How to Troubleshoot a Lincoln Floor Jack
The low profile of Lincoln floor jacks make them perfect for the amateur DIY as well the professional mechanic. Over time, however, you may need to troubleshoot various problems with the Lincoln jack. While these are high quality jacks, they can (and do) eventually wear out. Before replacing them, make sure that the problem is not fixable.
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Instructions
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Check the wheel housing for debris and tighten the wheels. Clear away debris from the wheel well if the jack does not roll smoothly. You may also need to tighten the wheels using the nut in the center of the wheel. Turn the nut clockwise with a socket wrench to tighten the wheels. The jack should roll smoothly.
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Check the tension spring on the jack. The tension spring provides tension to the jack handle. If you do not feel resistance in the handle while raising the jack handle, then your tension spring may be broken. You'll need to order a new spring for your model of Lincoln jack. The spring is located under the jack arm (the jack must be raised for you to see it).
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Check the jack oil level. As the jack gets older, air may get into the hydraulic system on the jack, forcing oil out of the system. You may not notice any oil leaking out of the oil plug because it typically happens very slowly. If your jack feels "spongy" or you have a hard time lifting your vehicle with the jack, there could be a low oil level or air in the system. Open the plug on the top of the jack base. Make sure the jack is lowered all the way to the ground. Fill the jack with motor oil and replace the plug.
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