Caterpillar Parts


We know how important it is to get the part you need, when you need it. That’s why at Altorfer Cat, we stock virtually every part possible for our equipment. In the rare case that we don’t have it on hand, we almost always get it to you by the next day. Altorfer offers the best selection of new and used Cat® heavy equipment parts in Iowa, northeast Missouri, central and northern Illinois, Chicago, and northwestern Indiana, as well as remanufactured parts and even non-Cat parts for your Allied machines. And with numerous ordering options, including our convenient online Cat PartStore, getting the part you need when you need it has never been easier.

We also have designated parts drop locations throughout our service areas. So the parts you need are no more than 24 hours and a short drive away.

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There’s no better way to ensure your machines will always deliver more than with new Cat heavy equipment parts. We have access to more than 800,000 genuine Cat undercarriage and other critical parts and components for all types of machines. All new Cat parts feature a six-month warranty that allows you to purchase with confidence. Some of the most popular are forklift parts, dozer parts, excavator parts and skid steer parts.

For economy-minded business owners looking to make every penny count, we also offer an extensive inventory of used parts through our GreatLakes Equipment division. Choose from more than 50,000 quality used parts that are in stock and ready to ship to your location. We handle only genuine OEM parts to ensure maximum value and durability.


Shop for the parts you need anywhere, anytime, and on any device. Avoid extra trips to the parts counter and costly downtime by shopping on Create your account and start shopping today by visiting

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Remanufactured heavy equipment parts are an excellent choice for any business looking for like-new quality at a fraction of the cost. We offer an exchange service in which you can trade your old part for a completely refurbished one. This not only results in significant cost savings, it’s also an environmentally friendly solution that lessens the demand for raw materials needed to produce brand-new parts. In addition, Cat remanufactured parts offer the same comprehensive warranty as new parts for your protection.


Many companies choose Cat products for their heavy equipment needs because they are durable machines built to deliver a lifetime of value. The best way to get the most out of an older machine is by using Cat Classic parts. These heavy equipment parts are specifically designed for older Cat machines and offer a sensible, low-cost repair alternative. Because these are genuine Cat parts, you know that they’re high-quality, durable parts you can count on.


At Altorfer, we make every effort to provide a total heavy equipment solution. In addition to our unbeatable selection of Cat parts, we also offer a wide assortment of heavy equipment parts from Allied manufacturers through GreatLakes Equipment.

A perfect example is our selection of Nexus, Berco and DCF undercarriages for many different types of machines. You’ll also find an extensive inventory of tires, hydraulic components, filters and more. And if we don’t have the part you need in our 300,000-square-foot distribution facility, we’ll find it for you.

With so many parts to choose from, it’s no wonder that Altorfer is the heavy equipment parts leader in Chicago!

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