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post #16 of 33 Old 04-01-2019, 09:00 AM
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Re: x720 - Why does my snow blower keep bending the PTO bracket?

Quote:
Originally Posted by embo View Post
Well, that could very well be, though it ran VERY smooth and solid with the new bracket in November. I'm going to try to look today or tomorrow and post pics for you guys. Given all of this excellent feedback from everyone, I'm starting to lean towards the hydraulic cylinder simply lifting too far and bending the bracket by putting too much pressure on the driveshaft. That COULD be only if it's in a certain position rotation-wise, where the knuckles on the drive shaft don't bend quite right, or I'm sure it's possible that the steering is hitting the driveshaft and bending it that way as well. I'm going to post pics of that area as well and look for wear. My biggest question would be...if it is, in fact, either one of those causes, how do you even stop it from happening? Maybe a stop collar on the hydro, but if it's steering, then it will be more challenging.

I've got the mower on now, so the pics won't be quite as helpful, but I'll see what I can find out and get back to this thread, and if nothing else we may get to pick this saga up again in the Fall.
Just need a pic of the blower. Also need to look at the manual for the PTO shaft install. Specifically states to rotate handle and make sure it is locked when you insert shaft into the bracket that is bent. For the bracket to bend like that, the PTO shaft is rotating out of the bracket.
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JD 455 3pt, rear pto, Ruegg drawbar, QH, 47 2S blower, 54 deck
JD 455 3 pt rear pto 60 deck
JD 445 54 deck
JD 425, 54 deck, 450 tiller, 3pt, rear pto
JD 332, 3pt, 50 deck, 47 2S fridge blower
JD 316, 46 deck

JD 955 70A loader, 59" snowblower, 60 deck

3 x JD 455 parts tractors w/3 60" decks
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post #17 of 33 Old 04-01-2019, 09:15 AM Thread Starter
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Re: x720 - Why does my snow blower keep bending the PTO bracket?

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Originally Posted by pipsqueek View Post
Just need a pic of the blower. Also need to look at the manual for the PTO shaft install. Specifically states to rotate handle and make sure it is locked when you insert shaft into the bracket that is bent. For the bracket to bend like that, the PTO shaft is rotating out of the bracket.
I usually check the handle to make sure it's solid (at least, that's what I recall), but maybe the spring loaded yellow lock thing on the bracket needs to be tighter. I'll get pics soon.
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post #18 of 33 Old 04-01-2019, 09:29 AM
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Re: x720 - Why does my snow blower keep bending the PTO bracket?

Was the PTO shaft out of the bracket when you removed the snowblower to install mower?

JD 455 3pt, rear pto, Ruegg drawbar, QH, 47 2S blower, 54 deck
JD 455 3 pt rear pto 60 deck
JD 445 54 deck
JD 425, 54 deck, 450 tiller, 3pt, rear pto
JD 332, 3pt, 50 deck, 47 2S fridge blower
JD 316, 46 deck

JD 955 70A loader, 59" snowblower, 60 deck

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post #19 of 33 Old 04-01-2019, 09:39 AM
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Re: x720 - Why does my snow blower keep bending the PTO bracket?

From the looks of the picture posted by pipsqueek if it is indeed the OP's tractor that quick hitch is from a 4X5 series tractor which will work but you should post some pictures of the quick hitch as well.


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post #20 of 33 Old 04-01-2019, 09:40 AM Thread Starter
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Re: x720 - Why does my snow blower keep bending the PTO bracket?

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Was the PTO shaft out of the bracket when you removed the snowblower to install mower?
Nope. It was in the bracket, but just a bit loose due to the bending.
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post #21 of 33 Old 04-01-2019, 09:41 AM Thread Starter
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Re: x720 - Why does my snow blower keep bending the PTO bracket?

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From the looks of the picture posted by pipsqueek if it is indeed the OP's tractor that quick hitch is from a 4X5 series tractor which will work but you should post some pictures of the quick hitch as well.
This is interesting...are they different parts for the 4x5 vs the x7 series? Typically a lot of stuff I've seen works for both, but it wouldn't surprise me if they had something slightly different for this.
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post #22 of 33 Old 04-01-2019, 09:50 AM
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Re: x720 - Why does my snow blower keep bending the PTO bracket?

The driveshaft length is different between the 4X5 machine and the X's. The 4X5 machine driveshaft is shorter. So depending on what someone did for the driveshaft it could be either too long or short of any combination. Something is wrong.


