AirMan SDG45S-6A6 - User Manual

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INSTRUCTIONAL MANUAL

MOBILE GENERATORS

SDG25S-6A7, SDG45S-6A6,

SDG65S-6A6, SDG100S-6A6

MMD Equipment Inc.

121 High Hill Road

Swedesboro, NJ 08085

Tel: (800) 433-1382

Fax: (856) 467-5235

www.mmdequipment.com

Questions and Answers

E
Erin WeeksAug 16, 2025
What to do if AirMan Portable Generator starter rotates but engine won't start?
- D
  Denise LopezAug 16, 2025
  If the starter rotates but the engine doesn't start, several issues could be the cause. Check for a clogged fuel filter, and if so, disassemble, clean, and change it. Also, the filter of the fuel air-bleeding electric pump might be clogged and needs changing. A malfunctioning fuel shut-off solenoid could be the issue, so check the fuse. Ensure there's diesel fuel oil and replenish if needed. Finally, air might be mixing in the fuel pipings, requiring you to bleed the air.
M
Marcus OdonnellAug 22, 2025
How to fix coolant temperature rise warning lamp on AirMan SDG45S-6A6 Portable Generator?
- L
  Lori PrestonAug 22, 2025
  If the coolant temperature rise warning lamp is glowing, it could be due to several reasons. The radiator might be clogged and needs cleaning. A faulty thermostat or coolant temperature switch may need changing. Ensure there's enough coolant and replenish if there is a shortage. The fan belt may be slipping, requiring tension adjustment. Also, check for looseness or disconnection of wiring or connectors and repair them.
D
Dillon TaylorAug 28, 2025
What to do if AirMan Portable Generator generates too high voltage?
- K
  Krista BaxterAug 28, 2025
  If your generator is generating too high voltage, even when the voltage regulator knob is turned, there might be a few reasons. Check for loosened or disconnected wiring or connectors to the AVR and repair them. The AVR itself could be faulty and may need to be checked or changed. Additionally, there could be a broken wire or poor contact of the AVR variable resistor, which would require repair or replacement.
R
Robert MosleyAug 31, 2025
Why does AirMan SDG45S-6A6 Portable Generator have unstable voltage generation?
- E
  Elizabeth OliverAug 31, 2025
  Unstable voltage generation can stem from a few potential issues. Begin by inspecting all terminals for poor tightening and correct as needed. A faulty AVR could also be the culprit, necessitating a check or replacement. Lastly, verify that the function circuit protector (CP) for AVR protection hasn't been tripped, and reset if required.
D
David SaundersSep 3, 2025
What does it mean if the leakage warning lamp glows on AirMan SDG45S-6A6?
- V
  Valerie JohnsonSep 3, 2025
  If the leakage warning lamp is glowing, it indicates a leakage issue. This could be due to leakage on the generator side, the load side, or the connecting cable. Alternatively, the leakage relay may be defective. In any case, check and repair the source of the leakage.
B
Brittany RodriguezSep 6, 2025
How to troubleshoot a starter that won't rotate on AirMan SDG45S-6A6 Portable Generator?
- B
  Brittany MartinezSep 6, 2025
  If the starter does not rotate or has a low revolution speed, it may be due to a battery malfunction. Check the battery and charge or change it as needed.
D
Donald BergerSep 9, 2025
Why is the recharging warning lamp glowing on my AirMan SDG45S-6A6?
- A
  Angie JonesSep 9, 2025
  If the recharging warning lamp is glowing, it could indicate an alternator problem, which would need to be checked or changed. Alternatively, there might be looseness or disconnection of wiring or connectors, which should be checked and repaired.
W
wheelercraigSep 10, 2025
Why does the engine oil pressure drop warning lamp glow on my AirMan Portable Generator?
- B
  Brenda WilliamsSep 12, 2025
  The engine oil pressure drop warning lamp may illuminate for several reasons. The engine oil level may be low, requiring you to replenish it. The engine oil filter could be clogged and needs changing. There could be an oil pressure switch malfunction that needs checking or repairing. Also, check for loosened or disconnected wiring or connectors and repair them as necessary.
D
Derek GonzalezSep 12, 2025
What causes the air filter clogging warning lamp to flicker on AirMan Portable Generator?
- P
  Pamela CollinsSep 12, 2025
  The flickering of the air filter clogging warning lamp is caused by air filter clogging. Clean the air filter.
S
scott05Nov 24, 2025
Why is my AirMan Portable Generator generating no voltage or too low voltage?
- B
  bradleybrownNov 24, 2025
  If your generator produces no voltage or too low voltage even when operated at a rated speed, several factors could be responsible. The voltmeter may be faulty and needs checking or changing. Check for poor tightening of terminals and repair them. There might be a broken or short-circuited winding of the generator main unit, requiring inspection and repair. The AVR could be faulty and needs checking or changing. A faulty silicon rectifier or exciter may also be the cause, requiring inspection and replacement if necessary. Check for a broken or short-circuited circuit to the exciter field winding and repair it. Verify that the AVR frequency selection switch is set correctly for the operating frequency. Finally, the function circuit protector (CP) for AVR protection might be activated, requi...

