3408C & 3412C INDUSTRIAL ENGINES Caterpillar


Alternators And Regulators

Usage:

3E7892 Alternator (12V 85A)

NOTE: Load battery with a carbon pile (4C4911 Battery Load Tester) to get maximum alternator output.

Polarity ... Negative Ground

Rotation ... Either Direction

Speed for testing (rpm) ... 5000

Output voltage ... 14.0 ± 0.5V

Output (hot) ... 77A

(1) Shaft nut torque ... 102 ± 7 N·m (75 ± 5 lb ft)

(2) Torque for negative terminal screw ... 6.2 ± 0.6 N·m (55 ± 5 lb in)

(3) Torque for positive terminal nut ... 13.5 ± 1.3 N·m (119 ± 12 lb in)

Regulator.

Voltage setting ... No Adjustment

Permissible voltage range ... 13.5 to 14.5V

3T6352 Alternator (24V 35A)


Side View


Rear View

NOTE: Load battery with a carbon pile (4C4911 Battery Load Tester) to get maximum alternator output.

Polarity ... Negative Ground

Rotation ... Either Direction

Speed for testing (rpm) ... 5000

Output voltage ... 28 ± 1V

Output (hot) ... 35A

(1) Shaft nut torque ... 102 ± 7 N·m (75 ± 5 lb ft)

(2) Torque for positive terminal nut ... 6.2 ± 0.6 N·m (55 ± 5 lb in)

(3) Torque for ground terminal nut ... 2.25 ± 0.25 N·m (20 ± 2 lb in)

(4) Regulator.

Voltage setting ... No Adjustment

Permissible voltage range ... 27 to 29V

6T1395 Alternator (24V 35A)

NOTE: Load battery with a carbon pile (4C4911 Battery Load Tester) to get maximum alternator output.

Polarity ... Negative Ground

Rotation ... Either Direction

Speed for testing (rpm) ... 5000

Output voltage ... 28 ± 1V

Output (hot) ... 27.9A

(1) Shaft nut torque ... 60 ± 7 N·m (44 ± 5 lb ft)

(2) Torque for three small terminal nuts ... 2.25 ± 0.25 N·m (20 ± 2 lb in)

(3) Torque for large terminal nut ... 6.2 ± 0.6 N·m (55 ± 5 lb in)

(4) Regulator.

Voltage setting ... No Adjustment

Permissible voltage range ... 27 to 29V

7N9720 Alternator (24V 35A)


Side View


Rear View

NOTE: Load battery with a carbon pile (4C4911 Battery Load Tester) to get maximum alternator output.

Polarity ... Negative Ground

Rotation ... Clockwise (as viewed from pulley)

Speed for testing (rpm) ... 5000

Output voltage ... 27.5 ± 1.0V

Output (hot) ... 35A

(1) Shaft nut torque ... 102 ± 7 N·m (75 ± 5 lb ft)

(2) Regulator.

Voltage setting ... No Adjustment

Permissible voltage range ... 26.5 to 28.5V

(3) Torque for positive terminal nut ... 13.5 ± 1.3 N·m (119 ± 12 lb in)

(4) Torque for ground terminal nut ... 2.1 to 2.8 N·m (19 to 25 lb in)

9G4574 Alternator (24V 35A); 5N5692 Alternator (24V 60A)


Side View


Rear View

9G4574

NOTE: Load battery with a carbon pile (4C4911 Battery Load Tester) to get maximum alternator output.

Polarity ... Negative Ground

Rotation ... Either Direction

Speed for testing (rpm) ... 5000

Output voltage ... 28 ± 1V

Output (hot) ... 35.6A

(1) Shaft nut torque ... 102 ± 7 N·m (75 ± 5 lb ft)

(2) Torque for positive terminal nut ... 13.5 ± 1.3 N·m (119 ± 12 lb in)

(3) Torque for ground terminal nut ... 4.4 ± 1.0 N·m (40 ± 8 lb in)

(4) Regulator.

Voltage setting ... No Adjustment

Permissible voltage range ... 27 to 29V

5N5692

NOTE: Load battery with a carbon pile (4C4911 Battery Load Tester) to get maximum alternator output.

Polarity ... Negative Ground

Rotation ... Either Direction

Speed for testing (rpm) ... 5000

Output voltage ... 28 ± 1V

Output (hot) ... 42.3A

(1) Shaft nut torque ... 102 ± 7 N·m (75 ± 5 lb ft)

(2) Torque for positive terminal nut ... 6.2 ± 0.6 N·m (55 ± 5 lb in)

(3) Torque for ground terminal nut ... 2.25 ± 0.25 N·m (20 ± 2 lb in)

(4) Regulator.

Voltage setting ... No Adjustment

Permissible voltage range ... 27 to 29V

4N3986 Alternator (24V 60A)


Side View


Rear View

NOTE: Load battery with a carbon pile (4C4911 Battery Load Tester) to get maximum alternator output.

Polarity ... Negative Ground

Rotation ... Either Direction

Speed for testing (rpm) ... 5000

Output voltage ... 27.5 ± 1.0V

Output (hot) ... 54A

(1) Shaft nut torque ... 102 ± 7 N·m (75 ± 5 lb ft)

(2) Torque for terminal nuts ... 7.1 ± 0.8 N·m (60 ± 7 lb in)

(3) Regulator.

Voltage setting ... No Adjustment

Permissible voltage range ... 26.5 to 28.5V

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