2003 John Deere X485
45 FEL w/ custom quick tach sliding forks
647 tiller
54c deck w/ mulch kit and power flow bagger
OTC weather enclosure w/ heat, glass, wiper, lights
Quick tach model 50 snowthrower w/ long chute
Custom 52" quick tach front blade
Modified foam filled turfs off a 400 (183# each)
75# wheel weights and chains
John Deere 40" Front Mount Thatcher w/hydraulic lift
John Deere 14SB
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post #23 of 33 Old 04-01-2019, 10:02 AM
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Re: x720 - Why does my snow blower keep bending the PTO bracket?

MTF member x720 with 455 quick hitch and wrong driveshaft.

https://www.mytractorforum.com/12-jo...aft-issue.html

JD 455 3pt, rear pto, Ruegg drawbar, QH, 47 2S blower, 54 deck
JD 455 3 pt rear pto 60 deck
JD 445 54 deck
JD 425, 54 deck, 450 tiller, 3pt, rear pto
JD 332, 3pt, 50 deck, 47 2S fridge blower
JD 316, 46 deck

JD 955 70A loader, 59" snowblower, 60 deck

3 x JD 455 parts tractors w/3 60" decks
JD 425 parts tractor

Cockshutt 1465 Fiat Diesel 77HP, Loader,
Cockshutt 1465 parts tractor

Last edited by pipsqueek; 04-01-2019 at 10:11 AM.
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post #24 of 33 Old 04-01-2019, 06:02 PM Thread Starter
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Re: x720 - Why does my snow blower keep bending the PTO bracket?

Alright folks, I have PICTURES! I am going to post the link to the Imgur album, but if you guys would rather I post them inline, I can do that as well.

Here's the full album: https://imgur.com/a/HP4CIFK Please let me know if this helps or if anyone wants to see a different pic or different angle.

Thank you all so much for the help so far. I know we can get this figured out.
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post #25 of 33 Old 04-01-2019, 06:06 PM Thread Starter
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Re: x720 - Why does my snow blower keep bending the PTO bracket?

One thing I did notice...on the locking collar on the long drive shaft...there is only ONE set screw in there, but it looks like there is a hole for another. I need to fix that. I wouldn't think that would cause this, but I wanted to mention it in case anyone thinks it would be an issue.
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post #26 of 33 Old 04-01-2019, 08:06 PM
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Re: x720 - Why does my snow blower keep bending the PTO bracket?

Quote:
Originally Posted by embo View Post
Alright folks, I have PICTURES! I am going to post the link to the Imgur album, but if you guys would rather I post them inline, I can do that as well.

Here's the full album: https://imgur.com/a/HP4CIFK Please let me know if this helps or if anyone wants to see a different pic or different angle.

Thank you all so much for the help so far. I know we can get this figured out.
Same general configuration as my son’s X730, but ....
- There appears to be wear in two spots on the shaft bracket that are opposite each other. When the blower is raised, the shaft isn’t straight with the U-joints which causes oscillation. If the U-joint is worn, there may be too much shaking causing the bracket to be worked by the shaft bracket. At 2000 rpm, it won’t take long. I’m thinking there may be some wear in the U-joints.
- There is wear on the one head of the locking button that is likely because the bracket started to bend open and started to lose retention.
- There appears to be a number on the shaft bracket that I can’t read. Perhaps find out what it is and see if it’s the right one for your tractor.

Have you talked with your local dealer?

JD 2014 X738; 25.5 hp; HDAP tires; 54” deck auto-connect; hyd. angle quick hitch;
adapted to Cyclone Rake Commander Pro; 54” snowblower; front PTO kit; LP41114 Enclosure; LED lighting; 54” blade; 125# mounted spreader; 10P cart

Scotts 2002 L17.542 17.5 hp; 42" w/bagger
Sold Husqvarna 2010 GTH27V52LS w/52" fab deck
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post #27 of 33 Old 04-01-2019, 08:50 PM Thread Starter
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Re: x720 - Why does my snow blower keep bending the PTO bracket?

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Originally Posted by RT3360 View Post
Same general configuration as my son’s X730, but ....
- There appears to be wear in two spots on the shaft bracket that are opposite each other. When the blower is raised, the shaft isn’t straight with the U-joints which causes oscillation. If the U-joint is worn, there may be too much shaking causing the bracket to be worked by the shaft bracket. At 2000 rpm, it won’t take long. I’m thinking there may be some wear in the U-joints.
- There is wear on the one head of the locking button that is likely because the bracket started to bend open and started to lose retention.
- There appears to be a number on the shaft bracket that I can’t read. Perhaps find out what it is and see if it’s the right one for your tractor.

