{"product_id":"deck-belt-m174994","title":"M174994 Deck Belt for John Deere X330 X350 X354 X370 42-Inch Deck","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\n\u003cp\u003eThis aftermarket \u003cstrong\u003eM174994 mower deck belt\u003c\/strong\u003e fits select John Deere X330, X350, X354, and X370 lawn tractors equipped with compatible 42-inch mower decks.\u003c\/p\u003e\n\n\u003cp\u003eThe supplier lists this aramid replacement belt at approximately \u003cstrong\u003e1\/2 inch wide by 144.8 inches long\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eUse this listing when your original mower-deck belt number is \u003cstrong\u003eM174994\u003c\/strong\u003e and the installed deck uses the same belt dimensions, pulley routing, and tension-system configuration.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Match the original belt number and installed mower deck before ordering. Do not select this belt using the tractor model or 42-inch deck width alone.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eAftermarket mower-deck drive belt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplacement Number:\u003c\/strong\u003e M174994\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupplier Reference:\u003c\/strong\u003e AB632-AA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupplier-Listed Width:\u003c\/strong\u003e Approximately 1\/2 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupplier-Listed Length:\u003c\/strong\u003e Approximately 144.8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBelt Material:\u003c\/strong\u003e Aramid\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Gray\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity Included:\u003c\/strong\u003e One belt\u003c\/li\u003e\n\u003cli\u003eDesigned for select John Deere 42-inch mower-deck applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eReplaces These Belt Numbers\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eM174994\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSupplier Reference Number\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eAB632-AA\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSearch-Friendly Number Formats\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003eM174994\u003c\/li\u003e\n\u003cli\u003e174994\u003c\/li\u003e\n\u003cli\u003eAB632-AA\u003c\/li\u003e\n\u003cli\u003eAB632AA\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eBelt Specifications\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComponent:\u003c\/strong\u003e Mower-deck drive belt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupplier-Listed Width:\u003c\/strong\u003e Approximately 1\/2 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupplier-Listed Length:\u003c\/strong\u003e Approximately 144.8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Aramid\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Gray\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e One belt\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eBelt measurements can vary slightly depending on how the belt is positioned or measured. Use the original \u003cstrong\u003eM174994\u003c\/strong\u003e part number as the primary fitment check.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eCompatible John Deere Models\u003c\/h2\u003e\n\n\u003cp\u003eThe supplier lists this M174994 belt for select 42-inch mower-deck configurations on the following John Deere lawn tractors:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eJohn Deere X330\u003c\/li\u003e\n\u003cli\u003eJohn Deere X350\u003c\/li\u003e\n\u003cli\u003eJohn Deere X354\u003c\/li\u003e\n\u003cli\u003eJohn Deere X370\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFitment note:\u003c\/strong\u003e These are supplier-provided model examples. Confirm that the original mower-deck belt is marked M174994 and that the installed deck uses the same routing and tension configuration.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eJohn Deere X330 Fitment Note\u003c\/h2\u003e\n\n\u003cp\u003eThe supplier lists the M174994 belt for select John Deere X330 tractors with compatible 42-inch mower decks.\u003c\/p\u003e\n\n\u003cp\u003eThe X330 can be equipped with more than one mower-deck configuration. Confirm the original M174994 belt number before ordering.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eJohn Deere X350 Fitment Note\u003c\/h2\u003e\n\n\u003cp\u003eThe supplier lists the M174994 belt for select John Deere X350 tractors equipped with compatible 42-inch mower decks.