Oil seals are used on the final drive motor axle to keep the gear oil for the planetary gear set or bearings from mixing with hydraulic oil. These seals are vital to the operation and performance of your final drive motor -- and learning how they can fail is essential.
In a previous post, we talked about basic mechanical stress -- but this one is going a step further and looking at the relationship between stress, deformation, and strain -- all of which affect how metal parts break.
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Mechanical stress is behind any of the failures we encounter when inspecting a final drive motor. Sheared fasteners, bent gear teeth, dented roller bearings, and broken races are examples of where stresses have gotten high enough to do permanent damage. To help you learn more about the mechanisms behind this and other types of failure, we'd like to introduce you to a new blog series entitled Dr. Mac's Notebook.
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Simple Forces
There are three basic types of forces:
- Compressive, which pushes things together
- Tensile, which pulls things apart
- Shear, which causes things to slide apart
Not all final drive motor failures are equal! Some are just horrifying ...
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The planetary gear system is key to helping your final drive motor generate the torque needed to move your equipment and transport heavy loads. When it goes out, everything literally comes to a grinding halt. Learn the signs of impending planetary gear failure!
Here are a few other Shop Talk Blog posts you might find of interest ...
Not all contamination related failures are catastrophic --
but if the symptoms are ignored, they will be!
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Hydraulic contamination is a serious problem for final drive motors, and even more so for newer models that have tighter clearances. In this Shop Talk Blog post, we are going to discuss some of the results of hydraulic contamination and how to prevent them. It's easier than you may think!
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A good number of the failed Bobcat final drive motors we see come in are related to the case drain filter. Here's why -- and how to keep it from happening to you!
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In our continuing discussion on some of the worst final drive motors fails we’ve seen here at Texas Final Drive, allow us to present a very badly scarred radial piston hydraulic motor. This final drive was totaled -- there is just no coming back from this kind of damage.
Here are a few other blog posts you might enjoy!
In this Shop Talk Blog post, we are going to look at one of the most damaged final drive motors we have seen -- and we have seen plenty here at Texas Final Drive. The majority of the damage can be traced back to the rotator group.
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