Plane-Power ES-10024B-1 User manual

Aircraft Alternator
Maintenance Manual
ES1031 24-30-01
Rev. B: 20 Apr. 2022 Page: i
© 2022 - Hartzell Engine Technologies - All rights reserved
AIRCRAFT ALTERNATOR
MAINTENANCE MANUAL
P/N ES1031
ALTERNATOR
MODELS
ES-10024B-1 ES-14024B-1
ES-10024B-2 ES-14024B-2
ES-10024B-3 ES-14024B-3
ES-10024B-4 ES-14024B-4
ES-10024B-5 ES-14024B-5
ES-10024B-5LS ES-14024B-1LS
ES-10024 ES-6024D
ALV-9610

Aircraft Alternator
Maintenance Manual
24-30-01 ES1031
Page: ii Rev. B: 20 Apr. 2022
© 2022 - Hartzell Engine Technologies - All rights reserved
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Aircraft Alternator
Maintenance Manual
ES1031 24-30-01
Rev. B: 20 Apr. 2022 Page: iii
© 2022 - Hartzell Engine Technologies - All rights reserved
AIRWORTHINESS LIMITATIONS........................................................................................................ A-1
A.1 General Information........................................................................................................................... A-1
A.2 Airworthiness Limitations Statement ................................................................................................. A-1
A.3 Life Limits .......................................................................................................................................... A-2
CHAPTER 1 -INTRODUCTION .......................................................................................................... 1-1
1.1 General Information............................................................................................................................1-1
1.2 General Specification (manual) ..........................................................................................................1-2
1.3 How to use the manual ......................................................................................................................1-2
1.4 Measurements....................................................................................................................................1-3
1.5 Units of Measure ................................................................................................................................1-3
1.6 Abbreviations......................................................................................................................................1-4
1.7 Definitions...........................................................................................................................................1-4
1.8 Disposal..............................................................................................................................................1-6
1.9 Model Identification.............................................................................................................................1-6
1.10 Serial number Identification................................................................................................................1-6
1.11 Warranties ..........................................................................................................................................1-6
CHAPTER 2 -DESCRIPTION OF OPERATION ................................................................................... 2-1
2.1 Description..........................................................................................................................................2-1
A. General.........................................................................................................................................2-1
B. Operational Data ..........................................................................................................................2-2
C. Dimensions...................................................................................................................................2-2
2.2 Basic Component Description ...........................................................................................................2-15
2.3 Technical Purpose.............................................................................................................................2-15
2.4 Physical Detail...................................................................................................................................2-16
2.5 Theory of Operation ..........................................................................................................................2-17
2.6 Self Excitation Description.................................................................................................................2-17
2.7 Operational Data ...............................................................................................................................2-18
CHAPTER 3 - TROUBLESHOOTING...................................................................................................... 3-1
3.1 General...............................................................................................................................................3-1
3.2 Procedure ...........................................................................................................................................3-1
3.3 Alternator Drive Coupling Troubleshooting ........................................................................................3-8
3.4 Alternator Belt Troubleshooting..........................................................................................................3-8
TABLE OF CONTENTS

Aircraft Alternator
Maintenance Manual
24-30-01 ES1031
Page: iv Rev. B: 20 Apr. 2022
© 2022 - 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 ..............................................................................................................................5-5
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..........................................................................................................6-8
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

Aircraft Alternator
Maintenance Manual
ES1031 24-30-01
Rev. B: 20 Apr. 2022 Page: v
© 2022 - Hartzell Engine Technologies - All rights reserved
6.11 Materials ............................................................................................................................................6-12
6.12 Applying Safety Wire .........................................................................................................................6-14
6.13 Applying Safety Cable .......................................................................................................................6-14
6.14 Installation on the Aircraft (Gear Drive).............................................................................................6-14
6.15 Installation on the Aircraft (Belt Drive)...............................................................................................6-14
6.16 Special Conditions:............................................................................................................................6-15
A. Sudden Engine Stoppage (gear drive):.......................................................................................6-15
B. Sudden Engine Stoppage (belt drive) .........................................................................................6-15
C. Lightning Strike............................................................................................................................6-16
6.17 Storage and Shelf Life :......................................................................................................................6-17
A. Storage........................................................................................................................................6-17
B. Shelf Life .....................................................................................................................................6-17
REFERENCES
A. PP2002 - AIRCRAFT ALTERNATOR OVERHAUL MANUAL, ALTERNATOR MODELS: ES-10024 &
ALV-9610

