3306C DIESEL TRUCK ENGINE Caterpillar

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

Polarity ... Negative Ground

Rotation ... Either Direction

Speed for testing (rpm) ... 5000

Output voltage ... 14.0 ± 0.5V

Output (cold) ... 58A

Tighten the ground terminal nut to a torque of ... 9.0 ± 3.0 N·m (80 ± 27 lb in)

Tighten the output terminal nut to a torque of ... 3.4 ± 0.6 N·m (30 ± 5 lb in)

(1) Tighten the pulley nut to a torque of ... 100 ± 7 N·m (75 ± 5 lb ft)

(2) Brush length (new) ... 24 mm (.94 in)

(3) Slip Rings:

Maximum Runout (TIR) ... 0.05 mm (.002 in)

Minimum Diameter ... 29.3 mm (1.15 in)

9L6774 Regulator Inside Alternator

Voltage setting ... No adjustment

Permissible voltage range ... 14 ± 0.5V