New YM1700 has questions

SailorBob · Mar 9, 2005

I know this is probably a stupid post but, I am a new tractor owner. I have had the tractor for about 3 months and so far I love it. I cannot seem to find the proper coolant mixture. I noticed some posts regarding overheating due to improper coolant mixture. I decided to perform routine preventative maintenance and discovered the temp bulb burned out. I replaced the bulb and the very next time I used the tractor the temp light came on after about 5 minutes at idle speed. I do not believe the engine was hot since I could hold my hand on the side of the block. Out of an abundance of caution I shut down the engine and checked the coolant and it was fine. The water was hot to the touch but no where near boiling. I suspect the temp sensor may be bad. I have ordered a temp gauge kit for it just to give me a warm fuzzy about it. Has anyone experience this? I assumed the standard 50/50 mixture. I wish that I had found this site before purchasing my tractor. Great site by the way.

I also bought the Yanmar Service manual from Hoye tractor on CD and it is actually the YM195 so assume that is the US equivalent . However, the manual contains everything you could ever want to know except that. At least I can't find it.

Soundguy · Mar 9, 2005

This is a thermosyphon engine.. try a 30/70 mix of collant and water instead.

While you are waiting.. grab your ohm meter, cooking thermometer, pot of water and a stove and see when that bulb/sender pops.

Course.. imp[roper coolant mix can inhibit proper flow in the thermosypjon eng. I hope yours is just a bad sender..

Soundguy

Whiskey · Mar 9, 2005

SailorBob:

Welcome to the site, and the info you loking for is to be found somewhere here in a search.....don't hold me to it but I think it's 70/30

Whiskey · Mar 9, 2005

good thing soundguy bet me to it....I was backward...story of my life /forums/images/graemlins/blush.gif

SailorBob · Mar 9, 2005

Thanks guys for the information.

Soundguy,
I am confused about the cooling system. The service manual that i bought shows a water pump. It does appear to me to have a water pump. I know that I am new to tractors and diesel engines and you are probably right. There is a fan pulley running off the fan belt and it does appear to be a water pump to me as well. I am certainly no mechanic by any means.

I will try your suggestion. I have topped of the coolant recovery tank a couple of time with pure coolant . Perhaps that has change the mixture too much.

Tractors4u · Mar 9, 2005

</font><font color="blue" class="small">( The service manual that i bought shows a water pump. )</font>

Didn't you say you bought a YM195 service manual?

The 1700 does not have a water pump. Look at your engine and radiator. There should be 2 hoses. One at the top of the radiator and one at the bottom. What are they connected to? Is there are water pump between the hoses and the engine? I have heard of people putting YM2000 water pumps on Ym1700's. Could be. /forums/images/graemlins/confused.gif

SailorBob · Mar 9, 2005

Brent,

Yes. I ordered the a YM1700 service manual from Hoye Tractor. What I recieved was a YM195 manual. Just about everything about my tractor does appear to be the same as the YM195. The only differnce I have discovered are I have a ROP and the manual shows a 8 speed transmission but, mine has a 6 speed. Also it has a multiple speed PTO. I am sure it must be a grey market tractor.

As for the hoses I am not sure about that. I know that there is a hose at the top between the top of the radiator and the to the inlet on the top engine. I am work right now and will have to wait until I get home tonight to look at it. You guys are probably right. I may have too much coolant in it. I have used it about 25 hours and have had no problems at all.

It starts up fine and runs great. I have never seen any signs of it overheating. I did notice that I waited about 2 hours and switched the ignition switch on and the temp light was still on. The engine was surely cold. The next morning I switch it on (not cranking it) and the light was off. That makes me think the sensor is faulty.

ducksjunk · Mar 10, 2005

I don't know about the 1700, but my YM195D has a water pump. That is what that manual will show.
Richard.

Soundguy · Mar 10, 2005

The grey units smaller than the 2000 were thermosyphon.. but like brent said.. a 1700 can take a 2000 water pump.

Also..to the original poster.. check that tranny shift pattern again.. you should have 4 gears.. and a range selector on the right side... not a 6 speed.

The 195/240 is a similar us model to the 1700. there are some significant differences.. but its a good close match for exploded diagrams.. etc. I purchased the same manual from len schafer years ago.

Soundguy

SailorBob · Mar 10, 2005

appreciate your help. I suppose that it does not really matter as long as it is cooling properly. I looked at the tractor again last night and I will attempt to describe the setup. The top radiator hose attaches to an inlet at the top of the engine not to what I perceived as the water pump and the bottom radiator hose is attached to the bott tom of the block. The fan belt go around a pulley with a shaft running into the device that I thought was the water pump.

I have decided to just drain the cooling system and refill it with the 30/70 mix recommend. Hopefully,. I will have the temp gage by the weekend so that I can install it as well. If I don't I may try the hot water with the ohm meter test. Then I will know for sure if there is a cooling problem. I don't want to take a chance on damaging the engine.

If it is not too much trouble I have another question regarding the engine oil. I changed the oil and filter last weekend as well I used Shell Rotella 15W40 oil. A friend of mine with a tractor recommended that oil. I had always heard that diesel engines need 40 weight oil. I know these small engines are probably different from larger engines. I know that most sailboats with diesel engines use 40 W oil. The temperature range here is between 50 - 70 degrees here this time of year. I have only run it about 30 minutes since changing the oil.

I have so much to learn about tractors and scanning back through this forum has been very interesting. If I become a pest please let me know.

Thanks,

Bob