3126B Marine Engine Caterpillar


Alternator and Regulator

Usage:

3126B 3GS



Illustration 1g00508868

Note: Load the battery with a carbon pile 4C-4911 Battery Load Tester in order to get the maximum alternator output.

Polarity ... Negative Ground

Rotation ... Either Direction

Minimum full load current at 5000 rpm ... 27.9 Amp

Minimum full load current at 1500 rpm ... 10.8 Amp

Output voltage ... 28 ± 1.0 V

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

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

(3) Torque for the large terminal nut ... 4.1 ± 0.4 N·m (36 ± 4 lb in)

(4) 134-8278 Regulator Kit

Voltage setting ... No Adjustment

Permissible voltage range ... 27 to 29 V

Voltage rating ... 24 V

Caterpillar Information System:

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