{"product_id":"idler-pulley-95604129","title":"956-04129 Idler Pulley for Cub Cadet RZT 50, MTD \u0026 Troy-Bilt Decks","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003e956-04129 idler pulley\u003c\/strong\u003e is a replacement deck pulley for select \u003cstrong\u003eCub Cadet\u003c\/strong\u003e, \u003cstrong\u003eMTD\u003c\/strong\u003e, \u003cstrong\u003eTroy-Bilt\u003c\/strong\u003e, and related MTD-built mower deck applications using the listed pulley replacement numbers.\u003c\/p\u003e\n\u003cp\u003eThis pulley is commonly used on mower decks replacing \u003cstrong\u003e753-08171\u003c\/strong\u003e, \u003cstrong\u003e756-04129\u003c\/strong\u003e, \u003cstrong\u003e756-04129B\u003c\/strong\u003e, \u003cstrong\u003e756-04129C\u003c\/strong\u003e, \u003cstrong\u003e956-04129\u003c\/strong\u003e, or \u003cstrong\u003e956-04129C\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Specs\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart type:\u003c\/strong\u003e mower deck idler pulley\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary replacement number:\u003c\/strong\u003e 956-04129\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside diameter:\u003c\/strong\u003e 123.6 mm \/ approximately 4.87 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 27.2 mm \/ approximately 1.07 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeck application:\u003c\/strong\u003e select MTD-built mower decks using the listed pulley numbers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity included:\u003c\/strong\u003e 1 idler pulley\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eColor note:\u003c\/strong\u003e Pulley finish or color may vary by supplier or production batch. Fitment is based on the OEM part number, pulley diameter, bore size, height, belt profile, and deck application — not the pulley color.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eCompatible Brands \u0026amp; Model Series\u003c\/h2\u003e\n\u003cp\u003eThis idler pulley is intended for select MTD-built mower deck applications using the listed replacement numbers.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCub Cadet:\u003c\/strong\u003e select RZT 50 and related mower deck applications using the 753-08171 \/ 956-04129 pulley path. For the full RZT 50 deck parts route, see the \u003ca href=\"\/blogs\/deck-parts-guides\/cub-cadet-rzt-50-parts-guide\"\u003eCub Cadet RZT 50 Parts Guide\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMTD:\u003c\/strong\u003e select mower decks using 753-08171, 756-04129, or 956-04129 series pulley numbers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTroy-Bilt:\u003c\/strong\u003e select MTD-built mower decks using the same idler pulley path\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFitment note:\u003c\/strong\u003e This pulley should be matched by original pulley number and physical dimensions before ordering. Similar-looking deck pulleys may use different diameters, heights, bearing sizes, or belt profiles.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eReplaces OEM Idler Pulley Numbers\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCub Cadet:\u003c\/strong\u003e 753-08068A, 753-08171, 756-04129, 756-04129B, 756-04129C, 956-04129, 956-04129C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMTD:\u003c\/strong\u003e 753-08068A, 753-08171, 756-04129, 756-04129B, 756-04129C, 956-04129, 956-04129C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdditional supplier reference:\u003c\/strong\u003e 756-05042\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eImportant Fitment Check\u003c\/h2\u003e\n\u003cp\u003eBefore ordering this idler pulley, confirm:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eYour original pulley number matches \u003cstrong\u003e753-08171\u003c\/strong\u003e, \u003cstrong\u003e756-04129\u003c\/strong\u003e, \u003cstrong\u003e956-04129\u003c\/strong\u003e, or a listed replacement number\u003c\/li\u003e\n\u003cli\u003eYour pulley outside diameter is approximately \u003cstrong\u003e4.87 inches\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eYour pulley height is approximately \u003cstrong\u003e1.07 inches\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eYour deck belt rides correctly on this pulley style\u003c\/li\u003e\n\u003cli\u003eYour mower deck uses the correct idler position and belt routing\u003c\/li\u003e\n\u003cli\u003eYour spindle pulleys, deck belt, and tension system match the same deck part-number path\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMany MTD-built decks look similar but use different idler pulleys, spindle pulleys, and belt routing. Always confirm the original pulley number before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWorking on a Cub Cadet RZT 50?\u003c\/strong\u003e This pulley is part of the confirmed 50-inch deck parts path covered in our \u003ca href=\"\/blogs\/deck-parts-guides\/cub-cadet-rzt-50-parts-guide\"\u003eCub Cadet RZT 50 Parts Guide\u003c\/a\u003e, along with the matching deck belt, blades, spindles, idler pulley, PTO clutch, and full deck rebuild kit.