B7100 removing crankshaft pulley with PTO adapter

[WilGan]

Any advice on how to remove the crankshaft pulley/harmonic balancer? My manual does not describe it, and I would like to see a schematic before putting a puller on it.

 

[Russell King]

Here is one version of the B7100 From illustrated parts list at Kubota USA site (but it may not be your tractor). Under the DYNAMO SECTION for some odd reason).

Remove the bolts (blue), remove the PTO extension (yellow), then bend the lock plate out of the way (green), then loosen the nut and remove nut (red) and lock plate then pulley can be removed.

The PTO shaft is sometimes part of the crankshaft itself so that might be what you have???

 

[WilGan]

I thought this is what I have, there are three bolts which I removed, I tapped the PTO with a mallet, and it doesn't want to move. I will try again

 

[GreensvilleJay]

Hmm.....To get #29 off #10,use a putty knife between them and whack it a few times. Probably been on 'forever'...

 

[Russell King]

Not 100% sure but the crankshaft may extend into that removable shaft. At least the same illustrated parts list shows it extends

You may need to remove the hood and radiator to be able to get to the removable shaft better?

@North Idaho Wolfman may be along to give you experienced advice

 

[North Idaho Wolfman]

Not 100% sure but the crankshaft may extend into that removable shaft. At least the same illustrated parts list shows it extends
View attachment 164650
You may need to remove the hood and radiator to be able to get to the removable shaft better?

@North Idaho Wolfman may be along to give you experienced advice

Yes you nailed it, the adapter is hollow and the crank splines extends through it.
Use brake parts cleaner and clean the spline space before trying to remove it.

 

[WilGan]

Not sure, I've tried the putty knife, I'm trying not to have to make a special puller for it, but I may have too, unless someone gives me a new idea.....

 

[WilGan]

The inside of the removable shaft is hollow maybe a wheel puller against the back of the spline if I can get enough grip. I'll try that....

 

[Russell King]

Can you see down the center of the removable shaft? What is there? I assume you would be seeing the splines of the crankshaft extension.

I would spray that with a good penetrating oil like PB Blaster, Kroil, … and then rotate the engine if you can safely.

It looks like you have moved it out about a quarter inch from the pulley. Is that truly the case? If so I would spray the crankshaft extension with a good penetrating oil all around the shaft. Then let it sit for a while (overnight?). Then see if you can move it off any further. If not, then spray the crankshaft extension splines on both ends of the removable shaft and see if you can tap the removable shaft slightly towards the engine. Then see if you can get it to move back to where it was or further if possbile. If that works then try going back and forth with the removable shaft, hopefully getting it further off each time. Keep spraying both ends so the penetrating oil will be moved around with the removable shaft.

Good luck!

 

[North Idaho Wolfman]

Read post #6
You need to clean out the splines on the inside of the adapter to get it off.

 

[WilGan]

Can you see down the center of the removable shaft? What is there? I assume you would be seeing the splines of the crankshaft extension.

I would spray that with a good penetrating oil like PB Blaster, Kroil, … and then rotate the engine if you can safely.

It looks like you have moved it out about a quarter inch from the pulley. Is that truly the case? If so I would spray the crankshaft extension with a good penetrating oil all around the shaft. Then let it sit for a while (overnight?). Then see if you can move it off any further. If not, then spray the crankshaft extension splines on both ends of the removable shaft and see if you can tap the removable shaft slightly towards the engine. Then see if you can get it to move back to where it was or further if possbile. If that works then try going back and forth with the removable shaft, hopefully getting it further off each time. Keep spraying both ends so the penetrating oil will be moved around with the removable shaft.

Good luck!

No it has not moved much. maybe .01 at the most, it did/looks like it separated from the pulley, but not enough to get behind it, What you may be seeing that looks like it moved is the actual belt section of the pulley.

 

[Russell King]

No it has not moved much. maybe .01 at the most, it did/looks like it separated from the pulley, but not enough to get behind it, What you may be seeing that looks like it moved is the actual belt section of the pulley.

Oh now I can see that it has not moved much and that is the pulley groove I thought was open space.

As stated above you will need to really get the junction between the inner diameter of the removable shaft and the outer diameter of the crankshaft extension to be clean and some good penetrating oil into that area. I imagine that there is some rust that has basically glued the two parts together. Until you can break that up some, you have little chance of getting it off.

You might be able to machine some steel with a hole in the center that would be smaller than the splines on the removably shaft. Then split that through the diameter of the hole. Make that become the puller by clamping it together behind the splines and having a two or three jaw puller screw into the steel clamped part.

The problem you have is that the splines have a taper at the ends so no way will anything be able to hook onto the splines.

Did you remove the hood and radiator to gain good access? It looks like you have done that.

 

[whitetiger]

Blow out the inner area to clear the crankshaft spline, and spray penetrating oil inside the bore.
After it sets overnight, work the adapter around to free it.

 

[WilGan]

Blow out the inner area to clear the crankshaft spline, and spray penetrating oil inside the bore.
After it sets overnight, work the adapter around to free it.


View attachment 164783

I was finally able to work on this again and I had been soaking it for the past 8 months in my garage rotating it, I wire brushed the, tried a bearing puller clamping it behind the spline. Nothing worked. Then I took a gamble and figures out where the relief was on the balance pulley hub and drilled and tapped it in 3 places. then built a puller using a flat piece of 1/4 aluminum plate and (3) 3/16 bolts and the threaded section of a standard 3 prong puller. The torque was so high on the 5/8 push bolt on the pulley that it bent with heat applied to the PTO flange at the same time, hot enough that the end of the PTO started to turn red before it started to pull off. But I was able to remove it and replace the front main oil seal.

 

[North Idaho Wolfman]

I was finally able to work on this again and I had been soaking it for the past 8 months in my garage rotating it, I wire brushed the, tried a bearing puller clamping it behind the spline. Nothing worked. Then I took a gamble and figures out where the relief was on the balance pulley hub and drilled and tapped it in 3 places. then built a puller using a flat piece of 1/4 aluminum plate and (3) 3/16 bolts and the threaded section of a standard 3 prong puller. The torque was so high on the 5/8 push bolt on the pulley that it bent with heat applied to the PTO flange at the same time, hot enough that the end of the PTO started to turn red before it started to pull off. But I was able to remove it and replace the front main oil seal.

I've never had one on that tight, but 42 to 49 years and the right (wrong) conditions can make that happen.