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Coke 
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Joined: 30 Sep 2018
Location: MIdwest
Points: 215
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 Topic: PTO issue
Posted: 20 May 2022 at 12:36pm |
Is anyone familiar with this type of PTO connection?
Mine won't seem to stay locked on the PTO shaft anymore, is the pin running throughmeant to lock it into the groove on the splined shaft, or is there some other mechanism I'm just not seeing?
Thanks in advance.
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1957 D17 Diesel w/ M&W Pistons
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8070nc
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Joined: 21 Mar 2019
Location: North Carolina
Points: 515
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Posted: 20 May 2022 at 12:58pm |
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If I had to guess Id say the spring on the pin you push to connect or disconnect is broke or weak
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1984 80780
1957 D14
DES 300 with 25000 engine
616 tractor
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Allis dave
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Joined: 10 May 2012
Location: Northern IN
Points: 2924
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Posted: 20 May 2022 at 1:08pm |
The Pin on the end of the PTO shaft has a spring around it on the inside of the shaft. When you press the pin, you overcome the force of the spring and a narrower part of the pin opens up and allows the PTO shaft to slide over the tractor PTO splines. When you stop pressing on the pin the spring pressure should pop it back and the wider part of the pin fits into the groove and locks it on the tractor PTO.
Sometimes the spring get weak and needs replaces. Other times it just gets rusty in there and spraying it with some penetrating oil and working the pin back and forth will free it up
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steve(ill)
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Joined: 11 Sep 2009
Location: illinois
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Posted: 20 May 2022 at 1:35pm |
soak the pin with penetrant and push it from the LEFT .( tap it with a hammer).. IN/ OUT a couple dozen times... When you PUSH IN and let go, it should POP back out.
Edited by steve(ill) - 20 May 2022 at 1:40pm
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Like them all, but love the "B"s.
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Tbone95
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Joined: 31 Aug 2012
Location: Michigan
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Posted: 20 May 2022 at 1:50pm |
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And....if the spring is toast and it won't come back, you pull it out with your fingers once it's in the groove.......probably not the safest or best advice, but been there.
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shameless dude
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Joined: 10 Apr 2017
Location: east NE
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Posted: 20 May 2022 at 3:55pm |
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are you sure you are sliding the connector all the way on? it appears in the pics that you are sliding it on until it stops, that would be the area where that sliding pin is. depress that pin, slide the connector on until the pin slides back again. clean off you PTO shaft and put some oil on it, depress that pin and slide it all the way on to the tractor, then slide it back. oil on both is your friend. even the slide pin.
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DiyDave
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Joined: 11 Sep 2009
Location: Gambrills, MD
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Posted: 20 May 2022 at 6:25pm |
If you take a big pair o channel locks, and squeeze that circlip, so that the open side opens up, the circlip is removed, then slide the whole shebang out the button side, the inner workins and mysteries will be revealed to you. Last time I bought one it was about a $3 part, but you never know, with the inflation thingy. They do come in several different sizes, so take the old one with you to your dealer or farm store. If its TSC, I bet they will have the sizes you DON'T need! 
PS, take the old one out, clean it, then lay it on a piece of steel, and roll it! If its bent, its toast...
Edited by DiyDave - 20 May 2022 at 6:27pm
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DougG
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Joined: 20 Sep 2009
Location: Mo
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Posted: 20 May 2022 at 6:45pm |
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Those can be bought new at any farm dealer or store
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MACK
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Joined: 17 Nov 2009
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Posted: 20 May 2022 at 8:56pm |
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One picture shows ware on shaft where keeper pin is wareing on shaft. PTO may not be telescoping free or bottoms out when you turn or cross a ditch. MACK
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AC720Man
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Joined: 10 Oct 2016
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Posted: 20 May 2022 at 10:01pm |
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I had that issue, disassembled mine and the spring was broken. New spring resolved the issue. As others said you may be able to disassemble, clean, oil it, and be good to go. Dirt definitely will cause a issue and it could be that simple.
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1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD
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DiyDave
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Posted: 21 May 2022 at 4:53am |
 MACK wrote:
One picture shows ware on shaft where keeper pin is wareing on shaft. PTO may not be telescoping free or bottoms out when you turn or cross a ditch. MACK |
Absolutely right! If it won't telescope, it bends the pin! 
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Coke
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Joined: 30 Sep 2018
Location: MIdwest
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Posted: 22 May 2022 at 3:20pm |
OK, it would appear everybody is right.
- The spring is weak
- The pin is bent
- The PTO shaft needs greased as it has a sticky section
So I was at my local farm store earlier (before I took off the clip, cart before horse) playing with PTO shafts to get an idea of how they were supposed to work, now I'll need to go back, or order, a 9/16x3.5" pin.
For whoever said I wasn't sliding it on far enough, I had it all the way to the plate on the back of the tractor, I think either at that point the pin had slid out of locking position, or it's just too damn worn. I'm hoping just a new pin and a well greased PTO shaft will give it enough of a bite to stay on, I'm wondering if it's only been friction and the fact the shaft was fairly well greased, that's been keeping it on up to now, because that button has never bounced, I never even realized there was a spring in there until I took the clip off and took it out.
Hoping the shaft isn't too worn as well.
Thanks folks. 
Edited by Coke - 22 May 2022 at 10:14pm
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1957 D17 Diesel w/ M&W Pistons
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