3406C Engines for Caterpillar Built Machines Alternator and Regulator Caterpillar


Alternator and Regulator
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Illustration 1g03393001

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

Table 1
Specification for 177-9953 Charging Alternator Gp 
Item  Qty  Part  Specification Description 
Tighten the bolt to 88.0 ± 13.5 N·m (64.9 ± 10.0 lb ft) before tightening the bolt (3). 
2K-4821 Locknut  Torque to 127 ± 10 N·m (94 ± 8 lb ft)
5S-7349 Bolt  (B-) terminal. Torque to 4.4 ± 1.0 N·m (38.9 ± 8.9 lb in)
185-2648 Voltage Regulator As  Voltage setting requires no adjustment.
Permissible voltage range is 27 to 29 V. 
(R) terminal is the AC tap from stator and is not to be used for diagnostics. 
6V-8189 Nut  Use a 7/16 ring terminal for (B+) terminal. 
(B+) terminal. Torque to 18.2 ± 2.4 N·m (161.1 ± 21.2 lb in).
Voltage is 24 V. 
Amperage is 80 Amp. 
Polarity is negative ground. 
Rotation is clockwise. 
Minimum full load current at 5000 rpm is 85 Amp. 
Minimum full load current at 1500 rpm is 16 Amp. 
Output voltage is 28 ± 1 V. 

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