\u003c\/p\u003e\n\n\u003cp\u003eDo not order this belt for an X350 using the tractor model alone. Match the original belt number and mower-deck routing.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eJohn Deere X354 Fitment Note\u003c\/h2\u003e\n\n\u003cp\u003eThe supplier lists the M174994 belt for select John Deere X354 tractors with compatible 42-inch mower decks.\u003c\/p\u003e\n\n\u003cp\u003eConfirm the original belt number, deck configuration, idler layout, and pulley routing before installation.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eJohn Deere X370 Fitment Note\u003c\/h2\u003e\n\n\u003cp\u003eThe supplier lists the M174994 belt for select John Deere X370 tractors equipped with compatible 42-inch mower decks.\u003c\/p\u003e\n\n\u003cp\u003eThe X370 may be used with different mower attachments or deck configurations. Confirm that the required mower-deck belt is M174994.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eMower Deck Belt Position\u003c\/h2\u003e\n\n\u003cp\u003eThe M174994 is used in the mower-deck drive system. It transfers power through the deck pulley system to operate the mower blades.\u003c\/p\u003e\n\n\u003cp\u003eThis belt should not be confused with:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eThe tractor traction-drive belt that moves the mower\u003c\/li\u003e\n\u003cli\u003eA snowblower or other attachment belt\u003c\/li\u003e\n\u003cli\u003eA belt used on a different mower-deck size\u003c\/li\u003e\n\u003cli\u003eA primary or secondary belt from a separate two-belt deck system\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eTrace the original belt routing before removal and confirm the M174994 number before ordering.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\n\n\u003cp\u003eConfirm all of the following before ordering:\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003eThe original mower-deck belt number is \u003cstrong\u003eM174994\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eThe mower is a compatible John Deere X330, X350, X354, or X370.\u003c\/li\u003e\n\u003cli\u003eThe installed mower deck is a compatible 42-inch configuration.\u003c\/li\u003e\n\u003cli\u003eThe supplier-listed size of approximately 1\/2 inch by 144.8 inches matches the required belt path.\u003c\/li\u003e\n\u003cli\u003eThe replacement is for the mower-deck drive system.\u003c\/li\u003e\n\u003cli\u003eThe belt is not being confused with the tractor traction-drive belt.\u003c\/li\u003e\n\u003cli\u003eThe spindle pulleys, idler pulleys, tension arm, spring, and belt guides match the original configuration.\u003c\/li\u003e\n\u003cli\u003eThe original belt routing has been photographed or recorded before removal.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eDo not install the replacement until the part number, deck configuration, dimensions, and routing have been confirmed.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eCommon Symptoms of a Worn Deck Belt\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003eMower blades turn slowly under cutting load\u003c\/li\u003e\n\u003cli\u003eBelt squeals when the PTO clutch engages\u003c\/li\u003e\n\u003cli\u003eBelt repeatedly jumps off a spindle or idler pulley\u003c\/li\u003e\n\u003cli\u003eVisible cracking, fraying, glazing, or burned belt surfaces\u003c\/li\u003e\n\u003cli\u003eLoose belt tension with the tension system engaged\u003c\/li\u003e\n\u003cli\u003eReduced grass-discharge or bagging performance\u003c\/li\u003e\n\u003cli\u003eBurning-rubber smell near the mower deck\u003c\/li\u003e\n\u003cli\u003ePTO clutch engages but the mower blades do not turn\u003c\/li\u003e\n\u003cli\u003eUneven blade speed or inconsistent cutting performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003ePark the mower on a level surface and remove the ignition key.\u003c\/li\u003e\n\u003cli\u003eDisconnect the spark-plug leads before working near the mower deck.\u003c\/li\u003e\n\u003cli\u003ePhotograph or sketch the original belt routing before removal.\u003c\/li\u003e\n\u003cli\u003eInspect all spindle and idler pulleys for bearing wear or damage.\u003c\/li\u003e\n\u003cli\u003eInspect the tension arm, tension spring, and belt guides.\u003c\/li\u003e\n\u003cli\u003eReplace seized pulleys or damaged tension components before installing the new belt.\u003c\/li\u003e\n\u003cli\u003eConfirm the belt is seated completely inside each pulley groove.\u003c\/li\u003e\n\u003cli\u003eCheck that the flat and V-shaped sides of the belt contact the correct pulleys.\u003c\/li\u003e\n\u003cli\u003eRotate the mower-deck pulley system manually before starting the engine.