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F-16 F-16
RANGER 8
ROTOR VOLTAGE TEST (continued)
FIGURE F.1 - LOCATION OF LEAD 200A AND 219 FOR ROTOR VOLTAGE TEST
Slip Rings
Brushes
Lead 219
+
-
Lead 200A
TROUBLESHOOTING & REPAIR
TEST PROCEDURE
1. With the 5/16” nut driver, remove the 6
sheet metal screws from the case top.
2. Remove the rubber gasket (cover seal)
from the lift bail.
3. Remove the fuel cap. The rubber gasket
for the fill tube will come off with the case
top.
4. Remove the case top, then reinstall the
fuel cap.
5. With the 5/16” nut driver, remove the 5
screws holding the right case side.
6. Remove the right case side by lifting up
and out.
7. Set the volt/ohmmeter to the DC volts
position.
8. Connect the positive meter probe to the
brush nearest the rotor lamination (lead
200A). See Figure F.1 for location.
9. Connect the negative meter probe to the
other brush (lead 219).
10. Start the engine and run it at high idle
(3650 RPM). Set the output control to the
MAXIMUM position (position 10).]
11. Check the voltage reading on the volt-
meter. It should read between 37 and 46
VDC.
12. If the voltage reading is low or not pre-
sent, the generator field is not functioning
properly. Perform the Rotor Resistance
Test. The Field Diode Bridge (D2), the
Field Capacitor (C1), and/or the Printed
Circuit Board may be faulty.
13. If the voltage reading is normal, the field
circuit is functioning properly. Install the
right case side with the 5 sheet metal
screws with the 5/16” nut driver. Remove
the fuel cap; install the case top and tight-
en the 6 sheet metal screws with the
5/16” nut driver. Install the rubber gasket
over the lift bail and install the fuel cap.