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Technical Specification
PRODUCT NUMBER 13919N22925N23328N13592N1391921881N23298N23820NA6018A6025A6052A6061A6063A6077A6079
Voltage 1212121212121212121212121212
Output Current 140601255013012015080100100130120105
Design IR/IFIR/IFER/IFIR/IFIR/IFIR/IF
Manufacturer DensoDensoDensoDensoDensoDensoDenso
Pulley S6S6V1SC5SC6AFPAFPAFPAFPAFPAPAFP
Rotation CWCWCWCWCW

Q 1. What does this alternator replace — which OE part numbers does it cross-reference?

A. The WAI 12771N carries ten OE cross-references across six brands: Denso 101211-2941 and Denso OEM 1012112941; Delco Remy DRA0467; Cummins C6008611611; JCB 721150865; KOMATSU 600-861-1611, Komatsu 6008611611, and Komatsu R6008611611; and Sando 20402630 and Sando 20402631. If your original unit carries any of these numbers, this is the direct aftermarket replacement. Cross-reference data is not available for our Fit Guarantee; use the catalogue search by OEM number or ask Simon to confirm suitability for your machine.

Q 2. Does the WAI 12771N replace a Delco Remy alternator?

A. Yes. The 12771N is cross-referenced to Delco Remy DRA0467. If the alternator on your machine carries that reference, the WAI 12771N is the designated aftermarket replacement. Search our catalogue by that number or ask Simon to verify fitment for your specific application.

Q 3. Which machines is the WAI 12771N listed to fit?

A. Fitment data records the Rem 2100D (2004–2009). Buyers with Cummins-engined plant, JCB, or Komatsu equipment should match by the OE cross-references listed for this part rather than by machine model alone. Use the catalogue's OEM number search or ask Simon — every confirmed fitment is backed by our Fit Guarantee.

Q 4. What are the key electrical and mechanical specs of the 12771N?

A. The alternator operates at 12V with a 60A output, clockwise rotation, and is fitted with a groove pulley. It is built to IR/IF (internal regulator / internal fan) specification, meaning the voltage regulator is integrated within the unit. It is supplied brand new.

Q 5. What does IR/IF mean on this alternator?

A. IR/IF stands for Internal Regulator / Internal Fan. The voltage regulator is housed inside the alternator casing rather than mounted externally, and the cooling fan is also internal. This is the original design specification for the Denso units this part replaces, so no external regulator wiring is required — the 12771N installs as a direct swap.

Q 6. 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 7. 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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