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Good news and questions

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Neal(IN)

05-15-2001 04:45:56

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The good news is I finally got to use my genuine rebuilt TO-20. Mowed for about 4 hours in really tall grass with a 6 foot finish mower and she just walked right through it. Very Happy.
Questions.
I have what I think is a lot of slop in my throttle linkage. Most of it seems to come from the area where the verticle rod connects to the governor arm with a spring. At idle the rod sits on the arm but when you add throttle it rises maybe a quarter inch before all the slack is gone. Is this about right or what. FYI the spring looks fine.
Also the on the carb the throttle shaft and choke shaft are really loose in the bushings even though they are new from a rebuild kit. Can anyone recommend a place to get a rebuilt carb or place to get mine done? I want to stick with the original Marvel Schebler and noticed some of the places that offer carbs state they replace (in my mind not the same carb) the original.

Thanks Neal

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David Waymann

05-16-2001 08:06:36

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Re: Good news and questions in reply to Neal(IN), 05-15-2001 04:45:56

Neal: Bill's pictures are very helpful. I checked my TO-20 out and I am pretty sure it is set up as pictured in the manual and Bill's pictures. When I go from low throttle (throttle lever in full up position) to about 1/3 of the full 65 degree travel (down), the vertical rod attached to the governor pulls up on the governor causing it to move (clockwise pivot) to a stop point (there is an audible click/clunk). Further movement of the throttle lever causes additional tension on the spring but no further movement of the governor. So, I supect that you either have a spring that is too long (you have mentioned this) or the vertical rod needs to be adjusted (shortened) via its threaded ends. Have you tried to go through the adjustment process outlined in the IT manual? It may be worth doing this before replacing any parts. I am not even sure that mine is adjusted 100%. If you'd like give me a call and I can take the portable phone out and we can compare notes about how things are set up. Let me know. Good luck, David (in Michigan)

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Neal(IN)

05-16-2001 15:37:39

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Re: Re: Good news and questions in reply to David Waymann, 05-16-2001 08:06:36

Dave
You couldn't be more right about Bill's pictures.
I used the procedure from the Ferguson shop manual for adjusting. I suspect it is the same as the IT manual. The reason I think the spring is the culprit is that the manual says that in the idle position the bottom of the governor rod (what I've been calling the vertical rod) should be sitting on the top of the governor arm holding the arm in the idle position. If you do this then the distance between the two places where the spring attaches cannot be adjusted. In Bill's photo it looks to me as though the spring is slightly stretched even in the idle position. This would mean that as soon as the governor rod starts to lift the governor arm would begin to move. On my linkage, when the governor rod is sitting on the governor arm (idle) the spring is slack and in fact is almost lined up with the groove in the rod where you would remove it. So when I begin to move my throttle I have to move it far enough for the spring to bottom in its groove on the rod before the governor arm even starts to move. I believe this is where all (or most) of the slop is. The manual mentions shortening the spring if necessary and I may try that but my local salvage guy has a bunch of stuff so I will try him first.
Thanks for all your help and if this doesn't work out I may well take you up on the phone call.
Sorry to be so long winded but I couldn't figure out how to do a shorter description.

Neal

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Bill Mc 2nd pic

05-15-2001 21:48:03

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Re: Good news and questions in reply to Neal(IN), 05-15-2001 04:45:56

TO20 governor spring at low throttle position.

Bill Mc

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Neal(IN)

05-16-2001 05:01:14

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Re: Re: Good news and questions in reply to Bill Mc 2nd pic, 05-15-2001 21:48:03

Bill

Your pictures help a lot. In fact I think I see the answer. In your first picture (low throttle position) the spring looks like it is just a little bit stretched or at the very least the end where it hooks on the rod is bottomed out. On mine the spring coils are touching and the end in the rod is up almost in line with the notch where you remove it. Basically I think the spring is to long. Whats interesting about this is that this is the second spring I've used (original and from salvage yard) and had the same problem. Not only that but I have replaced the rod assembly with one from another tractor. So I think I now know where the problem is. I just need to fix it.
Thanks again this is great stuff.

Neal

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Bill Mc

05-15-2001 21:41:33

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Re: Good news and questions in reply to Neal(IN), 05-15-2001 04:45:56

Hi Neal

I took a pic of my TO20 governor spring at full throttle.It sounds to me like the spring is missadjusted or not attached properly. Hope this helps Good Luck.

Bill Mc

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Ray,IN

05-15-2001 21:06:24

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Re: Good news and questions in reply to Neal(IN), 05-15-2001 04:45:56

Hi Neal, have you checked the shaft the governor lever attaches to for binding? I too will look at my tractor and observe the action of the linkage, I'm hoping mine is correct, it's never been worked on or repaired. I expect to pass your place Wed. or Friday, I'll try to allot time to stop and see your new tractor, anyway it looks new. I still have your phone no. I'll call before I visit.

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Neal(IN)

05-16-2001 05:03:21

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Re: Re: Good news and questions in reply to Ray,IN, 05-15-2001 21:06:24

Ray

Sounds like a plan. I will be home Wednesday and may even be mowing. Friday is a maybe. There is an auction over by Terre Haute we may go to. By all means give me a call and we will find the time to talk Fergie.

Neal

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David Waymann

05-15-2001 05:40:17

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Re: Good news and questions in reply to Neal(IN), 05-15-2001 04:45:56

Neal: The job you did restoring your TO-20 was excellent! I have a 1949 TO-20 and have replaced the throttle linkage pivots (under the dash), the throttle plate washer (cork) and the u-bolt for the throttle shaft. My set-up is very tight now. I wonder if some of the slop you are experiencing is where the throttle rod goes through the u-bolt or with the spring connecting the rocker arm of the throttle rod to the governor. I am going from recall right now, but I'd like to take a look at mine and report back to you if I see anything that you might want to pay attention to. (in some of your posts you suggest that the governor attaches to a cotter pin which does not seen right to me).
Anyway, I'll try to take a look tonight or tomorrow and report back. David (in Michigan)

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Neal(IN)

05-15-2001 10:12:55

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Re: Re: Good news and questions in reply to David Waymann, 05-15-2001 05:40:17

Dave

Thanks for the kind words and any help you can give on the throttle.
I think all the areas you mentioned are tight but it won't hurt to check again. What I see happening is this. From the idle position, as soon as I start to move the throttle lever on the dash the shaft running to the front rotates and the vertical rod coming off of the bracket with the U bolt begins to lift but the governor arm doesn't begin to move. This continues until the spring that connects the vertical rod to the governor arm, bottoms out in the slot in the vertical rod at which time it begins to lift the governor arm. At this point there is no stretch in the spring and there is about a 1/4 inch gap between the bottom of the vertical rod and the governor arm.
The spring and cotter pin you read about are in a different location. On the bracket with the U bolt there is arm with a spring on it ( I think it's called a balance spring) that hooks into a cotter pin that is in a hole just under where the front of the gas tank sits. I will need to check my manual and it wouldn't surprise me if the spring should be in the hole instead of the pin but this is a different spring from the one we are discussing now.

Thanks Neal

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