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Fordson Tractors Discussion Forum

fordson F transmission

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John McGaugh

09-18-2007 23:40:30




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I have a whine in second gear probably because this is the gear used most often, what might be the fix, bearings or gears? the other gears are quiet. It shifts into second gear just fine but very hard to get back out, by moving the tractor in short spurts forward it will finally come out, the other gears shift in and out just fine. The engine does not smoke, very easy to start, idles just fine and is running on all 4 cylinders but when you speed up the engine or run it at a little higher RPM it rattles like it is comming apart, it is not the fan. Any suggestions would be appreciated.

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Steve Welker

09-19-2007 19:04:24




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 Re: fordson F transmission in reply to John McGaugh, 09-18-2007 23:40:30  
A few things could cause too much advance in your timing. I amassuming your tractor is running on the original buzz coils. A mis-matched timer set (roller and housing) can cause this as there were many different brands and styles made over the years and not all are identical. I've always prefered the 'Tiger' timer which as far as I know is no longer being made new (have not been able to find one in last 2 years) I've also used the 'New Day' timer with the carbon brush, while they run good I've always felt you could not retard one of these as far.
A second common problem is having a wrong control rod from the timer to the pivot shaft. There were 2 different lengths of the timer rod (I don't have them right now but will get them later)used over the years. If parts were swapped from tractor to tractor these could have gotten mixed. Hope this helps, and I will post timer rod length tomorrow. -Steve

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John McGaugh

09-21-2007 13:45:26




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 Re: fordson F transmission in reply to Steve Welker, 09-19-2007 19:04:24  
Steve this might help, When I have the control all the way counter clockwise right above the brass contact that kills the engine , the lever on the timer is exactly 90 degrees to the engine, if the timer was a clock, the lever would be at 15 minutes to the hour. If you had one you could look at, I could set mine the same by rebending the timer rod, I think it needs to be shorter, how much I don"t know. Thanks John

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SteveWelker

09-27-2007 15:33:23




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 Re: fordson F transmission in reply to John McGaugh, 09-21-2007 13:45:26  
Sorry it took awhile to add a reply. Been very busy. I checked timer rod lengths and early rods are about 12" long and later rods about 13 1/2" long. A tractor with a 'kill' button on the dash at the timer control should have the longer rod, as the support brackets on the head are straight. Ealier tractors (1924 and older) did not have the kill button and shorter timer rod with support brackets that drop down along the head.
In either case, the timer should have the attachment point just below horizontal, or approx. at 20 min to the hour. The further down the more retarded the timing.
If all this checks out, it may be a mismatched roller and timer case. One last possibility is the tiny pin that holds the roller on the cam may be worn or bent. Most times it makes the timing more retarded, but who knows.
Hope all this babbling helps. -Steve

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SteveWelker

09-19-2007 09:30:41




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 Re: fordson F transmission in reply to John McGaugh, 09-18-2007 23:40:30  
Transmission problems as you describe could be either gears or bearings. Either way, to replace either the tractor needs to be split. You can look in at the trans gears by removing the Shifter housing and maybe get an idea of what is wrong. Bearings are availible thru most good bearing houses as they are standard Metric Ball Bearings. Gears are not to hard to come by either. Fordsons gears seemed to last, and most fordsons never wore them out. One thing to watch is the "F" had 2 different transmission ratios availible, if getting used gears make sure they either match the tooth count you have or get a complete transmission. If there is a fordson collector in your area there is a good chance he would have a spare transmission he would be willing to sell. As for the engine rattle, a few things you can check. First check the crank pulley, the pin that holds it to the crankshaft often wears and a crank pulley that is loose can often sound like bad bearings. If crank pulley is tight on crank, does the sound get quieter under load or with the timing retarded. If it does, worn wrist pins or rod bearings that are loose may be to blame. The other big noise maker in a Fordson engine is the cam gears. They make quite a rattle, but this is normally heard at all engine speeds and loads. A good way to better hear where the sounds are coming from is temporarily put a muffler on the tractor to quiet the exaust noise. I always like to drop the oil pan and do a good bottom end check on any fordson when first aquired. Even if they sound good, I like to know what I'm dealing with and it gives me a chance to clean the sludge out of the pan.
Hope all this helps. -Steve

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John McGaugh

09-19-2007 10:40:30




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 Re: fordson F transmission in reply to SteveWelker, 09-19-2007 09:30:41  
Thanks Steve, I think I will pull the shifter and see if I can spot anything. The engine rattle has me stumped. I am going to take it to a tractor show in Prescott this weekend, after that I think I will pull the pan. I know it is nothing in the drive train or clutch, it does not change moving or stopped clutch in or out. One thing on my advance control, It seem like TDC is just one or two notches up on the control lever, beyond that I get the dull knock and have to run with control lever completly counter clockwise. Is there anyway to get the control more centered? I maybe running a little to advanced and need to reset the timing. If I move the lever up close to the top It will fire backwards. My father had three of these F"s when I was just a boy so I am not familiar with some of the operating procedures and the manual leaves some things out. I am the third owner of this tractor, it is very original and I have photos of the original owner and his wife when the tractor was new and put in service at Wray Colorado Sept. 2 1922 By Mr Witte. Thanks

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