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| Illustration 1 | g00620646 |
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Front View of the 26-SI Alternator |
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| Illustration 2 | g00620650 |
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Side View of the 26-SI Alternator |
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| Illustration 3 | g00620651 |
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Rear View of the 26-SI Alternator |
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| Specifications for 26-SI Alternators | ||||
|---|---|---|---|---|
| Part Number Remanufactured Part Number |
3E-7577 OR-3615 |
3E-7578 OR-5206 |
112-5041 OR-5206 |
3E-7892 OR-3616 |
| Voltage Rating | 24V | 24V | 24V | 12V |
| Current | 75A | 50A | 50A | 85A |
| Application | Extra Heavy Duty | Extra Heavy Duty | Heavy Duty | Extra Heavy Duty |
| Weight | 12.5 kg (27.6 lb) | 12.5 kg (27.6 lb) | 12.5 kg (27.6 lb) | 12.5 kg (27.6 lb) |
| Polarity | Negative Case Ground | Negative Case Ground | Negative Case Ground | Negative Case Ground |
| Minimum Full Load Current (Cold) at 5000 rpm | 67A | 47A | 47A | 77A |
| Minimum Full Load Current (Cold) at 1500 rpm | 29A (1) (2) | 18A | 18A | 38A |
| Amperes at 27 °C (80 °F)and 1800 rpm |
45 | 33 | 33 | 56 |
| Amperes at 27 °C (80 °F) and 5000 rpm |
75 | 50 | 50 | 85 |
| Rotation (3) | CW CCW |
CW CCW |
CW CCW |
CW CCW |
| ( 1 ) | Minimum Full Load Current (Cold) at 2000 rpm |
| ( 2 ) | The minimum speed of the alternator should be 1800 rpm at low engine idle. |
| ( 3 ) | The rotation is viewed from the pulley. |
The results for a 12 volt 26-SI Alternator’s rotor field winding test at 27 °C (80 °F) are in the following list:
- 3.0 to 4.3 Amperes
- 2.8 to 4.0 Ohms
The results for a 24 volt 26-SI Alternator’s rotor field winding test at 27 °C (80 °F) are in the following list:
- 2.0 to 2.8 Amperes
- 8.5 to 12.0 Ohms
| Torque Specifications for the 26-SI Alternator | ||||
|---|---|---|---|---|
| Part Number Remanufactured Part Number |
3E-7577 OR-3615 |
3E-7578 OR-5206 |
112-5041 OR-5206 |
3E-7892 OR-3616 |
| Pulley Nut | 102 ± 7 N·m (75 ± 5 lb ft) | 102 ± 7 N·m (75 ± 5 lb ft) | 102 ± 7 N·m (75 ± 5 lb ft) | 102 ± 7 N·m (75 ± 5 lb ft) |
| Cover for the Rectifier | 5.3 N·m (47 lb in) | 5.3 N·m (47 lb in) | 5.3 N·m (47 lb in) | 5.3 N·m (47 lb in) |
| Cover Plate Regulator and Mounting Plate Heat Sink |
3 N·m (27 lb in) | 3 N·m (27 lb in) | 3 N·m (27 lb in) | 3 N·m (27 lb in) |
| Battery Terminal | 13.5 ± 1.3 N·m (119.5 ± 11.5 lb in) | 13.5 ± 1.3 N·m (119.5 ± 11.5 lb in) | 13.5 ± 1.3 N·m (119.5 ± 11.5 lb in) | 13.5 ± 1.3 N·m (119.5 ± 11.5 lb in) |
| “R” Terminal Nut for the Regulator Stud |
2 N·m (18 lb in) | 2 N·m (18 lb in) | 2 N·m (18 lb in) | 2 N·m (18 lb in) |
| Nut for the Hex Mounting Bolt Bolt for the Adjusting Lug |
88 N·m (65 lb ft) | 88 N·m (65 lb ft) | 88 N·m (65 lb ft) | 88 N·m (65 lb ft) |
| Frame Bolts | 6.2 N·m (55 lb in) | 6.2 N·m (55 lb in) | 6.2 N·m (55 lb in) | 6.2 N·m (55 lb in) |
| Ground Screw | 6 N·m (55 lb in) | 6 N·m (55 lb in) | 6 N·m (55 lb in) | 6 N·m (55 lb in) |
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| Illustration 4 | g00620877 |
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26-SI Alternator Schematic |
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