DRUM 5G8708 - Caterpillar

Static Flashing (Stopped Engine)
Table 1
TOOLS NEEDED    
Quantity     Description    
1     6 VDC Battery    
Stop the engine.
At some convenient point between the voltage regulator and the exciter stator, disconnect the F1 exciter wire and the F2 exciter wire.Note: The designations for the (L1) terminals will vary depending on the type of AVR. The VR6 uses "F1" and "F2" terminal labels. The R448 uses "E+" and "E-" terminal labels. The R450 has "F+" and "F-" terminal labels.Refer to Illustration 1.
Illustration 1 g02352822
Connect the positive cable of the 6 V source to wire F1. Refer to the previous note about (L1) terminal connection designations.
Momentarily put the negative cable of the 6 V source on wire F2 (two or three times).Note: Do not hold the negative cable to wire F2 for more than 1 to 2 seconds.
Connect all wires that were previously disconnected.Dynamic Flashing (Running Engine)
Refer to Systems Operation Testing and Adjusting, UENR1283, "Generator Set - Test" for more information.
Illustration 2 g00614470
Dynamic Flashing Circuit (1) Battery (greater than or equal to 6 VDC) (2) Diode (3) Red test lead "+" (4) Black test lead "-"
Table 2
TOOLS NEEDED    
Quantity     Part Number     Description    
1     237-5130     Digital Multimeter    
1     8C-5444     Diode
(MR-504)    
1         Dynamic Flashing Circuit    
Construct the dynamic flashing circuit that is shown in Illustration 2.
Stop the engine.
Connect a multimeter (set on vac) to generator power bus bars or the