Summary

Instructional Manual

Mobile Generators

Manual for mobile generator units.

Preface

Manual Overview

Introduction to the manual's purpose and content.

Safety

Caution Before Operation

Warnings and advice before operating the generator.

Caution During Operation

Guidelines and warnings for safe generator operation.

Cautions During Inspection and Maintenance

Safety measures for inspection and maintenance tasks.

Safety Warning Labels

Identification and placement of safety warning labels on the unit.

Part Names

Unit Appearance and Part Names

Visual identification of the generator's external parts.

Internal Components

Identification of key internal components within the generator.

Installation

Transporting Unit

Guidelines for safely moving and transporting the generator unit.

Place and Conditions of Unit Installation

Recommended environment and conditions for generator installation.

Selecting Cable

Guidance on choosing appropriate electrical cables for the generator.

Connecting Load

Instructions and warnings for connecting electrical loads to the generator.

Grounding Method

Proper procedures for grounding the generator for safety.

Selector Valve of Fuel Pipe

Operation and function of the fuel pipe selector valve.

Operation

Instrument Panel

Overview and function of the generator's control panel instruments.

Protection Devices

Explanation of built-in protection systems and warning indicators.

Check Before Starting the Unit

Essential checks to perform before starting the generator.

Unit Operation

Procedures for starting, operating, and warming up the generator.

Stopping Procedures

Correct steps for safely shutting down the generator.

Adjustment of Frequency

How to adjust the generator's output frequency.

Emergency Stop

Procedure for using the emergency stop button.

Air Bleeding

Steps for bleeding air from the fuel system.

Periodic Inspection and Maintenance

Important Items at Periodic Inspection and Maintenance

Key precautions and general requirements for maintenance.

Daily Inspection and Operation Log

Daily checks and importance of maintaining an operation log.

Periodic Inspection List

A comprehensive list of inspection tasks and intervals.

Periodic Replacement of Parts

Recommended parts for periodic replacement and their part numbers.

Maintenance Procedures

Detailed procedures for various maintenance tasks like oil and filter changes.

Maintenance and Adjustment

Battery Maintenance

Safety and procedures for battery maintenance and handling.

Troubleshooting

Common issues, their causes, and solutions for the generator.

Storage of the Unit

Preparation for Long-term Storage

Steps to ensure the generator remains in good condition during storage.

Specifications

Specifications

Detailed technical data including electrical and engine parameters.

Outline Drawings

Visual representation of the generator's dimensions and layout.

Wiring Diagrams

Generator Wiring Diagram

Wiring schematic for the generator's electrical system.

Engine Wiring Diagram

Wiring schematic for the engine's control and electrical systems.

AirMan SDG45S-6A6 Specifications

General

Model	SDG45S-6A6
Type	Portable Generator
Starting System	Recoil Start
Rated Watts	3600 W
Starting Watts	4500 W
Fuel Type	Gasoline
Engine Type	4-stroke OHV
Fuel Tank Capacity	4 gal

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