The CAT 955K: A Legacy of Versatility and Power in Compact Track Loaders

[MikePhua]

The CAT 955K is one of the most iconic pieces of equipment produced by Caterpillar in the mid-20th century. A tracked loader that could easily be mistaken for an early workhorse of modern earthmoving equipment, the 955K became a staple on job sites across the world. Designed for tough tasks and equipped with features that were ahead of its time, the 955K proved to be a durable, versatile, and valuable machine for a variety of industries. Even though it was produced during the 1950s and 1960s, the 955K remains highly regarded by collectors, enthusiasts, and operators who work with older equipment.
This article explores the CAT 955K in detail, discussing its history, specifications, performance, and why it remains relevant today for those seeking a reliable dozer/loader combo.
The History and Development of the CAT 955K
Caterpillar has long been a leader in the design and manufacturing of heavy construction equipment, and the 955K is one of the notable products of their mid-20th-century engineering prowess. Introduced in the early 1950s, the 955K was part of the K-series of Caterpillar equipment and was a notable upgrade over previous models.
Caterpillar's intention behind the 955K was to provide a loader that could function in a wide range of construction and earthmoving tasks. Unlike traditional wheel loaders, the 955K used tracks, giving it better traction and stability in uneven, muddy, or rocky terrain. This made it a versatile choice for not just construction, but also forestry, mining, and even military applications.
With its 4-in-1 bucket, rugged build, and powerful engine, the CAT 955K quickly became one of the most sought-after machines in its class. It offered power and flexibility in a compact package, allowing it to navigate tight spaces that were inaccessible to larger dozers and loaders. As a result, it found widespread use in everything from small-scale construction projects to road building, utility work, and even land reclamation.
Specifications of the CAT 955K
While the CAT 955K is now considered a classic, its specifications were considered impressive for its time. Here are some of the key features that defined the machine:

• Engine: The CAT 955K was powered by a 4-cylinder, 3304D diesel engine that produced around 75 horsepower. This engine, although smaller than modern engines, provided adequate power for the machine's weight and size, and contributed to its reputation for reliability.
  
• Operating Weight: The 955K weighed approximately 20,000 pounds (about 9,070 kg), making it one of the more compact yet powerful dozers/loaders in its class. Its moderate weight made it easy to transport and maneuver in confined spaces, while still providing enough power to handle substantial earthmoving tasks.
  
• Hydraulics: The 955K utilized hydraulic arms for its bucket and lifting capabilities, giving it the power to handle a variety of attachments. The hydraulic system in the 955K was an improvement over earlier mechanical systems, providing greater precision in lifting and loading tasks.
  
• Track System: The tracks on the 955K were a key feature, offering superior traction compared to wheeled loaders. This allowed it to operate in soft, muddy, or uneven terrain without getting stuck, a significant advantage over its wheeled counterparts. The track design helped distribute weight more evenly, preventing the machine from sinking into soft ground and reducing the risk of damage to paved surfaces.
  
• Bucket Capacity: The 955K’s 4-in-1 bucket design provided flexibility and allowed it to be used for various tasks such as lifting, pushing, and digging. The bucket could also function as a dozer blade, allowing the operator to clear debris, level earth, or move large amounts of material. Its capacity ranged from 0.6 to 1 cubic yard, depending on the bucket configuration.
  

The Versatility and Applications of the CAT 955K
One of the standout qualities of the CAT 955K is its versatility. Whether it was clearing land, digging trenches, moving dirt, or even working in quarries, the 955K was a machine capable of handling a wide array of tasks with ease. Here are some of the most common applications where the 955K thrived:

1. Construction Sites: With its combination of dozing and loading capabilities, the 955K was used extensively on construction sites, especially for smaller-scale jobs that required compact equipment. Its ability to move material quickly and efficiently made it invaluable for grading, site preparation, and foundation work.
   
2. Land Clearing and Forestry: The 955K was frequently used in land clearing operations, especially in rural or undeveloped areas. It could clear brush, trees, and stumps with ease and was particularly useful for forestry operations where space was tight and maneuverability was key.
   
3. Quarrying and Mining: The 955K’s rugged design and powerful hydraulic system made it ideal for use in quarries and mining operations. It could move large volumes of rock and other materials, and its track system allowed it to operate in challenging conditions often found in these environments.
   
4. Agricultural Work: Due to its compact size and strong lifting capabilities, the 955K was also used on farms for tasks like digging irrigation channels, moving soil, or preparing fields for planting. The machine’s versatility allowed it to perform a variety of functions on agricultural properties.
   
5. Military and Industrial Uses: The 955K was also used in military applications during the post-World War II period. Its ability to operate in rough conditions and move materials made it a useful tool for military construction projects, and it found use in some industrial applications that required a reliable, compact bulldozer.
   

Maintenance and Common Issues with the CAT 955K
As with any older machine, regular maintenance is key to ensuring that the CAT 955K remains operational. Fortunately, many parts are still available, both from Caterpillar and aftermarket suppliers. Here are a few common maintenance tips and issues to keep in mind:

1. Hydraulic System Maintenance: The hydraulic system on the 955K is essential for its operation, and regular checks are needed to ensure that there are no leaks and that the fluid is at proper levels. Keeping the hydraulic system in good working order is crucial for maintaining the loader’s efficiency and lifting power.
   
2. Track and Undercarriage Maintenance: Given that the 955K uses tracks, inspecting the track system for wear and tear is essential. The tracks should be regularly tensioned, and any damage to the sprockets, rollers, or links should be addressed promptly to avoid costly repairs.
   
3. Engine and Cooling System: Like many older machines, the engine on the 955K requires regular maintenance, including oil changes, air filter replacement, and coolant checks. It is also important to check for any signs of overheating, especially during extended work hours in hot environments.
   
4. Brake and Steering System: The 955K's braking and steering systems should be regularly inspected for wear, especially if the machine has seen heavy use. Brake fluid levels, wear on brake pads, and the condition of the steering linkages should all be checked regularly to ensure the machine remains safe to operate.
   

Why the CAT 955K Still Holds Value Today
The CAT 955K’s legacy as a versatile and rugged piece of machinery has allowed it to maintain a loyal following, even decades after it was first produced. Collectors and operators alike appreciate its ability to tackle a wide variety of tasks with simplicity and reliability.
Today, the 955K is often found in niche applications, especially in industries that prefer older, proven equipment. While modern machinery may surpass the 955K in terms of fuel efficiency, comfort, and advanced technology, its ruggedness and versatility ensure that it still has a place in many operations.
Conclusion
The CAT 955K is a testament to Caterpillar’s commitment to building durable, versatile machinery. While newer equipment has taken over in many areas, the 955K remains a reliable and respected machine in the world of earthmoving. Whether it’s being used on a construction site, a farm, or even a military base, the 955K’s adaptability and ruggedness ensure that it will continue to be a valuable tool for those who need a workhorse that can handle a wide range of tasks. For those in the market for a classic dozer/loader combo, the CAT 955K is a piece of history that still holds its value and usefulness today.