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The Ford 755 backhoe, produced between 1978 and 1983, is renowned for its durability and versatility in construction and agricultural applications. However, like all heavy machinery, it requires regular maintenance and attention to ensure optimal performance. This guide delves into common issues faced by owners, provides detailed troubleshooting steps, and offers maintenance tips to keep the Ford 755 running smoothly.
Hydraulic System Troubleshooting
The hydraulic system is the backbone of the Ford 755 backhoe, powering the boom, dipper, bucket, and loader. Common hydraulic issues include:
Engine issues can manifest as rough idling, stalling, or difficulty starting. Common causes include:
Transmission problems can present as difficulty shifting gears or a complete loss of drive. Common issues include:
Power steering problems can make maneuvering the backhoe challenging. Common causes include:
Over time, the boom and other structural components can develop cracks due to stress and wear. Regularly inspect the boom for any signs of cracking, especially around the hydraulic line entry points. If cracks are found, consult a professional welder experienced in heavy equipment repairs.
Maintenance Tips
To prolong the life of your Ford 755 backhoe and prevent common issues:
The Ford 755 backhoe is a robust machine capable of handling a variety of tasks. By adhering to regular maintenance schedules and promptly addressing any issues, owners can ensure their backhoe remains a reliable asset for years to come. Always consult the owner's manual and, when in doubt, seek professional assistance to address complex mechanical problems.
Hydraulic System Troubleshooting
The hydraulic system is the backbone of the Ford 755 backhoe, powering the boom, dipper, bucket, and loader. Common hydraulic issues include:
- Sluggish or Unresponsive Controls: Often caused by air in the hydraulic lines, low fluid levels, or worn seals. Regularly check for leaks and ensure the hydraulic fluid is at the recommended level.
- Overheating Hydraulic Fluid: This can occur due to a clogged hydraulic cooler, overfilled fluid, or internal pump issues. Inspect the cooler for debris and clean it regularly. Ensure the fluid level is within the specified range.
- Cylinder Pressure Lock: When the bucket curls under a heavy load, internal pressure can trap the cylinder, preventing extension. To resolve this, relieve system pressure by shutting off the engine, then inspect hydraulic lines and the relief valve for blockages or damage.
Engine issues can manifest as rough idling, stalling, or difficulty starting. Common causes include:
- Fuel Contamination: Inspect the fuel filter for debris or water. Contaminated fuel can lead to poor engine performance and potential damage.
- Air in the Fuel System: If the engine runs briefly and then stalls, air might be trapped in the fuel lines. Bleed the system by loosening the fuel lines at the injectors and pumping the primer.
- Simms Injection Pump Oil: Some models of the Ford 755 are equipped with a Simms injection pump that requires its own oil supply. Ensure the pump's oil is at the correct level and replace it as per the manufacturer's recommendations.
Transmission problems can present as difficulty shifting gears or a complete loss of drive. Common issues include:
- Low Hydraulic Fluid Temperature: If the transmission doesn't engage until the machine warms up, it might indicate low hydraulic fluid temperature. Check the fluid level and ensure it is within the specified range.
- Transmission Filter Clogging: A clogged filter can restrict fluid flow, leading to shifting issues. Replace the transmission filter regularly as part of routine maintenance.
Power steering problems can make maneuvering the backhoe challenging. Common causes include:
- Air in the Steering System: Foamy or overfilled hydraulic fluid indicates air in the system, often from a failing steering pump or leaks. Drain excess fluid to the correct level and bleed the system to remove trapped air.
- Worn Steering Pump: A failing steering pump can cause sluggish or unresponsive steering. Inspect the pump for wear or internal damage and replace it if necessary.
Over time, the boom and other structural components can develop cracks due to stress and wear. Regularly inspect the boom for any signs of cracking, especially around the hydraulic line entry points. If cracks are found, consult a professional welder experienced in heavy equipment repairs.
Maintenance Tips
To prolong the life of your Ford 755 backhoe and prevent common issues:
- Regular Fluid Checks: Periodically check all fluid levels, including engine oil, hydraulic fluid, and transmission fluid. Replace fluids as per the manufacturer's schedule.
- Filter Replacements: Replace air, fuel, and hydraulic filters at recommended intervals to ensure optimal performance.
- Seal Inspections: Regularly inspect seals for wear or leaks, especially around hydraulic cylinders and the fuel system.
- Cooling System Maintenance: Keep the radiator and hydraulic cooler clean to prevent overheating. Flush the cooling system as recommended.
- Tire and Undercarriage Care: Inspect tires for wear and maintain proper inflation. Regularly check the undercarriage for signs of wear or damage.
The Ford 755 backhoe is a robust machine capable of handling a variety of tasks. By adhering to regular maintenance schedules and promptly addressing any issues, owners can ensure their backhoe remains a reliable asset for years to come. Always consult the owner's manual and, when in doubt, seek professional assistance to address complex mechanical problems.
