Wallenstein B52S (Binacchi) PTO drive shaft attachment

[PETDOC]

When attaching the PTO drive shaft to my Kubota the locking pin, which has an external spring, pops up as soon as the collar reaches the narrowing in the PTO neck. On the end that attaches to the chipper the spring is obviously inside the collar, i.e., it is not visible, but you can feel it when compressing and releasing locking pin. When I slide that collar over the chipper spindle the pin stays ~90% depressed, i.e., never fully pops up. The spindle is fully inserted into the collar and to get the collar to detach I've had to use a C-clamp to fully depress locking pin and a crow bar to wedge the collar off.
Is the locking pin supposed to fully pop up when the collar to the chipper spindle is attached? If it doesn't fully pop up could that mean the collar is on too far?

 

[s219]

I like to see the lock pin definitely pop back up, but can't say if it comes all the way or not. But definitely check and double-check the connection. I always give it a good pull/jiggle to make sure it's not coming off. It's too easy to slide these guys on and not make a positive connection when it seems like you did. The connector should be able to slide on the shaft so that you can jiggle it back and forth to check that the pin is engaged. If not, I'd try to clean it up and lube it, and check for burrs/damage/etc that might cause it to stick.

 

[PETDOC]

Thanks for response. Everything is brand new and I've applied a heavy amount of grease. The first time I put it on it took me over an hour to figure out to to remove it as it wouldn't budge. I checked everything to try and rule out burrs/damage and found nothing. When I slipped it back on the exact same thing happened. The shaft totally engages the width of the collar. I don't know if the shaft should protrude a little or I pushed the collar beyond where the pin would slide up in the slot on the shaft. I think I'll use the chipper for a while and then try to get it off then back on. I really believe the locking pin should pop up completely.

 

[s219]

I'm in agreement. I think something is preventing the pin from popping all the way up.

 

[PETDOC]

Success! This time I was able to easily remove the drive shaft collar from the chipper spline. I pushed it back on several times and it stopped about 1/8" from where I estimated the pin would pop up. I removed the driveshaft and carefully inspected both the collar and spline for any burrs or irregularities and can't say I could detect any. I separated the halves of the driveshaft and put the back half on the chipper spline with the C-clamp depressing the pin. I hit the exposed end of the internal triangular shaft with a rubber mallet advancing the collar beyond the notch where the pin would release. I removed the C-clamp from the pin and to no avail tried pulling the collar away from the chipper. Finally used a crow bar to slowly move the collar away from the chipper and when the pin reached the notch in the spline if fully popped up locking the collar in place.

 

[rd_macgregor]

Success! This time I was able to easily remove the drive shaft collar from the chipper spline. I pushed it back on several times and it stopped about 1/8" from where I estimated the pin would pop up. I removed the driveshaft and carefully inspected both the collar and spline for any burrs or irregularities and can't say I could detect any. I separated the halves of the driveshaft and put the back half on the chipper spline with the C-clamp depressing the pin. I hit the exposed end of the internal triangular shaft with a rubber mallet advancing the collar beyond the notch where the pin would release. I removed the C-clamp from the pin and to no avail tried pulling the collar away from the chipper. Finally used a crow bar to slowly move the collar away from the chipper and when the pin reached the notch in the spline if fully popped up locking the collar in place.

It sounds like you'd likely need that pry bar to get it off again, too! A couple of years ago, somebody stole the PTO shaft from my BX62 chipper. A OEM Wallenstein replacement was CD $500. I now remove the PTO shaft and store it in my shed after every time I use the chipper. Fortunately, the shaft slides smoothly on, and off, the splines on both ends, as well as locking firmly.