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Ordering Online - PartStore

As part of a recent change to Partstore it may be necessary to upgrade the graphics capabilities on your computer. If you have been experiencing issues viewing graphics follow the prompts when logging into SIS by selecting ADD ON (which will be located at the top of the screen), then download ISO Viewer. If you are in need of further assistance please feel free to contact Milton CAT’s Service Solutions Center at 508-482-5700 or

Click here to log in to your account.
Click here to sign up for an account.
To view a training schedule,
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Busy contractors and equipment owners concerned about uptime and looking to improve their operational efficiency have a great tool in their hands – PartStore. A reliable, secure and convenient electronic channel for part ordering, PartStore is available to Milton CAT account customers. PartStore is the proven time-saving solution for today’s competitive environment! Some of the main advantages of PartStore are...

Convenience. PartStore is open 24/7, 365 days of the year.

Time saving. Eliminate waiting, focus your efforts, streamline the process of parts ordering and record keeping.

Instant information. Real-time price and availability allow you to make the best purchasing decisions, even after business hours.

Options. Alternate parts options are available through PartStore. Remanufactured, CAT Classic™ Parts, and Used alternative are automatically displayed and available for purchase.

Tracking. Online order history, invoice review, and remanufactured core status help you keep accurate records. Email order acknowledgments confirm your order and help you stay informed.

Not sure of a part number? No problem. You can search for parts using:

Service Information System (SIS) - Caterpillar® parts books containing over 800,000 serial number-specific CAT parts.

General Parts Information (GPI) Catalog - Non serial number-specific parts catalog containing general maintenance parts and tools and supplies.

To get answers to Frequently Asked Questions, click here.

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If you have questions, or have any problems, email us at