{"product_id":"21245864-voltage-regulator-genuine-volvo-penta","title":"21245864 Voltage Regulator | Genuine Volvo Penta Part","description":"\u003ch2\u003e\n 🔧 Product Description\n\u003c\/h2\u003e\n\u003cp\u003e\n An electronic charging-system regulator used with selected Volvo Penta TAD6 and TAD7 alternator installations. It controls alternator field current to maintain stable battery-charging voltage.\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 TD420VE\n \u003c\/li\u003e\n \u003cli\u003e\n  Volvo Penta TAD620VE\n \u003c\/li\u003e\n \u003cli\u003e\n  Volvo Penta TAD650VE\n \u003c\/li\u003e\n \u003cli\u003e\n  Volvo Penta TAD660VE\n \u003c\/li\u003e\n \u003cli\u003e\n  Volvo Penta TAD750VE\n \u003c\/li\u003e\n \u003cli\u003e\n  Volvo Penta TAD420VE\n \u003c\/li\u003e\n \u003cli\u003e\n  Volvo Penta TAD760VE\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, TAD\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 output voltage\n \u003c\/li\u003e\n \u003cli\u003e\n  Protects batteries and electrical equipment from overcharging\n \u003c\/li\u003e\n \u003cli\u003e\n  Direct replacement only for the specified alternator\n \u003c\/li\u003e\n \u003cli\u003e\n  Direct replacement where part number 21245864 is specified\n \u003c\/li\u003e\n \u003cli\u003e\n  Engine type: Turbocharged industrial diesel with 28-volt charging system\n \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\n 🔌 Function\n\u003c\/h2\u003e\n\u003cp\u003e\n Regulates alternator field current to maintain the specified charging voltage.\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\n \u003c\/li\u003e\n \u003cli\u003e\n  Battery warning lamp remains on\n \u003c\/li\u003e\n \u003cli\u003e\n  Intermittent alternator output\n \u003c\/li\u003e\n \u003cli\u003e\n  Electrical equipment damaged by overvoltage\n \u003c\/li\u003e\n \u003cli\u003e\n  Regulator or alternator overheating\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 Supersession Chain\n\u003c\/h3\u003e\n\u003cul\u003e\n \u003cli\u003e\n  21245864 → Supersedes 20561910 → Supersedes 20460103\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  20561910 earlier number superseded by this part\n \u003c\/li\u003e\n \u003cli\u003e\n  20460103 earlier number superseded by this part\n \u003c\/li\u003e\n \u003cli\u003e\n  20715635 - alternator\n \u003c\/li\u003e\n \u003cli\u003e\n  20460102 and 21067805 - pulleys\n \u003c\/li\u003e\n \u003cli\u003e\n  21067822 - collet\n \u003c\/li\u003e\n \u003cli\u003e\n  941912 - spring washer\n \u003c\/li\u003e\n \u003cli\u003e\n  20441521 - nut\n \u003c\/li\u003e\n \u003cli\u003e\n  20560564 - bracket\n \u003c\/li\u003e\n \u003cli\u003e\n  20567447 - plate\n \u003c\/li\u003e\n \u003cli\u003e\n  20460106 and 20555084 - fasteners\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":53385739469092,"sku":"129184V","price":500.21,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/8115\/7924\/files\/original_618dfaef-2179-4b8e-82b2-8f645347bcff.jpg?v=1788060235","url":"https:\/\/www.sawleysautoandmarine.com.au\/products\/21245864-voltage-regulator-genuine-volvo-penta","provider":"Sawley's Auto and Marine","version":"1.0","type":"link"}