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-   -   PTO won't disengage (https://www.onlycubcadets.net/forum/showthread.php?t=45464)

mortten 08-16-2016 03:06 PM

PTO won't disengage
 
Rebuilt the PTO on my 122. New disc, bearing, button, and a brass button on the arm. It won't disengage. What did I do wrong?

Yosemite Sam 08-16-2016 03:18 PM

Did you put a new spring in it?

mortten 08-16-2016 03:23 PM

Yes new spring

Yosemite Sam 08-16-2016 03:31 PM

My best guess is that you have it too tight, but without seeing it I don't know that for sure.

There should be a little air space between the buttons when it's engaged, and when you pull the lever back you should be able to turn the pulley (engine off) with your hand.

If you don't have a deck or other belt driven attachment hooked up, the pulley will turn with the engine no matter what.

mortten 08-16-2016 05:27 PM

Have 1/64" between the buttons. Can't turn it by hand when the lever is back. Do you mean I have the bolts tightened too much? I used a gauge. Guess I'll pull it off and see what's up.

Yosemite Sam 08-16-2016 05:35 PM

Just to confirm the 1/64" is with the handle forward?

You might try folding some cardboard (cereal or shoe box type) and put it between the buttons and pull the lever back (gently) to see if the pulley will turn then. Just to see if you're close or not.

If not then you may have to take it back apart.

mortten 08-16-2016 05:51 PM

Lever forward. With a double thicknes of a Kleenex box I can turn the pulley if I hold the starter generator belt.

Yosemite Sam 08-16-2016 06:12 PM

Quote:

Originally Posted by mortten (Post 387568)
Do you mean I have the bolts tightened too much?

Yeah, unless the casting and plate are terrible rusty, it sounds like you have it a little tight.

Keep in mind, when you put it back together you don't necessarily need to tighten the set screws. You can just slip it on the bearing, reattach the lever, pull it back and see if the pulley turns. Just make sure it is all the way on the bearing. This just makes the process a little easier if you have to do it a couple of times.

Once you feel confident that everything is as it should be, then tighten the set screws down.

Good Luck

drglinski 08-16-2016 06:13 PM

Are you trying to disengage it with a belt driven implement on? A mechanical PTO won't disengage w/o resistance of a mower/tiller/thrower, etc.

mortten 08-16-2016 06:26 PM

Plates were both cleaned up. It has a mower on it.

Yosemite Sam 08-16-2016 07:47 PM

Quote:

Originally Posted by Yosemite Sam (Post 387572)
Keep in mind, when you put it back together you don't necessarily need to tighten the set screws. You can just slip it on the bearing, reattach the lever, pull it back and see if the pulley turns.

You don't want to do this if the belt is on it.

dale c. 08-16-2016 10:15 PM

the bearing might be on the crank too far and when you release the clutch the spring will hit the end of the crank

Billy-O 08-16-2016 10:35 PM

Some other thoughts comes to mind........Bearing could be frozen/seized. Or bearing might not be "locked" on crank (What Dale mentions brings this to mind!)

mortten 08-16-2016 11:00 PM

Bearing is new and locked flush with the crank. Going to pull it in the morning

darkminion_17 08-16-2016 11:20 PM

Are you missing the snap ring on the clutch housing?

mortten 08-17-2016 08:22 AM

If I remember correctly the snap ring was there.

mortten 08-17-2016 09:03 AM

1 Attachment(s)
Here's a couple of pics. The snap ring is there. Double checking with the gauge in better light it looks like I've got the bolts a little too tight.

mortten 08-17-2016 09:05 AM

1 Attachment(s)
Second pic

Yosemite Sam 08-17-2016 11:38 AM

From the front it does look a little tight, but from the back it looks like just the one (closest to the camera) is too tight.

How about a picture of the end of the crank?

mortten 08-17-2016 12:46 PM

1 Attachment(s)
Here's a picture of the crank. The bearing is about 1/8" past being flush with the end. That's not how I remember leaving it. Maybe I didn't lock it down tight enough.

darryljs 08-17-2016 04:49 PM

Also, make sure you're using the right gauge. There are 2 different gauges for the different type of springs.

mortten 08-17-2016 05:47 PM

I have the single spring narrow frame gauge. I'm getting it back together now. We'll see how it goes

mortten 08-20-2016 07:31 PM

Ok guys got the PTO working. Took it apart and reset everything with the gauge and still too tight. Took it off again and set it by sight and feel. Put it back together and it works like it should. Ran it through some tall grass and no slip. It was just too tight using the gauge. Don't know why.


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