Generator To Alternator Conversion Backing Plate, 3 Piece

Generator to Alternator Conversion Backing Plate - 3-Piece Kit

Modernize your vintage Volkswagen’s charging system with the Generator to Alternator Conversion Backing Plate from Appletree Auto. When upgrading from an older 6V or 12V generator to a modern, high-output alternator, the original backing plate is no longer compatible due to the different dimensions of the alternator housing. This precision-engineered 3-piece kit provides the necessary spacing and support to mount your new alternator securely to the fan shroud, ensuring that your cooling fan is perfectly centered and your belt alignment is spot-on.

Constructed from heavy-duty steel for maximum durability, this kit includes the inner and outer plates along with the essential spacer hub. A common issue with electrical upgrades is belt squeal or premature wear caused by pulley misalignment; this Appletree Auto conversion plate solves that problem by providing a professional, factory-style fit. Whether you are performing a 12V conversion or simply looking for better electrical reliability for your headlights and accessories, this backing plate is a mandatory component for a successful installation.

Product Fitment & Compatibility

This backing plate kit is designed for Volkswagen Type 1 based air-cooled engines (1200cc - 1600cc+) when converting from a factory generator to a standard 12-volt alternator.

• Volkswagen Beetle (Standard): 1950 - 1977
• Volkswagen Super Beetle: 1971 - 1979
• Volkswagen Karmann Ghia: 1956 - 1974
• Volkswagen Bus / Transporter (Type 2): 1950 - 1971 (Type 1 Engines)
• Volkswagen Thing (Type 181): 1973 - 1974
• Custom Sand Rails & Dune Buggies: All years with Type 1 alternator setups

Tech Tips & Installation Advice

• Check Fan Clearance: Before final tightening, rotate the alternator by hand to ensure the internal cooling fan is not rubbing against the backing plate or the fan shroud. Even a slight rub can lead to heat buildup and noise.
• Belt Alignment: Once installed, use a straight edge across the crank pulley and the alternator pulley. If the belt is not perfectly straight, you may need to adjust the number of shims behind the pulley or verify the seating of the 3-piece plate assembly.
• Hardware Tip: We recommend using new hardware and a small amount of medium-strength thread locker on the screws that mount the plate to the fan shroud. Constant engine vibration can cause these small fasteners to back out over time.
• Wiring Safety: When converting to an alternator, remember that most modern alternators have internal regulators. Ensure you bypass or remove your old external voltage regulator and upgrade your main charging wire to a heavier gauge to handle the increased amperage safely.