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The Bobcat 753 is a versatile and compact skid steer loader designed for use in a variety of construction, landscaping, and agricultural tasks. Known for its power and maneuverability in tight spaces, the 753 is a popular choice for many operators. However, like any machine, it can experience mechanical issues that hinder its performance. One common problem reported by owners is the inability of the loader to tilt the bucket or attachment, which can prevent effective operation. This article will explore the potential causes of this issue and provide troubleshooting solutions.
Overview of the Bobcat 753 Skid Steer Loader
The Bobcat 753 was introduced as part of Bobcat's 700 series of skid steers, known for their robust build and reliable performance in challenging conditions. The 753 is powered by a 50 horsepower engine and has a rated operating capacity of about 1,300 lbs (590 kg). The machine is equipped with a hydraulically driven lift arm and a bucket, which can be used for digging, lifting, and material handling. The 753 is equipped with a radial lift arm configuration, which provides excellent ground clearance and reach for digging tasks.
Despite its compact size, the Bobcat 753 can handle a variety of heavy-duty tasks, making it a go-to machine for many contractors. However, when the tilt function malfunctions, it can severely limit the machine's usefulness.
Understanding the Tilt Mechanism
The tilt function on the Bobcat 753 is powered by the hydraulic system, which controls the movement of the loader's bucket or attachment. The bucket tilt is operated by the hydraulics in the arm and bucket system, which works in conjunction with hydraulic cylinders. When the operator moves the joystick control in the cab, hydraulic fluid is directed to these cylinders, allowing the bucket to tilt forward or backward.
If the machine is unable to perform this function, it can be caused by various issues related to the hydraulic system, electrical system, or mechanical components. Let’s look at the potential causes of this problem in more detail.
Common Causes of Tilt Function Failure
Several factors can contribute to the Bobcat 753’s inability to tilt the bucket properly. Some of the most common causes include:
1. Hydraulic Fluid Issues
The most common cause of tilt malfunction is an issue with the hydraulic system. Low hydraulic fluid levels, dirty fluid, or contaminated fluid can significantly reduce the efficiency of the hydraulic system, affecting the tilt function. In some cases, air trapped in the hydraulic lines can cause uneven pressure, preventing the bucket from tilting properly.
Solution: Check the hydraulic fluid levels and ensure they are within the recommended range. If the fluid is low, refill it with the correct type of hydraulic fluid as specified in the operator’s manual. If the fluid is dirty or contaminated, flush the system and replace the fluid with new fluid. Also, check for any air pockets by bleeding the hydraulic system, which can be done by operating the loader without a load and allowing it to cycle through the tilt function several times.
2. Faulty Tilt Cylinder or Seal Damage
The tilt function relies on hydraulic cylinders that are responsible for the movement of the bucket. If one of these cylinders becomes damaged or its seals wear out, the cylinder will not be able to generate the necessary pressure to tilt the bucket.
Solution: Inspect the tilt cylinders for signs of damage, such as leaks, cracks, or bent components. Check the seals on the cylinders for wear or damage. If any of the cylinders or seals are damaged, they will need to be replaced. Rebuilding the hydraulic cylinders may be an option if the damage is not severe.
3. Blocked or Clogged Hydraulic Lines
Another common cause of tilt malfunction is a blockage or clog in the hydraulic lines. Over time, debris or sludge can accumulate in the lines, restricting the flow of hydraulic fluid to the cylinders.
Solution: Inspect the hydraulic lines for any visible signs of damage or obstruction. If the lines are clogged, clean them out or replace them if necessary. Ensure that all connections are secure and free from leaks.
4. Faulty Control Valve
The hydraulic control valve is responsible for directing hydraulic fluid to the appropriate cylinders based on the joystick input. If the valve malfunctions, it may fail to send the necessary fluid to the tilt cylinders, preventing the bucket from tilting.
Solution: Test the control valve to ensure it is operating properly. If the valve is faulty, it may need to be replaced or repaired. This issue may also be related to the electrical control system, so ensure the wiring and connections are secure.
