How To Bleed or Air Purge a Trolley Jack
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Why You Need to Air Purge Your Trolley Jack
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Even though a trolley jack is a closed system that relies on hydraulic pressure to generate lift, air can still become trapped in the hydraulic system and affect performance.
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If your trolley jack is not lifting, not fully lifting or feels "spongy" then there may be trapped air in the system. There is however a very simple procedure to follow to purge any air from the jack and keep your jack working correctly.
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