CAT 955 12A: Common Issues and Maintenance Tips

[MikePhua]

Introduction to the CAT 955 12A
The CAT 955 12A is a track loader from Caterpillar’s 955 series, known for its rugged performance in tough construction and earthmoving tasks. Despite its durability, like any heavy equipment, it is prone to wear and tear, which can lead to various issues over time. In this article, we’ll explore some common problems faced by CAT 955 12A owners and operators, along with maintenance tips to ensure the machine’s longevity and optimal performance.
Common Issues with the CAT 955 12A
Several common problems can arise in the CAT 955 12A, often related to its engine, hydraulics, and transmission systems. Understanding these issues can help operators identify and address problems early, saving time and money on repairs.

1. Engine Starting Problems
   

One of the most frequent issues with older CAT 955 12A loaders is difficulty starting the engine. This problem could stem from various causes, such as weak batteries, fuel system malfunctions, or ignition problems.

• Symptoms: The engine cranks but doesn’t start, or it starts intermittently.
  
• Solution: Start by checking the battery condition and replacing it if needed. Inspect the fuel system for clogs or air in the fuel lines. Additionally, check the starter motor and ignition system for wear.
  

1. Hydraulic System Leaks
   

Hydraulic issues are common in older CAT 955 12A loaders, with leaks being a typical concern. Hydraulic fluid leaks can lead to a loss of power in the loader’s arms, bucket, or other attachments.

• Symptoms: Low hydraulic pressure, slow or jerky arm movements, or visible fluid leaks.
  
• Solution: Inspect the hydraulic hoses and connections for wear or cracks. Check the hydraulic pump and cylinders for leaks and replace any damaged parts. Regularly change the hydraulic fluid and replace filters to maintain optimal performance.
  

1. Transmission Problems
   

Transmission issues can also arise in the CAT 955 12A, especially in older models. Problems such as slipping, hard shifting, or unusual noises in the transmission may occur.

• Symptoms: Difficulty shifting gears, slipping in higher gears, or unusual noises during operation.
  
• Solution: Check the transmission fluid level and condition, and change it if necessary. Inspect the clutch, linkage, and gear components for wear. If issues persist, a more in-depth inspection by a professional may be required.
  

1. Overheating
   

Overheating can occur due to a variety of reasons, including poor maintenance, inadequate coolant levels, or a malfunctioning radiator. Overheating can cause serious damage to the engine and other components.

• Symptoms: High engine temperature readings, steam or smoke from the engine compartment.
  
• Solution: Check the coolant level and top it off if necessary. Inspect the radiator for blockages, leaks, or signs of wear. Ensure the fan is working correctly and clean any dirt or debris that may be obstructing airflow.
  

1. Track and Undercarriage Wear
   

The undercarriage of the CAT 955 12A, particularly the tracks, can experience significant wear and tear, especially in tough working conditions. Worn tracks can cause a decrease in traction and efficiency.

• Symptoms: Loose or worn tracks, uneven wear on the tracks, or decreased performance in muddy or soft ground.
  
• Solution: Regularly inspect the tracks for wear and replace them when they become too thin or damaged. Check the undercarriage components, including the sprockets and rollers, for wear and replace them as needed. Keep the undercarriage clean to prevent the buildup of debris that could cause additional wear.
  

Maintenance Tips for the CAT 955 12A
To ensure that your CAT 955 12A loader operates efficiently and lasts as long as possible, regular maintenance is essential. Here are some tips to help you maintain the machine:

1. Change Fluids Regularly
   

Regularly changing the engine oil, hydraulic fluid, and transmission fluid is crucial to the performance and longevity of your CAT 955 12A. Follow the manufacturer’s recommended intervals for fluid changes to ensure proper lubrication and cooling of the components.

1. Inspect and Replace Filters
   

Clogged or dirty filters can affect the performance of the engine, hydraulic system, and transmission. Make sure to check and replace air, fuel, oil, and hydraulic filters regularly to prevent system failures.

1. Check for Leaks
   

Leaks, especially in the hydraulic system, can lead to a significant loss of performance. Routinely inspect hydraulic hoses, pumps, and cylinders for any signs of leakage, and replace any damaged parts immediately.

1. Clean the Cooling System
   

Keep the radiator, fan, and cooling fins free of dirt and debris to ensure optimal engine cooling. Overheating can be prevented by maintaining the cooling system in good condition. Clean the system regularly, particularly after working in dusty or dirty conditions.

1. Maintain Track and Undercarriage Components
   

The undercarriage and tracks should be inspected regularly for wear and tear. If tracks are loose or showing signs of excessive wear, replace them before they cause further damage. Also, regularly inspect sprockets, rollers, and other undercarriage components for wear and replace as necessary.

1. Inspect the Electrical System
   

The electrical system, including the battery and starter motor, should be checked regularly for proper function. If the machine struggles to start or if you notice any electrical issues, inspect the wiring for corrosion or loose connections.

1. Follow Manufacturer Recommendations
   

Always refer to the operator’s manual for maintenance intervals and specific recommendations for your CAT 955 12A loader. The manufacturer’s guidelines are crucial for maintaining the equipment’s performance and avoiding costly repairs.
When to Seek Professional Help
If you experience persistent or complex issues with your CAT 955 12A, it may be time to seek professional help. Issues such as deep transmission malfunctions, severe hydraulic leaks, or engine failures may require specialized knowledge and tools. A certified Caterpillar technician will be able to diagnose the problem and recommend the appropriate repairs.
Conclusion
The CAT 955 12A loader is a workhorse that can handle a wide variety of heavy-duty tasks. However, like all machinery, it requires regular maintenance to keep it running smoothly. By understanding common issues such as engine starting problems, hydraulic leaks, transmission issues, overheating, and undercarriage wear, operators can take proactive steps to maintain the machine and extend its life. Regular inspections, fluid changes, and proper care are essential for ensuring the CAT 955 12A continues to perform at its best.