From air conditioning to filters, Altorfer Truck Centers has the parts you need to get the job done. Cat® parts are manufactured to precise specifications and are built for:

  • Durability
  • Reliability
  • Productivity
  • Less environmental impact
  • Reuse
  • Multiple lives

Plus, Altorfer Cat offers 24/7 online parts ordering, unmatched parts availability and timely delivery so you can keep your truck up and running.



Air Filters, Oil Filters, Fuel Filters & Hydraulic Filters

The best way to reduce owning and operating costs is to maintain system cleanliness. When you use a Cat Filter, designed specifically for Cat Engines and component systems, you can provide the highest level of cleanliness and performance to your equipment. Click here to buy Cat Filters.

Cat Filter Benefits:

  • Reduced wear
  • Maximized component life
  • Consistent quality
  • Reliable protection
  • Long life


Lowers Maintenance Costs

Another way to lower the maintenance cost on your equipment is to use Cat Coolants. Cat Coolants are formulated to protect against boiling and freezing temperatures. Plus, the Cat ELC (Extended Life Coolant) works more than three times longer than other coolants and delivers superior component protection. Click here to buy Cat Coolants.

Cat Coolants Benefits:

  • High boiling temperature
  • Freeze protection
  • Superior corrosion protection
  • Non-foaming
  • Scale and deposit prevention
  • Organic Base Chemistry
  • Lower cost, 40-50% less than conventional


Cat Premium High Output (PHO) Batteries

Why buy any old battery when you can purchase a Cat battery that has been specially designed to meet the demanding environments that your Cat products work in? Cat batteries are standard equipment in all Cat products and are clearly differentiated from the competition. Click here to buy Cat Batteries.

Cat Battery Benefits:

  • Highest cold cranking amps (CCA) in the industry
  • Longest amp-hour capacities
  • 100-hour vibration test (5-times the industry standard)
  • Best deep discharge re-charge cycle
  • SAE J2185 life cycle
  • Available in Maintenance Free and Low Maintenance designs

Cat PHO batteries are available worldwide in popular Battery Council International (BCI) group sizes for both Cat equipment and other manufacturers. There are even select BCI group size batteries available for automotive, marine, recreational, on-highway truck and bus applications.


Diesel Engine Oil, Hydraulic Oil, Transmission Oil, and Drivetrain Oil

Did you know that each type of Cat Oil undergoes an extensive testing process called the Cat S.O.S. Services Oil Analysis Program? This testing allows us to demonstrate how Cat Oil can deliver extended drain intervals, maximize component life by resisting oxidation, prevent buildup and maintain proper viscosity. Altorfer Cat also offers this testing on-site for your own fluid analysis reports.

Cat Oil Benefits:

  • Consistent high-performance oils formulated for the needs of Cat machines and engines
  • Superior wear protection
  • A complete line of oils for every application and environment


Good for business, good for customers and good for the environment

Don’t forget about the impressive Remanufacturing options the Altorfer Cat Parts & Service Department offers. Remanufacturing is the process of returning a product at the end of its life to same as “new” condition in a manufacturing environment. It operates as a one-for-one exchange, where end-of-life products are returned for a remanufactured product — reducing waste and minimizing the need for raw materials to produce a brand new item. Cat Reman offers you a sustainable business model and high-quality, lower cost product support option.

Cat Remanufacturing offers:

  • Off-the-shelf availability
  • Same as new warranty and quality
  • Fraction of new price
  • Lower owning and operating costs
  • Worldwide availability

For more information on our parts please contact or visit your local Altorfer Cat Chicagoland or Indiana dealer.

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

Download our Parts.Cat.Com Brochure.


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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