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JLG 601S - Service Manual

JLG 601S
244 pages
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Service and Maintenance Manual
Model
601S
P
/N - 3120746
November 22, 2016

Table of Contents

Questions and Answers

  • Y
    Yolanda HarrisAug 3, 2025
    Why won’t my JLG 601S shift or is slow to start?
    • M
      Marisa AlvarezAug 3, 2025
      If your JLG Lifting Systems won’t shift or is slow to start, it could be due to obstructed flow through the servo control signal lines; ensure these lines are clear and signal pressure is adequate. Also, the size and condition of the supply and drain orifices affect shift rate; verify the correct orifices are installed and not obstructed, cleaning or replacing them as necessary.
  • E
    Emily HuffmanAug 12, 2025
    Why is there excessive noise and vibration in my JLG 601S Lifting Systems?
    • T
      tyler10Aug 12, 2025
      Excessive noise and vibration in JLG Lifting Systems can stem from several issues. Insufficient hydraulic fluid may cause cavitation; thus, refill the reservoir to the correct level, ensuring adequate oil supply and unobstructed lines. Trapped air can also cause cavitation, so purge all system lines and components. A loose or incorrect shaft coupling can produce vibrations; ensure the correct coupling is properly fitted. Misaligned shafts create friction, so align them correctly. Finally, overly viscous hydraulic oil can cause cavitation; replace it with fluid appropriate for operating conditions.
  • L
    lisa78Aug 23, 2025
    What to do if my JLG 601S Lifting Systems is operating hot?
    • P
      Paul WilsonAug 23, 2025
      Overheating in JLG Lifting Systems can occur if there is not enough hydraulic fluid to meet cooling demands; therefore, fill the reservoir to the correct level. A faulty or obstructed heat exchanger can also cause overheating; ensure adequate airflow and good operating condition, repairing or replacing as needed. Finally, a system relief valve that is unseated or fails can lead to overheating; repair or replace any malfunctioning relief valves and verify that machine loads are not excessive.

JLG 601S Specifications

General IconGeneral
BrandJLG
Model601S
CategoryLifting Systems
LanguageEnglish

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