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Oshkosh Corporation JLG M400A - User Manual

Oshkosh Corporation JLG M400A
118 pages
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ANSI
®
Operation and Safety Manual
Original Instructions - Keep this manual with the machine at all times.
Boom Lift Models
E400A
E400A Narrow
E400AJP
E400AJP Narrow
M400A
M400A Narrow
M400AJP
M400AJP Narrow
3121215
January 7, 2013

Table of Contents

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Questions and Answers

  • A
    Anthony RamirezAug 14, 2025
    What to do if my Oshkosh Corporation JLG M400A shows high engine temp?
    • K
      Kenneth BernardAug 14, 2025
      If your Oshkosh Corporation Boom Lifts engine temperature is high, check for any obstructions that might be blocking the cooling airflow to the engine. Also, make sure the ambient temperature is within the engine's design limits. Finally, verify that the engine temperature sensor is working correctly.
  • C
    Carlos SmithAug 18, 2025
    What to do if Oshkosh Corporation Boom Lifts unit is off or disabled and the engine will not crank?
    • G
      Gabriella AlvarezAug 18, 2025
      If your Oshkosh Corporation Boom Lifts unit is off or disabled and the engine won't crank, check the position of the selector switch and ensure the inhibit run is released. Check the warning LED and address any faults before restarting the RBS. Verify the start battery voltage, check the control fuse, and inspect for loose wiring or connections.
  • D
    Diana HarrisAug 20, 2025
    What to do if my Oshkosh Corporation Boom Lifts is overcranking?
    • S
      Scott SteeleAug 21, 2025
      If your Oshkosh Corporation Boom Lifts is overcranking, start by checking the fuel level and connections. Then, verify the operation of the fuel solenoid and fuel pump. Also, check the start battery voltage. If you see white smoke from the engine exhaust, it means fuel is entering the engine but it's not firing. If the ambient temperature is low, make sure the heater or glow plug is working.
  • K
    kristine37Aug 25, 2025
    Why does my Oshkosh Corporation Boom Lifts have low oil pressure?
    • K
      Kimberly TaylorAug 25, 2025
      If your Oshkosh Corporation Boom Lifts has low oil pressure, first check the oil level and the oil supply lines. Verify the correct operation of oil pressure switch with a test gauge.
  • L
    Lisa LongAug 27, 2025
    What causes underspeed in Oshkosh Corporation JLG M400A?
    • M
      Martin WhiteAug 27, 2025
      If your Oshkosh Corporation Boom Lifts is experiencing underspeed, ensure the engine has an adequate supply of fuel and combustion air. Check the air cleaner. Also, verify the setting of the governor lever and readjust it if needed.
  • J
    Juan SantosAug 31, 2025
    What causes overspeed in Oshkosh Corporation Boom Lifts?
    • M
      Michael PerryAug 31, 2025
      If your Oshkosh Corporation Boom Lifts is experiencing overspeed, verify the setting of the governor lever and readjust it if required.
  • M
    Mrs. Kimberly Avila DVMSep 3, 2025
    How to troubleshoot engine starting system fault in Oshkosh Corporation Boom Lifts?
    • E
      Erica EvansSep 3, 2025
      To troubleshoot an engine starting system fault in your Oshkosh Corporation Boom Lifts, check the engine start battery charging system for current output and inspect for a failed engine start battery.
  • W
    William CunninghamSep 6, 2025
    What to do if my Oshkosh Corporation Boom Lifts shows overvoltage?
    • B
      Benjamin BenderSep 7, 2025
      If your Oshkosh Corporation Boom Lifts is showing overvoltage, check the alternator output voltage.
  • D
    davidcarpenterSep 10, 2025
    What to do if my Oshkosh Corporation JLG M400A has no speed signal?
    • C
      Cindy ComptonSep 10, 2025
      If your Oshkosh Corporation Boom Lifts has no speed signal, check the wiring connections.

Oshkosh Corporation JLG M400A Specifications

General IconGeneral
BrandOshkosh Corporation
ModelJLG M400A
CategoryBoom Lifts
LanguageEnglish

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