Aircraft Alternator
Maintenance Manual
24-30-01 ES1031
Page: vi Rev. B: 20 Apr. 2022
© 2022 - Hartzell Engine Technologies - All rights reserved
Thank you for purchasing a PlanePower* alternator. We encourage you to read this manual
thoroughly. It contains a wealth of information about how to properly install and maintain your
alternator so that it may give you many years of safe and reliable service.
Should you have a question regarding your alternator that is not covered in the manual,
Hartzell Engine Technologies Product Support is ready to assist you. We may be reached at
the following contact information:
Phone: [phone], option 2
E-mail: [email protected]
Fax: [phone]
Web: www.Hartzell.aero/contact/
*PlanePower is a trademark of Hartzell Engine Technologies LLC
WARNING:
People who fly should recognize that there are various types of risks are involved
in this activity; and they should take all precautions to minimize them, since they
cannot be eliminated entirely. The alternator is an important component of the
aircraft. An alternator failure could result in an unplanned landing or even more
severe consequences creating an unsafe condition that may result in death, serious
bodily injury, and/or substantial property damage. It is, therefore, essential that the
alternator is properly maintained according to the recommended service procedures
and monitored to detect impending problems before they become serious. Any
unusual operation should be investigated and corrected, as it may be a warning of
impending failure.

Aircraft Alternator
Maintenance Manual
ES1031 24-30-01
Rev. B: 20 Apr. 2022 Page: vii
© 2022 - Hartzell Engine Technologies - All rights reserved
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Aircraft Alternator
Maintenance Manual
24-30-01 ES1031
Page: viii Rev. B: 20 Apr. 2022
© 2022 - Hartzell Engine Technologies - All rights reserved
RECORD OF REVISIONS
Revision
Level
Issue
Date
Page(s)
Revised Description
New 5/05/16 N/A New Release
A 8/11/21 All Approved via PCO-110543;
Formated to comply with FAA Order 8100.54, Appdx A;
Replace Hartzell Engine Technologies logo with PlanePower logo;
i Change “Owner’s” to “Maintenance”;
󰀨
ii Update copyright date;
iii Update Table of Contents;
v Add References section;
vi Add “*PlanePower is a trademark of Hartzell Engine Technologies LLC”;
1-2 Add para.1.2 H. Changes and Updates;
Change ES-10024B-( ) to ES-10024B-1 thru -5 and 5LS;
1-3 

1-6 Para. 1.9, change ES-10024B-( ) to ES-10024B-1 thru -5 and 5LS;
2-2 Update Operational Data and Dimensions paragraphs;
2-3 Update dimensions illustration, Figure 2.3;
2-4 thru 2-7 Add basic dimension illustrations for ES10024B-1, -2, -3, -4, -5, -5LS model
alternators;
2-8 Add basic dimension illustration for 6024D alternator;
2-11 Update Figure 2.12 to show alternator exploded view, typical;
2-12 Table 2.1, change temerature ranges to N/A;
Change Minimum regulation speed from 2,200 RPM to 1,800 RPM;
Filter Type: Change 50 µF to .50 µF;
Field Resistance: Change 6.3-6.7 ohm to 14.9-15.4 ohm;
Change * 50 µF to .47 µF;
3-8 Para. 3.3 B.(3), add “and correct the issue”;
5-4 & 5-5 Update para. 5.4, Alternator Bench Testing;
5-8 thru 5-11 Add test illustrations 5-1 thru 5-5;
6-2 Update torque value, Table 6-1, Figure 6.1 (gear), “Output Shaft Nut”, from 37-
42 ft-lbs to 25.0-37.5 ft-lbs;
6-5 Table 6.2, remove alternator ES10024B-7 not covered under scope of manual;
6-12 Para. 6.11, Materials, update various part numbers;
6.13 Para. 6.15, add sub-paragraph A.

