{"product_id":"20412578-voltage-regulator-genuine-volvo-penta","title":"20412578 Voltage Regulator | Genuine Volvo Penta Part","description":"\u003ch2\u003e\n 🔧 Product Description\n\u003c\/h2\u003e\n\u003cp\u003e\n Genuine Volvo Penta electronic voltage regulator for the 28 V, 35 A charging-system alternator family. This is the regulator specified directly for alternator 20412735.\n\u003c\/p\u003e\n\u003ch2\u003e\n 🚤 Compatibility\n\u003c\/h2\u003e\n\u003cp\u003e\n Typically suits:\n\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003e\n  Volvo Penta TD720GE\n \u003c\/li\u003e\n \u003cli\u003e\n  Volvo Penta TD520GE\n \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\n \u003cli\u003e\n  \u003cstrong\u003e\n   Engine Family:\n  \u003c\/strong\u003e\n  TD\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  Controls alternator field current and charging voltage\n \u003c\/li\u003e\n \u003cli\u003e\n  Designed for nominal 24 V electrical systems\n \u003c\/li\u003e\n \u003cli\u003e\n  Used with 28 V, 35 A alternators\n \u003c\/li\u003e\n \u003cli\u003e\n  Requires alternator-number verification\n \u003c\/li\u003e\n \u003cli\u003e\n  Electronic component is not repaired internally\n \u003c\/li\u003e\n \u003cli\u003e\n  Engine type: Volvo Penta 5- and 7-litre industrial diesel\n \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\n 🔌 Function\n\u003c\/h2\u003e\n\u003cp\u003e\n Regulates alternator output near the specified 28 V charging level by controlling field current.\n\u003c\/p\u003e\n\u003ch2\u003e\n ⚠️ Common Signs of Failure\n\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n  Battery not charging\n \u003c\/li\u003e\n \u003cli\u003e\n  Charging voltage too high or too low\n \u003c\/li\u003e\n \u003cli\u003e\n  Charge warning lamp remaining on\n \u003c\/li\u003e\n \u003cli\u003e\n  Battery boiling or repeated discharge\n \u003c\/li\u003e\n \u003cli\u003e\n  Intermittent alternator output\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 at the main switch and disconnect the negative lead before working on the charging circuit, and never disconnect a battery while the engine is running\n \u003c\/li\u003e\n \u003cli\u003e\n  Rule out the simple causes before condemning a regulator — a slack or glazed drive belt, corroded or loose battery and alternator connections, a poor engine-to-battery earth, or a tired battery all produce the same symptoms\n \u003c\/li\u003e\n \u003cli\u003e\n  Check the brushes and slip rings while the regulator is off; a worn brush set gives the same low or erratic output\n \u003c\/li\u003e\n \u003cli\u003e\n  Fit clean and dry, seat any insulating washers and bushes in their original order so nothing bridges across them, and tighten the terminals firmly without crushing them\n \u003c\/li\u003e\n \u003cli\u003e\n  Measure charging voltage at the battery with the engine running once the regulator is fitted, and compare it with the value specified for your engine and battery type\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 \/ Related Numbers\n\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003e\n  20412735 - related alternator\n \u003c\/li\u003e\n \u003cli\u003e\n  20584337 - later 28 V 35 A alternator\n \u003c\/li\u003e\n \u003cli\u003e\n  20797555 - later regulator reference\n \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\n OEM Reman Alternatives\n\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003e\n  3803512 - exchange alternator references\n \u003c\/li\u003e\n \u003cli\u003e\n  3803969 - exchange alternator references\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":53385747628324,"sku":"6527970","price":321.05,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/8115\/7924\/files\/original_0d968250-3792-4689-88e5-46f2fcd4b5fa.jpg?v=1777198607","url":"https:\/\/www.sawleysautoandmarine.com.au\/products\/20412578-voltage-regulator-genuine-volvo-penta","provider":"Sawley's Auto and Marine","version":"1.0","type":"link"}