Aircraft Alternator
Maintenance Manual
ES1031
24-30-01
Rev. B: 20 Apr. 2022
Page: 6-3
© 2022 - Hartzell Engine Technologies - All rights reserved
6.4 Alternator Drive Coupling Inspection & Maintenance (cont’d)
B.
To remove the gear driven alternator from a specific engine, refer to the aircraft and/or engine
service and maintenance manuals for detailed instructions.
C. General Removal - Gear Driven Alternator
(1) Make sure external power has been disconnected. Unless otherwise advised, gain access
and disconnect the ground (-) cable from the battery post. Isolate and secure the ground (-)
terminal.
(2) Disconnect the cable from the positive (+) battery post and isolate the terminal.
(3) Disconnect the Field wires, AUX wire, output and ground cables from the alternator.
(4) Remove the retaining hardware for the alternator and brackets as required. Remove the old
engine case gasket and discard. Remove the alternator from the aircraft/engine.
(5) If drive coupling is to be removed, cut and remove the cotter pin and use a 5/16 inch hex
key to hold the rotor shaft with a 15/16 inch socket or wrench to remove the output shaft nut.
(6) Remove the drive coupling from the output shaft if required.
Figure 6.1 - Typical Gear Drive Coupling Arrangement (ALV-9610).
Output Shaft
Mounting
Hardware
(OEM)
Drive Coupling
Gasket (OEM)
Nut & Cotter Pin
(Output Shaft)
Woodruff
Key Slot
Spacer & O-Ring
