Aircraft Alternator
Maintenance Manual
24-30-01 ES1031
Page: iv Rev. A: 11 Aug. 2021
© 2021 - Hartzell Engine Technologies - All rights reserved
CHAPTER 4 - CHECK .................................................................................................................................4-1
4.1 General ...............................................................................................................................................4-1
4.2 Inspection Checks ..............................................................................................................................4-1
CHAPTER 5 - INSPECTION & TESTING ..............................................................................................5-1
5.1 General ...............................................................................................................................................5-1
A. Equipment ....................................................................................................................................5-1
B. Precautions ..................................................................................................................................5-2
5.2 Inspection ...........................................................................................................................................5-2
A. Arc Marks on Terminals (Visual Inspection): ...............................................................................5-2
B. Bearing Inspection (For Troubleshooting Purposes): ..................................................................5-2
C. Field Circuit Open or Ground Test Procedure: ............................................................................5-3
D. Mounting Hardware: .....................................................................................................................5-3
E. Insulators (Washers and Spacers): ..............................................................................................5-3
F. Brush holder, Brushes and Springs: ............................................................................................5-3
G. Pulley Run Out Check: .................................................................................................................5-4
5.3 Alternator Bench Testing ....................................................................................................................5-4
A. Alternator Output Test Conditions ................................................................................................5-4
B. Ventilation .....................................................................................................................................5-4
C. Order of Tests ..............................................................................................................................5-4
D. Test Setup ....................................................................................................................................5-5
5.4 Alternator Self Excitation Test (-5 & -5LS only) .................................................................................5-7
CHAPTER 6 - MAINTENANCE ..................................................................................................................6-1
6.1 General ...............................................................................................................................................6-1
6.2 Bi-Annual Maintenance ......................................................................................................................6-1
6.3 Torque Information .............................................................................................................................6-2
6.4 Alternator Drive Coupling Inspection & Maintenance .......................................................................6-2
6.5 Alternator Belt & Pulley Inspection & Maintenance ............................................................................6-4
6.6 Removal from the Aircraft (Belt Drive) ...............................................................................................6-5
6.7 Exterior Cleaning (direct drive or belt drive) .......................................................................................6-7
6.8 Brush Removal
and Installation..........................................................................................................6-7
A. Removal: ......................................................................................................................................6-8
B. Installation: .................................................................................................................................6-8
6.9 Through Bolts .........................................................................................................................................6-8
6.10 Terminal Hardware Removal and Installation ...................................................................................6-10
A. Removal ......................................................................................................................................6-10
B. Installation ...................................................................................................................................6-10
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