LOL, We've got a new HM235 sitting in the shed now, I had it on the tractor long enough to move it inside...hasn't even cut a blade of grass yet....so I've had lots of time to read the manual, so I can be a paper expert until the real world use comes...
Appears you need to spend several hours setting the thing up to work on the specific tractor correctly, 20" end link height/support chain, check chain limits, cutting height chain etc, to set the cutter bar float set correctly (bar dragging on the ground hard can cause breakaway)
Sounds like you aren't operating at PTO RPM either, i.e. not giving the disks a chance to cut, versus snagging the crop. Book says 6 MPH ideal cutting speed. Not sure on the 1000 RPM...the HM's are only 540!
The HM series came out only a few years back, ours is stamped "made in Italy" The Heavy Duty (615/616/617 etc have been in production a lot longer. We don't have a big enough tractor for an HD machine, so the HM fit the HP and price requirements.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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