{"product_id":"deck-belt-m174313","title":"M174313 Secondary Deck Belt for John Deere X330 X350 X354 X370 42-Inch","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThis aftermarket \u003cstrong\u003eM174313 secondary 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\u003cp\u003eThe supplier lists this polyester replacement belt at approximately \u003cstrong\u003e5\/8 inch wide by 108.6 inches long\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eOn the compatible two-belt 42-inch mower-deck path, M174313 is used as the \u003cstrong\u003esecondary spindle-drive belt\u003c\/strong\u003e. A separate primary belt transfers power from the PTO clutch to the mower deck.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Match the original M174313 belt number, installed deck, belt position, dimensions, and pulley routing before ordering. Do not select this belt using the tractor model or 42-inch deck width alone.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAftermarket secondary mower-deck drive belt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplacement Number:\u003c\/strong\u003e M174313\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupplier Reference:\u003c\/strong\u003e BT505-VS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupplier-Listed Width:\u003c\/strong\u003e Approximately 5\/8 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupplier-Listed Length:\u003c\/strong\u003e Approximately 108.6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupplier Metric Length:\u003c\/strong\u003e 2759 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupplier-Listed Profile Height:\u003c\/strong\u003e 13.5 mm \/ approximately 0.53 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Polyester\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\u003eUsed on select John Deere 42-inch mower-deck configurations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eReplaces These Belt Numbers\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eM174313\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSupplier Reference Number\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBT505-VS\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSearch-Friendly Number Formats\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eM174313\u003c\/li\u003e\n\u003cli\u003e174313\u003c\/li\u003e\n\u003cli\u003eBT505-VS\u003c\/li\u003e\n\u003cli\u003eBT505VS\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eBelt Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComponent:\u003c\/strong\u003e Secondary mower-deck drive belt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e Approximately 108.6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMetric Length:\u003c\/strong\u003e 2759 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e Approximately 5\/8 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfile Height:\u003c\/strong\u003e 13.5 mm \/ approximately 0.53 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Polyester\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\u003cp\u003ePublished belt measurements can vary depending on how the belt is positioned and measured. Use the original \u003cstrong\u003eM174313\u003c\/strong\u003e part number as the primary fitment check.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eCompatible John Deere Models\u003c\/h2\u003e\n\u003cp\u003eThe supplier lists this M174313 belt for select 42-inch mower-deck configurations on the following John Deere lawn tractors:\u003c\/p\u003e\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\u003cp\u003e\u003cstrong\u003eFitment note:\u003c\/strong\u003e These are supplier-provided model examples. This belt fits only the mower-deck and belt-routing configurations using M174313.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eSecondary Deck-Belt Position\u003c\/h2\u003e\n\u003cp\u003eThe compatible 42-inch mower deck uses separate primary and secondary belts:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe \u003cstrong\u003eprimary belt\u003c\/strong\u003e transfers power from the engine-mounted PTO clutch to the mower deck.\u003c\/li\u003e\n\u003cli\u003eThe \u003cstrong\u003esecondary belt\u003c\/strong\u003e routes through the mower-deck spindle and idler pulleys.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis M174313 listing is for the \u003cstrong\u003esecondary spindle-drive belt only\u003c\/strong\u003e. It does not include the separate primary deck belt.\u003c\/p\u003e\n\u003cp\u003eOn the compatible two-belt path, the primary belt may be identified as \u003cstrong\u003eM169485 or UC39236\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eJohn Deere X330 Fitment Note\u003c\/h2\u003e\n\u003cp\u003eThe M174313 belt is used on select John Deere X330 tractors equipped with a compatible dedicated 42-inch Mulch deck.\u003c\/p\u003e\n\u003cp\u003eOn that two-belt deck path:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eM169485 \/ UC39236:\u003c\/strong\u003e Primary clutch-to-deck belt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM174313:\u003c\/strong\u003e Secondary spindle-drive belt\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe standard 42A Accel Deep deck uses a different mower-belt path. Confirm the installed deck and original belt number before ordering.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eJohn Deere X350 Fitment Note\u003c\/h2\u003e\n\u003cp\u003eThe supplier lists M174313 for select John Deere X350 tractors with compatible 42-inch mower decks.\u003c\/p\u003e\n\u003cp\u003eThe X350 can be equipped with different mower-deck configurations. Match the original M174313 number and confirm that the required belt is the secondary spindle-drive belt.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eJohn Deere X354 Fitment Note\u003c\/h2\u003e\n\u003cp\u003eThe supplier lists M174313 for select John Deere X354 42-inch mower-deck applications.\u003c\/p\u003e\n\u003cp\u003eConfirm the original belt number, installed deck type, belt count, idler layout, and pulley routing before ordering.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eJohn Deere X370 Fitment Note\u003c\/h2\u003e\n\u003cp\u003eThe supplier lists M174313 for select John Deere X370 tractors equipped with compatible 42-inch mower decks.\u003c\/p\u003e\n\u003cp\u003eDo not order this belt from the X370 model name alone. Match the original M174313 number and two-belt deck configuration.