Have you talked with your local dealer?
I haven't talked to the dealer yet beyond ordering the new bracket (because I thought it would cure it), but this is something I hadn't considered...if there's an imbalance in the shaft, you're right, at 2,000 RPM, that thing could easily vibrate enough over time to bend that bracket like this. U-joints are another great idea...I think they're alright, but I'll check them again soon. I'm actually really wondering about the shaft balance though. That is a definite possibility.

When you say "there is wear on the one head of the locking button", what do you mean by that? Do you mean the yellow retainer spring/clip that is on the bracket, or are you talking about some other part?
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post #28 of 33 Old 04-01-2019, 09:58 PM
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Re: x720 - Why does my snow blower keep bending the PTO bracket?

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Originally Posted by embo View Post
I haven't talked to the dealer yet beyond ordering the new bracket (because I thought it would cure it), but this is something I hadn't considered...if there's an imbalance in the shaft, you're right, at 2,000 RPM, that thing could easily vibrate enough over time to bend that bracket like this. U-joints are another great idea...I think they're alright, but I'll check them again soon. I'm actually really wondering about the shaft balance though. That is a definite possibility.

When you say "there is wear on the one head of the locking button", what do you mean by that? Do you mean the yellow retainer spring/clip that is on the bracket, or are you talking about some other part?
Sorry, wrong term. Should have said “shoulder bolt”, item E in post 16 attachment. It looks like the heads of both shoulder bolts show signs of wear, which would certainly be the case when the head was no longer engaging the bracket because of the bending. You might want to lay the shaft on a flat table and roll it to see if it is bent. If not and you replace the bracket again, I would definitely check for vibration when running, with the blower down and raised. Also check to see how tight the U-joint is when the locking collar is engaged in the lock position. There shouldn’t be much if any movement.

Hope this helps.
Bob

JD 2014 X738; 25.5 hp; HDAP tires; 54” deck auto-connect; hyd. angle quick hitch;
adapted to Cyclone Rake Commander Pro; 54” snowblower; front PTO kit; LP41114 Enclosure; LED lighting; 54” blade; 125# mounted spreader; 10P cart

Scotts 2002 L17.542 17.5 hp; 42" w/bagger
Sold Husqvarna 2010 GTH27V52LS w/52" fab deck
Craftsman DLT2000, 48”
Ariens ST824 snowblower
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post #29 of 33 Old 04-02-2019, 08:08 AM
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Re: x720 - Why does my snow blower keep bending the PTO bracket?

Is it a struggle at all to hook up the driveshaft from the blower to the tractor? That driveshaft looks really short.


2003 John Deere X485
45 FEL w/ custom quick tach sliding forks
647 tiller
54c deck w/ mulch kit and power flow bagger
OTC weather enclosure w/ heat, glass, wiper, lights
Quick tach model 50 snowthrower w/ long chute
Custom 52" quick tach front blade
Modified foam filled turfs off a 400 (183# each)
75# wheel weights and chains
John Deere 40" Front Mount Thatcher w/hydraulic lift
John Deere 14SB
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post #30 of 33 Old 04-04-2019, 05:40 PM
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Re: x720 - Why does my snow blower keep bending the PTO bracket?

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One thing I did notice...on the locking collar on the long drive shaft...there is only ONE set screw in there, but it looks like there is a hole for another. I need to fix that. I wouldn't think that would cause this, but I wanted to mention it in case anyone thinks it would be an issue.
I have a couple thoughts for you. First, if you have a self-aligning bearing with a lock collar, generally it only uses one set screw. The other hole will not have threads and is used to rotate the lock collar with a hammer and punch, in the direction of shaft rotation, to "LOCK" the inner bearing race to the shaft. And of course to loosen the lock collar by turning in the opposite with hammer and punch, for bearing removal. Second, I looked for damage or scuffing in all your pictures where your drive shaft could be making contact with the frame or axle and did not see anything that would have force enough to bend that bracket. I also do not suspect vibration from an out-of-balance shaft. If a shaft was that far out it should be shaking the entire tractor to pieces. I do have a suspicion however. If you get a chance to move heavy wet snow, can slushy wt snow build up between the lift bracket and the shaft and freeze there? And then, when the blower is lifted, the clearance is diminished and the shaft is forced upward bending that bracket. Then, when you clean it out, or park it in your heated garage, all evidence of the culprit is erased.

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