{"product_id":"21727737-alternator-genuine-volvo-penta","title":"21727737 Alternator | Genuine Volvo Penta Part","description":"\u003ch2\u003e\n 🔧 Product Description\n\u003c\/h2\u003e\n\u003cp\u003e\n A genuine heavy-duty three-phase alternator used on selected Volvo Penta industrial and marine diesel engines. It supplies regulated charging current for the battery bank and engine electrical loads.\n\u003c\/p\u003e\n\u003ch2\u003e\n 🚤 Compatibility\n\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n  \u003cstrong\u003e\n   HP Range:\n  \u003c\/strong\u003e\n  Approximately 250-400 HP\n \u003c\/li\u003e\n \u003cli\u003e\n  \u003cstrong\u003e\n   Year Range:\n  \u003c\/strong\u003e\n  Approximately 2010 - 2021\n \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\n ⚙️ Key Features\n\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n  Heavy-duty three-phase alternator construction\n \u003c\/li\u003e\n \u003cli\u003e\n  Integrated or matched voltage regulation\n \u003c\/li\u003e\n \u003cli\u003e\n  Industrial-engine heat and vibration resistance\n \u003c\/li\u003e\n \u003cli\u003e\n  Factory mounting and pulley alignment\n \u003c\/li\u003e\n \u003cli\u003e\n  Direct replacement for the specified charging system\n \u003c\/li\u003e\n \u003cli\u003e\n  Engine type: 7.7L inline six-cylinder turbocharged industrial diesel\n \u003c\/li\u003e\n\n\u003cli\u003e\n Also supersedes Volvo part numbers 3090430 and 3803573\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\n 🔌 Function\n\u003c\/h2\u003e\n\u003cp\u003e\n An engine-driven charging unit that converts mechanical rotation into regulated electrical power for the batteries and electrical system.\n\u003c\/p\u003e\n\u003ch2\u003e\n ⚠️ Common Signs of Failure\n\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n  Low or high charging voltage\n \u003c\/li\u003e\n \u003cli\u003e\n  Battery warning lamp remains active\n \u003c\/li\u003e\n \u003cli\u003e\n  Bearing noise or pulley wobble\n \u003c\/li\u003e\n \u003cli\u003e\n  Overheated output cable or terminals\n \u003c\/li\u003e\n \u003cli\u003e\n  Intermittent charging as the unit warms\n \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\n 🛠️ Service Notes\n\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n  Isolate the batteries before you start, and never disconnect the alternator or battery cables with the engine running — that will destroy the diodes\n \u003c\/li\u003e\n \u003cli\u003e\n  Reconnect exactly as it came off, correct polarity, terminals clean and tight, and check the earth path through the mountings and engine is sound\n \u003c\/li\u003e\n \u003cli\u003e\n  Check the pulleys line up and the belt runs true; renew a glazed, cracked or oil-contaminated belt at the same time and tension it by the procedure in the manual for your engine\n \u003c\/li\u003e\n \u003cli\u003e\n  Support the alternator while you fit and tighten the mounting and adjusting bolts to the manual's figures, and never lever against the alternator body or end covers\n \u003c\/li\u003e\n \u003cli\u003e\n  After fitting, confirm the charge warning goes out and charging voltage is correct, and recheck belt tension after the first running period\n \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\n 🔄 Supersession \u0026amp; Cross Reference\n\u003c\/h2\u003e\n\u003ch3\u003e\n OEM Supersession Chain\n\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003e\n  21727737 → Supersedes 21048177 → Supersedes 21048174 → Supersedes 3986428 → Supersedes 3803574\n \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\n OEM \/ Related Numbers\n\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003e\n  21048177 earlier number superseded by this part\n \u003c\/li\u003e\n \u003cli\u003e\n  3986429 earlier number superseded by this part\n \u003c\/li\u003e\n \u003cli\u003e\n  21048174 earlier number superseded by this part\n \u003c\/li\u003e\n \u003cli\u003e\n  3986428 earlier number superseded by this part\n \u003c\/li\u003e\n \u003cli\u003e\n  3803574 earlier number superseded by this part\n \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\n 📦 Condition\n\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n  Genuine Volvo Penta part\n \u003c\/li\u003e\n \u003cli\u003e\n  Brand new\n \u003c\/li\u003e\n \u003cli\u003e\n  Supplied in original or equivalent packaging\n \u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"Volvo Penta","offers":[{"title":"Default Title","offer_id":53379332505892,"sku":"983954G","price":1662.73,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/8115\/7924\/files\/original_0b75c595-1787-435f-be25-7c446fa78c4a.jpg?v=1788056602","url":"https:\/\/www.sawleysautoandmarine.com.au\/products\/21727737-alternator-genuine-volvo-penta","provider":"Sawley's Auto and Marine","version":"1.0","type":"link"}