1971 P&H 20-Ton M320T2

[MikePhua]

The P&H 20-Ton M320T2, manufactured in 1971, is a well-regarded piece of heavy equipment primarily used for industrial lifting and material handling. P&H, short for P&H Mining Equipment, has a long history of producing high-quality cranes and material handling equipment, including the M320T2, which remains a noteworthy model in many industries. This machine is recognized for its durability, reliable performance, and rugged design, making it a valuable asset for operations that require consistent lifting power in tough environments.
In this article, we will explore the key features, specifications, and historical context of the P&H 20-Ton M320T2, as well as its common issues, maintenance tips, and relevance in today’s industry.
History of P&H Mining Equipment
Founded in 1884 in Milwaukee, Wisconsin, P&H Mining Equipment is a brand steeped in history. Over the years, the company has produced a wide range of heavy equipment, including surface mining cranes, draglines, and shovels. Known for its innovation and commitment to quality, P&H became a leader in the mining equipment industry.
By the 1970s, P&H had expanded its product offerings to include versatile cranes capable of handling various heavy lifting tasks. The P&H 20-Ton M320T2 was one of these, designed specifically for industrial applications that required precision, durability, and lifting capacity.
P&H 20-Ton M320T2 Features and Specifications
The P&H 20-Ton M320T2 crane was built to perform in environments where reliable and heavy lifting capacity was essential. Here are the key features and specifications that define this model:

• Load Capacity: As the name suggests, the M320T2 has a 20-ton lifting capacity, making it suitable for medium-heavy lifting operations.
  
• Boom Length: The crane is equipped with a telescoping boom, which can be extended or retracted to provide flexibility in handling different lifting heights and distances. The maximum boom length of the M320T2 reaches up to 100 feet (30 meters), offering versatile reach for construction, industrial, and material handling tasks.
  
• Power Source: The M320T2 is typically powered by a diesel engine, which ensures that it delivers consistent, reliable performance. The engine's power output varies, but it generally provides sufficient power to handle the heavy lifting tasks required by this type of crane.
  
• Hydraulic System: The M320T2 uses a hydraulic system for smooth and controlled lifting operations. The hydraulic controls are designed for easy operation and precise control of the crane's lifting capabilities.
  
• Crawling Track System: The crane is mounted on a tracked undercarriage, which allows for stable movement across a variety of terrains, including rough and uneven ground. This track system is beneficial in construction sites or mining areas where mobility is essential, and the ground conditions are not ideal for wheeled equipment.
  
• Cabin and Operator Comfort: The M320T2 features an enclosed operator's cabin, which provides the operator with a clear view of the work area while also ensuring protection from the elements. The cabin is equipped with necessary controls to operate the crane efficiently, although it may not have modern ergonomic features found in more recent models.
  

Applications and Use Cases
The P&H 20-Ton M320T2 crane was designed with a broad range of applications in mind. Some of the most common uses include:

• Construction: The crane is often employed on construction sites for lifting heavy materials, such as steel beams, concrete pipes, or prefabricated components. Its lifting capacity and telescoping boom make it an excellent choice for high-rise construction and structural work.
  
• Industrial Material Handling: In industrial settings, the M320T2 is used to move heavy loads around manufacturing facilities, warehouses, or refineries. It is capable of handling oversized equipment, containers, or materials that need to be moved or repositioned within the site.
  
• Mining: Given P&H’s history in the mining industry, the M320T2 is often found in mining operations where heavy lifting of equipment, materials, and supplies is required. Its track-based mobility and ability to handle large loads make it ideal for working in difficult terrains typical in mining environments.
  

Common Issues and Troubleshooting
While the P&H 20-Ton M320T2 is known for its reliability, like any older piece of equipment, it is susceptible to certain wear and tear over time. Some of the most common issues include:

• Hydraulic System Leaks: Over time, the hydraulic system may develop leaks due to seals and hoses degrading. It’s essential to regularly inspect the hydraulic lines and connections to prevent loss of lifting power or failure of critical functions.
  
• Track Wear: The tracked undercarriage can experience wear due to constant movement across rough terrain. Track tension needs to be checked periodically, and worn or damaged tracks must be replaced to ensure smooth operation.
  
• Engine and Fuel System Problems: The diesel engine powering the M320T2 requires regular maintenance, including oil changes and fuel filter replacement. Issues such as poor fuel quality or clogged filters can result in reduced engine performance, making it difficult to meet the lifting demands of the machine.
  
• Worn Brake Pads: The braking system may experience wear over time, which could affect the crane’s ability to stop efficiently. It's important to inspect the brake pads and adjust or replace them when necessary to avoid safety risks.
  

Maintenance Tips for the P&H 20-Ton M320T2
To keep the P&H 20-Ton M320T2 running smoothly, regular maintenance is essential. Below are some maintenance tips to extend the life of the crane:

• Inspect Hydraulic Fluids: Check hydraulic fluid levels regularly, and ensure that the fluid is clean and free from contamination. Change the fluid according to the manufacturer’s recommendations to maintain optimal performance.
  
• Track Maintenance: Regularly inspect the tracks for wear and tear. Ensure that the tracks are properly tensioned and replace any damaged sections of the track system.
  
• Engine Maintenance: Regularly change the oil and fuel filters, and ensure that the air filter is clean to maintain engine performance. Be mindful of fuel quality, as poor-quality fuel can damage the engine over time.
  
• Brake System Check: Periodically check the brake system, especially the pads and hoses. If you notice any issues with braking performance, make adjustments or replace the parts as necessary.
  

Conclusion
The 1971 P&H 20-Ton M320T2 crane is a durable and versatile machine that has served numerous industries for decades. Despite its age, it remains a reliable option for lifting heavy materials in construction, mining, and industrial applications. Regular maintenance and troubleshooting are key to keeping the crane operational and extending its lifespan.
With its rugged design, powerful hydraulic system, and track-based mobility, the P&H 20-Ton M320T2 remains an essential tool in heavy lifting operations. By addressing common issues early and following a routine maintenance schedule, operators can continue to get the most out of this remarkable crane for years to come.