JLG Lull 1044C-54 II Series User Manual (English)

Questions and Answers:

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Leslie BarkerAug 3, 2025
Why is my JLG Lull 1044C-54 II Boom Lifts pump so noisy?
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  David ChapmanAug 4, 2025
  Excessive pump noise in JLG Boom Lifts can stem from several causes. It could be due to a low oil level in the hydraulic reservoir, in which case you should fill the reservoir to the proper level with the recommended hydraulic fluid, being careful not to overfill. Another cause might be air in the system; operate the hydraulic system until it's purged and check inlet lines and fittings for leaks. A vacuum condition could also be the culprit, so inspect inlet lines and the reservoir breather filter for restrictions. If the oil is too thick, ensure the correct type is used, with the proper viscosity for ambient temperatures. Lastly, cold weather can cause noise; run the hydraulic system until the unit warms up, and check the oil viscosity.
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Karen JuarezAug 10, 2025
What to do if JLG Lull 1044C-54 II Boom Lifts pump is overheating?
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  Adrian Brock MDAug 11, 2025
  If the pump in your JLG Boom Lifts is overheating, it could be due to internal leakage or a low fluid level. Add oil to the operating level to address a low fluid level. For internal leakage, it is recommended to return the vehicle to a maintenance shop for evaluation and repair.
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Heidi ClarkAug 18, 2025
What causes loss of fluid in JLG Lull 1044C-54 II?
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  woodcarolAug 18, 2025
  Loss of fluid in JLG Boom Lifts can be attributed to several factors: * Ruptured hydraulic lines. * Loose fittings. * Leaking gaskets or seals in the pump or circuit. Check all external connections, tubing, and hoses. Tighten connections and replace any ruptured tubes or hoses. Also, observe the mating sections of the pump for leaks and replace seals or gaskets if possible.
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xlangAug 27, 2025
How to fix a JLG Boom Lifts system that is not developing pressure?
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  Mark BryantAug 27, 2025
  If your JLG Boom Lifts system is not developing pressure, it may be due to a relief valve being open or a loss of fluid internally (slippage). Replace or repair the relief valve if it is open. If there is loss of fluid internally, return the vehicle to the maintenance shop for repair of the hydraulic system.