I have a year 2008 Jinma 284. Got it direct from china in a crate and did the finnal assmbly myself.
It took me 10&1/2 hrs to put it together. And then I had to run it in.
By run it in I mean start it and run for 5 minites, check for leaks and the opperation of f&r, 2wd/4wd, High and low, hydrolics and steering. Then drain everything! The engine oil, & the oil in the injector pump empty it and replace with diesel, drain the engine block and install a block heater then replace the water with 50/50 water and glycol. Drain the hydrolics and replace with diesel drain the PS and fill with diesel, now drain the rear end and front end and replace with diesel. Now start the tractor and for 5 minites use all 2wd & 4wd, Hi & low all gears f & r, cycle the hydrolics.
And now turn off the machine and drain all of that diesel from your PS, hydrolics, rear end, front end, engine and injector pump, replace the oil & hydrolic filters (it came with spares) and refill the engine and injector pump with the proper engine oil for your area, fill the front and rear end with good quality gear oil, and the PS and hydrolics with the proper hydrolic fluid for your area.
And after that before you get to 50 hours check the valve lash and torque your head bolts.
I have done that and the only complaint that I have is that in cold mornings it refuses to start without pre heating the engine(block heater).
And now if I have scared you with the assembly and run in you are not ready to get a "crate tractor". Unless if you have a trusted local mechanic that you can have the crate delivered to and pay him to assemble and ruin it in for you. Total hours should be about 15 to assemble and run it in.
Am I happy with my 284, you bet :thumbsup:. I use it for bringing in the fire wood. Mowing the fields (5' bush hog type mower) and in heavey snow and ice storms plowing the driveway (6' rear blade)