YM1500D water pump

[reb]

Read a thread started about 7 years ago (http://www.tractorbynet.com/forums/yanmar/181464-yanmar-1500-water-pump-solution.html) and got to thinking.

Hoye now offers a water pump kit for the 1500. It is probably the best way to go. However, my Scotch ancestry and DIY attitude said to try something similar to VT_Hokie's fix. I found a smaller pump than he used for less than $40 on Ebay. Another $40 or so and some miscellaneous copper fittings and steel I had laying around, combined with some time, of which I have more than money, produced a workable solution to the overheating problem.

Got it all together this evening and took the tractor out for about 45 minutes of mowing. The outside temperature was only in the middle 70s, so it wasn't a really strenuous test. I let the coolant temperature get to 160 degrees and turned the pump on. It immediately dropped to about 150 and gradually rose to 165 before I quit. Considering the temperature was getting to 230 (I'm too lazy to change the antifreeze twice a year, so I have used a 50-50 mixture in the radiator) a couple of weeks ago, this seems to do the job. Wish I had done it years ago.

 

[Kustrud]

Any pics?

 

[reb]

Maybe in a day or so. Still have a couple of things to do to it.

 

[clemsonfor]

We need pics, or the folks that would be interested in this fix would need pics of it to try and do something similar. Plus we all like pics.

 

[reb]

Picture of the pump. Still have to put some heat shrink on the electrical connections and some nylon lock washers on the pump clamp.

 

[clemsonfor]

Pretty ingenious.

 

[normde2001]

Nice looking job, but don't be surprised if it still overheats. If it was hitting 230* on thermosyphon the system apparently has some blockage or loose fan belt or something.

 

[reb]

Nice looking job, but don't be surprised if it still overheats. If it was hitting 230* on thermosyphon the system apparently has some blockage or loose fan belt or something.

Thanks.

I suspect the high temperatures were at least partially because I left the 50-50 antifreeze in year around. The radiator was replaced a few years ago and I have not noticed any slippage of the belt.

 

[clemsonfor]

Nice looking job, but don't be surprised if it still overheats. If it was hitting 230* on thermosyphon the system apparently has some blockage or loose fan belt or something.

Light does not come on till 248F according to an old post California posted in another thread , quoting 1danny years ago. So that is still within specs.

 

[mrmikey]

I suspect the high temperatures were at least partially because I left the 50-50 antifreeze in year around.

What makes you think the 50-50 mix would make it overheat?, just curious...............Mike