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Where to start troubleshooting

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Mike CA

11-17-2006 09:00:03

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It may be pointless, but if it's easy I'll give it a shot. I say pointless because I'll be taking it all apart anyway, and probably replacing a good portion of it... but anyway, on to my topic...

My temperature gauge does not work on my '46 H. When the tractor was running for about 5 minutes or so the gauge did not move. Oil pressure gauge read fine, but the Water Temp was dead.

I'm sure there as many things that could be the problem as there are parts that make up the temperature / cooling system. But what is a step-by-step guide that I can start checking that maybe I can find a loose wire, or something easy?

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Janicholson

11-17-2006 11:28:36

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Re: Where to start troubleshooting in reply to Mike CA, 11-17-2006 09:00:03

Mike I'm going to recomment that you do not take apart the tractor until you have put maybe 100 hours of messing around on it. The reason is that for a novice to attempt to disassemble a tractor into bits then reassemble it is a disaster in the making.
Running it will provide a image of the things that are wrong, need repaired, are broken, or (as is likely) just fine.

A complete rebuilding (as you stated above "replacing a good portion of it") is something done after incremental experience, not to gain the experience. Start by volunteering to assist local mechanics at a farm shop or dealership. Gaining apprentice knowledge is invaluable. I mean no disrespect, I teach University students, they have the worst time learning when the whole project is spread out and seems impossible. Good luck, My input is to assist your success. JimN

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Mike CA

11-17-2006 11:39:25

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Re: Where to start troubleshooting in reply to Janicholson, 11-17-2006 11:28:36

Well, to some degree I will have to break down the tractor to restore it's finish. Its mechanical condition is an unknown right now. I know it runs, but I have to do several things to get it to run constently, rather than shutting down after 5 minutes. A compression test is in order to assess the engine. If the engine compression is good, and I can't find anything really wrong with the gearing and what-not, then I will take it apart enough to restore the finish.

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Janicholson

11-17-2006 12:26:24

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Re: Where to start troubleshooting in reply to Mike CA, 11-17-2006 11:39:25

Good option. Putting in time with it is a great idea. (and the less it is spread out the better it appears to significant others. JimN

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Brownie 45

11-17-2006 10:53:35

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Re: Where to start troubleshooting in reply to Mike CA, 11-17-2006 09:00:03

If your thermostat is 160 degrees & is working properly, the needle might move up to the lower end of cold after awhile. If it is 180 degrees, you might see it up in the run or green area. To check it out on the tractor, put a feed sack ahead of the cowling to block air flow, & put some kind of load on the tractor[work it]. See if the temp doesn't come up. Another check is to look in the radiator neck after you first start the engine & if the coolant is already circulating, the thermostat is probably stuck open.

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John in Ne.

11-17-2006 09:46:57

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Re: Where to start troubleshooting in reply to Mike CA, 11-17-2006 09:00:03

The only time I have ever seen the gauge on my 48 H move is when I plow with it. John.

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Mike CA

11-17-2006 09:37:39

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Re: Where to start troubleshooting in reply to Mike CA, 11-17-2006 09:00:03

ahh, ok. Well good then. I'm an idiot, and it probably works fine! :)

Thanks guys!

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Brian in NY

11-17-2006 10:04:49

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Re: Where to start troubleshooting in reply to Mike CA, 11-17-2006 09:37:39

Mike,

If you are really going to rebuild Oscar from the ground up, you are going to have to get used to feeling silly/ignorant/stupid from time to time.

By reading as many H posts as you can, and by trial and error....you will be giving others sage advice sooner than you think.

That's one of the great parts about these forums....preservation of knowledge.

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RustyFarmall

11-17-2006 09:24:29

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Re: Where to start troubleshooting in reply to Mike CA, 11-17-2006 09:00:03

Your temperature guage is a mechanical unit, no electricity involved. The engine will need to run for much longer than 5 minutes before you will see any movement, and the tractor will actually need to be working before you will see much movement at all. These guages do quit working sometimes, but not very often. If you want to check it, you will need to completely remove it from the tractor, and then drop the sensor end into a pan of boiling water.

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Tom Windsor

11-17-2006 09:45:03

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Re: Where to start troubleshooting in reply to RustyFarmall, 11-17-2006 09:24:29

Please, do not attempt to remove this unit until you are ready to purchase a new one....99 times out of 100 they are so frozen up in the adapter that you will twist it off removing it.

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RustyFarmall

11-17-2006 11:42:50

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Re: Where to start troubleshooting in reply to Tom Windsor, 11-17-2006 09:45:03

Yep, you are 100% correct, and when that bulb comes off, the entire guage is toast.

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Nat 2

11-17-2006 09:23:33

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Re: Where to start troubleshooting in reply to Mike CA, 11-17-2006 09:00:03

5 minutes isn't enough time, really, especially if all the tractor is doing is sitting there idling.

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