Pto pump shaking badly? Why

[Daren Todd]

Post a photo of the impeller so I can see what it looks like.

Does the pump sound like it's pumping rocks??? If so... that's a sign of cavitation (turbulence?.

Either your not getting enough water into the pump, or a restriction.

Post a photo of the cover you took off as well. Of the side that meets the impeller.

 

[Shadow_storm56]

that's my guess as well... need to know make/model info to see online drawing of how it's made but a stuck vane or two ,especially side by side will really shake a pump.

 

[Shadow_storm56]

Post a photo of the impeller so I can see what it looks like.

Does the pump sound like it's pumping rocks??? If so... that's a sign of cavitation (turbulence?.

Either your not getting enough water into the pump, or a restriction.

Post a photo of the cover you took off as well. Of the side that meets the impeller.

No odd sounds

 

[Shadow_storm56]

No odd sounds

So here's normal amount of shake vs this thing going shaking wild.

To those just joining it's not the PTO or PTO Angle or anything this did this when it was in cart mode too and pto mount was attempting to make it less bad.

 

[Daren Todd]

No odd sounds

I circled the top portion of your photo. Is that a plug or something you can remove to look down inside the volute/ impeller vanes??

Based on your two videos, I think your getting cavitation in there. I'm not hearing the tell tail sign of pumping marbles, but with all the vibration and bouncing, I think one or more of the vanes on that impeller are plugged.

 

[Daren Todd]

 

[Shadow_storm56]

I circled the top portion of your photo. Is that a plug or something you can remove to look down inside the volute/ impeller vanes??

Based on your two videos, I think your getting cavitation in there. I'm not hearing the tell tail sign of pumping marbles, but with all the vibration and bouncing, I think one or more of the vanes on that impeller are plugged.

I can look in through the side outlet. I can get a wire through each slot though

 

[Shadow_storm56]

Could try that plug it may be sized.

 

[Daren Todd]

I can look in through the side outlet. I can get a wire through each slot though

Then It's probably some internal issue then.

Bent shaft, bad bearing, or it just rattles like the dickins and there ain't nothing wrong with it.

 

[Shadow_storm56]

Then It's probably some internal issue then.

Bent shaft, bad bearing, or it just rattles like the dickins and there ain't nothing wrong with it.

Like I said when It's empty it dosen't even vibrate it's only once it's pumping. I wish I knew how to pull the impeller.

 

[Daren Todd]

.

Like I said when It's empty it dosen't even vibrate it's only once it's pumping. I wish I knew how to pull the impeller.

Is that the whole impeller visible in the opening of the volute? If so, un-bolt the other side of the volute and remove it.

Then to determine whether the impeller slides on, or threads onto the shaft.

Looking at the parts I could find via Google, it looks like the impeller presses onto the shaft. And then a nut on the end of the impeller to lock it into place.

So i'm leaning towards the impeller being pressed onto the shaft.

If that is the case, then you can use either a large gear puller to pull the impeller off. You need to make sure and take steps to preserve the threaded portion of the shaft.

Or you can use some tapered splitting wedges and a hammer. Tap the wedges between the impeller and the case to press the impeller off.

Now..... depending on how old the pump is, and whether or not anti-seize was applied to the shaft before the impeller was installed. The impeller and the shaft are probably bonded at this point.

So plan on inventing many new cuss words when trying to remove it.

I've had some that I've had to use a combination of the larg gear puller, putting the impeller under pressure, and then tapping in splitting wedges behind it.

I searched, but haven't been able to find a photo of the impeller.

If it threads onto the shaft, then lock the shaft on the pto side, and use a rock bar to unscrew the impeller.

That can be a bugger as well. I had one being stubborn yesterday.

I had to slide the handle to my 3ft rigid steel pipe wrench into the impeller, and then use a crane to pry up on the pipe wrench to get it to spin loose. This was while the pump end was still bolted to the diesel engine and trailer frame.

I'm pretty positive though that yours is pressed onto the shaft though.

 

[Shadow_storm56]

.

Is that the whole impeller visible in the opening of the volute? If so, un-bolt the other side of the volute and remove it.

Then to determine whether the impeller slides on, or threads onto the shaft.