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eQuick Ship Fulfillment\u003c\/h2\u003e\n\n\u003cp\u003eThis item may ship directly from one of our trusted U.S. distribution partners to help reduce transit time. Packaging, labeling, or warehouse origin may vary, but the part will match the replacement number, fitment notes, and supplier specifications shown in this listing.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eWhy Buy From PTO Direct USA\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003ePart-number-first listings to help reduce fitment mistakes\u003c\/li\u003e\n\u003cli\u003eFocused mower-deck and PTO replacement parts\u003c\/li\u003e\n\u003cli\u003eClear replacement numbers and model-fitment notes\u003c\/li\u003e\n\u003cli\u003ePractical support when you need help checking compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\n\u003ch3\u003eWhat does the M174994 belt fit?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplier lists M174994 for select John Deere X330, X350, X354, and X370 tractors equipped with compatible 42-inch mower decks.\u003c\/p\u003e\n\n\u003ch3\u003eHow long is the supplier-listed M174994 belt?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplier lists the belt at approximately \u003cstrong\u003e144.8 inches long\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eHow wide is the supplier-listed M174994 belt?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplier lists the belt at approximately \u003cstrong\u003e1\/2 inch wide\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eWhat material is the M174994 belt made from?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplier describes this replacement as an \u003cstrong\u003earamid mower-deck belt\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eHow many belts are included?\u003c\/h3\u003e\n\n\u003cp\u003eThis listing includes \u003cstrong\u003eone M174994 deck belt\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eDoes M174994 fit the John Deere X330?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplier lists the belt for select X330 tractors with compatible 42-inch mower decks. Confirm the original M174994 number before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eDoes M174994 fit the John Deere X350?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplier lists select X350 42-inch mower-deck applications. Match the original belt number and deck routing.\u003c\/p\u003e\n\n\u003ch3\u003eDoes M174994 fit the John Deere X354?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplier lists select X354 tractors with compatible 42-inch mower decks. Confirm the original M174994 number.\u003c\/p\u003e\n\n\u003ch3\u003eDoes M174994 fit the John Deere X370?\u003c\/h3\u003e\n\n\u003cp\u003eThe supplier lists select X370 tractors with compatible 42-inch mower decks. Match the installed deck and original belt number.\u003c\/p\u003e\n\n\u003ch3\u003eDoes M174994 fit every 42-inch John Deere deck?\u003c\/h3\u003e\n\n\u003cp\u003eNo. John Deere produced many different 42-inch mower-deck configurations. Match the original belt number, deck layout, dimensions, and pulley routing.\u003c\/p\u003e\n\n\u003ch3\u003eIs this the tractor traction-drive belt?\u003c\/h3\u003e\n\n\u003cp\u003eNo. This listing is for a mower-deck drive belt. The traction-drive belt that moves the tractor is a separate part.\u003c\/p\u003e\n\n\u003ch3\u003eCan I order this belt using only the tractor model?\u003c\/h3\u003e\n\n\u003cp\u003eNo. Confirm the original M174994 number, installed mower deck, dimensions, and belt routing before ordering.\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch2\u003eRelated John Deere Parts and Guides\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/spindle-assembly-am144608\"\u003eAM144608 Spindle Assembly\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/john-deere-quick-reference\/john-deere-x330\"\u003eJohn Deere X330 Quick Reference\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr\u003e\n\n\u003cp\u003e\u003cstrong\u003eNeed a different belt?\u003c\/strong\u003e Browse the full \u003ca href=\"\/collections\/belts\"\u003emower deck belts collection\u003c\/a\u003e.\u003c\/p\u003e","brand":"PTO Direct USA","offers":[{"title":"Default Title","offer_id":53200843440495,"sku":"CAL-296772731992","price":34.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0957\/5058\/6735\/files\/m174994-belt.jpg?v=1783917817","url":"https:\/\/ptodirectusa.com\/products\/deck-belt-m174994","provider":"PTO Direct USA","version":"1.0","type":"link"}