Troubleshooting Drive Problems in New Holland 170

[MikePhua]

New Holland's range of skid steers, including the New Holland 170, is known for its durability and efficiency in various construction and landscaping applications. However, like all heavy equipment, the New Holland 170 can experience mechanical issues, particularly with its drive system. Understanding these issues, diagnosing the problem, and knowing the best solutions can help you maintain the skid steer’s performance and minimize downtime.
Overview of New Holland 170
The New Holland 170 is a part of New Holland's popular series of skid steer loaders. These compact machines are widely used in construction, agriculture, and industrial settings for their versatility and ease of maneuverability. The 170 model, in particular, is recognized for its powerful hydraulic system and high lifting capacity, making it ideal for tasks such as material handling, grading, and site preparation.
Skid steers like the New Holland 170 operate with a unique drivetrain, where each wheel is driven independently by a separate hydraulic motor. This allows for excellent maneuverability and the ability to turn in place. This drivetrain system, however, also makes the machine susceptible to certain drive problems that can affect performance.
Common Drive Problems in New Holland 170
The drive system in a skid steer loader consists of several components, including the hydraulic pumps, motors, and controls. When issues arise in these parts, it can result in reduced power, loss of mobility, or even complete failure of the drive system. Below are some of the most common drive-related problems in the New Holland 170 and their potential causes.
1. Loss of Drive Power
One of the most alarming problems a New Holland 170 owner might face is a sudden loss of drive power. When the machine’s wheels fail to respond as expected, it can be difficult or even impossible to complete tasks.

• Symptoms:
  • The machine struggles to move or won’t move at all.
    
  • Reduced speed and sluggish response when operating the controls.
    
  • Unusual noises or whining sounds coming from the drivetrain.
    
• Common Causes:
  • Low Hydraulic Fluid: The New Holland 170 relies heavily on hydraulic power to drive its wheels. A drop in hydraulic fluid levels can lead to sluggish performance or a complete lack of drive power.
    
  • Hydraulic Pump Failure: The hydraulic pump is essential for generating the pressure needed to operate the drive motors. If the pump is failing, it will result in a lack of power to the drive system.
    
  • Clogged Hydraulic Filters: Filters protect the hydraulic system from dirt and debris. If they become clogged, the fluid cannot circulate efficiently, leading to a drop in power and performance.
    
  • Drive Motor Issues: The drive motors themselves may wear out or fail due to excessive use, fluid contamination, or a lack of maintenance.
    
• Solutions:
  • Check hydraulic fluid levels and top off if necessary. Always use the recommended fluid type for the New Holland 170 to ensure optimal performance.
    
  • Inspect the hydraulic pump for signs of wear or damage. If needed, replace or rebuild the pump.
    
  • Replace clogged filters and regularly maintain the hydraulic system to prevent future issues.
    
  • Check the drive motors for any signs of malfunction. If the motors are found to be faulty, they may need to be rebuilt or replaced.
    

2. Uneven Wheel Movement or Skidding
Another common problem in the New Holland 170 is uneven wheel movement or excessive skidding. Since skid steers are designed to turn by driving the left and right wheels at different speeds, issues with the drive system can cause one or more wheels to fail to engage properly.

• Symptoms:
  • The machine pulls to one side during operation.
    
  • One or more wheels seem to be slipping or moving slower than the others.
    
  • The skid steer struggles to turn or does not turn sharply as expected.
    
• Common Causes:
  • Hydraulic Motor Failure: Each wheel on a skid steer is typically driven by its own hydraulic motor. If one of these motors fails or becomes inefficient, the corresponding wheel may not move as it should.
    
  • Inconsistent Hydraulic Pressure: If the hydraulic pressure is not evenly distributed across the system, it can lead to uneven wheel movement. This may be due to issues with the hydraulic pump, control valves, or hoses.
    
  • Drive Gear Issues: Skid steers like the New Holland 170 use a complex system of gears and chains to transfer power to the wheels. If these components become worn or misaligned, it can cause the wheels to move unevenly.
    
• Solutions:
  • Check each hydraulic motor for proper function. If necessary, replace or rebuild the motor to restore full power to the affected wheel.
    
  • Inspect the hydraulic system for leaks or blockages that could affect pressure distribution.
    
  • Inspect the drive gears and chains for signs of wear. Replace any worn components to ensure smooth operation.
    

3. Loss of Steering Control
The steering system of the New Holland 170 is integral to its maneuverability. When the steering system fails or becomes unresponsive, it can severely limit the machine’s ability to move and turn.

• Symptoms:
  • Difficulty turning or the inability to turn the machine.
    
  • Sluggish response to the steering controls.
    
  • The machine moves in a straight line but does not respond to steering inputs.
    
• Common Causes:
  • Steering Motor Failure: If the steering motor fails, it can lead to a lack of responsiveness in the machine’s turning capability.
    
  • Low or Contaminated Hydraulic Fluid: Hydraulic fluid is crucial for steering control. If the fluid is low or contaminated, it can result in poor or non-responsive steering.
    
  • Steering Valve Issues: The steering valves control the flow of hydraulic fluid to the steering motors. If these valves are malfunctioning, the steering system may not operate correctly.
    
• Solutions:
  • Inspect the steering motor for proper operation. Replace or repair it as needed.
    
  • Ensure the hydraulic fluid is clean and at the correct level. Contaminated fluid should be replaced, and any leaks in the system should be repaired.
    
  • Check the steering valves for blockages or signs of failure. If necessary, clean or replace the valves to restore proper steering functionality.
    

4. Electrical Issues Affecting Drive System
In modern skid steers like the New Holland 170, the electrical system plays a crucial role in controlling the hydraulic system and other critical components of the drive system. Electrical issues can cause erratic behavior or complete failure of the drive functions.

• Symptoms:
  • The machine fails to respond to the operator's inputs.
    
  • Warning lights on the dashboard related to the drive system.
    
  • Loss of power or inconsistent performance after engaging the drive.
    
• Common Causes:
  • Battery or Alternator Failure: A dead battery or failing alternator can cause electrical issues that affect the hydraulic system’s performance.
    
  • Wiring or Connection Issues: Loose or corroded wiring connections can disrupt the communication between the control system and the drive components.
    
  • Faulty Control Module: The New Holland 170 uses a control module to manage the hydraulic functions. If this module fails, it can result in loss of drive power or erratic performance.
    
• Solutions:
  • Check the battery and alternator to ensure they are functioning properly. Replace them if necessary.
    
  • Inspect wiring and electrical connections for corrosion or looseness. Clean or replace any faulty connections.
    
  • If the control module is suspected to be faulty, have it diagnosed by a professional technician. Replacing or repairing the control module may be required.
    

Conclusion
The New Holland 170 is a robust and versatile machine, but like any heavy equipment, it can encounter drive-related issues over time. Identifying the root cause of drive problems, such as hydraulic failures, electrical issues, or steering malfunctions, is key to keeping the machine running smoothly. Regular maintenance, including checking hydraulic fluid levels, inspecting motors and valves, and maintaining the electrical system, can help prevent many common problems. When troubleshooting more complex issues, it is always advisable to consult the equipment’s manual or seek help from a professional technician to ensure that repairs are carried out properly.