Understanding and Maintaining the CAT 955L

[MikePhua]

Introduction: The CAT 955L - A Legacy of Durability
The CAT 955L is a renowned model from Caterpillar, known for its rugged reliability and versatility in heavy equipment operations. This track loader, introduced in the late 1960s, has earned its place in construction, mining, and industrial operations, performing a wide range of tasks from digging to material handling.
For many operators and owners, keeping the 955L in top shape is paramount to maintaining productivity on job sites. Whether you’re troubleshooting a specific problem or performing routine maintenance, understanding the key components and their functions is essential.
In this article, we’ll take a closer look at common issues, maintenance practices, and practical tips for extending the life of the CAT 955L, offering both seasoned operators and newcomers valuable insights.
Common Issues with the CAT 955L
Despite being a durable machine, the CAT 955L is not immune to common operational issues, especially considering its age. Some of the most frequently encountered problems with this model include:

1. Hydraulic System Problems: The hydraulic system on the 955L can experience issues such as leaks or reduced power, often due to wear in the hydraulic pump or the hoses. Keeping the hydraulic oil clean and the system free from contaminants is crucial to avoiding major failures.
   
2. Engine Stalling or Poor Performance: Engine problems are another common issue. These can stem from fuel starvation, clogged air filters, or issues with the fuel system. Regular fuel filter replacements and air filter maintenance can help prevent engine stalling and sluggish performance.
   
3. Transmission Issues: Some users have reported problems with the transmission, including slipping or harsh shifting. These issues are often the result of low transmission fluid levels, dirty fluid, or worn seals. Regular checks and fluid changes are key to keeping the transmission running smoothly.
   
4. Track Wear and Tension: Like many tracked machines, the CAT 955L experiences wear on its tracks, particularly in heavy-duty applications. If the tracks are not properly maintained, it can lead to uneven wear or damage to the undercarriage components, such as the sprockets or rollers.
   
5. Electrical and Wiring Failures: As with many older machines, the electrical system on the CAT 955L may experience issues with wiring, fuses, or battery connections. Regularly inspecting the wiring for signs of wear or corrosion can prevent electrical failures in the future.
   

Troubleshooting Tips for CAT 955L Owners
When faced with issues, diagnosing the problem promptly and accurately can save both time and money. Here are some troubleshooting steps to help resolve common issues with the CAT 955L:

1. Hydraulic System Troubleshooting:
   • Check for fluid leaks in the hoses and fittings. If you notice a drop in fluid levels, replace the damaged hose or fitting.
     
   • Clean the hydraulic fluid filter regularly and replace it if necessary.
     
   • Inspect the hydraulic pump for signs of wear or damage. If the pump is malfunctioning, consider replacing it to avoid further damage to the system.
     
2. Engine Performance:
   • If the engine stalls or runs rough, check the fuel filter and replace it if it’s clogged. A clogged air filter can also impede engine performance, so make sure to clean or replace it.
     
   • Ensure that the fuel lines are free from air pockets. Bleed the fuel system to remove any trapped air that could affect engine performance.
     
   • Regularly inspect the fuel pump to ensure it is operating at the correct pressure.
     
3. Transmission Care:
   • Always check the transmission fluid level before operating the machine. Low fluid levels can cause slipping or harsh shifting.
     
   • Examine the fluid for contaminants and change it if it appears dirty or contaminated.
     
   • If the transmission is slipping, inspect the seals and bearings to determine if they are worn and need replacement.
     
4. Track and Undercarriage Maintenance:
   • Inspect the tracks for wear or damage. If the track tension is too tight or too loose, adjust it to the recommended specifications.
     
   • Regularly check the rollers and sprockets for wear and replace them if they show significant signs of damage.
     
   • Keep the undercarriage clean and free from debris that could cause premature wear.
     
5. Electrical System Checks:
   • Periodically inspect the wiring for signs of wear, corrosion, or fraying. If you find any issues, replace the damaged wires to prevent electrical failures.
     
   • Test the battery regularly to ensure it is charging correctly and holding a charge.
     
   • Check the fuses and circuit breakers to ensure that the electrical system is functioning correctly.
     

Routine Maintenance for Long-Term Reliability
Routine maintenance is crucial for ensuring the longevity and reliability of the CAT 955L. Here’s a general maintenance checklist to follow:

1. Daily Maintenance:
   • Check the fluid levels for the engine oil, hydraulic oil, and transmission fluid.
     
   • Inspect the tracks and undercarriage for damage or wear.
     
   • Check the battery and wiring for any signs of corrosion or loose connections.
     
   • Clean the air filters to prevent engine clogging.
     
2. Weekly Maintenance:
   • Inspect the hydraulic hoses and fittings for leaks.
     
   • Clean the machine, especially the undercarriage, to prevent the buildup of dirt and debris.
     
   • Test the electrical system to ensure everything is functioning properly.
     
3. Monthly Maintenance:
   • Change the engine oil and replace the oil filter.
     
   • Inspect and clean the fuel system, including the fuel filters and lines.
     
   • Lubricate the machine’s moving parts, including the tracks, pins, and bearings.
     
4. Seasonal Maintenance:
   • Replace the hydraulic fluid and filters.
     
   • Check the cooling system for any blockages or leaks.
     
   • Inspect the transmission fluid and change it if necessary.
     

Tips for Extending the Life of the CAT 955L
The CAT 955L is a tough, workhorse machine, but like any piece of heavy equipment, it requires proper care to remain operational for many years. Here are a few additional tips to help extend its lifespan:

• Keep the machine clean: Regularly cleaning the machine helps prevent dirt and debris from building up in critical areas such as the engine, hydraulics, and undercarriage.
  
• Follow a proper lubrication schedule: Keeping the machine properly lubricated reduces friction and wear on moving parts.
  
• Store the machine properly: When not in use, store the 955L in a dry, protected area to prevent rust and deterioration of its components.
  

Conclusion: Maintaining the CAT 955L for Maximum Efficiency
The CAT 955L continues to be a reliable machine for many industries, despite its age. Proper maintenance, early detection of issues, and routine care will ensure that it continues to operate smoothly for years. By following the troubleshooting steps and maintenance guidelines provided in this article, you can keep your 955L in excellent working condition.
While it may be an older model, the CAT 955L’s legacy of toughness and durability makes it an invaluable piece of equipment. Whether you’re dealing with engine stalling, hydraulic system issues, or track wear, understanding the common problems and solutions can help keep this powerful machine performing at its best.