5. Electrical or Solenoid Malfunction
On some models of the Bobcat 753, electrical solenoids control the operation of the hydraulic control valve. If the solenoid fails or the electrical system malfunctions, the hydraulic fluid may not be directed to the tilt cylinders as needed.
Solution: Inspect the solenoids and electrical connections to ensure they are functioning properly. Check the fuses and relays to ensure there are no electrical failures. If a solenoid is faulty, it will need to be replaced.
6. Joystick Control Issues
The joystick control system is responsible for transmitting the operator’s input to the hydraulic control system. If the joystick or associated wiring malfunctions, the tilt function may not respond.
Solution: Inspect the joystick for any physical damage or wear. If the joystick is unresponsive, check the wiring connections and ensure there are no loose or broken wires. A faulty joystick sensor may need to be replaced.
Troubleshooting Steps for Tilt Function Failure
If the Bobcat 753 is experiencing tilt function issues, follow these troubleshooting steps to identify and resolve the problem:
To avoid tilt function issues in the future, perform regular maintenance on the Bobcat 753:
Conclusion
The Bobcat 753 is a reliable and versatile skid steer loader that can handle a variety of tasks, but like any machine, it is prone to occasional issues. When the tilt function fails, it can be caused by a number of factors, including hydraulic fluid issues, faulty cylinders, blocked hydraulic lines, or electrical malfunctions. By following the troubleshooting steps outlined in this article, you can identify and resolve the issue efficiently. Regular maintenance and inspections will help prevent tilt function problems from occurring in the future and ensure your Bobcat 753 continues to perform at its best.
Overview of the Bobcat 753 Skid Steer Loader
The Bobcat 753 was introduced as part of Bobcat's 700 series of skid steers, known for their robust build and reliable performance in challenging conditions. The 753 is powered by a 50 horsepower engine and has a rated operating capacity of about 1,300 lbs (590 kg). The machine is equipped with a hydraulically driven lift arm and a bucket, which can be used for digging, lifting, and material handling. The 753 is equipped with a radial lift arm configuration, which provides excellent ground clearance and reach for digging tasks.
Despite its compact size, the Bobcat 753 can handle a variety of heavy-duty tasks, making it a go-to machine for many contractors. However, when the tilt function malfunctions, it can severely limit the machine's usefulness.
Understanding the Tilt Mechanism
The tilt function on the Bobcat 753 is powered by the hydraulic system, which controls the movement of the loader's bucket or attachment. The bucket tilt is operated by the hydraulics in the arm and bucket system, which works in conjunction with hydraulic cylinders. When the operator moves the joystick control in the cab, hydraulic fluid is directed to these cylinders, allowing the bucket to tilt forward or backward.
If the machine is unable to perform this function, it can be caused by various issues related to the hydraulic system, electrical system, or mechanical components. Let’s look at the potential causes of this problem in more detail.
Common Causes of Tilt Function Failure
Several factors can contribute to the Bobcat 753’s inability to tilt the bucket properly. Some of the most common causes include:
1. Hydraulic Fluid Issues
The most common cause of tilt malfunction is an issue with the hydraulic system. Low hydraulic fluid levels, dirty fluid, or contaminated fluid can significantly reduce the efficiency of the hydraulic system, affecting the tilt function. In some cases, air trapped in the hydraulic lines can cause uneven pressure, preventing the bucket from tilting properly.
Solution: Check the hydraulic fluid levels and ensure they are within the recommended range. If the fluid is low, refill it with the correct type of hydraulic fluid as specified in the operator’s manual. If the fluid is dirty or contaminated, flush the system and replace the fluid with new fluid. Also, check for any air pockets by bleeding the hydraulic system, which can be done by operating the loader without a load and allowing it to cycle through the tilt function several times.
2. Faulty Tilt Cylinder or Seal Damage
The tilt function relies on hydraulic cylinders that are responsible for the movement of the bucket. If one of these cylinders becomes damaged or its seals wear out, the cylinder will not be able to generate the necessary pressure to tilt the bucket.
