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WAI 7644N Alternator
| Brand | WAI 7644N |
|---|---|
| 12 | 12 |
| Fan Type | External |
| Rotation Direction | Clockwise (right) |
| Pulley Included | No |
| Family | Delco |
| Regulator Type | Internal |
| Decoupled Or Clutch Pulley | No |
| Amperage Rating | 160 |
| Fits | Ford · 29 vehicles |
100% new construction. Not remanufactured, with proprietary components and processes.
160 amp output. Built to supply the electrical demand of modern charging systems.
Internal regulation. Integrated voltage control with an external fan design.
Cross-references AP Exhaust 7672, Carlson 7644 and Carlson 7669 for the same application. See all 24.
High-output replacement alternator
This WAI alternator is built for heavy-duty charging demands and is supplied as a 160 amp unit. It is a 100% new alternator, not remanufactured, with internal regulation and an external fan for dependable electrical output.
Key features
- 160 amp amperage rating for higher electrical demand.
- 100% new construction, not remanufactured.
- Internal regulator for integrated voltage control.
- External fan design for cooling support.
- Clockwise rotation with no pulley included.
- DELCO family alternator, part number 7644N.
Detailed description
WAI 7644N is a direct-fit style alternator for Ford medium- and heavy-duty applications that use the DELCO 21SI platform. It is engineered to provide the amp output needed for modern electrical loads while using proprietary components and manufacturing processes to support long service life and consistent performance. This part number, 7644N, is listed for multiple Ford F-700, F-800, B-600, B-700, B-800, B-800F, LN7000, LN8000, P-800, L8501, and CF8000 applications with Delco 21SI notes.
What it is used for
- Charging system output that has dropped below specification.
- Battery warning lights related to alternator performance.
- Electrical accessory load that exceeds a lower-output unit.
- Replacement for a worn or failed DELCO 21SI alternator.
Installation notes and tips
Verify the existing unit’s rotation, regulator type, amperage, and pulley configuration before ordering. This alternator is clockwise rotation, uses an internal regulator, and is listed without a pulley. Confirm the vehicle’s charging system requirements and match the application notes for the correct Ford medium-duty fitment. Part number 7644N should be checked against the original unit and connector style during replacement.
Quality assurance
WAI states that this alternator is 100% new and manufactured with proprietary components and processes to support maximum life and performance. Part number 7644N is built for charging-system service in demanding commercial applications.
| Year | Make | Model | Liters | Cylinders | Notes |
|---|---|---|---|---|---|
| 1999 | Ford | F-800 | — | — | Delco 21SI 145 to 160 Amp, longer SRE bearing, Supplied as 160 Amp |
| 1998 | Ford | B-800 | 5.9L | L6 | Delco 21SI IR/EF 12V 145 to 160 Amp CW WO/ Pulley, Supplied as 160 Amp |
| 1998 | Ford | B-800F | — | — | Delco 21SI IR/EF 12V 145 to 160 Amp CW WO/ Pulley, Supplied as 160 Amp |
| 1998 | Ford | F-800 | 5.9L | L6 | Delco 21SI 145 to 160 Amp, longer SRE bearing, Supplied as 160 Amp |
| 1998 | Ford | L8501 | 5.9L | L6 | Delco 21SI IR/EF 12V 145 to 160 Amp CW WO/ Pulley, Supplied as 160 Amp |
| 1997 | Ford | B-800 | 5.9L | L6 | Delco 21SI IR/EF 12V 145 to 160 Amp CW WO/ Pulley, Supplied as 160 Amp |
| 1997 | Ford | B-800F | — | — | Delco 21SI IR/EF 12V 145 to 160 Amp CW WO/ Pulley, Supplied as 160 Amp |
| 1997 | Ford | CF8000 | 5.9L | L6 | Delco 21SI IR/EF 12V 145 to 160 Amp CW WO/ Pulley, Supplied as 160 Amp |
| 1997 | Ford | F-700 | 5.9L | L6 | Delco 21SI 145 to 160 Amp, longer SRE bearing, Supplied as 160 Amp |
| 1997 | Ford | F-800 | 5.9L | L6 | Delco 21SI 145 to 160 Amp, longer SRE bearing, Supplied as 160 Amp |
| 1997 | Ford | L8501 | 5.9L | L6 | Delco 21SI IR/EF 12V 145 to 160 Amp CW WO/ Pulley, Supplied as 160 Amp |
| 1997 | Ford | LN7000 | — | — | Delco 21SI, 145 to 160 Amp, Supplied as 160 Amp |
| 1997 | Ford | LN8000 | — | — | Delco 21SI, 145 to 160 Amp, Supplied as 160 Amp |
| 1996 | Ford | B-800 | 5.9L | L6 | Delco 21SI IR/EF 12V 145 to 160 Amp CW WO/ Pulley, Supplied as 160 Amp |
| 1996 | Ford | B-800F | — | — | Delco 21SI IR/EF 12V 145 to 160 Amp CW WO/ Pulley, Supplied as 160 Amp |
| 1996 | Ford | LN7000 | — | — | Delco 21SI, 145 to 160 Amp, Supplied as 160 Amp |
| 1996 | Ford | LN8000 | — | — | Delco 21SI, 145 to 160 Amp, Supplied as 160 Amp |
| 1996 | Ford | P-800 | — | — | Delco 21SI IR/EF 12V 145 to 160 Amp CW WO/ Pulley, Supplied as 160 Amp |
| 1995 | Ford | B-800 | 5.9L | L6 | Delco 21SI IR/EF 12V 145 to 160 Amp CW WO/ Pulley, Supplied as 160 Amp |
| 1995 | Ford | B-800F | — | — | Delco 21SI IR/EF 12V 145 to 160 Amp CW WO/ Pulley, Supplied as 160 Amp |
| 1995 | Ford | LN7000 | — | — | Delco 21SI, 145 to 160 Amp, Supplied as 160 Amp |
| 1995 | Ford | LN8000 | — | — | Delco 21SI, 145 to 160 Amp, Supplied as 160 Amp |
| 1995 | Ford | P-800 | — | — | Delco 21SI IR/EF 12V 145 to 160 Amp CW WO/ Pulley, Supplied as 160 Amp |
| 1994 | Ford | B-600 | — | — | Delco 21SI IR/EF 12V 145 to 160 Amp CW WO/ Pulley, Supplied as 160 Amp |
| 1994 | Ford | B-700 | — | — | Delco 21SI IR/EF 12V 145 to 160 Amp CW WO/ Pulley, Supplied as 160 Amp |
| 1993 | Ford | B-600 | 5.9L | L6 | Delco 21SI IR/EF 12V 145 to 160 Amp CW WO/ Pulley, Supplied as 160 Amp |
| 1993 | Ford | B-700 | 5.9L | L6 | Delco 21SI IR/EF 12V 145 to 160 Amp CW WO/ Pulley, Supplied as 160 Amp |
| 1992 | Ford | B-600 | 5.9L | L6 | Delco 21SI IR/EF 12V 145 to 160 Amp CW WO/ Pulley, Supplied as 160 Amp |
| 1992 | Ford | B-700 | 5.9L | L6 | Delco 21SI IR/EF 12V 145 to 160 Amp CW WO/ Pulley, Supplied as 160 Amp |
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