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Having gone through several engine block heaters on my Farm Pro 254 in the last 20 years I have seen a pattern.
The copper connectors molded into the silicon? molded electrical cord connections corrode and loosen and then fail.
Extreme heat is the problem.
To Ameliorate the problem I have flipped the position of the block heater so that the generated heat accumulates in the aluminum body of the heater and the copper cord connections are at the bottom of the heater and not on top. I simply loosened the two hose clamps and rotated the body of the heater.
It appears that this has also quickened the warmup because the heat can readily rise into the engine block water jacket. -
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David;Great observation and thanks.
I was wrong to call it a “block heater”.I was referring to a lower radiator hose heater and the silicone rubber cap that holds the 4 copper contacts for temperature switch and immersion heater. When that silicone cap is oriented to the top of that lower radiator hose it degrades from heat and always fails first.
Rotate the heater 180 degrees to reduce or eliminate the problem. -
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I to have a lower hose heater on my dong feng le204a , I will take a closer look at mine as I have not had any trouble with it, but I only used it once this past winter. I put mine on a 10 amp appilance timer and have it kick on a coupla hours before I want to use the tractor. I guess that also would minimize a over heating issue.
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David;The heat generation will deteriorate those copper connections and silicone cap.
I have had three fail in 22 years. All from excess heat.
If your electrics are in the upper orientation simply loosen the hose clamps and spin it.
All that heat will go into the block and not the electrics.
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