Aircraft Alternator
Maintenance Manual
ES1031 24-30-01
Rev. B: 20 Apr. 2022 Page: ix
© 2022 - Hartzell Engine Technologies - All rights reserved
Date
Removed
Issue
Date
RECORD OF REVISIONS
Revision
Level
Issue
Date
Page(s)
Revised Description
B 4/20/22 All Revision accepted via PCO-111097;
i Add alternator models ES-14024B-1 thru -5, & -1LS;
ii Remove Copyright boilerplate;
1-2 Add ES-14024B-1 thru -5, -1LS to para. 1.2 B.;
1-6 Add ES-14024B-1 thru -5 to para. 1.9;
2-2 Add ES-14024B Operational Data;
2-9 thru 2-14 Add ES-14024B-1 thru 14024B-5 illustrations;
2-18 
5-4 Para. 5.G. (4) a. Update to include 14024B-1, -2 & -5;
Add para. 5.G (4) b.;
5-5 Add ES-14024B, para. 5.D (1);
5-6 Add Table 5.4 - ES-14024B Test Parameters;
5-11 Add ES14024B to description of Figure 5.5;
6-2 Add ES-14024B-1LS to 6.4 Header;
6-5 Add ES14024B-1 thru -5, & -1LS to Table 6.2;
6-12 Add Reference to Table 6.3;
6-13 Add Table 6.4 - List of Materials;

Aircraft Alternator
Maintenance Manual
24-30-01 ES1031
Page: x Rev. B: 20 Apr. 2022
© 2022 - Hartzell Engine Technologies - All rights reserved
RECORD OF TEMPORARY REVISIONS
Temporary
Rev. Letter
Page
Number
Date
Removed
Issue
Date By By

Aircraft Alternator
Maintenance Manual
ES1031 24-30-01
Rev. B: 20 Apr. 2022 Page: A-1
© 2022 - Hartzell Engine Technologies - All rights reserved
Revision Number Description of Revision
Airworthiness Limitation Revisions Log
AIRWORTHINESS LIMITATIONS
A.1 General Information
CAUTION:
THE AIRWORTHINESS LIMITATIONS HEREIN ARE THOSE MANDATED BY
HARTZELL ENGINE TECHNOLOGIES. THESE LIMITATIONS ARE THE MINIMUM
REQUIRED TO MEET CONTINUED AIRWORTHINESS BUT MAY BE SUPERSEDED
BY MORE STRINGENT REQUIREMENTS AS PUBLISHED BY THE FAA, AIRCRAFT,
ROTORCRAFT OR OTHER MANUFACTURERS THAT USE THESE COMPONENTS
IN THEIR APPLICATIONS. FAILURE TO OBSERVE THESE LIMITATIONS MAY
COMPROMISE THE COMPONENT OR THE APPLICATION IT IS USED IN.
A.2 Airworthiness Limitations Statement
A. 
§ 43.16 and § 91.403 of the Federal Aviation Regulations unless an alternative program has been
FAA approved.
AIRWORTHINESS
LIMITATIONS

Aircraft Alternator
Maintenance Manual
24-30-01 ES1031
Page: A-2 Rev. B: 20 Apr. 2022
© 2022 - Hartzell Engine Technologies - All rights reserved
A.3 Life Limits
A. 

or hours of use.
B. Additions of, or changes to, any life limit for alternator components will be noted in the Airworthiness
Limitation Revision Log.
C. Life Limits
(1) Alternator models and their component parts affected by this manual currently do not have
any life limited parts.
(2) There are no new (or additional) Airworthiness Limitation associated with this equipment.

CHAPTER 1 -INTRODUCTION
1.1 General Information
WARNING:
IMPROPER OR UNAUTHORIZED APPLICATIONS OF THE INFORMATION
CONTAINED IN THE MANUAL MAY RENDER THE AIRCRAFT OR THE
COMPONENT UNAIRWORTHY AND RESULT IN LOSSES, DAMAGES,
OR INJURY TO THE USER.
DO NOT USE OBSOLETE OR OUTDATED INFORMATION. PERFORM
ALL INSPECTIONS OR WORK IN ACCORDANCE WITH THE MOST
RECENT REVISION OF THE APPLICABLE AIRCRAFT/ENGINE SERVICE
OR MAINTENANCE MANUAL. INFORMATION CONTAINED IN THESE
MANUALS MAY BE SIGNIFICANTLY CHANGED FROM EARLIER
REVISIONS. USE OF OBSOLETE INFORMATION MAY CREATE AN
UNSAFE CONDITION THAT MAY RESULT IN DEATH, SERIOUS BODILY
INJURY, AND/OR SUBSTANTIAL PROPERTY DAMAGE.

