Thermo king/yanmar motor

[cooperino]

Originally Posted by CADplans

My first diesel mower was a Cushman,,
It had a horizontal engine with the cylinders laying down,, there was a box shaped radiator above the two cylinders,,

The top of the engine was completely open, probably an 8X8 inch square.
The rad bolted to that, the engine and radiator were then filled with water,,

The hot water would rise, the radiator would cool that water,,

It was a pretty foolproof system,, no hoses, no pump,,

I'm familiar with them. The ones I've seen anyway. Some poorly engineered ones had issues with mixtures to get proportions correct. Too heavy no flow. Too light not enough flow. Most all suggested some amount of glycol to keep from freezing.

[cooperino]

Originally Posted by ol'George

a lot of 2 cyl John Deere tractors are running and they are thermo siphon.
Just like the ford model "T"

Never worked much with old JD's myself.
I did have a T bucket for awhile. But it had a big block Chevy in it. It had a high flow belt driven water pump.. along with a belt driven roots blower

[V30crewcab]

to answer your original question, yes it can be used for a swap, but only if you kinda know what your doing. most swaps end up in a pile of parts that get junked or sold off. but if you do it, document it here. sounds cool.

[northernredneck]

Awesome guys I appreciate the guidance and info. Just looking for a tinkering project to keep me and the boy busy for awhile.

[greaseburner]

Kubota also used this system, engine model was a ZB600, 35 cu. in., 12 HP. actually worked quite well if you kept the fins clean. Cylinders were horizontal, radiator sat on top of block. Carrier used Kubota just as TK used Yanmar in the first diesel refrigeration units for box trucks when diesel chassis were just getting popular in the late 70's, early '80's before they went to the D600, then the D722. Good luck finding parts, Yanmar engine dealers are few and far between

[cooperino]

I'm with greaseburner on this one. While it would be nice to have a diesel in that tractor I'm not sure the pros of that particular engine weigh out the cons IMO. In the thermo king unit it doubt that engine ran more than 1200 - 1300 rpm. Your going to be asking more of it than that for your tractor. I dont know for certain but did thermo king do this with a governor? Or with the injection pump? Will you be able to find parts if need be to make it run higher rpm?

[cooperino]

Originally Posted by cooperino

I'm with greaseburner on this one. While it would be nice to have a diesel in that tractor I'm not sure the pros of that particular engine weigh out the cons IMO. In the thermo king unit it doubt that engine ran more than 1200 - 1300 rpm. Your going to be asking more of it than that for your tractor. I dont know for certain but did thermo king do this with a governor? Or with the injection pump? Will you be able to find parts if need be to make it run higher rpm?

Did a little digging. Here is a thread from another forum I found to be interesting. Seems this persons Yanmar from a reefer unit has no throttle lever at Injector pump. Or fixed rpm setting.

Here is the link and post

https://www.tractorbynet.com/forums/...ed-yanmar.html

I found a small fixed speed 3 cylinder Yanmar Thermo-king diesel that has no throttle lever for speed adjustment. I would like to change it to variable speed by replacing the injection pump. Not much information available from engine tags.
Does anyone know what is required? Perhaps just a new injection pump with a throttle lever?
Numbers on block are K6K29977
Valve cover
TK3.74
K29977
Any info would be appreciated.

Thanks 90Cummins

[northernredneck]

Cooperino I appreciate the insight, I have come to the conclusion that this probably would be in fact a huge PIA to try to retro fit. Once again I appreciate everyone's insight. Guess we will just rebuild another tractor for 4H.