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| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £9.95 | 7 to 10 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £9.95 | 7 to 10 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £5.49 | 1 to 2 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £9.95 | 5 to 7 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £9.95 | 7 to 10 working days |
Product Number: 12001N
The WAI 12001N is a brand-new 12V 40A alternator. It is built to replace Mitsubishi, Denso, and Delco Remy original-equipment units on Caterpillar agricultural and industrial machines. Designed to the Denso IR/EF specification, it covers 18 Caterpillar applications including the 910, 931, 931B, 931C II, 935B, 935C II, and 951 Trax Cavator.
Constructed to OE design standards, the 12001N features clockwise rotation and a groove pulley, matching the original mounting and drive arrangement without modification. The internal regulator and end-frame (IR/EF) configuration means the voltage regulator is housed within the unit itself, simplifying installation on machines where an external regulator is not fitted.
With 39 cross-referenced OE part numbers — spanning Mitsubishi, Denso, and Delco Remy — this alternator is the correct replacement across a broad spread of Caterpillar compact track loaders and crawler dozers from the mid-1970s through the early 1990s.
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| Type | Alternator |
|---|---|
| Manufacturer | Denso |
| Design | IR/EF |
| Voltage | 12V |
| Output | 40A |
| Rotation | CW |
| Pulley | Groove Pulley |
| Condition | Brand New |
| Engine Parts | Product Number | Product Name | Recommended Units | Product Price |
|---|
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Standard Delivery: £5.49
Delivery Estimate: 1 to 2 working days
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| Technical Specification | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PRODUCT NUMBER | 13919N | 22925N | 23328N | 13592N | 13919 | 21881N | 23298N | 23820N | A6018 | A6025 | A6052 | A6061 | A6063 | A6077 | A6079 |
| Voltage | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | |
| Output Current | 140 | 60 | 125 | 50 | 130 | 120 | 150 | 80 | 100 | 100 | 130 | 120 | 105 | ||
| Design | IR/IF | IR/IF | ER/IF | IR/IF | IR/IF | IR/IF | |||||||||
| Manufacturer | Denso | Denso | Denso | Denso | Denso | Denso | Denso | ||||||||
| Pulley | S6 | S6 | V1 | SC5 | SC6 | AFP | AFP | AFP | AFP | AFP | AP | AFP | |||
| Rotation | CW | CW | CW | CW | CW | ||||||||||
A. The WAI 12001N replaces 16 Mitsubishi OE references, including Mitsubishi A2T16387, Mitsubishi A2T22771, and Mitsubishi A2T40577B, among others. In total, 39 OE cross-references are on record for this part across Mitsubishi, Denso, and Delco Remy. Use our cross-referenced catalogue search to look up your exact Mitsubishi number and confirm the match.
A. Yes. It cross-references 8 Denso OE numbers including Denso 021000-7360, Denso 021000-8420, and Denso 100211-0010, as well as Delco Remy DRA2601. Search our catalogue by any of these verbatim references to verify fitment for your machine.
A. The 12001N covers 18 Caterpillar Ag. & Ind. applications, including the 910 (1979–1989), 931 (1975–1979), 931B (1979–1988), 931C II (1989–1992), 935B (1987–1988), 935C II (1987–1994), and 951 Trax Cavator (1985–1993). Use the selection widget to match your exact model and year, or search by OE number. Every fitment shown is backed by our Fit Guarantee.
A. It is a 12V, 40A alternator of Denso IR/EF design, with clockwise rotation and a groove pulley. The IR/EF configuration means the voltage regulator is built into the unit — no external regulator is required. The unit is supplied brand new.
A. IR/EF stands for Internal Regulator / End Frame. It means the voltage regulator is integrated inside the alternator body rather than mounted separately on the machine. This matches the original Denso design and means the unit is a direct, self-contained replacement.
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.
A. Yes — ask Simon, or WhatsApp our team on 07754 288583 with any questions about specifications, suitability, or compatibility.
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