Component Testing and Adjustment 7-15TP-5648 8/93
Stator
Thestator consists ofa series ofcoilsof wire placed ina
laminated steel frame. The stator leads supply voltage
to the AC load and exciter regulator.
Prior to testing, inspect the stator for heat discoloration
and visible damage to housing lead wires, exposed coil
windings, and exposed and varnished areas of frame
laminations. Be sure the stator is securely riveted in the
stator housing.
Checking Stator Continuity
and Resistance
1. To check stator continuity, set ohmmeter on R x 1
scale. Contact the red and black meter leads;
adjust ohmmeter to zero ohms. Check stator
continuity by connecting meter leads to stator
leads.
NOTE
Disconnect all stator leads prior to performing
stator continuity tests.
Leads1,2,3,and4arethegenerator output leads.
Leads 55 and 56 are the voltage regulator power
supply. Leads B1 and B2 are the generator output
interlock circuit for the controller. Refer to the
schematic in Figure 7-11 when performing the
following tests.
D There must be continuity between leads 1 and 2.
D There must be continuity between leads 3 and 4.
D Theremustbecontinuitybetweenleads55and66.
D There must be continuity between leads B1 and
B2.
D There must be NO continuity between lead 1 and
leads 3, 4, 55, 66, B1, or B2.
D There must be NO continuity between lead 4 and
leads B1, B2, 55, or 56.
D There must be NO continuity between any stator
lead and ground on stator housing or frame
laminations.
Stator
55 66 3 4
B1 B2 1 2
Stator
Rotor
Main Field
Figure 7-11. Stator Resistance Check
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