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CAT 955C Crawler Loader: Understanding Its Features, Performance, and Common Issues
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The CAT 955C Crawler Loader is one of Caterpillar’s most iconic machines, known for its rugged build and versatility in various construction and earthmoving tasks. This loader, introduced as part of the 955 series, was designed to be a workhorse capable of handling everything from material handling to dozing and trenching.
In this article, we will explore the history and features of the CAT 955C, its technical specifications, and the common issues owners and operators face. We will also provide useful tips for maintenance and troubleshooting to keep this machine running at its best.
The Legacy of the CAT 955C
Introduced in the 1960s, the CAT 955C was part of Caterpillar’s effort to produce more compact and versatile loaders that could tackle a wide range of jobs. Over the years, the 955 series became a staple on job sites across the world, particularly in heavy-duty applications such as road construction, mining, and forestry.
The 955C version, specifically, was built with an upgraded powertrain, better hydraulic systems, and improved ergonomics. These upgrades made it one of the most reliable and powerful loaders in its class. With a powerful engine, good lifting capabilities, and excellent traction, the 955C quickly became favored by operators who needed a rugged machine that could work in tough environments.
While the 955C is no longer in production, its legacy continues with many machines still in operation today, especially in regions where older equipment is favored due to its durability and ease of maintenance.
Key Specifications and Features
The CAT 955C is equipped with several features that made it stand out among its competitors:
  • Engine Power: The 955C was powered by a Caterpillar D333 engine, offering approximately 125 horsepower. This provided ample power to lift heavy loads and operate attachments with ease.
  • Transmission: A torque converter with a four-speed transmission helped the 955C perform efficiently in varied terrain. The torque converter provides smoother operation by compensating for differences in engine and machine speed.
  • Hydraulic System: The 955C is equipped with a hydraulic system that provides sufficient flow to operate attachments like dozer blades and winches. Its reliable hydraulics ensured the machine could perform demanding tasks without sacrificing control or precision.
  • Weight and Dimensions: The 955C had an operating weight of around 17,000 lbs, which allowed it to provide good balance between maneuverability and lifting power. It had a loader bucket capacity of approximately 1.5 cubic yards.
  • Crawler Tracks: The 955C utilized heavy-duty crawler tracks, ensuring excellent traction on rough terrain and reducing ground pressure. This feature made it ideal for construction sites with uneven or soft soil conditions.
Common Issues with the CAT 955C
Despite its reputation for being a robust machine, the CAT 955C is not immune to mechanical issues. Operators and mechanics working with the 955C often report the following common problems:
  1. Hydraulic System Failures
    • One of the most common issues with the 955C is hydraulic system failure. Given the demands placed on the hydraulic system for lifting and pushing tasks, hydraulic pumps, hoses, and seals may wear out over time. Leaks or a loss of pressure can lead to a decrease in performance, especially when operating attachments.
    • Solution: Regularly check the hydraulic fluid levels and inspect hoses and seals for signs of wear. Replacing worn-out components and maintaining the hydraulic system regularly can prevent more significant issues.
  2. Transmission Problems
    • Some 955C owners report issues with the transmission slipping or not shifting properly. These issues may arise due to worn-out clutches or a malfunctioning torque converter.
    • Solution: Regular transmission fluid changes are essential to keep the system operating smoothly. Additionally, if the transmission is slipping, the torque converter may need inspection and possible rebuilding.
  3. Track and Undercarriage Wear
    • As a crawler loader, the 955C relies on its undercarriage and tracks to maintain traction. Over time, the tracks may wear down, leading to decreased efficiency and potential stability issues.
    • Solution: Routine inspection of the undercarriage, including the tracks, rollers, and sprockets, can identify wear before it becomes a major issue. Track adjustment is also essential to ensure proper tension and alignment.
  4. Engine Performance Issues
    • Some operators have noted issues with the engine not starting or running inefficiently, especially in colder weather. This could be due to faulty fuel injectors, a worn-out fuel pump, or other engine components that have degraded over time.
    • Solution: Regular engine maintenance, including fuel system cleaning and periodic checks of the ignition system, will help prevent these issues. A complete engine overhaul may be necessary if performance issues persist.
  5. Electrical Problems
    • Electrical failures, such as issues with the alternator or wiring problems, can occur in older models like the 955C. These problems can lead to power loss or complete failure of the electrical system.
    • Solution: Regular inspection of the wiring and electrical components is essential. Replacing corroded wires and ensuring that connections are tight will prevent most electrical issues.
Maintenance Tips for Prolonged Life
To ensure that your CAT 955C operates smoothly for many years, regular maintenance is key. Here are a few tips for maintaining your 955C loader:
  • Hydraulic System Maintenance: Check hydraulic oil regularly and replace filters to prevent contamination. Keep an eye on hydraulic lines for any leaks or signs of wear.
  • Engine Maintenance: Keep the engine clean, check the oil regularly, and replace the air filters to ensure the engine runs efficiently. Inspect fuel injectors periodically for clogs or leaks.
  • Track Inspection: Make sure the tracks are in proper tension and check for wear. Track pads should be inspected for cracks, and track links should be checked for signs of elongation.
  • Transmission Care: Change the transmission fluid at regular intervals and check for leaks around the seals. A well-maintained transmission will extend the life of your loader.
  • Electrical System: Regularly inspect the electrical wiring, check the battery condition, and ensure that all fuses and relays are working as they should.
Conclusion
The CAT 955C Crawler Loader remains a valuable machine for operators who need a durable, versatile machine capable of handling tough jobs. While it has some common issues such as hydraulic leaks, engine performance problems, and track wear, these can generally be managed through regular maintenance and prompt repairs. For anyone working with a 955C, understanding its systems and troubleshooting tips can help prolong its life and maintain peak performance.
Whether you’re a seasoned operator or someone considering purchasing a used 955C, keeping the machine in good working condition requires diligence. Regular inspections, preventative maintenance, and addressing issues early will ensure that your 955C continues to serve you well for many more years.
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