Shop Talk Blog

The Official Blog for Texas Final Drive

Bobcat RogueX Concept Machine

The Bobcat RougeX is a new autonomous or remote-control concept machine that will eventually serve as a fully electric track-loader platform.

Here are a few other Shop Talk Blog posts you might find interesting:

Dr Mac’s Notebook: Basic Metal Failure

by Dr McCaslin | Mar 26, 2023 |

Final Drive Failure


Failure in a final drive motor is always bad -- but a good understanding of basic metal failure can help understand what causes it and lead to a better understanding of metal behavior in general.

In this Shop Talk blog post, you'll learn about basic metal failure and the material properties that explain it. This includes an introduction to tensile testing, a discussion of key metal parameters, and an example of how these parameters can vary.

Here are two other blogs in this series:

Dr Mac's Notebook: Basics of Mechanical Stress

Dr Mac’s Notebook: Displacement Under a Load

Final Drive Motors: Speed, Torque, and Power

by Dr McCaslin | Feb 13, 2023 |

Troubleshooting, Torque, Speed, Power

1 Comment

One of the most important relationships for final drive motors ties together power, torque, and speed -- and understanding this relationship can help you troubleshoot your final drive motor.


Here are a few other blog posts you might find helpful:

How Many Ways Can an Oil Seal Fail

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.

Dr Mac’s Notebook: Displacement Under a Load

by Dr McCaslin | Jan 11, 2023 |

Final Drive Failure


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.


Here are some other Shop Talk Blog posts you might be interested in:

Static and Dynamic Bend Radius: What You Need to Know

by Jim Strong | Jan 02, 2023 |

Hydraulic Lines


The minimum bend radius is important in hydraulic layout, but what is the difference between static and dynamic bend radius?

Hydraulic Hose Failure: Signs to Look For

by Jim Strong | Dec 18, 2022 |

Hydraulic Lines, hydraulic hoses

1 Comment

Of course, there are obvious signs of hose failure: fluid spewing from a crack, a hose split wide open, or a hose blown off a connector. However, there are several signs you can look for that tell you failure is imminent -- and that’s the blog post's topic.

You’re in the field working on a job with a tight deadline when the lifting arm on your skid steer or boom on your compact excavator suddenly loses power. You step out of the machine and see the cause: a leaking hydraulic hose. While you may not know what’s happening inside a hydraulic hose, some signs on the outside can serve as a red flag to replace (and maybe reroute) that hose. Here's a discussion on what to look for during your daily equipment walkaround.

The Final Drive Repair Shop House of Mechanical Horrors

Here are some final drive motor horrors from our own shop -- with some explanations of what caused them and how you can prevent them.


And while you're here, check out these terrifying Shop Talk Blog posts from the past ...

Case Drain Filter: Good or Bad?

by Jim Strong | Oct 09, 2022 |

Filters, Case Drain Filters, Contamination, Case Drain


Why don't we see case drain filters on all compact hydraulic equipment? There are pros and cons to including them in the hydraulic design. If your machine requires one, then it is critical that you replace it regularly.


Here are some other Shop Talk Blog posts you may find useful:

Dr Mac's Notebook: Basics of Mechanical Stress

by Dr McCaslin | Sep 19, 2022 |

Final Drive Failure

1 Comment

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. 

Here are some other Shop Talk Blog posts you might find of interest:

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

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