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMatch the original pulley number first whenever possible\u003c\/li\u003e\n\u003cli\u003eConfirm your mower model and deck size\u003c\/li\u003e\n\u003cli\u003eMeasure the outside diameter and height of your original pulley\u003c\/li\u003e\n\u003cli\u003eInspect the bearing, idler arm, belt guides, and deck belt for wear\u003c\/li\u003e\n\u003cli\u003eCheck whether your mower uses more than one idler pulley on the deck\u003c\/li\u003e\n\u003cli\u003eDo not rely on pulley color, deck appearance, or brand name alone\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eCommon Symptoms This Pulley Helps Fix\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDeck belt slipping\u003c\/li\u003e\n\u003cli\u003eBelt squealing during blade engagement\u003c\/li\u003e\n\u003cli\u003eBelt jumping off the deck\u003c\/li\u003e\n\u003cli\u003eNoisy or rough idler pulley bearing\u003c\/li\u003e\n\u003cli\u003eUneven belt tracking\u003c\/li\u003e\n\u003cli\u003eExcess deck vibration\u003c\/li\u003e\n\u003cli\u003ePremature belt wear caused by a worn pulley\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDisconnect the spark plug and remove the key before servicing the mower deck\u003c\/li\u003e\n\u003cli\u003eTake a photo of the belt routing before removing the old pulley\u003c\/li\u003e\n\u003cli\u003eInspect the deck belt before reinstalling it\u003c\/li\u003e\n\u003cli\u003eMake sure the pulley spins freely after installation\u003c\/li\u003e\n\u003cli\u003eConfirm the belt is seated correctly in the pulley path\u003c\/li\u003e\n\u003cli\u003eTest the mower deck at low speed first and listen for noise, squealing, or belt tracking issues\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eWhat’s Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 idler pulley\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eQuantity note:\u003c\/strong\u003e This listing includes \u003cstrong\u003eone\u003c\/strong\u003e idler pulley. Some mower decks use multiple idler pulleys, so order the quantity needed for your repair.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhy Buy From PTO Direct USA?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFitment-first deck part listings\u003c\/li\u003e\n\u003cli\u003eClear OEM and aftermarket pulley number routing\u003c\/li\u003e\n\u003cli\u003eFast USA shipping\u003c\/li\u003e\n\u003cli\u003eSupport for mower owners, repair shops, and small-engine dealers\u003c\/li\u003e\n\u003cli\u003eRelated belts, blades, spindles, deck kits, and PTO clutches available\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eNeed Help Confirming Fitment?\u003c\/h2\u003e\n\u003cp\u003eIf you are unsure whether this idler pulley fits your mower, send us your mower model number, deck size, original pulley number, pulley measurements, and photos of your existing pulley before ordering.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003ch3\u003eDoes this replace 956-04129?\u003c\/h3\u003e\n\u003cp\u003eYes. This idler pulley replaces \u003cstrong\u003e956-04129\u003c\/strong\u003e and related pulley numbers including \u003cstrong\u003e753-08171\u003c\/strong\u003e, \u003cstrong\u003e756-04129\u003c\/strong\u003e, \u003cstrong\u003e756-04129B\u003c\/strong\u003e, \u003cstrong\u003e756-04129C\u003c\/strong\u003e, and \u003cstrong\u003e956-04129C\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eDoes this fit Cub Cadet RZT 50?\u003c\/h3\u003e\n\u003cp\u003eThis pulley is intended for select \u003cstrong\u003eCub Cadet RZT 50\u003c\/strong\u003e and related MTD-built mower deck applications using the \u003cstrong\u003e753-08171 \/ 956-04129\u003c\/strong\u003e idler pulley path. Confirm your original pulley number before ordering. For the full 50-inch deck parts route, see the \u003ca href=\"\/blogs\/deck-parts-guides\/cub-cadet-rzt-50-parts-guide\"\u003eCub Cadet RZT 50 Parts Guide\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhat size is this pulley?\u003c\/h3\u003e\n\u003cp\u003eThis pulley measures approximately \u003cstrong\u003e123.6 mm\u003c\/strong\u003e across, or about \u003cstrong\u003e4.87 inches\u003c\/strong\u003e, with a height of approximately \u003cstrong\u003e27.2 mm\u003c\/strong\u003e, or about \u003cstrong\u003e1.07 inches\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eWill the pulley color match my original pulley?\u003c\/h3\u003e\n\u003cp\u003eNot always. Pulley color or finish can vary by supplier or production batch. Fitment should be confirmed by part number, pulley diameter, height, bearing size, belt profile, and deck application.\u003c\/p\u003e\n\u003ch3\u003eHow many pulleys are included?\u003c\/h3\u003e\n\u003cp\u003eThis listing includes \u003cstrong\u003eone\u003c\/strong\u003e idler pulley.\u003c\/p\u003e\n\u003ch3\u003eCan I order this pulley by appearance only?\u003c\/h3\u003e\n\u003cp\u003eNo. Do not order by appearance alone. Match the original pulley number, dimensions, deck belt path, and mower model before ordering.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003e\u003cstrong\u003eNeed the full deck setup?\u003c\/strong\u003e View the related \u003ca href=\"\/products\/deck-kit-cub-cadet-rzt-50-95404044\"\u003e50-inch deck rebuild kit for Cub Cadet RZT 50, MTD, and Troy-Bilt\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNeed matching deck parts?\u003c\/strong\u003e Browse \u003ca href=\"\/collections\/belts\"\u003emower deck belts\u003c\/a\u003e, \u003ca href=\"\/collections\/blades\"\u003emower blades\u003c\/a\u003e, \u003ca href=\"\/collections\/spindles\"\u003espindle assemblies\u003c\/a\u003e, and \u003ca href=\"\/collections\/deck-parts\"\u003emower deck parts\u003c\/a\u003e.\u003c\/p\u003e","brand":"PTO Direct USA","offers":[{"title":"Default Title","offer_id":53128853487983,"sku":"PULLEY-MTD-95604129","price":24.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0957\/5058\/6735\/files\/idler-pulley-95604129.jpg?v=1781836331","url":"https:\/\/ptodirectusa.com\/products\/idler-pulley-95604129","provider":"PTO Direct USA","version":"1.0","type":"link"}