Frequently Asked Questions

There are always questions that come up frequently when sourcing replacement parts for construction machinery.

Below are the questions that our support team at Astrak are most often asked about construction machinery undercarriage and wear parts.

We have tried to cover everything from rubber tracks and idlers through to delivery and warranties. If you have a specific question regarding a project you are working on then please contact a member of our expert team.

General Questions

Where is Astrak based?

Astrak’s is located in Austin, Texas.

Where can I find the model & serial number for my machine?

The location of the model and serial number plate can vary from machine to machine. Please consult your manufacturers manual for more details.

Do you support older or obsolete tracked machinery?

Yes we do stock a limited range of parts for older machines. Please contact our team for more information on 0330 555 2000 or email

Do you provide a undercarriage fitting and repair service?

Yes. We provide a fitting and repair service both in our workshop and onsite.

Rubber Tracks

What differences are there between Terratrack and Terratrack Plus?

Terratrack is our standard rubber track offering and TerraTrack Plus is a premium product with anti-vibration and anti-detracking technology.

How do I measure or identify what sort of rubber track my machine needs?

Just give us the make and model of you machine and we will do the rest.

How can I prevent rubber tracks from detracking?

The most important factor in preventing detracking is to ensure that the track tension is correct at all times and the undercarriage is kept clean.  You can of course solve the problem by buying TerraTrack Plus.

Can I easily convert my excavator from steel to rubber tracks?

This is possible but it depends on the make and model of your machine. Call our expert team of advisors to find out more.

When should I replace my rubber tracks?

Like any other component of heavy machinery, rubber tracks require regular maintenance and occasional replacement.  Knowing when and how to replace your rubber tracks can help keep your machine running efficiently and safely.

Please refer to this knowledge base post for guidance –


Rubber Pads

What is the average lifespan of a rubber pad?

It is purely down to application. Used correctly on a paved surface our rubber pads will last a long time, up to 36 months. However used in the wrong environment you could badly damage set of rubber pads in a matter of weeks.

I need some clip on pads, do I put them on every shoe or every other?

Rubber pads are designed to be fitted to every shoe on the machine. If you do want to use only a half set the ride will be very bumpy when tracking and we cannot offer any warranty unless a full set is purchased and fitted.

Identifying Worn Components

How can I identify a worn idler?

Most commonly the bearings would have collapsed and the idler will be making a loud metal on metal noise.

How can I identify a worn roller?

Most commonly the bearings would have collapsed and the roller will be making a loud metal on metal noise.

How can I identify a worn sprocket?

The teeth should be sharp, pointed and uniform in shape around the circumfernce of the sprocket .

Undercarriage Parts

What grease should I use with your track adjusters?

Any kind of general purpose lithium grease is suitable for use with our track adjusters.

What’s a grouser and how do I measure it?

A grouser is the tread part of a steel track shoe. The height of the grouser should be measured using a depth gauge from the top of the grouser to the upper side of the base of the shoe.


Please follow this handy step by step guide.

Should I replace all of my rollers at the same time?

In an ideal world yes; this ensures even wear across all new rollers. If a customer does not want to order a full set, the next best option would be a half set. In this case all the new rollers should be fitted on one side of the machine and the best of the worn rollers on the other side.

Is a track adjuster included with an idler?

No. At Astrak when we refer to an idler, we a talking about the wheel, shaft, bearings and side arms only.

Do I need new bolts with my track shoes/sprockets/rollers/idlers?

We recommend that you always replace track bolts and nuts and undercarriage hardware when you the related parts. When a bolt is loosened it takes on average 50% more torque than it was originally tightened to therefore will weaken the bolt.

How should I bend the retaining pin on easy fit pins?

The retaining pin should be bent around using a small hammer or similar. Do not use a form of heat to bend the retaining pin as this will weaken the pin.

Contact Us

We are looking forward to working with you to maximise machinery uptime.

If you have an inquiry or request a quote for our undercarriage and wear parts, use the contact form shown here.
+1 (281) 805 4535

Business Hours

We are open Monday to Friday
from 7.30 am to 5.30 pm