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Technical Specification
PRODUCT NUMBER 14482N20539N21610N23853N21173N22155N23791N8440NA4033A4058A4072A4084A4085A4103A9012
Voltage 121212121212121212121212121212
Output Current 12012490901109010010570807085110
Design IR/IFIR/IFIR/IFIR/IFIR/IFIR/IF
Manufacturer MarelliMarelliElectropreciziaVISTEONMarelliFordMandoFord
Pulley COUPLERS6S6SC7S6APAPAPAPAPAP
Rotation CWCWCWCW

Q 1. What machines or engines does the WAI 20531N fit?

A. This alternator fits the Thermo King APU TriPac (All variants) and the Yanmar 2TNV70 (All variants) — two applications in total. To confirm fit for your specific machine or engine variant, use the selection widget or search our cross-referenced catalogue by OEM number or machine model. Every fitment shown is backed by our Fit Guarantee.

Q 2. Which original-equipment part numbers does this alternator replace?

A. The WAI 20531N cross-references 11 OE numbers in total, including THERMO KING 416990, THERMO KING 418464, THERMO KING 8418464, THERMOKING 41-6990, THERMOKING 41-8464, THERMOKING 841-8464, Pal Magnaton 1E32216G02, Pal Magnaton 1E53365G02, Pal Magnaton 9515593, MAGNETON 9515.593, and Pasco A150243. If your existing unit carries one of these numbers, this is the confirmed replacement. You can also search our catalogue by OEM number to verify.

Q 3. Is the rotation direction important, and which way does this alternator rotate?

A. Yes — rotation direction is a critical fitment factor. The WAI 20531N rotates counter-clockwise (CCW). Before ordering, check your existing alternator's rotation marking or documentation to ensure it matches. Fitting an alternator with the wrong rotation can cause immediate belt and drive damage.

Q 4. What are the key electrical specifications of this alternator?

A. The WAI 20531N is a 12-volt, 65-amp alternator built to an IR/EF (internal regulator / external fan) design. It is supplied brand new by Magneton. These figures should be matched against the requirements of your charging system before fitment.

Q 5. How do I confirm this part fits my vehicle or machine?

A. Use the selection widget to match your make, model and engine, or search our cross-referenced catalogue by OEM number, machine model or equivalent part across brands. If your vehicle is not listed, ask Simon. Every fitment shown is backed by our Fit Guarantee.

Q 6. Is this part covered by your Fit Guarantee?

A. Yes. Every vehicle and OE cross-reference shown for this part is checked against manufacturer data and backed by our Fit Guarantee. If it is not right, our Fit Guarantee or hassle-free returns have you covered.

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