1872 driveshaft isue

[Newt8411]

Do I need to put the 1/8 roll pin in the far back at the tranny or can I leave it out, I had put it in be for and I had to take my engine back out for a oil leak and the engine coupler the ball was knocked out and the 1/8 roll pin I the back has broke off. Part of it is still in the input shaft to the tranny. I was wandering if I can just leave it out. Seems like a lot of psi on it to pry it front enough to get a new pin in. does anyone have the guide on how to properly install the drive shaft on a 1872. Should I just tighten the bolts threw the rag joints just so they don't pull the rag joint. I tried finding info on installing the driveshaft but know luck any info would be great. Also I used the same parts to put it back in and it seems tight Thanks

[RedOnes]

Hi, sorry to see that you are still fighting that driveshaft . I could not recommend leaving that 1/8 pin out. Now you`ll need to get a small pin punch to remove the broken part and a new pin. There is a service manual for download here .
http://www.onlycubcadets.net/forum/s...ad.php?t=25397

but the info is not specific to that model and doesn`t say much about reinstalling the shaft....I guess installing the shaft while the engine was loose did not work....or maybe you are simply asking if you really need to replace the broken pin because it can be so much hassle. I would not recommend installing a driveshaft half vast and yeah it can be a PITA. Also any excess movement on those splines could cause premature wear and when the hydro spline is worn out , good luck on finding another one .

[Newt8411]

I can put the roll pin back in, but I have to pry it front pretty hard to line up the holes, is this normal to have to pry it front to line up the hole. and the bolts for the joints should I just snug them up so they don't distort the rag joint much. Don't seem to matter what I do its still hard to get the back roll pin lined up. I put the same parts back in. 2 rag joints at the front and 2 at the back right? Thanks

[RedOnes]

Originally Posted by Newt8411

I can put the roll pin back in, but I have to pry it front pretty hard to line up the holes, is this normal to have to pry it front to line up the hole. and the bolts for the joints should I just snug them up so they don't distort the rag joint much. Don't seem to matter what I do its still hard to get the back roll pin lined up. I put the same parts back in. 2 rag joints at the front and 2 at the back right? Thanks

Yes ..2 discs at each location...
http://www.partstree.com/parts/cub-c...99/drive-line/


I dont see a problem with very tight bolts on the joints to gain a little more movement to get holes lined up.
I was hoping that leaving the motor loose until the shaft was completely installed would help but maybe not on yours...???
If I remember right you only replaced the hydro coupling . I`m wondering if that alignment ball is pressed in as far as before.I suppose that if it`s sticking out too far it would touch the shaft shoulder and not move anymore in that direction. Just a guess...

[Newt8411]

The alignment ball is the same distance sticking out. I can't move the engine at all on my tractor there's slots at the back bolts but not the front. Maybe what I'll do is make a new drive shafts and I can drill new holes for the roll pins to take the preasure off of the pins. I do have another tractor maybe I'll try that drive shaft.

[RedOnes]

Originally Posted by Newt8411

The alignment ball is the same distance sticking out. I can't move the engine at all on my tractor there's slots at the back bolts but not the front. Maybe what I'll do is make a new drive shafts and I can drill new holes for the roll pins to take the preasure off of the pins. I do have another tractor maybe I'll try that drive shaft.

I would try removing those 2 bolts so that sliding the engine is possible but..........
I hate to think it`s necessary to make or modify a new shaft but I have done it before ....
All you would have to do really is drill another 3/8 hole in that shaft over about 3/8 inch from the existing hole at the front end and possibly turn the small diameter in a little more...... of course the hole must be directly through the center of the shaft.
I wouldn`t try it with a drill press

[aagitch]

I usually remove one of the bigger roll pins from the driveshaft to allow plenty of fore and aft movement to get the 1/8 pin lined up and punched in. Then I'll use a punch to line up the bigger pin hole on the driveshaft while tapping in the pin from the opposite side.

[RedOnes]

yeah, A little side pressure on those pins is not bad and as it was designed I guess.However, a 5 foot pry bar should not be necessary..Plan A was to find out the reason ..I guess we moved on to plan B.