Engine Identification for the 1967 Caterpillar 950 Loader

[MikePhua]

The Caterpillar 950 is one of the most iconic loaders ever built, widely recognized for its exceptional versatility and rugged performance in the construction and mining industries. Introduced in 1967, the 950 was designed to handle a range of tasks, from loading materials in construction sites to hauling and lifting heavy loads. Over the years, Caterpillar's 950 series loaders have become essential to numerous industries, thanks to their reliability and powerful engines. However, when it comes to identifying the engine in older models, such as the 1967 Caterpillar 950 (Serial No. 58H-00508), owners and operators often face some challenges. Understanding the engine details, specifications, and upgrades is crucial for proper maintenance and repair. This article delves into the history and engine identification of the 1967 CAT 950 loader.
The History of the Caterpillar 950 Loader
The Caterpillar 950 loader is part of the 900 series, which has seen significant evolution in both design and capability since its introduction. Caterpillar, founded in 1925, has long been a leader in the heavy machinery industry, creating innovative equipment that sets industry standards. The 950 loader, launched in the late 1960s, was designed as a versatile, mid-sized loader capable of tackling a range of tasks that required both power and maneuverability. Over the decades, Caterpillar has continuously updated and improved the 950 series, incorporating more advanced engines, hydraulics, and features for greater productivity.
In the case of the 1967 model, the 950 was equipped with a reliable diesel engine designed to provide sufficient power while maintaining fuel efficiency. The engine was a critical component in ensuring the loader could handle heavy-duty applications in construction and mining environments. Despite the advances in engine technology, many operators still rely on these machines today, and understanding their engine specifications is crucial to keeping them running smoothly.
Engine Options in the 1967 CAT 950 Loader
The 1967 Caterpillar 950 loader, identified by the serial number 58H-00508, originally came with a number of engine options depending on the specific configuration and market demands. The most common engine in the 950 was the Caterpillar 3306 diesel engine, which provided a combination of durability, power, and reliability for demanding operations.
The Caterpillar 3306 Diesel Engine

• Displacement: 6.6 liters (402 cubic inches)
  
• Configuration: Inline 6-cylinder
  
• Rated Power: Approximately 125 horsepower (93 kW) at 2,200 rpm
  
• Fuel Type: Diesel
  
• Aspiration: Naturally aspirated
  

The 3306 engine was a popular choice in a wide variety of Caterpillar machines during the 1960s and beyond, known for its performance and longevity. It’s a naturally aspirated engine, meaning it relies on atmospheric pressure for air intake rather than a turbocharger or supercharger. This simplicity made the engine easy to maintain and repair, an important consideration for operators who needed a machine that could be serviced with minimal downtime.
The 3306 engine provided reliable power for the 950 loader, ensuring that it could handle demanding tasks like digging, lifting, and hauling heavy materials. Additionally, the engine's relatively low operating speeds helped improve fuel efficiency, making the 950 a cost-effective solution for operators.
Common Engine Issues and Maintenance Considerations
While the 3306 engine is known for its durability, like all engines, it is not without its maintenance challenges. Over time, components can wear out or suffer from lack of proper care, especially if the machine is subjected to heavy use or poor maintenance practices. Here are some common engine-related issues that owners of the 1967 Caterpillar 950 loader may encounter, along with tips for addressing them:
1. Overheating
Due to the high load conditions that a loader faces, the engine can sometimes overheat, especially if the cooling system isn’t properly maintained. Overheating can be caused by low coolant levels, clogged radiators, or issues with the water pump.

• Solution: Regularly inspect the cooling system, ensuring that the radiator is clear of debris and that coolant levels are maintained. Flush the cooling system at recommended intervals to prevent the build-up of contaminants.
  

2. Fuel System Problems
Older diesel engines, like the 3306, are prone to fuel system issues, including clogged fuel filters, air in the fuel lines, or a faulty fuel pump. These issues can lead to reduced engine performance, misfires, or difficulty starting.

• Solution: Regularly replace fuel filters and inspect the fuel system for leaks. If the engine is having trouble starting, check the fuel lines for air or clogs, and make sure the fuel pump is operating properly.
  

3. Wear and Tear on Engine Components
As with any diesel engine that has been in operation for several decades, the 3306 engine may experience wear and tear on critical components such as the pistons, rings, and bearings. This can result in reduced compression, increased oil consumption, and a loss of power.

• Solution: Keep a close eye on the engine’s oil consumption and listen for any unusual knocking or tapping sounds, which can indicate internal wear. If significant wear is detected, it may be necessary to rebuild or replace the engine components.
  

4. Exhaust System Issues
The exhaust system in the 1967 Caterpillar 950 may also suffer from corrosion or blockages over time. This can lead to poor engine performance, increased emissions, or difficulty starting.

• Solution: Regularly inspect the exhaust system for signs of rust, leaks, or blockages. Cleaning or replacing the exhaust system components as necessary can ensure proper engine operation.
  

Upgrading the Engine for Modern Performance
While the 3306 engine was a great option in the 1960s, many owners of older 950 loaders may consider upgrading the engine for improved performance, fuel efficiency, and emissions control. Modern diesel engines, especially those with turbocharging and advanced fuel injection systems, can offer increased horsepower and torque, allowing the loader to handle even more demanding tasks.

• Engine Swap Considerations: When considering an engine swap for the 1967 CAT 950, it is important to ensure that the new engine is compatible with the loader’s transmission, cooling system, and other components. Many operators opt for newer Caterpillar engines, such as the 3306B or the 3406, both of which offer improved performance and fuel efficiency.
  

Conclusion
The 1967 Caterpillar 950 loader remains a vital piece of equipment in many industries, thanks to its rugged design and powerful performance. Understanding the engine options, particularly the 3306 diesel engine, is crucial for maintaining and operating this machine. By addressing common engine issues such as overheating, fuel system problems, and wear, owners can extend the lifespan of their CAT 950 loaders. Whether opting for the original engine or considering an upgrade, maintaining the engine’s health is key to ensuring optimal performance and reliability on the job site. Regular inspections and timely maintenance can prevent costly repairs and ensure the loader continues to serve its purpose for years to come.