Bucket Bushing Maintenance for Bobcat 763

[MikePhua]

Introduction
The Bobcat 763 is a popular skid steer loader used in various construction and landscaping tasks. One of the most important components to maintain is the bucket and its bushings. Bucket bushings are crucial for the smooth operation of the machine, providing support to the bucket and minimizing wear. Over time, these bushings can wear out, leading to issues with bucket movement, increased friction, and possible damage to the loader. In this article, we will discuss common problems with bucket bushings, how to identify them, and the steps involved in replacing or maintaining these components.
Common Problems with Bucket Bushings

1. Excessive Wear
   Bucket bushings can wear out over time due to constant movement and heavy load-bearing. When this happens, the bucket may not move smoothly, or it may start to make noise during operation. This wear can also cause the bucket to misalign, making it difficult to lift or carry loads properly.
   Signs of Excessive Wear:
   • The bucket does not function smoothly or freely.
     
   • The machine produces unusual sounds, such as grinding or clanking, when the bucket moves.
     
   • The bucket appears misaligned or loose when attached to the loader.
     
2. Rust and Corrosion
   Exposure to moisture and harsh environmental conditions can cause rust and corrosion to develop on the bucket bushings. This can further accelerate wear and make the bushings less effective. Rust also increases the friction between moving parts, leading to potential damage to the surrounding components.
   Signs of Rust and Corrosion:
   • Visible rust or discoloration on the bushings.
     
   • Difficulty in moving the bucket, with signs of resistance.
     
   • Seized bushings that do not allow smooth bucket movement.
     
3. Misalignment or Looseness
   Sometimes, bucket bushings can become misaligned or loose, causing the bucket to move improperly. This can happen if the bushings were not installed correctly or if they have worn down excessively. Misalignment can lead to uneven wear on the bucket or even cause the loader's arms to become damaged.
   Signs of Misalignment or Looseness:
   • The bucket wobbles or feels unstable when lifting or tilting.
     
   • The loader arms seem to be moving in an uneven or jerky motion.
     
   • The bucket is not centered or is tilted to one side during operation.
     

Replacing or Maintaining Bucket Bushings

1. Inspect the Bushings Regularly
   Regular inspection of the bucket and its components is essential to identify early signs of wear or damage. Check for play or excessive movement in the bucket during operation, as this could indicate bushing wear. Look for rust, misalignment, or other signs that the bushings may need replacing.
   Inspection Tips:
   • Use a flashlight to examine the bushings for rust or wear.
     
   • Move the bucket through its full range of motion and listen for any unusual noises.
     
   • Check the tightness of bolts and fasteners around the bucket and arms to ensure there are no loose parts.
     
2. Replacing Worn Bushings
   If the bushings are worn beyond repair, they will need to be replaced. Replacing bucket bushings on the Bobcat 763 requires some mechanical knowledge and tools, but it can be done with proper care. Here is a general guide to the replacement process:
   Steps for Replacing Bucket Bushings:
   • Lift the Loader: Use the loader’s hydraulic system to lift the bucket off the ground.
     
   • Remove the Bucket: Detach the bucket from the loader arms by loosening the pins and fasteners.
     
   • Remove the Old Bushings: Use a bushing puller or other appropriate tool to remove the worn bushings from the bucket and loader arms.
     
   • Clean the Bushing Area: Thoroughly clean the area where the new bushings will be installed, removing any debris or rust.
     
   • Install New Bushings: Insert the new bushings into place and make sure they are securely seated.
     
   • Reattach the Bucket: Reattach the bucket to the loader arms, making sure the pins and fasteners are properly tightened.
     
3. Lubrication and Maintenance
   After replacing the bushings, it’s essential to lubricate them properly to ensure smooth operation and to reduce wear. Use the recommended lubricant for the Bobcat 763 and apply it to the bushings regularly. This will help prevent rust, reduce friction, and prolong the life of the new bushings.
   Lubrication Tips:
   • Apply grease to the bushings before and after heavy use.
     
   • Lubricate the pivot points of the bucket and loader arms.
     
   • Check for excess grease buildup and clean off any excess.
     

Preventative Measures to Extend the Life of Bucket Bushings

1. Avoid Overloading the Bucket
   Overloading the bucket puts extra strain on the bushings and other components, causing them to wear out prematurely. Ensure that the Bobcat 763 is not overloaded and that you are working within the machine’s rated capacity.
   
2. Keep the Bucket Clean
   Keeping the bucket clean is essential to maintaining the bushings. Dirt and debris can build up in the bushing area, increasing wear. Clean the bucket and its components regularly, especially after working in muddy or sandy conditions.
   
3. Protect Against Moisture and Corrosion
   To prevent rust and corrosion from developing on the bushings, store the machine in a dry place and consider using rust inhibitors if working in wet conditions. Apply a coat of protective oil or grease to the bushings to create a barrier against moisture.
   

Conclusion
Maintaining the bucket bushings on your Bobcat 763 is essential for smooth operation and the longevity of the machine. Regular inspection, timely replacement, and proper lubrication are key factors in preventing costly repairs. By addressing wear, rust, misalignment, and other issues promptly, you can ensure that your machine continues to perform at its best, minimizing downtime and maximizing productivity. If you're unsure about replacing the bushings yourself, it's always a good idea to consult a professional mechanic for assistance.