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5 Simple Keys to Effective Excavator Undercarriage Maintenance

 Heavy Equipment Undercarriage Costs?

The undercarriage of your heavy equipment can account for up to 50% of your O&O costs over the lifetime of your machine,  whether its a compact track loader, multi-terrain loader, or excavator.  That means keeping the undercarriage well-maintained is very important, so in this blog post we are going to discuss five simple keys to effective undercarriage maintenance.


Review: What Is the Undercarriage

If you are reading this, you probably already know what the undercarriage is -- but a little review can’t hurt. gives an excellent definition in terms of a track loader, but it applies to any kind of tracked machinery:

“... the undercarriage is a highly specialized system of moving parts and machinery that must be maintained to ensure a track loader has traction.”

The undercarriage includes the tracks, chains, track links, pins, idlers, rollers, track pads, bogie wheels, and sprockets. It must interact with the hydraulic system of the loader, including the final drive hydraulic motors.  These facts apply whether its a New Holland CTL or a Caterpillar MTL.

Key #1: Inspecting the Undercarriage

The first key to maintaining your undercarriage is a daily inspection, which allows you to recognize problems before they get out of hand. Before starting a shift, always take the time to perform a visual inspection of the undercarriage. You are checking for loose hardware, leaky seals, dry joints, or abnormal wear patterns. This should be easy to do if the machine was cleaned off the day before. Note that some experts recommend a complete undercarriage inspection every 1,000 to 2,000 hours.

Key #2: Cleaning the Undercarriage

final-drive-tracked-tracks-travel-motor-track-motor-idlers-chain-tension.pngThe next key maintenance activity involves cleaning the undercarriage. Cleaning out the undercarriage and tracks at the end of the day is not the most pleasant job, granted, but it directly contributes to the useful life of your machine and its components (including your final drive or travel motor).  Taking the time to clean out the undercarriage serves three major purposes:

  1. It prevents debris from either freezing or drying/hardening on the tracks and undercarriage components,
  2. Makes the visual inspection of the machine a good deal more productive,
  3. And minimizes fuel usage because a significant build-up of debris like dried mud, rocks, gravel, and other debris can increase the weight of the machine.

Remember that frozen or hardened debris will not only increase the wear on your machine but can get packed in tightly around the final drive  and lead to damage of it's the main seals, which in turn can lead to very expensive repairs or even replacement.

Don't forget hat if you are having a hard time getting this kind of debris out of your undercarriage you can use a a hose or, better yet, a pressure washer at regular intervals during the day.

Key #3: Checking Track Tension

Another aspect of maintaining your undercarriage involves track tension. Incorrect track tension will increase stress in key components while speeding up the rate of wear. Most experts agree that track tension should be checked every 10 to 15 hours of machine use, however don’t forget that before you check and adjust the tension  you should run the machine about 30 minutes to give it a chance to acclimate to the working conditions.

If the track tension is too tight, it will cause unnecessary stress on the undercarriage and drive components while wasting horsepower and, in turn, fuel. If the track tension is too loose, the bushings and sprockets are going to experience excessive wear.

A good rule of thumb is this: track tension should be slackened when working in muddy environments and tightened for harder ground (and rock) conditions.


Key #4: Using the Appropriate Shoe Width

The width of shoes for your tracks has more of an impact on the life your undercarriage than you may think.  Shoes that are too narrow will cause the machine to sink into the ground and allow debris to get tightly packed on the roller frame, which in turn increases wear and makes it much harder to clean. On the other hand, if the shoes are too wide then they may bend or crack, as well as wear out more quickly. In addition, wide shoes don’t work well on hard ground or around rocks.

When it comes to track shoe width, experts advise you to use the narrowest shoe width that still provides the function and level of flotation that you need for the job.

excavator-tracked-sunset.pngKey #5: Guidelines for Minimizing Undercarriage Wear

Here are some guidelines for operators that will help minimize unnecessary (and expensive) wear on the undercarriage:

  • Avoid, as much as is feasible, track spinning, same direction turning, and counter-rotation when working on large jobs
  • Do not run the machine at high speeds if not necessary
  • Do not run the machine in reverse if not necessary
  • Avoid quick, aggressive turns, instead opting for wider turns
  • To minimize wear when going uphill, keep the final drive motor at the back end
  • Remember to dig over the idler and not over the sprocket and final drive
  • Use ramps or boards when driving over very steep angles
  • When working on slopes, alternate the work direction

Recommendation Applies to All Excavator Brands

The undercarriage represents a significant part of your machine investment, and taking good care of the undercarriage will benefit other key components, from the tracks to the final drive motors or track motors.  Consider your undercarriage maintenance to be part of your final drive maintenance.  The advice given in this article applies regardless of brand -- CAT, Bobcat, Terex, Case, New Holland, etc.  Taking the time to perform regular inspections and maintenance, along with smart operator techniques, can quite literally save you thousands in repair costs.


Recommended best-in-class remanufactured final drive motors come from Texas Final Drive.  Continuous inventory updates provides hard to find motors for time-sensitive demand.  Check out the New Holland Compact Track Loader Hydraulic Motors inventory.

New Holland Compact Track Loader Hydraulic Motors CTA 001



Topics: Final Drive Motor Maintenance, Heavy Equipment 101, Mini-excavators

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