939 Crawler Loader

CAT 939 Crawler Loader Undercarriage Parts

We are the your one-stop-shop for undercarriage parts and complete undercarriages for the Cat 939 series crawler loader. Our undercarriage parts come backed by an industry leading THREE YEAR / 4000 HOUR WARRANTY. In addition to supplying new undercarriage parts for your Caterpillar 939, we also provide refurbished, used, and aftermarket part options, which may qualify for same-day shipping. Please contact us for more information.

The Cat 939 Family includes

939 & 939C

Caterpillar 939 Crawler Loader

The Caterpillar 939 was introduced in 1994 and was manufactured in Japan until 1997, when it was replaced by the Cat 939C Hystat Track-Type Loader. The Hystat system is a dual-path, closed-loop hydrostatic power train provides full powerturn capability, stepless speed range, dynamic braking and smooth modulation for steering and directional shifts. The 939C offered a single joystick to control speed, direction and steering, effortlessly. With a powerful six-cylinder Cat® 3046 turbocharged engine and the new hydrostatic powertrain, the 939C crawler loader gives you the productivity you need to stay competitive. With soil conditions changing with each job you tackle, you need an undercarriage built rugged for long wear life and low owning and operating costs. That’s why all 939C models are built with sealed and lubricated track (SALT). Sealed-in lubricant permanently coats the track pin, minimizing metal-to-metal contact and virtually eliminating internal pin and bushing wear. Undercarriages have thicker recoil guarding for added impact resistance. New bolt-on, rear track guiding guards, further enhance rear guiding and provide extra protection against abrasive wear. If maintained with our quality undercarriage parts, these Cat 939 series can last a lifetime. 

    Cat Undercarriage Request

    Track AssemblyTrack PadsRollersSprocketsIdlersComplete Undercarriage

    CAT 939 Undercarriage

    excavator sprockets

    Cat 939 Sprockets

    Our sprockets and segment groups are specifically designed to provide extended life and durability for the toughest working conditions. We offer sprockets for crawlers, dozers and excavators.

    undercarriage rollers

    Cat 939 Rollers

    PIVOT supplies the construction and mining industry with top carrier rollers along with single and double flange bottom track rollers. Our rollers are manufactured to provide excellent service in extreme operating conditions.

    undercarriage idlers

    Cat 939 Idlers

    We also carry a wide range of idlers that are fabricated and cast from high strength steel. This is to maintain the integrity of our product and reliability for your machine.

    excavator undercarriage

    Cat 939 Track Assembly

    PIVOT offers track group assemblies as well as individual track chains. Our track chains come either greased or sealed and lubricated in Standard or Heavy Duty options. All track groups can be assembled prior to shipment for your convenience and ease of install.

    undercarriage track pads

    Cat 939 Track Pads

    We supply a variety of arrangements when it comes to your machine’s track shoes that have been designed and tested for your specific application. All of our track pads come either with a single, double or triple grouser setup. You also have the option of with or without mud-holes, standard or extreme service, along with various widths.

    track adjuster

    Cat 939 Track Adjusters

    PIVOT also carries several options for complete track adjuster assemblies, springs and seal kits. Our track adjusters are direct replacement for fit, form and function and have been specifically engineered to operate under extreme working conditions to keep you moving.