From inside (document excerpt):
Sno-Thro Parts Manual Models 938015 – 322 938017 – 522 938018 – 722 938019 – 522 938300 – 522 ® 03812100F 12/03 Supersedes 03812100,A-E Printed in USA THE MANUAL Before you operate your unit, carefully and completely read manuals supplied with the unit. The contents will provide you with an understanding of safety instructions and controls during normal operation and maintenance. For your safety and the safety of others always read, understand, and follow all DANGER, WARNING, and CAUTION messages found in manuals and on safety decals.
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Hardware descriptions are given in decimals. PRODUCT REGISTRATION The Gravely dealer must register the product at the time of purchase. Registering the product will help the company process warranty claims or contact you with the latest service information. All claims meeting requirements during the limited warranty period will be honored, whether or not the product registration card is returned. Keep a proof of purchase if you do not register your unit. Customer Note: If Dealer does not register your product, please fill out, sign and return the product registration card to Gravely. Decimals to Fractions .063 .125 .188 .250 .313 .375 .438 .500 1/16 1/8 3/16 1/4 5/16 3/8 7/16 1/2 .563 .625 .688 .750 .813 .875 .938 1.00 9/16 5/8 11/16 3/4 13/16 7/8 15/16 1 Questions? Please follow these helpful steps: 1. Refer to the manuals supplied with your unit. They will guide you through safe and proper operation and maintenance. They contain specifications on your unit. If your questions are not answered in these manuals, go to step number two. 2. Contact Your Dealer. Our dealers will be happy to supply any service or advice required to keep your unit operating at peak efficiency. A factory trained staff is available to support your equipment needs. They stock genuine Ariens parts and lubricants manufactured with the same precision and skill as the original. If your questions are not resolved by the support staff, ask for the manager or owner.
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Publisher: www.ariens.com