Solution: Inspect the tilt cylinders for signs of damage, such as leaks, cracks, or bent components. Check the seals on the cylinders for wear or damage. If any of the cylinders or seals are damaged, they will need to be replaced. Rebuilding the hydraulic cylinders may be an option if the damage is not severe.
3. Blocked or Clogged Hydraulic Lines
Another common cause of tilt malfunction is a blockage or clog in the hydraulic lines. Over time, debris or sludge can accumulate in the lines, restricting the flow of hydraulic fluid to the cylinders.
Solution: Inspect the hydraulic lines for any visible signs of damage or obstruction. If the lines are clogged, clean them out or replace them if necessary. Ensure that all connections are secure and free from leaks.
4. Faulty Control Valve
The hydraulic control valve is responsible for directing hydraulic fluid to the appropriate cylinders based on the joystick input. If the valve malfunctions, it may fail to send the necessary fluid to the tilt cylinders, preventing the bucket from tilting.
Solution: Test the control valve to ensure it is operating properly. If the valve is faulty, it may need to be replaced or repaired. This issue may also be related to the electrical control system, so ensure the wiring and connections are secure.
5. Electrical or Solenoid Malfunction
On some models of the Bobcat 753, electrical solenoids control the operation of the hydraulic control valve. If the solenoid fails or the electrical system malfunctions, the hydraulic fluid may not be directed to the tilt cylinders as needed.
Solution: Inspect the solenoids and electrical connections to ensure they are functioning properly. Check the fuses and relays to ensure there are no electrical failures. If a solenoid is faulty, it will need to be replaced.
6. Joystick Control Issues
The joystick control system is responsible for transmitting the operator’s input to the hydraulic control system. If the joystick or associated wiring malfunctions, the tilt function may not respond.
Solution: Inspect the joystick for any physical damage or wear. If the joystick is unresponsive, check the wiring connections and ensure there are no loose or broken wires. A faulty joystick sensor may need to be replaced.
Troubleshooting Steps for Tilt Function Failure
If the Bobcat 753 is experiencing tilt function issues, follow these troubleshooting steps to identify and resolve the problem:
- Check Hydraulic Fluid: Verify that the hydraulic fluid levels are correct and that the fluid is clean. If the fluid is dirty or contaminated, flush and replace it.
- Inspect Hydraulic Cylinders: Check the tilt cylinders for leaks, cracks, or worn seals. Replace any damaged components as needed.
- Examine Hydraulic Lines: Look for any clogs or obstructions in the hydraulic lines. Clean or replace blocked lines as necessary.
- Test the Control Valve: Ensure the hydraulic control valve is functioning properly. Repair or replace the valve if needed.
- Inspect Electrical Components: Verify that the solenoids, relays, and wiring are in good condition. Replace any faulty electrical components.
- Check Joystick Control: If the issue is related to joystick response, inspect the joystick and its connections. Repair or replace as needed.
To avoid tilt function issues in the future, perform regular maintenance on the Bobcat 753:
- Regularly check hydraulic fluid levels and replace the fluid at the recommended intervals.
- Inspect hydraulic hoses and cylinders for damage or wear and replace components as necessary.
- Clean the hydraulic system periodically to prevent dirt and debris from clogging the lines.
- Test the joystick and electrical components regularly to ensure proper function.
- Perform a visual inspection of the machine before each use, looking for any obvious signs of damage or wear.
Conclusion
The Bobcat 753 is a reliable and versatile skid steer loader that can handle a variety of tasks, but like any machine, it is prone to occasional issues. When the tilt function fails, it can be caused by a number of factors, including hydraulic fluid issues, faulty cylinders, blocked hydraulic lines, or electrical malfunctions. By following the troubleshooting steps outlined in this article, you can identify and resolve the issue efficiently. Regular maintenance and inspections will help prevent tilt function problems from occurring in the future and ensure your Bobcat 753 continues to perform at its best.
