Aircraft Alternator
Maintenance Manual
ES1031
24-30-01
Rev. B: 20 Apr. 2022
Page: 6-5
© 2022 - Hartzell Engine Technologies - All rights reserved
6.6 Removal from the Aircraft (Belt Drive)
A.
To remove the belt driven alternator from a specific engine, refer to the aircraft and/or engine service and
maintenance manuals for detailed instructions.
B. General Removal - Belt Driven Alternator
(1) Make sure any 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) Release the tension from the alternator belt by loosening the retaining bolts. Remove belt from the pulley.
Disconnect the retaining hardware and bracketry as required.
(5) Remove the alternator from the engine. (Some OEM applications may require the pulley to be removed
before the alternator can be removed.) Remove the alternator from the aircraft/engine.
(6) Remove the drive pulley from the output shaft if required. 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. (Early model alternators may require
a pulley wrench or similar device to hold the pulley for nut removal.)
Alternator
with Pulley
Maximum
Belt Tension
ES-10024B-2
76 lbf / 338.06 N
ES-10024B-3
80 lbf / 355.86 N
ES-10024B-4
79 lbf / 351.41 N
ES-10024B-5
80 lbf / 355.86 N
ES-14024B-1
75 lbf / 333.62 N
ES-14024B-2
75 lbf / 333.62 N
ES-14024B-3
*
ES-14024B-4
*
ES-14024B-5
78 lbf / 346.96 N
ES-14024B-1LS
*
Table 6.2 - Alternator Maximum Belt Tension
6.5 Alternator Belt & Pulley Inspection & Maintenance (cont’d)
*
Refer to applicable engine
maintenance manual for
maximum belt tension.