not manufactured by Hartzell Engine Technologies LLC (HET). Any use of the manual for other than its
intended or implied purpose is prohibited. The use of the manual for the purpose of performing any
installation, maintenance, replacement, adjustment, or inspection of any assembly, component or part not
manufactured by HET is not approved, endorsed, or sanctioned by HET.
This manual has been approved by Hartzell Engine Technologies LLC as the proper methods and

should use in the inspection and maintenance of Hartzell Engine Technologies LLC alternators.
No liability will be assumed by Hartzell Engine Technologies LLC for actual, consequential, incidental or
other types of damages directly or indirectly resulting from the unauthorized use of this manual for other
than its stated purposes.
The liability for use of the authorized data herein for the maintenance, or return to service is limited to
󰀨
part, component, assembly or whole unit sold by HET.

Approvals (PMA), or Form 337 Field Approvals that may apply, it is the responsibility of the repairman,
mechanic or maintenance facility to determine the proper engine or aircraft application of this alternator

(STC), aircraft equipment list, maintenance manuals, and/or Log Book entries for determination.
When performing installation, maintenance, replacement, adjustment, or inspection of any HET assembly,
component or part, it is imperative that the latest revision of this HET manual or other product support
document be referenced. Reference the HET website to be sure you have the latest revision before
performing any work. (http://www.hartzell.aero/maintenance-manuals/)
All reasonable attempts were made to make this manual as complete and accurate as possible. If you

please write to Hartzell Engine Technologies LLC, 2900 Selma Highway, Montgomery, Alabama, 36108
USA. TEL [phone], FAX [phone], or http://hartzell.aero/contact/.
Aircraft Alternator
Maintenance Manual
ES1031 24-30-01
Rev. B: 20 Apr. 2022 Page: 1-1
© 2022 - Hartzell Engine Technologies - All rights reserved

1.2 General Specification (manual)
A. 
measure used in the manual are U.S. units with International System of Units (SI) in parentheses.
B. The ALV-9610, ES-10024, ES-10024B-1 thru -5, -5LS, ES-14024B-1 thru -5, -1LS, and ES-6024D series (24v)
alternator models are considered herein.
C. All aircraft, rotorcraft, or engine applications are limited to the holder of the TC, STC, PMA or TSO and only at
the date of that document publication or revision.
D. Only approved, competent persons with the necessary skills may do maintenance tasks described in the

paragraph C with guidance from AC 43.12A of latest change.
E. The manual describes maintenance on components as they are installed on aircraft and tasks that should be
accomplished in a properly equipped service facility.
F. 
G. The manual contains: Description and operation, Troubleshooting, Instruction for Continued Airworthiness
(ICA) and Maintenance information along with part numbers required for basic maintenance tasks.
H. Changes and updates to this manual can be found at www.PlanePower.aero. Revisions will be tracked and
recorded in the Record of Revisions section of this document.
1.3 How to use the manual
A. Make sure the manual contains information applicable to your aircraft, engine, or replacement alternator. Look
for the model number on the Title Page and if applicable, the part number of the replacement or superseded
component.
B. It is imperative that you read, understand, and observe all the applicable WARNINGS and CAUTIONS before
you do any work on this component.
C. Use only the sections needed, use the check section to determine what actions may be needed periodically
and the maintenance sections for servicing the alternator.
D. 
engine service or maintenance manual.
E. Refer to the troubleshooting section to assure that the observed or reported condition lies with the alternator.
F. Fully test the alternator per the instructions in this manual when running the aircraft. Utilize the aircraft and/or
engine manufacturer’s service manuals and publications before returning the aircraft to service. Use the AFM
or POH for aircraft operations.
G. Some sections in this manual apply to all alternators considered herein. Other sections will contain information

Aircraft Alternator
Maintenance Manual
24-30-01 ES1031
Page: 1-2 Rev. B: 20 Apr. 2022
© 2022 - Hartzell Engine Technologies - All rights reserved

1.4 Measurements
The measurements given in this manual are taken from original manufacturing drawings.
1.5 Units of Measure
A. SI Units
A Ampere
 
g Gram
N Newton
 
V Volt
°C Degree Celsius
 
W Watt
Hz Hertz
m Meter
cm Centimeter
kg Kilogram
B. U.S. Units
ft Foot
in Inch
lb Pound
lbf Pound-force
 
 
0F Degree Fahrenheit
C. 
 
m Milli
k Kilo
M Mega
p Pico
Aircraft Alternator
Maintenance Manual
ES1031 24-30-01
Rev. B: 20 Apr. 2022 Page: 1-3
© 2022 - Hartzell Engine Technologies - All rights reserved

