Troubleshooting Motor Bogging When Turning: Causes and Solutions

[MikePhua]

Introduction: The Importance of Smooth Turning in Heavy Machinery
One of the most frustrating issues operators can face with heavy machinery is when the motor bogs down or loses power while turning. This can disrupt operations, decrease productivity, and potentially cause long-term damage to the machine. Whether you're working with a skid steer, excavator, or another piece of heavy equipment, smooth turning is essential for maneuverability and control. Understanding why the engine bogs down during turns and how to address the issue is crucial to keeping the equipment in peak condition.
In this article, we’ll explore the common causes of motor bogging during turns, how to troubleshoot the problem, and some practical solutions to keep your equipment running smoothly.
Understanding the Bogging Issue
Motor bogging occurs when the engine struggles to maintain its RPMs, usually due to some form of resistance or malfunction. While turning, the machine may feel sluggish or unresponsive, with the engine losing power temporarily or failing to accelerate smoothly. This can happen on both tracked and wheeled equipment, and it can be caused by a variety of factors.
Common Causes of Motor Bogging During Turns

1. Hydraulic System Problems
   

In many cases, motor bogging when turning is related to issues within the hydraulic system. In machines like skid steers, the hydraulic motors are responsible for powering the drive system, including steering. If there is a problem with the hydraulic system, such as low fluid levels, air in the lines, or worn-out hydraulic components, the system may not be able to provide sufficient power to turn the machine smoothly.

• Low Hydraulic Fluid: If the hydraulic fluid is low, it can lead to decreased power when trying to turn. The pump may not be able to generate enough pressure to operate the steering motors properly, causing a drop in engine RPMs as the load increases during a turn.
  
• Clogged Hydraulic Filter: A clogged filter can restrict fluid flow, leading to low pressure in the system. This will impact the hydraulic motors and cause motor bogging when attempting a turn.
  
• Air in the Hydraulic System: If air enters the hydraulic system, it can cause spongy or erratic steering. The air bubbles can create pressure fluctuations, which may lead to inconsistent power delivery to the wheels or tracks, especially when turning.
  

1. Transmission and Drive Train Issues
   

Transmission and drivetrain problems are also common causes of motor bogging during turns. If there’s a malfunction in the transmission or if the drive belts are worn out, the machine will struggle to transfer power efficiently, leading to bogging during turning.

• Slipping Clutch or Transmission: In machines with manual transmission or a slipping clutch, turning can cause a temporary loss of power because the transmission is unable to maintain proper engagement. This results in a momentary bogging effect before the machine is able to regain power.
  
• Worn Drive Belts or Chains: A worn or damaged drive belt or chain can slip or fail to transfer power from the engine to the wheels or tracks effectively. This becomes more apparent during turns when the load on the drivetrain is increased.
  

1. Engine-Related Issues
   

Although less common, engine-related issues can also contribute to bogging when turning. If the engine isn’t delivering consistent power or the fuel system is struggling, it may fail to keep up with the demands of turning.

• Fuel Delivery Problems: Issues with the fuel pump, fuel filters, or injectors can cause inconsistent fuel delivery to the engine. When the engine is under stress, like during a turn, it may bog down as it struggles to receive the necessary fuel.
  
• Air Filter Blockage: A clogged air filter can restrict airflow to the engine, reducing its power output. During turns, when the engine is under additional load, the lack of air can cause it to bog down.
  
• Engine Timing Issues: Problems with ignition timing can lead to poor engine performance, especially under load. If the timing is off, the engine may stutter or lose power when trying to turn.
  

1. Tire or Track Issues
   

For wheeled equipment, issues with tires can also cause bogging when turning. If the tires are improperly inflated or worn out, they can create excessive friction, which strains the engine.

• Underinflated or Worn Tires: If the tires are not properly inflated or are excessively worn, they can cause resistance when turning. This increases the load on the engine, leading to bogging.
  
• Mismatched Tires: If the tires are mismatched in terms of size or tread, the machine can experience uneven resistance, especially during turns, which can bog down the engine.
  

1. Electrical System Problems
   

Sometimes, the bogging can be linked to electrical issues. If the battery is weak or there are issues with the electrical system, it can affect the engine’s ability to maintain power during turns.

• Weak Battery: A weak or failing battery can lead to inconsistent voltage, which in turn affects engine performance. During a turn, the engine might struggle to maintain enough power, causing bogging.
  
• Faulty Sensors or Wiring: Some modern machines have sensors that monitor engine load and performance. If these sensors malfunction or wiring becomes loose or damaged, the machine might misinterpret the load during a turn, leading to bogging.
  

Troubleshooting the Motor Bogging Issue
To diagnose and resolve the issue of motor bogging during turns, follow these steps:

1. Check Hydraulic Fluid Levels
   Start by inspecting the hydraulic fluid levels. Low fluid can cause a host of issues, including bogging during turns. If the fluid is low, top it off and check for any signs of leaks. Ensure the fluid is clean and at the correct level.
   
2. Inspect the Hydraulic System
   Examine the hydraulic filter for clogs and replace it if necessary. If there’s air in the hydraulic lines, bleeding the system can help remove the air pockets and restore normal pressure.
   
3. Inspect the Transmission and Drive Components
   Check the transmission for slipping or irregular behavior. If the belts or chains are worn, they should be replaced. Any signs of slipping in the drivetrain should be addressed immediately to prevent further damage.
   
4. Evaluate Engine Performance
   Inspect the air filter and fuel system for any blockages or malfunctions. Ensure the fuel pump is working correctly and that there’s no air trapped in the fuel lines. If the engine seems to lack power during a turn, have it tested by a technician.
   
5. Examine Tires or Tracks
   Check the tires for proper inflation and wear. For tracked machines, inspect the tracks for proper tension and any signs of damage. Worn or mismatched tires or tracks can create unnecessary resistance during turns, leading to bogging.
   
6. Test the Electrical System
   Inspect the battery and electrical connections for any issues. A weak battery or faulty sensors can lead to irregular engine performance, especially under load. Replace any damaged electrical components.
   

Preventing Future Motor Bogging Issues
Once you’ve addressed the root cause of the motor bogging, it’s essential to take preventive steps to avoid future problems:

• Regular Maintenance: Regularly check hydraulic fluid levels, air filters, and tires to ensure everything is in top condition. A well-maintained machine is less likely to experience bogging issues.
  
• Timely Repairs: Address any wear and tear on belts, chains, and hydraulic components before they become a larger issue. Catching problems early can prevent more severe damage later on.
  
• Operator Training: Ensure that operators are properly trained on how to operate the equipment, especially when turning. Harsh or abrupt turns can place extra strain on the engine and drivetrain.
  

Conclusion: Keeping Your Equipment Running Smoothly
Motor bogging when turning can be a frustrating issue, but by understanding the common causes and troubleshooting the problem methodically, operators can resolve the issue and prevent it from recurring. Regular maintenance, proper fluid levels, and attention to the hydraulic and drivetrain systems are key to ensuring that the equipment performs efficiently. By addressing bogging issues promptly, you can keep your machinery running smoothly and avoid costly repairs and downtime.