PLATE AS 1322902 - Caterpillar

Illustration 1 g00292776
Typical alternator (side view)
Illustration 2 g00292777
End view of the 12 volt alternator which shows the electrical connections
Illustration 3 g00503643
End view of the 24 volt alternator which shows the electrical connections
Note: Test the battery with a carbon pile 4C-4911 Battery Load Tester in order to measure the maximum output from the alternator. The rotation of the alternator is clockwise when the alternator is viewed from the pulley.The regulator of the alternator is sealed.Polarity ... Negative ground to the caseType of brushes ... Sealed (1) Tighten the pulley nut to the following torque. ... 45 to 55 N m (33 to 40 lb ft) (2) Tighten the terminal nut "W" to the following torque. ... 2 to 2.5 N m (17 to 22 lb in)The "W" terminal is the source of the alternating current from the stator.Note: The peak voltage at the "W" terminal must not be less than the output voltage at the "B+" terminal. The peak voltage at the "W" must not be more than two volts greater than the "B+" terminal. (3) Tighten terminal nut "D+" to the following torque. ... 1.45 to 1.95 N m (13 to 17 lb in)The "D+" terminal is the field excitation terminal. The battery must be connected in order to energize the circuit. (4) Tighten terminal nut "B+" to the following torque. ... 5.9 to 9.8 N m (52 to 87 lb in) (5) Tighten terminal nut "B−" on the 24 volt alternator to the following torque: ... 3.6 0.8 N m (32 7 lb in)12 Volt Alternator at 25°C (77°F) Rpm ... 1500 to 8000 rpmPositive terminal load ... 2 amperes to maximum outputMinimum full load current at 5000 rpm ... 48.6 amperesMinimum full load current at 1500 rpm ... 20.7 amperesOutput voltage ... 14 .5 voltsRated voltage ... 12 voltsMaximum leakage current with load of 18000 ohm ... 220 microamperesLoad range ... 0 to 1 ampere24 Volt Alternator at 25°C (77°F) Rpm ... 1500 to 8000 rpmPositive terminal load ... 2 amperes to maximum outputMinimum full load current at 5000 rpm ... 47 amperesMinimum full load current at 1500 rpm ... 13.5 amperesOutput voltage ... 28 1 voltsMaximum leakage current with load of 18000 ohm ... 220 microamperesLoad range ... 0 to 1 ampereAlignment of the alternator pulley to the crankshaft pulley ... 2.4 mm (0.095 inch)