10 AMP REGULATED ALTERNATOR

ALTERNATOR 10 Amp 10 AMP REGULATED ALTERNATOR The 10 amp regulated alternator incorporates a system in which the charging rate is regulated to the battery. The stator is located under the flywheel and is similar to the Dual Circuit stator and Tri-Circuit stator. Fig. 213 - 10 Amp Alternator Assembly There are two leads from the stator, similar to the dual circuit alternator, but of the same color. Fig. 213. The charge rate to the battery is 10 amps and less than 0.2 horsepower is used to operate the system. In the regulator box assembly there are diode rectifiers and S.C.R. (Silicon Controlled Rectifiers) which convert alternating current to direct current for charging the battery, and regulating the voltage. Fig. 214 - Typical Wiring Installation CHECKING ALTERNATOR OUTPUT NOTE: There will be no charging output unless a 12 volt battery with a minimum of 5 volts charge is connected to the output side of the regulator. See Fig. 214. To check the 10 amp system, first make sure the battery is at a minimum of 5 volts. With a VOA meter, check the amperage output of the regulator. Attach the meter in series (see Fig. 215) on the positive side of the charging circuit. Start the engine and run at normal operating RPM. If battery voltage is at its maximum the charging current will be less. An example would be if the battery voltage reads 14 volts, the amperage would probably read less than 3 amps. If the battery voltage reads 10 volts, the charge current will read approximately 10 amps. Fig. 215 - Checking Output of 10 Amp Regulator TESTING STATOR COILS With a multimeter, check continuity of the stator windings; this can be done by disconnecting the plug connector. See Fig. 216. Use a VOA meter set on the low ohm resistance scale. Touch one terminal with a probe and the other terminal with the remaining probe. Continuity should be present. If no continuity is present, this would indicate an open in the stator windings. Remove flywheel and repair or replace stator. To check for a grounded stator winding, repeat the above procedure, but attach one probe to ground, Fig. 217. If continuity is present, this would indicate a grounded or “shorted” stator winding. 66