The Ford 6600 tractor, a popular model in the Ford 600 series, is known for its robust power steering system. Understanding the power steering box diagram is crucial for maintenance, troubleshooting, and repairs. The power steering box is a critical component that converts the rotational motion of the steering wheel into the linear motion needed to turn the wheels. It's located at the base of the steering column and connects to the front axle via tie rods.

The power steering system in the Ford 6600 uses hydraulic pressure to assist in turning the wheels, making steering easier and more responsive. This system consists of several key components, including the power steering pump, reservoir, hoses, and the steering box itself. The steering box contains various internal parts such as the input shaft, sector shaft, ball nut, and valves that work together to provide smooth and efficient steering control.

ComponentFunction
Input ShaftConnects to steering wheel
Sector ShaftConverts rotary to linear motion
Ball NutReduces friction in steering
Control ValveDirects hydraulic fluid flow

Power Steering Box Components

The power steering box of the Ford 6600 is a complex assembly with several crucial components. The input shaft is directly connected to the steering wheel and enters the steering box at the top. As it rotates, it activates the control valve, which directs the flow of hydraulic fluid. This fluid, under pressure from the power steering pump, assists in turning the wheels with less effort from the operator.

Inside the steering box, the ball nut assembly is a key component. It consists of a large nut with ball bearings that circulate within it, reducing friction and wear. The ball nut is connected to the sector shaft, which protrudes from the side of the steering box. The sector shaft has a toothed sector gear at its end, which meshes with the pitman arm to convert the rotary motion into the linear motion needed to turn the wheels.

The control valve is another critical element within the steering box. It's responsible for directing the flow of hydraulic fluid based on the direction and amount of steering input. When the steering wheel is turned, the valve opens to allow pressurized fluid to flow to the appropriate side of the piston, assisting the steering action.

Seals and Bearings

Proper sealing is essential for the efficient operation of the power steering box. The Ford 6600 steering box contains several seals and O-rings that prevent fluid leaks and keep contaminants out. These include seals around the input shaft, sector shaft, and various internal components. Over time, these seals can wear out, leading to leaks and reduced steering performance.

Bearings play a crucial role in the smooth operation of the steering box. They support the input shaft and sector shaft, allowing them to rotate with minimal friction. The ball bearings in the ball nut assembly are particularly important, as they help distribute the load and reduce wear on the steering components.

Hydraulic System Integration

The power steering box in the Ford 6600 is part of a larger hydraulic system. The power steering pump, typically driven by the engine via a belt, pressurizes the hydraulic fluid. This fluid is stored in a reservoir and circulated through high-pressure hoses to the steering box. The pressure generated by the pump can range from 800 to 1200 psi during normal operation, providing the necessary force to assist in steering.

The hydraulic system includes pressure relief valves to prevent over-pressurization, which could damage components or burst hoses. These valves are typically set to open at around 1500 psi, redirecting excess fluid back to the reservoir. Understanding the hydraulic system's layout and pressure requirements is crucial for diagnosing issues and maintaining proper steering performance.

Fluid Requirements

The Ford 6600 power steering system requires the correct type and amount of hydraulic fluid to function properly. New Holland 134D hydraulic oil or its equivalent is recommended for use in the power steering system. It's important to note that using the wrong type of fluid, such as automatic transmission fluid (ATF), can lead to premature wear and damage to the steering components.

Regular fluid checks and changes are essential for maintaining the power steering system. The fluid should be checked when the tractor is cold and on level ground. If the fluid appears dark or has a burnt smell, it's time for a change. Contaminated or degraded fluid can cause increased wear on the steering box components and reduce overall steering performance.

Common Issues and Troubleshooting

Power steering problems in the Ford 6600 can manifest in various ways. Difficulty steering, especially when the tractor is stationary or moving slowly, is a common complaint. This could be due to low fluid levels, a failing pump, or worn components within the steering box itself. Unusual noises, such as whining or groaning when turning the steering wheel, often indicate air in the system or a failing pump.

Fluid leaks are another frequent issue. These can occur at various points in the system, including the steering box seals, hose connections, or the pump itself. Regular visual inspections can help catch leaks early before they lead to more serious problems. If you notice fluid puddles under the tractor or a consistently low fluid level, it's crucial to identify and repair the leak promptly.

Diagnostic Steps

When troubleshooting power steering issues on a Ford 6600, start with these basic steps:

  • Check the fluid level and condition
  • Inspect hoses and connections for leaks
  • Listen for unusual noises during operation
  • Test the steering wheel for excessive play or stiffness
  • Examine the steering box for signs of wear or damage

If these initial checks don't reveal the problem, more in-depth diagnostics may be necessary. This could involve pressure testing the system, inspecting internal components of the steering box, or checking the power steering pump's output.

Maintenance and Repairs

Regular maintenance is key to ensuring the longevity and reliability of the Ford 6600's power steering system. Fluid changes should be performed according to the manufacturer's recommendations, typically every 500 hours of operation or annually, whichever comes first. During fluid changes, it's a good opportunity to inspect the system for leaks and wear.

Greasing the steering components, including the tie rod ends and ball joints, helps prevent wear and ensures smooth operation. This should be done regularly, often as part of a broader maintenance routine for the tractor.

Rebuilding vs. Replacement

When faced with a failing power steering box, tractor owners must decide between rebuilding the existing unit or replacing it with a new or remanufactured one. Rebuilding can be cost-effective and allows for the retention of original equipment, but it requires significant skill and specialized tools. Replacement with a new or remanufactured unit is often quicker and comes with a warranty, but it may be more expensive upfront.

Factors to consider when making this decision include:

  • The age and overall condition of the tractor
  • Availability of rebuild kits and parts
  • Cost comparison between rebuilding and replacement
  • Your mechanical skills and available tools
  • Downtime considerations for your farming operations

Upgrades and Modifications

While the original power steering system in the Ford 6600 is robust, some owners opt for upgrades or modifications to enhance performance or address recurring issues. One common upgrade is the installation of a larger capacity pump to provide more assist at low engine speeds. This can be particularly beneficial for tractors that spend a lot of time operating front-end loaders or other implements that require frequent steering at low speeds.

Another potential modification is the addition of a steering stabilizer. This hydraulic damper helps reduce feedback from rough terrain, providing smoother and more controlled steering. It can be especially useful for tractors used in field work or on uneven ground.

Compatibility Considerations

When considering upgrades or modifications to the power steering system, it's crucial to ensure compatibility with the existing components. Factors to consider include:

  • Hydraulic pressure ratings of new components
  • Fitment of new parts with existing mounting points
  • Impact on other systems, such as the hydraulic lift
  • Potential effects on warranty (for newer tractors)

Always consult with experienced mechanics or Ford tractor specialists before making significant modifications to ensure they won't compromise the tractor's reliability or safety.

FAQs About Ford 6600 Power Steering Box Diagram

    • What causes power steering failure in a Ford 6600?
      Common causes include low fluid levels, worn pump, damaged seals, or internal wear in the steering box.
    • How often should power steering fluid be changed in a Ford 6600?
      Typically every 500 hours of operation or annually, whichever comes first.
    • Can I use ATF in my Ford 6600 power steering system?
      No, use New Holland 134D hydraulic oil or its equivalent as recommended by the manufacturer.
    • What are signs of a failing power steering pump in a Ford 6600?
      Whining noises, difficulty steering, and fluid leaks are common indicators of pump issues.
    • Is it possible to rebuild a Ford 6600 power steering box at home?
      While possible, it requires specialized tools and skills. Professional rebuilding is often recommended for best results.