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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 | £4.99 | 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: 18978N
The WAI 18978N is a brand-new 12V 4.8kW starter motor. It is built to Denso OSGR specification, replacing original-equipment Denso units referenced as 228000-8470 and 2280008470, as well as John Deere references AT195414, RE502811, RE506079, and SE501872. It is designed for use across John Deere and Timberjack forestry and construction machinery, covering 20 John Deere and 4 Timberjack applications.
The OSGR (Off-Set Gear Reduction) design is a proven architecture widely used in heavy plant and agricultural equipment, delivering reliable cranking performance where a direct-drive unit would be impractical. Clockwise rotation and an 11-tooth pinion match the original Denso specification precisely, so no modifications are required during installation.
This starter motor covers a broad spread of John Deere machinery including the 360D, 460D, 540G-II, 540G-III, 548G-II, 548G-III, 560D, and 640G-II, among others spanning model years from 1997 to 2006. Timberjack applications are also covered — use the selection widget or search by OEM reference to confirm your specific machine.
About PartsForMachines:
PartsForMachines is a premier e-commerce platform, founded in 2019 in Warwickshire, UK, specializing in aftermarket parts and services for construction, agriculture, and industrial machinery. We offer an extensive catalog of over 500,000 products. Standard delivery: 1–3 working days within UK mainland. We are proud to be an authorised distributor, giving customers extra confidence when purchasing genuine products from us. In addition, we provide a 30-day return policy for eligible items.
| Type | Starter Motor |
|---|---|
| Manufacturer | Denso |
| Design | OSGR |
| Voltage | 12V |
| Power | 4.8kW |
| Rotation | CW |
| Teeth | 11 |
| Condition | Brand New |
| Engine Parts | Product Number | Product Name | Recommended Units | Product Price |
|---|
Exploring the WAI Starter Motor and Alternator at Partsformachines.com Introduction: In the Plant and Agriculture sector, a starter motor and alternator are parts that ensure a machine runs smoothly. At Partsformachines.com we have partnered with WAI, a global manufacturer of auto and plant machinery parts to off...
Standard Delivery: £4.99
Delivery Estimate: 1 to 2 working days
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| Technical Specification | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PRODUCT NUMBER | 17793N | 30236N | 30403N | 32893N | 33217N | 17737N | S6004 | S6007 | S6039 | S6045 | S6046 | S6055 | S6055PR | S6061 | S6072 |
| Voltage | 12 | 12 | 12 | 24 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
| Design | OSGR | PMGR | PMGR | OSGR | OSGR | OSGR | |||||||||
| Manufacturer | Denso | Denso | Denso | Denso | Denso | Denso | |||||||||
| Power | 1.2 | 1.5 | 1.6 | 4.5 | 2.7 | 1.2 | 2.0 | 2.2 | 1.6 | 1.0 | 1.4 | 1.8 | 1.8 | 1.3 | 1.4 |
| Rotation | CW | CCW | CW | CW | CW | CW | CW | CW | CW | CW | CW | CW | CW | CW | CW |
| Teeth | 9 | 13 | 9 | 12 | 11 | 9 | 9 | 9 | 9 | 9 | 9 | 12 | 12 | 9 | 9 |
A. This starter motor fits John Deere and Timberjack machinery — 20 John Deere applications and 4 Timberjack applications in total, including the John Deere 360D (1999–2006), 460D (2000–2006), 540G-II (1997–2006), 548G-III (1997–2006), 560D (all years), and 640G-II (1997–2006), among others. Use the selection widget to match your exact make, model, and engine, or search our cross-referenced catalogue by machine model. Every fitment shown is backed by our Fit Guarantee.
A. Yes. The WAI 18978N directly replaces Denso original-equipment references 228000-8470 and 2280008470. It also replaces John Deere references AT195414, RE502811, RE506079, and SE501872 — 6 OE cross-references in total. Search our catalogue by any of these numbers to confirm fitment, or ask Simon if you need further assistance.
A. The WAI 18978N is a brand-new 12V, 4.8kW starter motor. It uses an OSGR (Off-Set Gear Reduction) design, runs clockwise rotation, and has an 11-tooth pinion. It is manufactured to Denso specification.
A. Yes — the WAI 18978N covers 4 Timberjack applications in addition to its 20 John Deere applications. Search our cross-referenced catalogue by your Timberjack model to confirm whether your machine is listed, or ask Simon for guidance.
A. Yes — ask Simon, or WhatsApp our team on 07754 288583 with any questions about specifications, suitability, or compatibility.
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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