{"product_id":"deck-pulley-am135526","title":"AM135526 Flat Idler Pulley Replacement for John Deere Mower Decks","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThis aftermarket \u003cstrong\u003eAM135526 flat idler pulley\u003c\/strong\u003e is a replacement mower deck drive sheave for select \u003cstrong\u003eJohn Deere lawn tractors and zero-turn mowers\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eUse this pulley when the original part or model-specific John Deere parts diagram calls for \u003cstrong\u003eAM135526\u003c\/strong\u003e. The flat pulley surface runs against the back side of the mower deck belt and helps maintain proper belt routing and tension.\u003c\/p\u003e\n\u003cp\u003eDo not order by mower model or pulley appearance alone. John Deere mower decks can use several different idler pulleys in separate positions.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAftermarket flat idler pulley assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Replacement Number:\u003c\/strong\u003e AM135526\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e mower deck flat idler pulley \/ drive sheave assembly\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutside Diameter:\u003c\/strong\u003e approximately 132.5 mm – 5.22 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore \/ Center Hole:\u003c\/strong\u003e approximately 17 mm – 0.67 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Height:\u003c\/strong\u003e approximately 30.5 mm – 1.20 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e steel\u003c\/li\u003e\n\u003cli\u003eDesigned to run against the flat or back side of the mower deck belt\u003c\/li\u003e\n\u003cli\u003eComplete replacement pulley with center bearing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eCompatible John Deere Models \u0026amp; Series\u003c\/h2\u003e\n\u003cp\u003eThis pulley fits select mower deck configurations within the following John Deere model families:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eX300 Series:\u003c\/strong\u003e X300, X304, X310, X320, X324, X330, X350, X350R, X354 and X370\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eX500 Series:\u003c\/strong\u003e X500, X520, X534 and X540\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEZtrak and ZTrak:\u003c\/strong\u003e Z245, Z255, Z355E, Z425, Z435 and Z445\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFitment note:\u003c\/strong\u003e Not every deck configuration within these model families uses AM135526. Confirm the mower model, deck size, serial number and exact pulley callout in the model-specific parts diagram.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eReplaces OEM Part Numbers\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eJohn Deere AM135526\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eAftermarket Cross-Reference Numbers\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOregon:\u003c\/strong\u003e 34-103\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStens:\u003c\/strong\u003e 280-241\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotary:\u003c\/strong\u003e 14242\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8TEN:\u003c\/strong\u003e 810-CID2325L\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eConfirm the original pulley or OEM diagram calls for \u003cstrong\u003eAM135526\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eVerify the mower model, serial number and deck size\u003c\/li\u003e\n\u003cli\u003eConfirm the pulley runs against the flat side of the belt\u003c\/li\u003e\n\u003cli\u003eCompare the outside diameter, center-hole size and pulley height\u003c\/li\u003e\n\u003cli\u003eInspect the mounting bolt, spacer and washers for damage\u003c\/li\u003e\n\u003cli\u003eCheck the deck belt, tension spring and other pulleys for wear\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eCommon Symptoms of a Worn Idler Pulley\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGrinding, rattling or squealing from the mower deck\u003c\/li\u003e\n\u003cli\u003eDeck belt repeatedly jumping off the pulleys\u003c\/li\u003e\n\u003cli\u003eVisible pulley wobble or bearing movement\u003c\/li\u003e\n\u003cli\u003eUneven or damaged mower deck belt edges\u003c\/li\u003e\n\u003cli\u003eExcessive heat around the idler pulley bearing\u003c\/li\u003e\n\u003cli\u003eReduced blade speed caused by poor belt tracking or tension\u003c\/li\u003e\n\u003cli\u003ePulley that does not rotate smoothly by hand\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA seized spindle, damaged belt, weak tension spring or misaligned mounting bracket can quickly damage a replacement pulley. Inspect the complete deck-belt system before installation.