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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: 6638N
The WAI 6638N is a brand-new 24V Delco DD starter motor. It is cross-referenced to replace Remy, Caterpillar, and Prestolite Electric original-equipment numbers — making it a direct-fit solution for operators sourcing a proven replacement for heavy-duty plant machinery. It is confirmed to fit the Atlas Copco ROC D7-RRC (2002–2006).
Built to the Delco DD design, the 6638N delivers clockwise rotation with a 12-tooth pinion, matching the geometry and engagement of the original unit exactly. Being brand new, it carries none of the wear concerns associated with remanufactured alternatives, giving confidence for applications where reliable cold-start performance is critical.
Cross-references span 14 OE and aftermarket references including Remy 10461204, Remy 10478948, Remy 10479011, Caterpillar 10R0405, Caterpillar 2071541, Caterpillar 2071551, Caterpillar 6V5821, Caterpillar 9X4507, Prestolite Electric MS1410A, Prestolite MS1-410A, and further Remy and CAT numbers — covering the most widely searched references for this application.
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| Type | Starter Motor |
|---|---|
| Manufacturer | Delco |
| Design | DD |
| Voltage | 24V |
| Rotation | CW |
| Teeth | 12 |
| 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...
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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. Yes. The WAI 6638N is cross-referenced to replace five Remy part numbers including Remy 10461204, Remy 10478948, and Remy 10479011, along with Remy 1993980 and Remy 8200957 — 14 OE and aftermarket references in total. Use our cross-referenced catalogue or ask Simon to confirm your specific Remy number is covered.
A. Yes. The 6638N is cross-referenced against five Caterpillar references: Caterpillar 10R0405, Caterpillar 2071541, Caterpillar 2071551, Caterpillar 6V5821, and Caterpillar 9X4507, plus two CAT-format numbers (CAT 207-1541 and CAT 207-1551). If you are replacing a Caterpillar original, search the catalogue by your OE number or ask Simon to verify the match.
A. This starter motor is confirmed to fit the Atlas Copco ROC D7-RRC (2002–2006) — one application on record. To verify fit for your specific unit or serial number, use the selection widget or search by OE number. Every fitment shown is backed by our Fit Guarantee.
A. Yes. The 6638N is cross-referenced to two Prestolite Electric numbers: Prestolite Electric MS1410A and Prestolite MS1-410A. Search our catalogue by either reference to confirm the fit, or ask Simon if you need further guidance.
A. The WAI 6638N is a 24V unit built to the Delco DD design, with clockwise (CW) rotation and a 12-tooth pinion. It is supplied brand new. The full specification table is shown in the product listing.
A. It is brand new. The WAI 6638N is not a remanufactured or reconditioned unit — it is supplied as new old stock or new production, as confirmed in the product specification.
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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