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eM174313 vs. M169485\u003c\/h2\u003e\n\u003cp\u003eM174313 and M169485 perform different jobs on the compatible two-belt mower deck:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eM169485 \/ UC39236:\u003c\/strong\u003e Primary belt between the PTO clutch and mower deck\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eM174313:\u003c\/strong\u003e Secondary belt routing through the spindle-pulley system\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe belts are not interchangeable. This listing includes one M174313 secondary belt only.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eCommon Symptoms of a Worn Secondary Deck Belt\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eThe primary deck belt moves but the mower blades do not turn correctly\u003c\/li\u003e\n\u003cli\u003eOne or both blades turn slowly under cutting load\u003c\/li\u003e\n\u003cli\u003eThe belt squeals when the PTO clutch engages\u003c\/li\u003e\n\u003cli\u003eThe belt 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\u003eUneven blade speed across the mower deck\u003c\/li\u003e\n\u003cli\u003eReduced grass-discharge or mulching performance\u003c\/li\u003e\n\u003cli\u003eBurning-rubber smell near the mower deck\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePark the tractor 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\u003eIdentify the primary and secondary deck belts before disassembly.\u003c\/li\u003e\n\u003cli\u003eInspect both spindle pulleys and all idler pulleys for bearing wear.\u003c\/li\u003e\n\u003cli\u003eInspect the tension arm, tension spring, and belt guides.\u003c\/li\u003e\n\u003cli\u003eConfirm the flat and V-shaped belt surfaces contact the correct pulleys.\u003c\/li\u003e\n\u003cli\u003eMake sure the belt is seated completely inside each pulley groove.\u003c\/li\u003e\n\u003cli\u003eRotate the mower-deck pulley system manually before starting the engine.\u003c\/li\u003e\n\u003cli\u003eReplace seized pulleys or damaged tension components before operating the new belt.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eQuick Ship Fulfillment\u003c\/h2\u003e\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\u003chr\u003e\n\u003ch2\u003eWhy Buy From PTO Direct USA\u003c\/h2\u003e\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 primary and secondary belt-position notes\u003c\/li\u003e\n\u003cli\u003ePractical support when you need help checking compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003ch3\u003eWhat does the M174313 belt fit?\u003c\/h3\u003e\n\u003cp\u003eThe supplier lists M174313 for select John Deere X330, X350, X354, and X370 tractors equipped with compatible 42-inch mower decks.\u003c\/p\u003e\n\u003ch3\u003eHow long is the supplier-listed M174313 belt?\u003c\/h3\u003e\n\u003cp\u003eThe supplier lists the belt at approximately \u003cstrong\u003e108.6 inches long\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eHow wide is the supplier-listed M174313 belt?\u003c\/h3\u003e\n\u003cp\u003eThe supplier lists the belt at approximately \u003cstrong\u003e5\/8 inch wide\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhat material is the M174313 belt made from?\u003c\/h3\u003e\n\u003cp\u003eThe supplier describes the replacement belt as being made from polyester.\u003c\/p\u003e\n\u003ch3\u003eHow many belts are included?\u003c\/h3\u003e\n\u003cp\u003eThis listing includes \u003cstrong\u003eone M174313 belt\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eIs M174313 a primary or secondary deck belt?\u003c\/h3\u003e\n\u003cp\u003eM174313 is used as the \u003cstrong\u003esecondary spindle-drive belt\u003c\/strong\u003e on the compatible two-belt 42-inch mower-deck path.\u003c\/p\u003e\n\u003ch3\u003eDoes this listing include the primary belt?\u003c\/h3\u003e\n\u003cp\u003eNo. This listing includes one M174313 secondary belt only. The compatible primary belt may use the M169485 \/ UC39236 number path.\u003c\/p\u003e\n\u003ch3\u003eDoes M174313 fit the John Deere X330?\u003c\/h3\u003e\n\u003cp\u003eIt fits select X330 tractors equipped with the compatible two-belt 42-inch mower deck. Confirm the original M174313 number before ordering.\u003c\/p\u003e\n\u003ch3\u003eDoes M174313 fit the John Deere X350?\u003c\/h3\u003e\n\u003cp\u003eThe supplier lists select X350 42-inch mower-deck applications. Match the original belt number and confirm the secondary-belt position.\u003c\/p\u003e\n\u003ch3\u003eDoes M174313 fit the John Deere X354?\u003c\/h3\u003e\n\u003cp\u003eThe supplier lists select X354 tractors with compatible 42-inch mower decks. Confirm the original M174313 belt number.\u003c\/p\u003e\n\u003ch3\u003eDoes M174313 fit the John Deere X370?\u003c\/h3\u003e\n\u003cp\u003eThe supplier lists select X370 42-inch mower-deck configurations. Match the installed deck, belt position, and original part number.\u003c\/p\u003e\n\u003ch3\u003eDoes M174313 fit every John Deere 42-inch deck?\u003c\/h3\u003e\n\u003cp\u003eNo. John Deere produced multiple 42-inch deck and belt configurations. Match the original belt number, deck type, belt count, dimensions, and routing.\u003c\/p\u003e\n\u003ch3\u003eIs M174313 the same as M169485?\u003c\/h3\u003e\n\u003cp\u003eNo. M169485 \/ UC39236 is the primary belt on the compatible two-belt deck. M174313 is the secondary spindle-drive belt.\u003c\/p\u003e\n\u003ch3\u003eIs this the tractor traction-drive belt?\u003c\/h3\u003e\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\u003ch3\u003eCan I order this belt using only the tractor model?\u003c\/h3\u003e\n\u003cp\u003eNo. Confirm the original M174313 number, installed mower deck, belt position, dimensions, and pulley routing before ordering.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eRelated John Deere Parts and Guides\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/deck-belt-m169485\"\u003eM169485 \/ UC39236 Primary Deck Belt\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/mower-blades-am140973\"\u003eAM140973 Mulching Blades\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/spindle-assembly-am136733\"\u003eAM136733 \/ AM137483 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\u003chr\u003e\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":53200858612079,"sku":"BELT-296584224906","price":32.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0957\/5058\/6735\/files\/M174313-belt.jpg?v=1783919109","url":"https:\/\/ptodirectusa.com\/products\/deck-belt-m174313","provider":"PTO Direct USA","version":"1.0","type":"link"}