Looking at the parts I could find via Google, it looks like the impeller presses onto the shaft. And then a nut on the end of the impeller to lock it into place.

So i'm leaning towards the impeller being pressed onto the shaft.

If that is the case, then you can use either a large gear puller to pull the impeller off. You need to make sure and take steps to preserve the threaded portion of the shaft.

Or you can use some tapered splitting wedges and a hammer. Tap the wedges between the impeller and the case to press the impeller off.

Now..... depending on how old the pump is, and whether or not anti-seize was applied to the shaft before the impeller was installed. The impeller and the shaft are probably bonded at this point.

So plan on inventing many new cuss words when trying to remove it.

I've had some that I've had to use a combination of the larg gear puller, putting the impeller under pressure, and then tapping in splitting wedges behind it.

I searched, but haven't been able to find a photo of the impeller.

If it threads onto the shaft, then lock the shaft on the pto side, and use a rock bar to unscrew the impeller.

That can be a bugger as well. I had one being stubborn yesterday.

I had to slide the handle to my 3ft rigid steel pipe wrench into the impeller, and then use a crane to pry up on the pipe wrench to get it to spin loose. This was while the pump end was still bolted to the diesel engine and trailer frame.

I'm pretty positive though that yours is pressed onto the shaft though.

Got it, rock in there

 

[Shadow_storm56]

Got it, rock in there

Also I assume it's by design but there's this weird groove that's not the whole way around too

 

[Shadow_storm56]

Wish I could find a new impeller honestly

 

[Daren Todd]

I wouldn't begin to know where to get an impeller for it. The parts site I found showed the impeller out of stock.

Might be worth it though to take the impeller to a machine shop and have them check it for balance before reinstalling it. Of course, thats after you remove the rock from it.

As far as the wear marks go..... I have know idea without seeing a photo of another impeller.

This is where i found the parts for it.

Bauer Famos IV 80 pump parts | Irrigationparts.eu

www.irrigationparts.eu

Edit: looking back through the parts, it does show an impeller available on page 3 I wonder if one's stainless and the other is cast iron.

 

[Shadow_storm56]

I wouldn't begin to know where to get an impeller for it. The parts site I found showed the impeller out of stock.

Might be worth it though to take the impeller to a machine shop and have them check it for balance before reinstalling it. Of course, thats after you remove the rock from it.

As far as the wear marks go..... I have know idea without seeing a photo of another impeller.

This is where i found the parts for it.

Bauer Famos IV 80 pump parts | Irrigationparts.eu

www.irrigationparts.eu

Edit: looking back through the parts, it does show an impeller available on page 3 I wonder if one's stainless and the other is cast iron.

It makes pressure so maybe just balance it

 

[Russell King]

Also I assume it's by design but there's this weird groove that's not the whole way around too

To me it looks like the impeller has been rubbing on the case and has worn down the impeller. That rub would certainly create vibration. I circled what I think you are talking about in red.

Look in the case if you can and see if there is evidence of a rub on one part of the case.

I think that would be from a failed bearing or two letting the impeller hit the case. Are you replacing the bearings?

 

[Shadow_storm56]

To me it looks like the impeller has been rubbing on the case and has worn down the impeller. That rub would certainly create vibration. I circled what I think you are talking about in red.

Look in the case if you can and see if there is evidence of a rub on one part of the case.
View attachment 161118
I think that would be from a failed bearing or two letting the impeller hit the case. Are you replacing the bearings?

Hadn't planned to theres no play or movement in the bearings and the seals are good. There's no signs of wear on the casing.

 

[Shadow_storm56]

To me it looks like the impeller has been rubbing on the case and has worn down the impeller. That rub would certainly create vibration. I circled what I think you are talking about in red.

Look in the case if you can and see if there is evidence of a rub on one part of the case.
View attachment 161118
I think that would be from a failed bearing or two letting the impeller hit the case. Are you replacing the bearings?

I took it to the machine shop nearby they work with alot of pumps. He said that grove is likely a bearing failed and someone fixed the bearing but didn't fix the damage. I figured I'll have it balanced while it's out. The wear ring is most important and that's still good.