Effective Techniques for Mustang 940 Pivot Pin Removal: Tips and Best Practices

[MikePhua]

The Role of Pivot Pins in Mustang 940 Skid Steers
Pivot pins are crucial components in the suspension and articulation systems of skid steer loaders like the Mustang 940. These pins enable smooth movement of the loader arms, allowing for precise control and heavy lifting. Over time, pivot pins can wear out, become corroded, or seize due to dirt and lack of lubrication, necessitating their removal and replacement to maintain optimal machine performance.
Challenges in Removing Pivot Pins
Removing pivot pins on machines such as the Mustang 940 is often a tough task. The pins are designed to fit tightly to prevent any play, and environmental factors like rust, dirt, and mechanical stress make extraction difficult. Common issues include pins being stuck fast, damage to surrounding bushings, and the risk of bending or breaking tools if excessive force is applied incorrectly.
Operators have reported that simply hammering the pins out can cause damage to the loader arms or even the pins themselves, increasing repair costs. Additionally, working in tight spaces and heavy components complicates the removal process.
Recommended Tools and Methods
A careful, methodical approach combined with the right tools makes pivot pin removal more efficient and less risky:

1. Penetrating Oils and Soaking Time
   Applying penetrating oil to the pivot pin area several hours or even overnight can soften rust and loosen debris. This is a widely recommended first step by mechanics.
   
2. Use of Hydraulic Press or Pin Press Tools
   Specialized hydraulic pin presses are ideal for applying steady, controlled pressure to push the pins out without damage. These tools distribute force evenly, reducing the chance of bending pins or damaging loader components.
   
3. Heat Application
   Heating the surrounding metal with a torch can expand the housing slightly, easing pin removal. This method should be done carefully to avoid overheating seals or weakening metal.
   
4. Mechanical Impact Tools
   For stubborn pins, air or electric impact tools with appropriate punches can be used, but caution is necessary to avoid excessive force.
   
5. Support and Safety
   Supporting the loader arms securely before removal prevents sudden movements. Personal protective equipment such as gloves and eye protection is essential given the physical nature of the work.
   

A Related Story from the Field
A heavy equipment mechanic once shared a story of a Mustang 940 whose pivot pin was so seized that it took two days of soaking, heating, and incremental pressing before it budged. The mechanic emphasized patience and the importance of using the correct tools. They recalled how previous attempts by less experienced operators resulted in damaged bushings and costly replacements. This experience highlights the value of knowledge and proper technique in routine maintenance.
Industry Trends and Improvements
In recent years, manufacturers have begun to use improved materials and coatings for pivot pins and bushings to reduce corrosion and wear. Additionally, some newer skid steer designs incorporate easier-to-service linkage systems with quick-release pins or modular components, simplifying maintenance.
Conclusion
Removing pivot pins on the Mustang 940 requires a combination of patience, the right tools, and proper technique. Applying penetrating oil, using hydraulic presses, and cautiously applying heat are proven strategies that minimize damage and downtime. Learning from field experiences and industry advances helps operators maintain their machines efficiently and safely, ensuring long service life and reliable performance.