connections for leaks or cracks. Tighten loose fittings, replace damaged hoses, and bleed the hydraulic system to remove trapped air.
   
4. Clogged or Dirty Filters:
   Hydraulic filters prevent contaminants from entering the system, which could lead to significant damage. If these filters become clogged, they can cause a drop in system pressure and hydraulic function.
   Solution: Check and replace hydraulic filters regularly to ensure that contaminants aren’t reducing the efficiency of the system. Always use the correct filter type recommended by the manufacturer.
   
5. Valve Malfunctions:
   The control valves that regulate hydraulic pressure and fluid flow may also be a source of the problem. Malfunctions in the valve, such as sticking or leaking, can cause hydraulic power to cut in and out. This could happen due to debris, wear, or poor maintenance.
   Solution: Inspect the control valves for signs of damage or debris. Clean or replace the valves as necessary to ensure smooth operation.
   
6. Overheating of the Hydraulic System:
   Excessive heat can cause the hydraulic fluid to break down, leading to a loss of system efficiency. Overheating can also cause seals to degrade and internal parts to wear out prematurely, making the problem worse.
   Solution: Ensure that the hydraulic system is operating within the recommended temperature range. Check the radiator, cooling system, and fluid levels to prevent overheating. Adding a cooler or replacing a malfunctioning one can help maintain optimal temperature.
   

How to Troubleshoot the Loss and Regain of Hydraulic Function
If you’re dealing with intermittent hydraulic function, here’s a step-by-step guide on how to troubleshoot the issue:

1. Step 1: Check Hydraulic Fluid:
   Start by inspecting the fluid levels. Ensure that the hydraulic fluid is at the recommended level. If low, top it off and check for any signs of leaks. Also, check the fluid's condition—if it appears dirty or has an unusual color, replace it.
   
2. Step 2: Inspect Hoses and Connections:
   Inspect all hydraulic lines, hoses, and connections for leaks or cracks. Air entering the system due to a loose hose or cracked fitting can cause hydraulic functions to cut in and out. Tighten or replace any damaged parts.
   
3. Step 3: Test the Pump:
   If fluid levels and hoses appear to be fine, the next step is to check the hydraulic pump. While this may require a professional, you can look for any obvious signs of damage or irregular noise coming from the pump. If the pump is failing, it could be losing the ability to maintain consistent pressure.
   
4. Step 4: Check and Replace Filters:
   If the pump is fine, the next component to inspect is the filter. A clogged filter can cause restricted flow, resulting in a loss of hydraulic function. Replace the filter if it appears clogged or dirty.
   
5. Step 5: Inspect Control Valves:
   If the pump and filter check out, examine the control valves. Look for any signs of sticking or leaks. Manually test the valve by moving it through its full range of motion to see if it’s functioning properly. If necessary, clean or replace the valve.
   
6. Step 6: Monitor for Overheating:
   Lastly, ensure that the hydraulic system is not overheating. If you notice the system is running hot, inspect the cooling system and radiator for blockages. Make sure the cooling system is working efficiently.
   

Maintaining a Healthy Hydraulic System
Preventive maintenance is the best way to avoid hydraulic system failures. Here are a few tips for maintaining the hydraulic system in your Bobcat T595:

1. Regular Fluid Checks: Always check hydraulic fluid levels regularly and top off as needed. If you operate in dusty or dirty conditions, change the fluid more frequently to prevent contamination.
   
2. Routine Filter Replacements: Change hydraulic filters as per the manufacturer's recommendations. A clogged filter can create serious issues down the line.
   
3. Prevent Overheating: Keep an eye on the temperature of the hydraulic system. Ensure that the system is properly cooled and that there is no obstruction in the cooling system.
   
4. Proper Hosing: Inspect hoses regularly for wear and replace any cracked or damaged hoses immediately. A small leak can lead to major issues if not addressed.
   

Conclusion: Dealing with Hydraulic Loss in Bobcat T595
Hydraulic system issues, particularly when function is lost and regained intermittently, can be frustrating and costly. However, by following a systematic troubleshooting approach and conducting regular maintenance, operators can minimize downtime and ensure that their Bobcat T595 skid steer continues to perform at its best. Always remember that keeping your hydraulic system clean, properly maintained, and regularly inspected will prevent many common problems from escalating into bigger issues.
By taking proactive steps in maintaining the machine's hydraulic system, you can extend the life of your Bobcat T595 and keep it operating efficiently for years to come.