Zenoh/ yanmar horsepower questions

[pyramidf]

I have a zenoh/yanmar zf155, the engine is # 3tna72-una. It's a 3 cyl diesel. I've looked everywhere to try and find the horsepower rating and can't.
I broke my yanmar tiller and need to replace it but really can use the horsepower rating for info. Please help I'm a Farmer with little time.

 

[winston1]

I have a zenoh/yanmar zf155, the engine is # 3tna72-una. It's a 3 cyl diesel. I've looked everywhere to try and find the horsepower rating and can't.
I broke my yanmar tiller and need to replace it but really can use the horsepower rating for info. Please help I'm a Farmer with little time.

This may be close. TractorData.com John Deere 455 tractor information Go to engine page on tractor data to see more.

 

[California]

This might be a close match if your tractor is an 80's model: YM186D has a similar engine model #, but the rest of your letters indicate different options.

My YM186D Parts Manual shows:

Engine: 3T72HA.
cubic inches: 53.5.
Raw hp, measured US style on a naked engine: 18 hp.

And the identical engine is used in YM1510D. There, this same engine is rated Japanese-style, measured at the pto output (which is what you need), 15 hp.

This should get you in the right neighborhood.

Can you get another Yanmar tiller the same width as your old one? If you are replacing it with a US tiller, the new one may work the tractor harder if it has bigger tines compared to the 'rice paddy', slicing, tines on Yanmar's tillers.