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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: 3902N
The WAI 3902N is a brand-new 24-volt Delco 50MT direct-drive starter motor. It is built to replace Remy and Caterpillar original-equipment units across a range of heavy agricultural and industrial machines. It is cross-referenced against 38 OE and aftermarket references, including Remy 10455855, Remy 10461103, Remy 10479342, Caterpillar 0R2697, Caterpillar 0R4267, and Caterpillar 10R9816, making it straightforward to verify against your existing part number before ordering.
Designed to the Delco 50MT direct-drive specification, the 3902N operates at 24 volts with clockwise rotation and an 11-tooth pinion — key parameters to confirm against your machine's original starter before fitting. It covers 14 Caterpillar agricultural and industrial applications, including the 583K, 589, 591, 594H, 776B, 776C, 777B, and 777C models produced between 1981 and 2000.
Supplied brand new, this unit requires no core return and is ready to fit straight from the box.
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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 | Delco |
| Design | 50MT DD |
| Voltage | 24V |
| 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...
The best way to find the correct starter motor is to combine the machine and engine details with the OEM or original starter reference, then confirm voltage, rotation, pinion teeth, mounting and terminal position. Do not choose a replacement from appearance alone.
A starter motor usually clicks without cranking because the battery cannot deliver enough current, resistance is present in the battery cables or engine ground, or the starter control circuit and solenoid are not operating correctly. A click does not automatically mean the...
Standard Delivery: £4.99
Delivery Estimate: 1 to 2 working days
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| Technical Specification | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PRODUCT NUMBER | 3510N | 4319N | S1009 | S1165S | S1170S | S1256S | S1262S | 3510N-PG | 4162N | 4525N | 6278N | 6356N | 6360N | 6370N | 6571N |
| Voltage | 12 | 12 | 24 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 24 | 12 | 24 | 24 | 12 |
| Design | 10MT DD | DD | PG260M PMGR | 10MT DD | 10MT DD | 37MT Series | 42MT DD | 42MT DD | 42MT DD | 28MT OSGR | |||||
| Manufacturer | Delco | Delco | Delco | Delco | Delco | Delco | Delco | Delco | Delco | Delco | |||||
| Power | 1.5 | 9.0 | 0.8 | 1.8 | 2.0 | 1.8 | 1.4 | 1.4 | 7.8 | ||||||
| Rotation | CW | CW | CW | CCW | CW | CW | CW | CW | CW | CW | CW | CW | CW | CW | CW |
| Teeth | 9 | 10 | 11 | 8 | 9 | 11 | 11 | 11 | 9 | 10 | 10 | 11 | 12 | 11 | 12 |
A. The WAI 3902N is cross-referenced against 38 OE and aftermarket references. The highest-demand replacements are Remy units including Remy 10455855, Remy 10461103, and Remy 10479342, along with Caterpillar references including Caterpillar 0R2697, Caterpillar 0R4267, and Caterpillar 10R9816. Prestolite references include Prestolite Electric MS7300A and Prestolite MS7-300A, and AC Delco 323790 and CAT 338-3456 are also listed. Search our cross-referenced catalogue by your existing OE number to confirm, or ask Simon if your number is not shown. Every OE cross-reference is backed by our Fit Guarantee.
A. The 3902N covers 14 Caterpillar agricultural and industrial applications. These include the Caterpillar 583K (1983–1989), 589 (1983–1992), 591 (1983–1992), 594H (1981–1985), 776B (1986–1992), 776C (1992–1997), 777B (1986–1992), and 777C (1992–2000). Use the selection widget to match your exact machine and engine variant, or search by model to confirm fitment. Our Fit Guarantee covers every application listed.
A. The WAI 3902N is a 24-volt direct-drive starter motor built to the Delco 50MT DD design. It runs clockwise rotation and carries an 11-tooth pinion. It is supplied brand new — no core return is required.
A. Yes — the Caterpillar 777C (1992–2000) is one of the 14 Caterpillar agricultural and industrial applications covered by the WAI 3902N. Confirm your engine variant and serial number using the selection widget, or ask Simon to verify before ordering.
A. The 3902N is built to the Delco 50MT direct-drive specification with 11 teeth and clockwise rotation, matching the original-equipment design parameters for the listed Caterpillar applications. Always verify voltage (24V), tooth count, and rotation direction against your original unit before fitting. If you are unsure, ask Simon or search by your existing OE number.
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. 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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