The scraper should not be a problem. If you look at the specs page in your owner's manual, you will see the lift capacity with the center of gravity right at the 3ph to be something around 1200 lbs. and the capacity for an implement whose CG is 2' behind the 3ph to be around 700 lb. The 375 lb. max is only stated for implements which are used while the tractor is in motion. Someone who abuses the tractor and races perpendicularly across furrows with a 400 lb. implement might put enough downward g-force on the 3ph to damage it. The lawyers likely make them put the 375 lb. limit in for liability purposes, i.e. someone who abuses the tractor then files warranty claim. Use of >375# in abusive situation will prevent them from having to honor the warranty, and rightly so IMHO. You'll notice that for attachments used while stationary (generator,
chipper, log splitter, PHD, etc.), there are no given weight limits; either the 3ph will lift it or it won't. As long as you use this scraper in normal fashion, it will not be a problem, though you may want to put some counterweight on the front end.
What you do need to be concerned about is the fact that the hp rating for that PHD of yours is not the hp of your engine, but the amount of hp available at your PTO, which is only around 17 hp. The PHD is larger than necessary for your tractor. It may well turn the auger and work in soft soil with a large auger, and a small auger in tough soil, but most likely, you will not get anywhere near the potential from this PHD that it is designed to deliver. As Homebrew says, it may work fine, the thing is, you could have gotten the same amount of work out of a lighter model, whereas a big tractor could get much more work out of this unit than your BX can. This dealer may have sold you a model that is larger than necessary for your tractor, just so he could clear more profit on a bigger ticket item. ALWAYS spec. implements on the PTO hp, not the engine hp.
