What to do if JLG Boom Lifts system is overheating?
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Robert SteinJul 27, 2025
If the heat exchanger isn't receiving enough airflow or is in poor condition, it might not be able to cool the system adequately. Make sure the heat exchanger is getting enough air and is in good working order. Repair or replace it if necessary. Also, if a system relief valve becomes unseated for a long time or fails, the system could overheat. Repair or replace any faulty relief valves, and make sure the machine's loads aren't too high.
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brookeparkAug 1, 2025
How to fix overheating issues in JLG 450A?
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Joshua MartinezAug 2, 2025
If a system relief valve becomes unseated for an extended period or fails, it can cause overheating. Repair or replace any malfunctioning relief valves and verify the machine loads are not excessive. Insufficient hydraulic fluid will also prevent meeting system cooling demands, so fill the reservoir to the proper level.
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Cindy OconnellAug 6, 2025
What causes slow shifting in JLG 450A Boom Lifts?
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Rachel BullockAug 7, 2025
Check that the signal lines aren't blocked or restricted, and that there's enough signal pressure to shift the motor. Also, make sure the correct control orifices are installed in the motor and that they aren't blocked. Clean or replace them if needed, as the supply and drain orifices control how fast the motor shifts.
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cynthia77Aug 11, 2025
How to reduce excessive noise and vibration in JLG 450A Boom Lifts?
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Cole GillespieAug 11, 2025
Several factors can cause excessive noise and vibration in JLG Boom Lifts:
* Insufficient hydraulic fluid can lead to cavitation. Fill the reservoir to the correct level and ensure the oil supply to the motor is adequate and the lines are unobstructed.
* Air trapped in the system lines or motor can also cause cavitation. Make sure that the system lines and components are purged of air.
* A loose or incorrect shaft coupling will produce vibrations. Ensure the correct coupling is used and fits properly on the shaft.
* Misaligned shafts create excessive frictional vibration. Ensure that the shafts are properly aligned.
* Viscosity above acceptable limits will result in cavitation. Replace the hydraulic oil with the appropriate fluid for the operating conditions.
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Anthony CantuAug 16, 2025
Why won't my JLG 450A Boom Lifts shift or is slow to start?
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Tyler ButlerAug 16, 2025
Obstructed or restricted flow through the servo control signal lines could cause slow or no shifting. Ensure the signal lines are not obstructed or restricted and that the signal pressure is adequate to shift the motor. Also, supply and drain orifices determine motor shift rate. The smaller the orifice, the longer it takes to shift the motor, and obstructions increase shift times. Ensure proper control orifices are installed in the motor and check they are not obstructed. Clean or replace as needed.
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Laura NguyenAug 22, 2025
How to fix shaft coupling noise in JLG 450A Boom Lifts?
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Mariah Evans DDSAug 22, 2025
To address noise from JLG Boom Lifts, ensure the correct coupling is used and fits properly on the shaft. Also, verify that the shafts are properly aligned.
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