Shop Talk Blog

Most owners and operators don’t realize how important case drain flow is when evaluating and diagnosing a final drive motor. This test can tell you a great deal about what’s going on inside your final drive without having to open it up.

In this blog post, we take a look at case drain flow testing, including how to perform the test and how to interpret the results.

Internal Leakage

Internal leakage is designed to support lubrication and cooling of dynamic components (e.g., bearings, pistons, etc.). Now, this leakage never leaves the system. It will always be returned to the hydraulic reservoir, often via a low-pressure drain line. Internal leakage does not contribute to the work being done by the final drive motor, though.

There is a baseline case for the hydraulic motor drain flow on your machine. However, as wear increases internal clearances and internal seals wear out, the case drain flow increases. This directly reduces the final drive's volumetric efficiency.

Overheating is one of the earliest warning signs that something inside your final drive is going wrong. Before you hear grinding or experience a total failure, a steady rise in temperature often signals problems that you can catch early if you know what to look for.

In this Shop Talk Blog post, we’ll talk about what is considered too hot, then discuss the five key reasons why final drives overheat. We’ll wrap up with a quick review of what kind of damage overheating can cause and simple checks to address it.

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

• Why Is My Skid Steer Acting Up?
• What Causes a Final Drive to Wear Out Prematurely
• Buying a Replacement Final Drive Motor
  

You probably maintain your tracks, filters, and attachments, but did you know that hydraulic fluid quietly destroys pumps and final drives when it’s neglected? Bad hydraulic fluid won’t fail overnight. Its effects are slow, causing excessive heat, accelerated wear, and power loss, until your equipment comes to a complete stop.

In this Shop Talk Blog post, we're looking at what it costs you to keep running your compact equipment on bad hydraulic fluid ... and the price is more than you budgeted for!

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

• The Case Drain Filter: A Small Component That Prevents Big Trouble
• Why Rental Companies Trust Texas Final Drive
• 5 Warning Signs Your Final Drive Might Be Failing (And What to Do Next)

Just got your new or reman final drive motor and are having a little trouble identifying the ports? This Shop Talk Blog post is for you.

In this blog post, we’ll go over the four different categories of ports you can find on a final drive, what their purpose is, and how to identify them. For larger tonnage motors, we’ve also included a short video we made.

Here are some additional Texas Final Drive blog posts you might find helpful:

• Valve Blocks on Final Drive Hydraulic Motors
• The Ultimate Glossary of Terms About Hydraulic Motors
• What to Know Before You Order a Final Drive
  
  

Have you ever had a skid steer or excavator break down in the middle of a big job?

Hydraulic reliability isn’t just about uptime. It’s actually about keeping your equipment operational to avoid lost income, missed deadlines, and protecting the investment you've made in your equipment. 

In this Shop Talk Blog, we’re going to discuss how reliability is built, not something to take for granted. It starts with good habits, regular checks, and a strong maintenance culture.

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

• The Facts about Large Skid Steer Loaders
• Do You Know These Facts About Timbco and TimberPro?
• Hydraulic Pump Failure

The Cost of Unreliable Hydraulics

A single hydraulic failure can have ripple effects on your compact equipment, including costly downtime, missed deadlines, and expensive repairs. And contamination and improper maintenance are among the top causes of failure for hydraulic equipment. Investing in the reliability of your equipment, on the other hand, pays for itself in fewer breakdowns, longer component life, and the ability to maintain the equipment's value. Let’s take a look at what your investment in reliability looks like.

A Spooky Troubleshooting Guide for When Your Equipment Acts Possessed

Your skid steer can act downright haunted some times, with things like strange noises, phantom movements, and mysterious leaks -- and sometimes, death. The good news is that it isn’t ghosts, but rather an all too real issue with mechanical or hydraulic causes. So here’s a Shop Talk Blog post where we provide practical troubleshooting tips, empowering you to take control of the situation.

The Phantom Creep: When Your Skid Steer Moves on Its Own

Have you ever had your final drive inch forward or backward with no input? No worries: your skid steer isn’t possessed by a spirit. The most likely causes are …

• A sticking control valve
• Contaminated hydraulic fluid
• A faulty joystick

How do you deal with this “spirit”? That’s pretty straightforward: clean or replace the hydraulic filters and bleed the hydraulic lines, and if that doesn’t work, then inspect the control wiring.

When it comes to final drive motors, gear oil is the quiet workhorse that makes everything else possible. It cushions the gears, keeps heat under control, and prevents metal-on-metal destruction. But here’s the catch: when gear oil is neglected or handled the wrong way, it can turn into the very thing that shortens the life of your machine.

One of the most frustrating things about equipment failures is how often they sneak up on you. Your machine might sound fine, run fine, and get the job done—until one day, the final drive gives out without much warning. A common culprit? Gear oil that’s quietly been working against you instead of for you. Gear oil is supposed to lubricate, protect, and keep things cool inside the drive. But once it’s contaminated, it stops doing its job, and the damage starts piling up long before you notice anything’s wrong.

In this Shop Talk Blog post, we talk about gear oil contamination, signs to look for, prevention and maintenance tips, and what to do when the damage is done.

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

• Final Drive Motors: Frequently Asked Questions 
• Too Hot to Handle: How Summer Heat Wears You Down on the Job Site 
• Reman Final Drive Motors: Affordable, American-Made, and Eco-Friendly 

You’re on the job, deadlines are already tight, and suddenly your skid steer doesn’t sound or feel right. Every hour of downtime costs not just time but money. 

That’s why we’ve put together this Shop Talk Blog post to help you learn the early warning signs of a final drive that’s about to fail. That way, you can catch these problems before they become catastrophic-- and more expensive.

Loss of Power

If your machine suddenly feels weak, maybe struggling to climb like it used to, or is sluggish when it has to move with a load, then here are some possibilities as to what is wrong with it:

• A blocked case drain filter
• Internal wear in the final drive
• Weak charge pump
• Final drive brakes are not releasing
• Other hydraulic issues

If power loss is only on one side, or the machine tries to curve to the side, that’s a big clue it’s a final drive issue.

In the world of compact equipment, even the most seemingly minor component can make or break your machine’s performance. One such part, frequently overlooked but absolutely essential, is the case drain filter. It is a low-profile workhorse hidden in your hydraulic system, and when neglected, it can lead to catastrophic damage to your final drive motor.

At Texas Final Drive, we’ve seen the aftermath of ignored or clogged case drain filters: cracked housings, shredded rotator groups, and thousands of dollars in repairs. Here’s what every equipment owner and operator needs to know about this vital component.

Here are a few Shop Talk blog posts you might be interested in:

• Identifying the Hydraulic Ports on a Final Drive Motor
• Bobcat Final Drive Failures and Case Drain Filters
• Preventing Case Drain Related Failure on Final Drive Motors