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My old Sears hydraulic floor jack does not work.

It is a Sears floor jack with part #28-1239, and is 1 and one half ton. When the handle is pumped it barely moves and will not rise up. There are no signs of oil leakage and the oil level looks full when the red rubber plug is removed. Are there adjustments that can be made to the valves. I know it is at least 35 years old, but has not been used that much. Thank you. Dick

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2 Answers from these members:
afritz afritz
I understand that your Sears hydraulic floor jack does not work. I have taken some time to research your question here on the Manage My Life website and I noticed that someone else had asked a similar question with a posted response from an expert. I attached the link below if you are interested in viewing. I hope the link that I provided is helpful.
by afritz afritz Earned 3,303 community points in Tools
April 22nd, 2011
Answered in 9 minutes
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Manage My Life
Most of the time when a hydraulic pump stops working, it has gotten air into the system.

Try putting a small screwdriver beside the rubber plug to prop it open to vent and pump the lever 12-15 times.

Loosen the lock nut on the screw you turn to release the pressure and pump the lever 12-15 times. If nothing helps, a seal or o-ring inside the pump has probably broken. If this is the case, I recommend you buy a new jack.
by Manage My Life
April 25th, 2011
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