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhat’s Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 aftermarket AM135526 flat idler pulley assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eWhy Buy From PTO Direct USA?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFast USA shipping\u003c\/li\u003e\n\u003cli\u003eFitment-focused replacement-parts support\u003c\/li\u003e\n\u003cli\u003eClear OEM part-number matching\u003c\/li\u003e\n\u003cli\u003eReplacement belts, blades, spindles and deck pulleys available\u003c\/li\u003e\n\u003cli\u003eSupport for homeowners, repair shops and landscape crews\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eNeed Help Confirming Fitment?\u003c\/h2\u003e\n\u003cp\u003eStill not sure which deck pulley fits your mower? \u003ca href=\"\/pages\/contact\"\u003e\u003cstrong\u003eContact us for fitment help\u003c\/strong\u003e\u003c\/a\u003e and send a clear picture of the mower identification tag or the original pulley part number.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003ch3\u003eWhat does this idler pulley replace?\u003c\/h3\u003e\n\u003cp\u003eThis aftermarket flat idler pulley replaces \u003cstrong\u003eJohn Deere AM135526\u003c\/strong\u003e on compatible mower deck applications.\u003c\/p\u003e\n\u003ch3\u003eWhat are the approximate AM135526 pulley dimensions?\u003c\/h3\u003e\n\u003cp\u003eThe replacement pulley measures approximately \u003cstrong\u003e132.5 mm – 5.22 inches outside diameter\u003c\/strong\u003e, with a \u003cstrong\u003e17 mm – 0.67-inch bore\u003c\/strong\u003e and an overall height of approximately \u003cstrong\u003e30.5 mm – 1.20 inches\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eDoes AM135526 fit every John Deere X300 or X500 mower?\u003c\/h3\u003e\n\u003cp\u003eNo. AM135526 is used on select mower deck configurations within the X300 and X500 families. Match the part number shown in the exact model and deck diagram.\u003c\/p\u003e\n\u003ch3\u003eDoes AM135526 fit John Deere Z425?\u003c\/h3\u003e\n\u003cp\u003eAM135526 is used in select John Deere Z425 mower deck configurations. Because the deck can contain several different idler positions, confirm the AM135526 diagram callout before ordering.\u003c\/p\u003e\n\u003ch3\u003eIs AM135526 the same as AM128118 or AM143737?\u003c\/h3\u003e\n\u003cp\u003eNo. These are separate John Deere pulley numbers that may be used in different positions within the same mower deck system. Do not substitute one for another unless the exact John Deere diagram or an official supersession specifically confirms it.\u003c\/p\u003e\n\u003ch3\u003eWhich side of the belt contacts this pulley?\u003c\/h3\u003e\n\u003cp\u003eAM135526 is a flat idler pulley designed to run against the flat or back side of the mower deck belt.\u003c\/p\u003e\n\u003ch3\u003eCan I order this pulley by appearance?\u003c\/h3\u003e\n\u003cp\u003eNo. Similar-looking pulleys can have different center holes, diameters, offsets and bearing locations. Match the original AM135526 part number and physical dimensions first.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eRelated John Deere Guides \u0026amp; Parts\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/john-deere-quick-reference\/john-deere-z425\"\u003e\u003cstrong\u003eJohn Deere Z425 PTO clutch and deck parts quick reference\u003c\/strong\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/blogs\/john-deere-quick-reference\"\u003e\u003cstrong\u003eJohn Deere Model Reference Quick Lookup Library\u003c\/strong\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/pulleys\"\u003e\u003cstrong\u003eBrowse mower deck pulleys and idlers\u003c\/strong\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/belts\"\u003e\u003cstrong\u003eBrowse mower deck belts\u003c\/strong\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PTO Direct USA","offers":[{"title":"Default Title","offer_id":53224649523567,"sku":"CAL-295592883232","price":27.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0957\/5058\/6735\/files\/AM135526-pulley.jpg?v=1784431706","url":"https:\/\/ptodirectusa.com\/products\/deck-pulley-am135526","provider":"PTO Direct USA","version":"1.0","type":"link"}