1.6 Abbreviations
A. The abbreviations given below are used in the manual: (upper or lower case)
ACU Alternator Control Unit
AFM Aircraft Flight Manual
ALT Alternator
ATA Air Transport Association of America
CMI Continental Motors, Inc.
DE Drive End (housing)
DIA Diameter
FAA Federal Aviation Administration (USA)
FIG. Figure
GAMA General Aviation Manufacturers Association
IPC Illustrated Parts Catalog
ID Inside Diameter
HET Hartzell Engine Technologies LLC
MAX Maximum
MFR Manufacturer
MIN Minimum
NO. Number
N/A Not Applicable
OD Outside Diameter
PCB Printed Circuit Board
P/N Part Number
PARA. Paragraph
POH Pilots Operating Handbook
REF. Refer To
S/A Subassembly
S/N Serial Number
SRE Slip Ring End (housing)
 
TOL Tolerance
1.7 Definitions
A. WARNINGS place critical attention
to use of tools, materials, procedures, or limitations, which must be followed without deviation to avoid injury to
the technician or other persons. CAUTIONS place immediate attention to use of tools and procedures which
must be followed to avoid injury, damage to equipment and/or facilities. Notes call attention to procedures
which make the job easier.
B. 
ALTERNATOR: The complete unit which transforms rotational energy from a powerplant
into electrical energy . At a given voltage, produces alternating current (AC) which is
converted to direct current (DC).
ALTERNATOR CONTROL UNIT:󰀨

AMMETER: The device for measuring current in amperes.
BRUSH: Device for conducting current to the slip rings of the rotor. It is a composite carbon block which
includes a spring, lead and contact.
Aircraft Alternator
Maintenance Manual
24-30-01 ES1031
Page: 1-4 Rev. B: 20 Apr. 2022
© 2022 - Hartzell Engine Technologies - All rights reserved

BRUSH HOLDER: Device that retains multiple brush assemblies and is comprised of a holder, contacts, and
terminals.
CONTINUITY:
COOLING COVER: Device attached to the alternator to provide cooling air from an external source. May be
provided with alternator or required by the airframe manufacturer. (Also known as the “Blast Tube”, referring to
ram air cooling source.)
EMI: Electro Magnetic Interference. A disturbance in the radio-frequency spectrum that is generated by an
󰀨
conduction.
FRONT HOUSING: Part of the external housing which contains the components of the alternator. This end
has structure typically used for mounting. It may also be referred to as the Drive End Housing or D.E.
INSULATOR:

atom.
MULTIMETER: Device for the measurement of voltage, current, or resistance.
LEAKAGE: Dissipation of voltage or current from a component or connection.
OPEN:
resistance.
PEAK INVERSE VOLTAGE: (PIV) The maximum rated value of a AC voltage acting in the direction opposite
to that in which a device is designed to pass current.
PHASE:
degrees of phase. Phase can also be an expression of relative displacement between or among waves having
the same frequency. In our case the alternator is three phase or 120 degrees separation.
POLARIZE: To induce polarization i.e., the partial or complete polar separation of positive and negative elec-
tric charge in an electrical system.
REAR HOUSING: Part of the external housing which contains the components of the alternator. It may also
be referred to as the Slip Ring End or S.R.E.
RECTIFIER:

RFI: Radio Frequency Interference. Electromagnetic energy in the radio-frequency spectrum. Electrical inter-

is a normal by-product of electrical generators.
ROTOR:
contact surface for the brush assemblies. The slip rings are smooth surface copper “rings” pressed onto the
rotor shaft.
SHORT: Common term for a connection which has no or very little resistance as seen on an Ohmmeter in an
electrical circuit. Typically an undesirable condition with respect to grounded elements.
STATOR: A stationary set of conductors wound in coils on an iron core.
TEST BENCH: Device so constructed as to allow testing of the alternator or component parts.
TERMINALS: Studs, screws or other devices that provide connections for electrical power.
THROUGH BOLT: Special bolts which connect front and rear alternator housings.
Aircraft Alternator
Maintenance Manual
ES1031 24-30-01
Rev. B: 20 Apr. 2022 Page: 1-5
© 2022 - Hartzell Engine Technologies - All rights reserved

