I have the exact same mixer and it has been quite an asset to my arsenal of equipment. I'd be glad to share my experiences. I have comfortably mixed a 94lb bag of Portland in a 1:2:4 mix (1 part Portland, 2 parts sand, 4 parts aggregate) with no problems except that if the tractor is pointed uphill you just cant tilt the mixing tub high enough to keep it (the mix) from spitting back at you. The 1:2:4 mix is roughly 4.5 cubic feet (1/6 yard) of concrete. The specs say that the tub capacity is close to 12 cubic feet. Well, maybe if it was standing on end with the port hole looking at the sky. I wouldn't want to put any more material in there than previously stated. Also, the auxillary hydraulic control used to dump the tub, at least on my tractor, isn't exactly the most graceful of instruments as I really have to feather it to keep the tub from tilting too far/too quick when attempting to dump a load. You have to be careful not to get the universal joints of the PTO shaft at too extreme of an angle or everything gets into a pretty wicked shimmy. They warn you about this but it seems that I'm always pushing the tilt angle to the edge in order to get a complete dump. This may be different on your tractor depending on the mounting angle of the mixer vs your PTO shaft position. I also had to remove the draw bar from the tractor to keep it from interfering with the mounting of the mixer.
I've tried various sequences for loading the materials into the tub. I've found it best to load about 2/3's of the sand, the Portland, the remaining sand, then all the aggregate... all this while slowly spinning the tub. This helps to keep down the dust and to get a complete and thorough mix. After all the ingredients have been thoroughly incorporated, I introduce the water. It takes roughly a 5 gallon bucket of water for a good mix; +/- a couple of quarts depending on the dampness of the sand and aggregate and your mix ratio.
Despite the little mechanical issues, I am extrememly pleased with the mixer and it has literally paid for itself in just a few mixing sessions. I have a New Holland TC33D (33hp) and it handles the equipment just fine.
Last edited by SecretSquirrel; 07-08-2007 at 08:35 AM.