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D2 pivot shaft

D2 pivot shaft

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Tad7561
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Hey everyone, decided its about time to start my D2. I looked through the archives about the pivot shafts, but can't seem to find the new or not completely worn dimensions of the shaft. I have a parts machine I can take from. But I wanna make sure it's in good shape, and not close to being completely worn. The left track is getting really close to smashing the side panel.
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Sun, Apr 20, 2014 6:21 AM
Tad7561
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Here are some pics for enjoyment, any help would still be appreciated 😆 like how to get the shaft out to, and what needs to come off. Thanks guys [attachment=22871]image.jpg[/attachment][attachment=22870]image.jpg[/attachment]
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Tue, Apr 22, 2014 12:05 AM
drujinin
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Reply to Tad7561:
Here are some pics for enjoyment, any help would still be appreciated 😆 like how to get the shaft out to, and what needs to come off. Thanks guys [attachment=22871]image.jpg[/attachment][attachment=22870]image.jpg[/attachment]
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to get that shaft out is to crawl under with a big socket set and a 6 foot cheater bar.
Locate the 2 caps that clamp it to the transmission, loosen them with listed tools.
Remove the little retainer wedge above the main spring.
Take the Track off, either by loosening it a lot to get it off whole or open the Master Link.
Then jack/block up the machine to get the leaf spring off the frame, not too high or it works against you.
Take off the rear roller near the sprocket.
Proceed to remove the locking caps on the end of the pivot shaft on both sides of the tractor.
Now figure out the balance point of the frame and lift and slide it off the shaft!
Cuss yourself for not figuring out which was wore more or bent wishing you had taken that one off first!
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Tue, Apr 22, 2014 12:54 AM
Gary Morisoli
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Reply to drujinin:
to get that shaft out is to crawl under with a big socket set and a 6 foot cheater bar.
Locate the 2 caps that clamp it to the transmission, loosen them with listed tools.
Remove the little retainer wedge above the main spring.
Take the Track off, either by loosening it a lot to get it off whole or open the Master Link.
Then jack/block up the machine to get the leaf spring off the frame, not too high or it works against you.
Take off the rear roller near the sprocket.
Proceed to remove the locking caps on the end of the pivot shaft on both sides of the tractor.
Now figure out the balance point of the frame and lift and slide it off the shaft!
Cuss yourself for not figuring out which was wore more or bent wishing you had taken that one off first!
I posted these pictures a few years ago but thought it was worth a repost. No one got hurt. You may be able to see the caps that need to be removed.

Gary
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Tue, Apr 22, 2014 2:38 AM
Gregness
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Reply to Gary Morisoli:
I posted these pictures a few years ago but thought it was worth a repost. No one got hurt. You may be able to see the caps that need to be removed.

Gary
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I must be a moron. I am looking at the relationship between the final drive output shaft and the "Pivot shaft", and I am not seeing how the machine can "pivot" around the pivot shaft very much- the relationship between the track roller assembly and the rest of the machine seems defined by the line you could draw through the center of the drive sprocket and the center of the pivot shaft. What am I missing here?

G
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Wed, Apr 23, 2014 2:04 AM
Gregness
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Reply to Gregness:
I must be a moron. I am looking at the relationship between the final drive output shaft and the "Pivot shaft", and I am not seeing how the machine can "pivot" around the pivot shaft very much- the relationship between the track roller assembly and the rest of the machine seems defined by the line you could draw through the center of the drive sprocket and the center of the pivot shaft. What am I missing here?

G
[quote="Gregness"]I must be a moron. I am looking at the relationship between the final drive output shaft and the "Pivot shaft", and I am not seeing how the machine can "pivot" around the pivot shaft very much- the relationship between the track roller assembly and the rest of the machine seems defined by the line you could draw through the center of the drive sprocket and the center of the pivot shaft. What am I missing here?

G[/quote]

Never mind. I drew a picture and figured it out. The track pivots like the swing-arm on a motorcycle, allowing the track roller frame to rotate on a separate axis than the sprocket. The spring-tensioned chain can shrink or expand a bit to handle the implied changes in total chain length definition. I think.

G
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Wed, Apr 23, 2014 2:47 AM
chriscokid
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Reply to Gregness:
[quote="Gregness"]I must be a moron. I am looking at the relationship between the final drive output shaft and the "Pivot shaft", and I am not seeing how the machine can "pivot" around the pivot shaft very much- the relationship between the track roller assembly and the rest of the machine seems defined by the line you could draw through the center of the drive sprocket and the center of the pivot shaft. What am I missing here?

G[/quote]

Never mind. I drew a picture and figured it out. The track pivots like the swing-arm on a motorcycle, allowing the track roller frame to rotate on a separate axis than the sprocket. The spring-tensioned chain can shrink or expand a bit to handle the implied changes in total chain length definition. I think.

G
here is when i worked on mine, i still have pics if needed: http://www.acmoc.org/bb/showthread.php?8817-Working-on-a-D2-3J-Pivot-Shaft-and-undercarriage
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Wed, Apr 23, 2014 3:59 AM
cojhl2
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Location: SE WA, and Colorado Springs
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Reply to Gregness:
[quote="Gregness"]I must be a moron. I am looking at the relationship between the final drive output shaft and the "Pivot shaft", and I am not seeing how the machine can "pivot" around the pivot shaft very much- the relationship between the track roller assembly and the rest of the machine seems defined by the line you could draw through the center of the drive sprocket and the center of the pivot shaft. What am I missing here?

G[/quote]

Never mind. I drew a picture and figured it out. The track pivots like the swing-arm on a motorcycle, allowing the track roller frame to rotate on a separate axis than the sprocket. The spring-tensioned chain can shrink or expand a bit to handle the implied changes in total chain length definition. I think.

G
[quote="Gregness"]Never mind. I drew a picture and figured it out. The track pivots like the swing-arm on a motorcycle, allowing the track roller frame to rotate on a separate axis than the sprocket. The spring-tensioned chain can shrink or expand a bit to handle the implied changes in total chain length definition. I think.

G[/quote]

A short note, the spring does not act like a tightener, it is only there to allow the idler to slide back in case something gets caught in the rails.

However your observation is correct Gregness, since the center of rotation is slightly off there is a change in rail slack as the track pivots. If you look at the angle though is is ever so slight.
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Thu, Apr 24, 2014 10:52 AM
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