I am glad to see I am not the only one with a new Jinma. I have had mine for about a month and I can tell you a few things that I have learned about my 284.
Over all I have been very very happy with our tractor, it is amazing but I can be grouchy and tired after a long day at the office, but 5 minutes after I start my tractor all of the stress melts a away. Things that I did with our new tractor were as follows.
#1 The one piece instrument cluster had a leak in the face glass. My solution was to remove the cluster and disassemble. You have to very carefully bend the bottom of the black frame out and the glass and bezel come off of the front of the cluster. Let dry over night, judicial use of WD 40 on the moving meter parts (remember very very little amount of WD 40 on these parts) is next. WD 40 is not a great lubricant but is excellent at water displacement and preventing corrosion on sensitive parts. Thin coats of silicone on the very edge of the glass on both sides is next and reassemble. When done the cluster is water and Diesel resistant. This is very important as the filler cap for the tractor is above the Gauge cluster and you will spill Diesel on the Gauges it is just a matter of when.
#2 While the Gauges are out unplug the electrical connections and lightly pack them with water proof electrical grease. If you do not think that this is necessary just look at many of the newer vehicles, most of them now do this on their connectors. This was standard practice for telephone gear in Oregon for decades because of the huge amount of rainfall. I have never seen a connector go bad when properly packed with grease. The electrical system on Jinma’s are not badly constructed, they just need some help for a long life. Do not forget to coat the “Bolts” on the gauge assembly Amp meter with this grease also. You will be very glad you did.
#3 Check your bolts and connectors for tightness, found two on ours that were not even finger tight.
#4 New oils and fluids, I found out that the stuff in the tractor when you receive it is JUNK. Toss it out and put new in the tractor.
#5 Creeper box make sure that it is getting lubrication.
All of the Best
Scott.