VOLT/OHM METER: Device for the measurement of voltage or resistance.
WOODRUFF KEY: Device used to capture the pulley or other drive device and aid in coupling torque from the
powerplant source to the alternator’s rotating shaft. Normally half moon in shape.
1.8 Disposal
A. The alternator assembly is designed to allow for re-use of many alternator subassemblies and components.
Disposal of unairworthy parts and assemblies as well as required replacement parts should be as follows:
Rejected parts should be tagged and scrapped per FAA requirements. Any part deemed unairworthy must be

should be discarded whole through your local hazardous waste management system.
1.9 Model Identification
ALV-9610 Gear Driven (24 Volt)
ES-10024 Gear Driven (24 Volt)
ES-10024B-1 thru -5 and -5LS Belt Driven (24 Volt)
ES-14024B-1 thru -5 and -1LS Belt Driven (24 Volt)
ES-6024D Gear Driven (24 Volt)
1.10 Serial number Identification
HET H- K 05 001
Year Code
Month Code
Batch Code

order for each succeeding year.
1.11 Warranties
A. 󰀨
assembly or component (parts) it sells through it’s distribution system. NO expressed or implied warranty exists
when repairing, overhauling, or rebuilding any assembly or component using this manual except as it may apply
to any new HET replacement part purchased. If you suspect that any warranty applies to the Alternator assembly,

󰀨
the HET warranty department. (Warranty shall be denied for any alternator received altered, modified, or
disassembled.)
B. 󰀨

and conditions should a warranty condition occur. If needed for reference, obtain the most current policy from the
authorized HET distributor nearest you -or- visit our website at www.hartzell.aero.
Aircraft Alternator
Maintenance Manual
24-30-01 ES1031
Page: 1-6 Rev. B: 20 Apr. 2022
© 2022 - Hartzell Engine Technologies - All rights reserved

CHAPTER 2 -DESCRIPTION OF OPERATION
2.1 Description
A. General
(1) Hartzell Engine Technologies (HET) small frame, gear and belt driven alternators have been designed
and constructed to provide extended periods of trouble-free operation with a minimum amount
of maintenance. They are intended to withstand the vibration and extreme temperature changes
encountered in aircraft applications. Basic features are identified in Fig. 2.1 thru 2.20 below.
1. Through-Bolts (4 ea.) 5. Aux Terminal
2. Field Terminal 6. Output Terminal (+)
3. Ground Terminal (-) 7. Flexible Cooling Duct (ALV-9610 only)
4. Brush Assembly
Figure 2.1 Typical Front View Figure 2.2 Typical Rear View
1
2
3
4
5
6
7
Aircraft Alternator
Maintenance Manual
ES1031 24-30-01
Rev. B: 20 Apr. 2022 Page: 2-1
© 2022 - Hartzell Engine Technologies - All rights reserved

B. Operational Data
Gear Driven (ES-10024, ALV-9610, ES-6024D) -
Air Cooled -
Operating Speed (Minimum for Regulation): 2,200 RPM
Maximum Continuous Operating Speed: 10,000 RPM
Operating Output (Rated): 28.0 volts, 100 amps
Maximum Operating Altitude: 31,900 feet MSL (9,723 meters MSL)
Weight: See Table 2-1, this chapter
Belt Driven (ES-10024B) -
External Fan Cooling -
Operating Speed (Minimum for Regulation): 2,200 RPM
Maximum Continuous Operating Speed: 10,000 RPM
Operating Output (Rated): 28.0 volts, 100 amps
Maximum Operating Altitude: 31,900 feet MSL (9,723 meters MSL)
Weight: See Table 2-1, this chapter
Belt Driven (ES-14024B) -
External Fan Cooling -
Operating Speed (Minimum for Regulation): 2,400 RPM
Maximum Continuous Operating Speed: 10,000 RPM
Operating Output (Rated): 28.0 volts, 100 amps
Maximum Operating Altitude: 31,900 feet MSL (9,723 meters MSL)
Weight: See Table 2-1, this chapter
C. Dimensions
(1) The basic dimensions of each alternator are shown in Fig. 2.3 thru 2.20.
(2) The dimensions of the ALV-9610 alternator are the same for the ES-10024 alternator with the exception
of the flex cooling duct.
Aircraft Alternator
Maintenance Manual
24-30-01 ES1031
Page: 2-2 Rev. B: 20 Apr. 2022
© 2022 - Hartzell Engine Technologies - All rights reserved