Bad compression

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brewzalot
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Re: Bad compression

Postby brewzalot » Tue Feb 21, 2017 8:41 pm

ParlowMillFarm wrote:Could the minuscule amount the fan flexes during use be hitting my new tube


Fan blade cracked allowing more than minuscule movement when running?

ParlowMillFarm
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Re: Bad compression

Postby ParlowMillFarm » Tue Feb 21, 2017 10:07 pm

Jim & Brewalot,

Thanks for the input. I'll check for small hairline cracks and repaint the tube tomorrow before final assembly (if the new fan belt comes)

I did notice the tube missing a lot of paint, but that may be because of all the banging around as I have taken off the fan and pu back on 5 or 6 times now.

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Glen
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Re: Bad compression

Postby Glen » Fri Feb 24, 2017 2:00 am

Hi,
John, I'm wondering if your fan belt is too long. You probably put on a new one. The new ones I buy at Case IH make the fan hub shaft a little below half way up the slot in engine front cover. If the belt is too long, the fan will be up higher, and might hit something at the top of the fan's rotation. :)

ParlowMillFarm
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Tractors Owned: 1949 Cub
1964 JD1010
Location: Marion, Massachusetts

Re: Bad compression

Postby ParlowMillFarm » Fri Feb 24, 2017 2:35 pm

Glen,

Well the issue is certainly fan belt related. I did not buy a new fan belt. The one I have on there has been on there for a long time. I noticed during the "rattling sound" episodes that my generator belt was loose - as in too long because my generator was at the end of the bracket. I got it into my head that perhaps I got the current belt at a local auto parts store and it was not the right size. So I ordered a new one.

The new generator belt arrived and I got the fan hub back on with both belts and noticed that the generator belt was still loose. I then thought perhaps that a PO swapped out the generator bracket at some time and that was causing my problems.

So I went back to the clacking sound issue as I could get the generator bracket fixed later.

I knocked the bottom keeper of the overflow tube in toward the radiator to the maximum amount. I then cranked the fan over and noticed it was hitting the top of the fan guard and the overflow tube up top.

I dropped the fan hub a little so the fan cleared the tube and guard. This also tightened up the generator belt to the right tension.

So I guess both my problems were self induced by an over tensioning of the fan belt.

Just a few minor things to do before I take it for a test run. I want to put a few hours on it before I test the new compression.

John


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