Hello,
I am a moderator on a forum for people that heat with wood. As part of heating with wood, we also discuss products that deal with turning trees into firewood, including log splitters.
One of our users reported a problem with a Harbor Freight Tools brand 30-ton log splitter. As I personally own the same or a similar model, I am naturally concerned about the risks of having a similar problem occurring to my machine. My machine is a model 91840, however Harbor Freight has sold similar looking machines under many different model numbers, so I don't know what the model number of the other person's machine is.
The user reported that his machine purchased in 1996 or 1997 developed a serious fluid leak in the hydraulic cylinder, so he disassembled the cylinder to determine the cause and attempt repairs. He found that there was a nut which attached the piston to the piston rod which was extremely loose. It appears to me that if the nut had come off completely, the piston rod would have been forcefully and rapidly ejected from the cylinder in an unpredictable manner, with severe possibility of injury.
This failure appears very similar to the one described in your Release #09-174 issued on April 1, 2009 involving certain Brave and Iron Oak splitters. As that recall mentioned at least one hand amputation, it seems to me that this is a subject of possibly severe concern.
Preventing this kind of failure at the time of manufacturing would be very easy to do in my opinion, as all that would be needed is to install a cotter pin or other method to keep the nut from coming off. It would be harder for a consumer to do because of the tools needed. In addition, because the parts involved are inside the hydraulic cylinder, which is normally only dismantled by professional techs when overhauling it, there is no way for a consumer to check whether the nut is tight or not.
I have called Harbor Freight's customer service and technical support departments and they were not able to tell me if there had been any changes to the way the cylinder was built that would prevent failures between the time the other user's machine had been built, and when I purchased mine in the summer of 1998.
If you would like more details, you can see them in the forum thread, at the website address
https://www.hearth.com/talk/threads/23743/
The problem discussion starts on page 6 of the thread. ( I am known as "Gooserider" on that forum)
I looked at filling out the form on the CPSC website, and it seemed like there were a lot of the details I couldn't provide, so I am hoping this report will serve as a starter to alert you to the potential problem - if you need further information you will probably need to contact the user involved directly.