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Yet another SMTA Generator question

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Chad

09-08-2003 14:22:34

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After reading up on generator questions from both archived posts and written articles in the technical section of this forum, I decided to take the generator apart on my SMTA to investigate the charging problem. The first thing I noticed was the fields wire inside the case was no longer attached to the stud terminal. It looked as though the previous owner tried to spot weld the wire to the terminal. My question is how should this wire and terminal be connected (weld, solder, mechanically fastened?). The stud terminal looks very bad so I thought I would replace it. Is this a very common part number?

Thanks a bunch for your help. I've gained a much greater understanding of the mechanics involved with the charging system because of the input from this forum.

Chad

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Bob M

09-08-2003 18:35:15

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Re: Yet another SMTA Generator question in reply to Chad, 09-08-2003 14:22:34

Chad - As you have discovered the generator won't work with the field wire disconnected! The field wire should be soldered to the F terminal stud inside the generator. If the stud is damaged (sounds like yours is), the cheap fix is to drive the stud out, stick an insulating grommet in the hole, extend the field wire outside the generator, then connect the regulator F wire to the extended wire. Alternatively you can take it to a starter/alternator shop and have them replace the stud. Should be a relative inexpensive fix - especially if you've already got the generator apart.

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Chad

09-09-2003 07:43:17

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Re: Re: Yet another SMTA Generator question in reply to Bob M, 09-08-2003 18:35:15

Bob,

Thanks yet again for your input as it has been the difference between me understanding the problem and just ignorantly sending the unit off to some shop. Your diagnosis of the problem from a previous post as being in the 3rd bush or in the fields circuit proved dead-on!

What has amazed me as I've worked on the SMTA (and from reading the posts of this forum) is the level of serviceability that is incorporated into these tractors. I wish modern tractors and automobiles were this easy to work on.

Thanks again,
Chad

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scotc

09-10-2003 19:23:22

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Re: Re: Re: Yet another SMTA Generator question in reply to Chad, 09-09-2003 07:43:17

Then they dealers wouldn't make any money with their shops and the makers wouldnt make any money with parts. But how is it a 30-yr-old carbed big-block can get upwards of 25 mpg, but todays 4-bangers with efi usually dont get much better? I think maybe the tractor makers also realized that if they keep making things as easy to fix as they used to be, eventually they wouldn't be able to sell as many new machines

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