Jinma temperature

   / Jinma temperature #11  
TSMART said:
One thing I know about my Jinma, the "screen" is worthless. Take a flashlight and shine it THROUGH the radiator. I bet you find a bunch of microscopic crap stuck in there. If the light doesnt shine through, your radiator cant do its job right. Heck I found a bird nest behind the battery!

Here in Florida I regualrly work my Jinma when it is way hot outside.

I read posts on this forum to blow the radiator out with compressed air, I tried that, but the crap stuck in the radiator wouldnt budge. I waited till the engine cooled down, went at it with a garden hose. All the crud stuck in there sorta melted and came out right away. It did not overheat after that.

I threw my screen away. In its place now is blue fiber mesh AC filter cut to size. That cut the crap way down.

My 224 would gain heat slowly as it was worked. No more. Soon as I see the temp start to rise, even on the hottest of days,I check the radiator, which was full of crap every time.
the screen works well for me
it keeps all the big stuff off the radiator
i think they are a good screen
just like the one on the kubota at work
 
   / Jinma temperature #12  
I finally moved my battery location from in front of the radiator to the front of the tractor where weights would be placed. I have a Jinma 204 with 450 hrs. Yesterday was the first time brushhogging since the change. What a difference. Ran 5 degrees cooler the whole time. In the past the temp seemed to build like others have said and then the tractor would burp antifreeze. Yesterday nothing. Temp was steady and no burps. Ouside temps were mid 90's so it was a good test.
 
   / Jinma temperature #13  
jswisc said:
I finally moved my battery location ....
Two other things you can do to help even more: adjust the fan shroud, remote the air intake.
I've seen some Jinmas where there was a gap between the fan and the shroud. It should be adjusted to where at least the leading edges of the fan blades are INSIDE the shroud circumference. The shroud itself has some lateral adjustment, the radiator can be moved fore and aft slightly on its mounts.

Having the air filter housing up front blocks some airflow too, but more disruptive is the vacuum. It creates a turbulence in front of the radiator that can affect air flow. I bought five feet of 2" ag type suction hose (so it wouldn't collapse from suction). I cut off 3 feet and put one end over the filter housing air intake (you might have to rotate the housing on its bracket to accomplish this). Then ran the other end through a fuel tank holding strap. It then sucked in fresh air from down around my left shin. But in the winter time, this can cause the engine to run too cold. So then I replace the 3' section with the 2' section, and run it on the other side of the engine - over the exhaust manifold.

//greg//
 
   / Jinma temperature #14  
Looked at John痴 site there was an insert about nylon and duct tape. I did just that. We will see, I have a full weekend of brush cutting .I also installed an overflow for the radiator. I will put her to the test. Thanks for all the input , Robby
 
   / Jinma temperature #15  
I put it to the test. I installed an overflow and some window screen on the front of the rock gaurd. I brush cut for at least 8 hours.The outside temp was 98f and the motor stayed around 80c . I would call that good. Thanks for all the input, Robby
 
   / Jinma temperature #16  
jaroban said:
I put it to the test. I installed an overflow and some window screen on the front of the rock gaurd. I brush cut for at least 8 hours.The outside temp was 98f and the motor stayed around 80c . I would call that good. Thanks for all the input, Robby

The window screen will still pass some fine dust thru to the radiator. To deal with this I made up a air blow gun extension using a piece of aluminum arrow shafting. If you don't shoot, you can get single arows at places like wallmart. Most mass produced aluminum arrows have a forged end that the knock glues to back by the feathers/fletching. If you break off the plastic knock with a pair of pliars, you are left with a smooth rounded point. Just above this point on the side of the shaft I drill a 1/8" diameter holein the side perpendicular to the shaft. I also shave off the feathers with a razor blade. I cut off the other end of the shaft long enough to easilly reach diagonally across the face of the radiator. The arrow I chose was large enough to just slip over a 4" screw in aluminum blowgun extension pipe. I epoxied these 2 pipes together. This gives me a 24+" blowgun that shoots at a 90 degree angle and has a smooth pointed tip.

At the top rear corners of the radiator on my Jinma where the shroud is connected are small gaps just large enough to insert this blowgun pipe into. From these 2 holes I can reach the entire rear face of the radiator with the tip of hte pipe, and blow air forward thru the air passages. Even with 2+ layers of screen, I still manage to blow out quite a bit of dust from the air passages at maintenance time.
 

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