Alice Halloran

How to Bleed the Air from a Floor Jack?

A good floor jack uses fluid to raise heavy objects such as vehicles. The system involves pressurized fluid that alternates between two cylinders so that the fluid volume causes the jack to rise and in turn raise the vehicle as well. With this system, you might find air trapped in the jack’s fluid reservoir. This occurs when some of the jack’s seals are not malfunctioning. Having air in the reservoir is very dangerous. One of the effects is that it could cause the jack to collapse any time, especially when it is supporting an extremely heavy load.

Symptoms of Air in Reservoir:

There are signs that point to a particular situation in all areas of life. It is the same with floor jacks. If you want to know how to tell when there is air in the reservoir, there are a few telltale signs. The first sign is that the jack automatically lowers itself slowly. You will notice this in normal operations. In this case, the height that you started with decreases with time. It could be a subtle decrease over time but you should be alert to notice even these small changes. The other sign that the jack has air is that it always has a spongy feeling when you are using it. If you happen to notice any of these signs when you are working the jack, stop using it immediately and proceed to drain the air out first.

Bleeding the Air Out:

The ram piston is a part of the jack that is found just below the object that is being lifted. The first step is to ensure that this piston has extended fully by jacking up the jack. After this, allow the jack to lower itself by releasing the pressure valve. The valve is easy to release. All you have to do is turn it half a turn in a counterclockwise direction. This can be done using a screwdriver. Once this is done, proceed to open the filler plug. If you do not know what that is, you need to consult your owner’s manual to find out what it is and where it is located. Once you have identified it, open it by also turning it half a turn in the anticlockwise direction. This is also done using a flathead screwdriver. Once you remove this plug, air that was trapped inside the jack will be released. Proof of this is when you hear a hissing sound after you remove the plug.

Setting the Jack Up:

The next step after bleeding the air out is to put the filler plug back in. proceed to repeat the same process as before. This process should then be repeated up to the point where you no longer hear a hissing sound coming from the jack once you remove the filler plug. This is an indication that all the air in the jack has escaped. Once this is done, test your jack. If everything is okay, you can now start using your floor jack again.