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D7 3T pony motor not starting

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1 year 2 days ago #248497 by ctsnowfighter
Cereal c
Box cardboard, poor man's gasket material, and it works!

Other than keeping original, nothing says you can not use a different carb, many have done this out of necessity, but even finding carbs is getting harder.

Cts
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1 year 2 days ago #248498 by V14
Replied by V14 on topic D7 3T pony motor not starting
I may try and use cardboard for the day but rebuild will be done regardless next week. If the rebuild doesn't fix it then I can look at carbs. I did see one original style that's new but that's 700 bucks so I'd probably search for a different one that would fit to save a bit.
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1 year 2 days ago #248507 by V14
Replied by V14 on topic D7 3T pony motor not starting
Well I cleaned off the permanent gasket and made a cardboard one. Still had to hold the choke lever to keep it sealed but it stayed running long enough to actually turn over the big engine. Obviously air was part of the issue but it seems something is still blocking the carb so rebuild should fix it fully.

The more concerning thing is now that its running ive got what looks like oil dripping down the radiator. Couldnt see any reason oil would be up there unless now that its getting hot its just burning off old sludge that built up on the housing? The water temp reads green and the oil pressure is max so maybe nothing or maybe something bad.
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1 year 2 days ago #248509 by josh
Replied by josh on topic D7 3T pony motor not starting
Sounds like your oil cooler is leaking.
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1 year 2 days ago #248510 by V14
Replied by V14 on topic D7 3T pony motor not starting
That would make sense since the prior owner did say there was a slight oil cooler leak...looks quite a bit more serious than slight so that should be the next project. Water pump was not leaking after all probably just because I over filled the radiators that's a positive.

Do you have any insight into fixing oil cooler leaks?
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1 year 2 days ago #248515 by ctsnowfighter
Oil Cooler leak: at this point, you still do not have the diesel running.
You have a lot of diagnosis ahead of you, and lots of unknowns, one step at a time.

Get the diesel fired up and unload, then you can put the tractor where you can easily work on it and at your leisure.

CTS
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1 year 2 days ago #248516 by V14
Replied by V14 on topic D7 3T pony motor not starting
Diesel was running when the leak was observed, but it is still on the trailer since the driver couldn't make it out when I had it running. Will dig deeper into it this weekend it should be off the trailer tomorrow.

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1 year 2 days ago #248519 by neil
Replied by neil on topic D7 3T pony motor not starting
To answer your question, if it's a hole in the cooler element and you want to continue to use it, it's either repair or replace. I'm not familiar with that particular tractor but an option for other tractors is to bypass the cooler if it's not expected to work hard. Repair can work but the success rate varies depending on where the leak is e.g. in the tubes vs. the top/bottom tanks / connection tubes. Repair options range from patching the actual hole with solder, epoxy, or other materials, to isolating a leaking tube by cutting and closing it top and bottom.

Cheers,
Neil

Pittsford, NY

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1 year 1 day ago #248521 by V14
Replied by V14 on topic D7 3T pony motor not starting
That's helpful, I'll figure out where the leak is when it's off the trailer. I'd prefer to fix it but if I can't it would probably be ok to bypass. It doesn't get too hot here and I don't plan on running it for 8 hours a day or anything.
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1 year 1 day ago #248525 by V14
Replied by V14 on topic D7 3T pony motor not starting
Dozer is off the trailer, looks like my next projects are oil cooler, carb rebuild, sticky right brake, and figure out why the blade wants to rise on its own. Then I can get new oils in and fix up my acreage.
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