[AT] Dean Vinson's Tractor Puzzles

[STEVE ALLEN]

Hi, Dean!


I know next to nothing about the 620, but could that wire go to a kill switch?


I know even less about that Ford 3600, but I tend to think you are right in thinking that starting the tractor with the PTO in gear is going to add effort to the starter and ring gear, either multiplied or divided by the drive gears (I'll leave that question to an engineer), and it probably not a good plan except for the rare emergency.


I wish you the best as you tinker--I hear you about needing motivation ;-)  Mine comes from reviewing my file of Green Mags :-d


The "original" Steve Allen



On Thu, 20 Jul, 2023 at 3:01 PM, at-request at lists.antique-tractor.com <at-request at lists.antique-tractor.com> wrote:


Message: 4
Date: Thu, 20 Jul 2023 12:40:37 -0400
From: "Dean Vinson" <dean at vinsonfarm.net<mailto:dean at vinsonfarm.net>>
To: "'Antique Tractor Email Discussion Group'"
<at at lists.antique-tractor.com<mailto:at at lists.antique-tractor.com>>
Subject: Re: [AT] A Good Tractor Evening
Message-ID: <001601d9bb28$e9b48c70$bd1da550$@vinsonfarm.net<http://vinsonfarm.net>>
Content-Type: text/plain; charset="utf-8"

Good story, Steve.  It?s been a long time since I?ve made the effort and gotten my hands dirty on a job like that,  but your description makes me want to go tinker with something.   Especially the part where you?re victorious at the end of the story.  :)



I do have a couple of long-simmering things I could mess with.   The JD 620 has a wire disconnected from the coil, been like that for years and the tractor runs fine and I haven?t noticed anything not working, but obviously the wire is there for some purpose so it?s on my list of stuff to get around to at some point.   And I need to take the Super M clutch pedal off and have a bushing inserted to rebuild the out-of-round hole where the pedal rotates about the shaft.   The local Case/IH dealer put a new shaft in for me several months ago while the tractor was in their shop for another issue anyway, and that fixed a lot but not all of the side-to-side play in the clutch pedal.   Either of those would presumably be pretty straightforward tasks, well suited to patient application of basic investigation and simple tools and without requiring much serious mechanic skill.



The Ford 3600 also just popped up with another issue, this time with the two-stage clutch.   I just recently got the tractor back from the shop after it had developed a fuel line leak, and it runs like a top, but after some hours of heavy brush-hogging last Saturday it now won?t let me engage the PTO.   With the two-stage clutch you push partway down to shift the transmission and all the way down to engage the PTO, and it?s always worked fine before, but now when I push the clutch all the way in I can?t engage the PTO? it just grinds.   I don?t have a good mental picture of exactly how a two-stage clutch works but I assume something stuck together while I was doing all that mowing the other day, or maybe got worn to the point where it needs readjustment or replacement, but either way I think the diagnosis and repair would be beyond my ?simple tools and without much serious skill? rule.   So it?ll be back to the shop for this little beast.



As a workaround in the meantime I can still use the PTO if I just shut the engine off before engaging it and then start back up, and I did that once already, but as I think about it I suspect it?s not a good idea for regular use.   Starting the engine with the PTO engaged and a brush hog attached to the PTO would mean the starter and ring gear have to overcome the inertia of the mower blades, correct?   The tractor starts almost instantly upon cranking it, but still, seems like I?d be asking for trouble if I use that procedure very much.



Dean Vinson

Saint Paris, Ohio
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