1 / 9
7847
DELCOAlternatorIR/EF12V100ACW Rotation
4 interchanges26 components
Or call (405) 225-7220 · M–F 8–5 CT
Note:This is a Delco 27SI Alternator Which is Specially Designed With All Ground Points Going Through a Stud in the Rear Housing. For Military GMC/Chevy SUV/Pickup Truck Applications
Specifications
Full technical detail
- Type
- Alternator
- Manufacturer
- DELCO
- Design
- IR/EF
- Voltage
- 12V
- Amperage
- 100A
- Rotation
- CW
- MFR Series
- 27SI/100
- Pulley Design
- V1
- Pulley Groove OD
- 78
- Plug Code
- 151
- Plug Clock
- 12:00
OEM part numbers
Genuine OEM & engine-manufacturer numbers this alternator replaces
Vehicle applications
Fitment lookup
We’re still building the full vehicle-fitment list for this part. Tell us your year, make, model and engine and a Charging Systems rep will confirm the exact fit — usually the same business day.
Or call (405) 225-7220 · M–F 8–5 CT
Component breakdown
Replacement parts that go inside this unit
| Component | Part numbers |
|---|---|
| Bearing, Ball | 5-4000 |
| Bearing, Needle Roller | 4-2405 |
| Brush Holder Assy, Alt | 7440-4605 |
| Brush Set | 7340-210B |
| Bushing, Mounting, Alt | 9740-4109 |
| Capacitor | 8640-416 |
| Connector, Alt | 9940-4601 |
| Diode Trio | 7740-102 |
| Frame, DE, Alt | 7640-4112 |
| Nut | 9500-1115 9500-1116 9500-1300 |
| Pin, Alt | 6840-020 |
| Plug Code | 9801-151 |
| Rectifier | 7740-1116 |
| Regulator, Alt | 8040-6240 |
| Resistor | 8640-409 |
| Retainer, Bearing, Alt | 8540-4001 |
| Rotor | 7040-1537 |
| Screw | 9640-4009 9640-4012 9640-4046 9640-4010 |
| Seal, Alt | 9140-4701 |
| Spacer, Alt | 9740-4076 |
| Spring, Brush, Alt | 9440-4900 |
| Stator | 7240-6148 |
| Terminal Kit, Relay, Alt | 9640-4621A |
| Test Lead, Alt | 9800-C |
| Thru Bolt | 9640-4105 |
| Washer, Lock | 9740-4000 |