1967 Cub 105 drive shaft roll pin

[RobDunbar1966]

Question: I have had the roll-pin on the engine output collar fall out twice. After the first time, I safety-wired it, but then the second time, it broke in two, managed to keep the pieces thanks to the safety wire. LOL Is a roll-pin the correct connection here? The strange slot in the output collar makes me wonder, or is it some kind of key?

 

[RobDunbar1966]

Since I posted this, I found another thread talking about a Spirol pin. Now all I need to find out is what the correct part number is; there are 8 different ones on my parts suppliers' website. LOL

 

[digger]

Since I posted this, I found another thread talking about a Spirol pin. Now all I need to find out is what the correct part number is; there are 8 different ones on my parts suppliers' website. LOL

Roll pins and spirol pins will not work. It has to be a solid dowel pin, which will not hold up until you fix that drive hub slot.

https://www.ccspecialties.org/clutch_driveline_rearend.html

 

[dschwandt]

Looks like some new parts are in order here.

Put a new driveshaft, front coupler and possibly a new rear coupler on your shopping list as well while you are at it.

 

[RobDunbar1966]

Roll pins and spirol pins will not work. It has to be a solid dowel pin, which will not hold up until you fix that drive hub slot.

https://www.ccspecialties.org/clutch_driveline_rearend.html
View attachment 151387

I understand the solid dowel pin, but why does my drive hub have that weird Snoopy-looking slot instead of a regular parallel slot?

 

[dschwandt]

Because it's WORN OUT!!!~
And it should look like these, And NOT like the 3rd picture

 

[RobDunbar1966]

Because it's WORN OUT!!!~
And it should look like this

WOW, that's a lot of wear. Thanks!

 

[dschwandt]

Rob
That one was in my 149/DanCo unit before I restored it several years ago
Check your mail
Dave

 

[RobDunbar1966]

Rob
That one was in my 149/DanCo unit before I restored it several years ago
Check your mail
Dave

WOW, OK, mine isn't that bad. LOL

 

[-CӞ]

I understand the solid dowel pin, but why does my drive hub have that weird Snoopy-looking slot instead of a regular parallel slot?

It really is Snoopy-looking!

 

[bcarl]

WOW, OK, mine isn't that bad. LOL

If your handy with a welder you can weld up the worn slot and drill out the opening. My son-in-law fixed some for me by welding up the worn area.

 

[RobDunbar1966]

OK, update. I was getting ready to install a new drive shaft and front coupler. I was moving the tractor in the garage; I noticed the end of the drive shaft going towards the back, wobbling where it enters the body opening (hole). Is this normal, or is there something out of alignment toward the back end? My first thought was the flex discs.

 

[mgonitzke]

I'd check on the condition of the driveshaft, flex coupling, and transmission coupler as well. As worn as the engine side was in your pics, the other end is probably worn out, too.