{"product_id":"pto-clutch-04387900","title":"04387900 PTO Clutch Replacement for Ariens Gravely | Replaces 4387900","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003eAriens Gravely PTO clutch 04387900 replacement\u003c\/strong\u003e also replaces \u003cstrong\u003e4387900\u003c\/strong\u003e and cross-references \u003cstrong\u003eXtreme X0588\u003c\/strong\u003e, \u003cstrong\u003eOgura GT1A-EH07\u003c\/strong\u003e, \u003cstrong\u003eOgura 53594500\u003c\/strong\u003e, \u003cstrong\u003eStens 255-066X\u003c\/strong\u003e, and \u003cstrong\u003eRotary 15772\u003c\/strong\u003e. It is designed for select \u003cstrong\u003eGravely ZT HD\u003c\/strong\u003e zero-turn mower applications that use this 1-inch bore, 6-inch pulley electric PTO clutch setup.\u003c\/p\u003e\n\u003cp\u003eCommonly used on Gravely ZT HD 44\", 48\", 52\", and 60\" deck models, this clutch helps restore smooth blade engagement, proper belt drive speed, and dependable mowing performance under heavier deck loads.\u003c\/p\u003e\n\u003cp\u003eKey specs include a \u003cstrong\u003e6.00-inch pulley diameter\u003c\/strong\u003e, \u003cstrong\u003e1-inch crankshaft bore\u003c\/strong\u003e, \u003cstrong\u003eCCW rotation\u003c\/strong\u003e, and an \u003cstrong\u003eintegrated water-tight wiring lead\u003c\/strong\u003e. For best fitment, match your original clutch number and compare the main specs before ordering.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDirect replacement electric PTO clutch assembly for select Ariens \/ Gravely zero-turn mower applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePulley Diameter:\u003c\/strong\u003e 6.00\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrankshaft Size:\u003c\/strong\u003e 1\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotation:\u003c\/strong\u003e CCW (counter-clockwise)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 12V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBelt Width Compatibility:\u003c\/strong\u003e 1\/2\" or 5\/8\" A\/B belt profile\u003c\/li\u003e\n\u003cli\u003eIntegrated water-tight wiring lead\u003c\/li\u003e\n\u003cli\u003eDesigned for reliable blade engagement on supported ZT HD deck setups\u003c\/li\u003e\n\u003cli\u003eFully assembled and ready to install after fitment verification\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eCompatible With These Brands \u0026amp; Model Series\u003c\/h2\u003e\n\u003cp\u003eThis PTO clutch fits select Gravely ZT HD models using OEM part number \u003cstrong\u003e04387900\u003c\/strong\u003e or \u003cstrong\u003e4387900\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eGravely ZT HD Series\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e991082:\u003c\/strong\u003e ZT 48HD, serial 010000–019999 and 030000 and up\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e991083:\u003c\/strong\u003e ZT 52HD, serial 010000–019999 and 030000 and up\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e991084:\u003c\/strong\u003e ZT 60HD, serial 010000–019999 and 030000 and up\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e991090:\u003c\/strong\u003e ZT 44HD, serial 010000–019999 and 030000 and up\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e991091:\u003c\/strong\u003e ZT 60HD, serial 000101–019999\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFitment can vary by model, serial range, engine package, wiring connector, and original clutch specification. Always confirm your original clutch number and pulley diameter before ordering.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eModel \u0026amp; Serial Range Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGravely 991082 ZT 48HD:\u003c\/strong\u003e fits serial 010000–019999 and 030000 and up\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGravely 991083 ZT 52HD:\u003c\/strong\u003e fits serial 010000–019999 and 030000 and up\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGravely 991084 ZT 60HD:\u003c\/strong\u003e fits serial 010000–019999 and 030000 and up\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGravely 991090 ZT 44HD:\u003c\/strong\u003e fits serial 010000–019999 and 030000 and up\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGravely 991091 ZT 60HD:\u003c\/strong\u003e fits serial 000101–019999\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCritical wiring note:\u003c\/strong\u003e Some 020000-series machines may require the original OEM adapter harness to be reused. If your model 991082 falls between serial 020000–022448, model 991083 between serial 020000–021876, or model 991084 between serial 020000–021811, verify your wiring adapter before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDisputed fitment warning:\u003c\/strong\u003e Some Ariens Zoom and Gravely ZT 50 listings incorrectly group this 6.00\" pulley clutch with machines that use the smaller 5-3\/8\" pulley clutch family. If your mower is an Ariens Zoom, Gravely consumer ZT, or a model not listed above, measure your original clutch pulley before ordering.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eReplaces OEM Part Numbers\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAriens \/ Gravely:\u003c\/strong\u003e 04387900, 4387900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOgura:\u003c\/strong\u003e GT1A-EH07, GT1AEH07, 53594500\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eManufacturer \u0026amp; Aftermarket Cross-Reference Numbers\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eXtreme:\u003c\/strong\u003e X0588\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSTENS:\u003c\/strong\u003e 255-066X\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRotary:\u003c\/strong\u003e 15772\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eWhat’s Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eComplete electric PTO clutch assembly\u003c\/li\u003e\n\u003cli\u003eFactory-balanced 6.00\" pulley\u003c\/li\u003e\n\u003cli\u003ePre-installed bearing assembly\u003c\/li\u003e\n\u003cli\u003eElectromagnetic coil\u003c\/li\u003e\n\u003cli\u003eIntegrated wiring lead\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Engine mounting hardware, anti-rotation brackets, and external adapter harnesses are not included. Reuse your original OEM hardware and adapter harness where required.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eHow to Confirm Fitment\u003c\/h2\u003e\n\u003cp\u003eThe most reliable way to confirm compatibility is to match the OEM part number stamped on your original PTO clutch. If the number is worn or unreadable use model fitment information then carefully compare the \u003cstrong\u003e6.00-inch pulley diameter\u003c\/strong\u003e, \u003cstrong\u003e1-inch crankshaft bore\u003c\/strong\u003e, \u003cstrong\u003eCCW rotation\u003c\/strong\u003e, wiring connector, and anti-rotation bracket slot before installation.\u003c\/p\u003e\n\u003cp\u003eA matching mower brand or model name alone does not guarantee fitment. Similar Ariens and Gravely machines can use different PTO clutch families depending on serial number, engine package, deck size, production year, wiring style, and chassis design.\u003c\/p\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\u003e\u003ca title=\"Fitment Guarantee Explained\" href=\"\/pages\/fitment-guarantee\"\u003eFitment Guarantee\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e1-year warranty\u003c\/li\u003e\n\u003cli\u003ePremium product images for easy identification\u003c\/li\u003e\n\u003cli\u003eTrusted replacement supplier for homeowners and professionals\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003cp\u003eNeed a different fitment? Browse the full \u003ca href=\"\/collections\/pto-clutches\"\u003eelectric PTO clutch catalog\u003c\/a\u003e to see all available replacement options.\u003c\/p\u003e","brand":"PTO Direct USA","offers":[{"title":"Default Title","offer_id":52916567081327,"sku":"PTO-04387900","price":174.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0957\/5058\/6735\/files\/04387900-pto-clutch-replacement-main.jpg?v=1777788301","url":"https:\/\/ptodirectusa.com\/products\/pto-clutch-04387900","provider":"PTO Direct USA","version":"1.0","type":"link"}