YM 155D Snow thrower??

chevy791979 · Oct 29, 2018

Looks EXACTLY the same as mine. Minus mine has a loader. Great looking tractor. I'm glad to see there is a few of these left that are in as good of shape as mine. I'd say you did very well on the purchase. I'd love to see a video of it running the mower.

A few things I'd suggest, run the valves on it. Mine has 370 hrs now and I went through mine when I got it and found mine were all out by .002-.005 above the spec ( I believe it is .008 ex and .006 in). Don't " " on the spec. I can check when I get home.
Id do a full service to it. Oils and filters. Hoye tractor can help you . Or a local parts store can cross the filters.
I personally would buy the "T'd" cap for the thermostart bottle. That way your return fuel will keep it full at all times. Also see if the TS works. If it heats up and doesn't start a fire, take the line and fittings apart and clean them.
I would also put the mechanical temp gauge on it. I don't like "idiot" lights. And of course check your antifreeze freeze point. I run 50/50 mix in the winter. Change it in the late spring. That's just me though.

Anyway, nice tractor. If you ever want to sell that mower let me know. Depending on where you are located I'd buy it

Jtullis13 · Oct 29, 2018

Thanks for all your suggestions. I planned on changing all the fluids on the machine. I have all engine oil but need a filter yet, going to order from Hoye. I have the trans oil, but was questioning the front axle oil, I was thinking 75w90 full synthetic. Mine has 370 hours on it now and was thinking about adjusting the valves on it. Was it difficult to do on yours? I am missing the radiator overflow bottle on mine, the bracket is on the radiator but that is it. So I will need to get a bottle and figure out how to mount it on the radiator. I haven't tried the fuel thermostat start on mine yet, and I haven't seen the "T'd" cap for this before. Do you have a picture of yours? I did plan on installing a mechanical thermostat in the upper radiator hose as well unless you have a better idea on this tractor? That is what I have done in my 2210d. As for the mower, I would be interested in selling it, however it looks like you are about 500 miles from me....

chevy791979 · Oct 29, 2018

Hoye sells the T' d cap they also sell the metric adapter fitting or a whole kit. Look on their website. Choose your tractor and you see it all

chevy791979 · Oct 29, 2018

Jtullis13 said:
Thanks for all your suggestions. I planned on changing all the fluids on the machine. I have all engine oil but need a filter yet, going to order from Hoye. I have the trans oil, but was questioning the front axle oil, I was thinking 75w90 full synthetic. Mine has 370 hours on it now and was thinking about adjusting the valves on it. Was it difficult to do on yours? I am missing the radiator overflow bottle on mine, the bracket is on the radiator but that is it. So I will need to get a bottle and figure out how to mount it on the radiator. I haven't tried the fuel thermostat start on mine yet, and I haven't seen the "T'd" cap for this before. Do you have a picture of yours? I did plan on installing a mechanical thermostat in the upper radiator hose as well unless you have a better idea on this tractor? That is what I have done in my 2210d. As for the mower, I would be interested in selling it, however it looks like you are about 500 miles from me....

So you are saying you won't deliver it. Hahaha.

I have all the manuals for this tractor if you need anything. Most all the P/N still come up if you search them. Alot of these engines we're in the marine industry.

Jtullis13 · Oct 29, 2018

Yeah I might have to hit you up for some information in your manuals at some time. Hmm 500 miles one way.... LOL. I looked on Hoye and didn't see that T'd cap. I was also wondering what other tractors wheels would fit this tractor. I am sure if I research I can found out. I am wanting another set to put turf tires on it.

clemsonfor · Oct 29, 2018

Jtullis13 said:
Sorry this took so long, but I had a busy weekend. Here are the pictures of my recent 155d purchase. I took the mover off the tractor for now so I an do some maintenance on the little guy first. Let me know your thoughts. View attachment 576650 View attachment 576651 View attachment 576652 View attachment 576653 View attachment 576654 View attachment 576654 View attachment 576655

Stole it!!! Cool little tractor

clemsonfor · Oct 29, 2018

Jtullis13 said:
Sorry this took so long, but I had a busy weekend. Here are the pictures of my recent 155d purchase. I took the mover off the tractor for now so I an do some maintenance on the little guy first. Let me know your thoughts. View attachment 576650 View attachment 576651 View attachment 576652 View attachment 576653 View attachment 576654 View attachment 576654 View attachment 576655

Is that mower a rebranded Bush Hog brand. Looks very similar to an old one i have that im trying to get going at some point

Jtullis13 · Oct 30, 2018

I don't know if it is or not Clemsonfor. It does have a genuine Yanmar tag on the side plate with a serial number. Now that doesn't mean that Brush Hog didn't make it and put a Yanmar tag on it.

rScotty · Oct 31, 2018

Jtullis13 said:
I did plan on installing a mechanical thermostat in the upper radiator hose as well unless you have a better idea on this tractor? That is what I have done in my 2210d. ...

Thank carefully about that mechanical thermostat? That YM155 has thermosiphon cooling & hence no water pump. I wouldn't recommend a thermostat....wouldn't want to put any extra restriction in the cooling flow. Thermosiphon systems don't flow very much at the best of times and are kind of picky about their cooling.
You must keep the antifreeze to 50% ethylene glycol & 50% water, the radiator fins clean, and the gasket packing between radiator body and frame mount in good shape. The idea for the last thing is to make sure the fan is pulling air through the fins and not from past the the sides or back of the radiator.

On the block heater, I'd get that part from one of the Yanmar dealers - not from a local automotive house. Although the threads that Yanmar put in the engine block where the heater fits looks like standard US variety NPT tapered pipe thread, it is actually a slightly different thread profile used by Yanmar and threaded to the BSPT standard. Get the right one; the wrong one will thread in just almost well enough to stay in place but will leak forever, and trying to thread it in will ruin the BSPT threads in the block.

The thermostart is easy to fix or replace and lots of fun to play with. It also works pretty well for cold weather starts - although in my experience nothing works as well as a block heater and a blanket over the hood.

Nice little tractor, good luck.
rScotty