IH #80 combine

Jim Kam · Oct 11, 2018

I purchased a IH #80 pull behind combine and the book shows me that I have to turn my pulleys around to get the right speed but I'm not sure how to take off the pulleys they have a funny looking key that almost looks like it would pull out if you got something behind it like a claw to hook it but I don't want to try it before I reached out to some one who knows for sure so any help would be greatly appreciated.

Bob · Oct 11, 2018

Sounds like you are dealing with "gib head keys".

I gotta go hit the sack for the nite, so I'm gonna take the easy way out and suggest you GOOGLE "gib head key puller" for an education on how to deal with them.

Paul swpa · Oct 11, 2018

I don't ever remember needing to change the step sheaves on our 80. Though all we combined were small grains (oats, wheat, and barley)so it would depend on what your harvesting. The sheaves, if I remember right were arranged as opposite cones; small end lined up with big end on the other sheave. Had three steps if I remember. For gib key removal you need to bump the sheave back slightly on the shaft then the gib key should pry out - gib keys are tapered. Hope this helps some. Paul

Jim Kam · Oct 12, 2018

Paul
Thank You so much, I did not know what the key was called and once you told me and I realized that I was on the right path I was able to pull up so much info, now finding a gib key puller or making one of my own.

Thanks again
Jim

Jim Kam · Oct 12, 2018

Thanks Bob
Like I told Paul, that's exactly what I did, I love google what did we ever do without it.

Scott 730 · Oct 12, 2018

Look closer at the pulleys. I don't remember having to pull the hub to switch them around. The hub should stay on the shaft. 3 bolts hold pulley to hub I think.

Scott 730 · Oct 12, 2018

Memory is coming back.

3 bolts per pulley to remove them from the hub. Also a spacer on 1 of the pulleys. What "book" do you have?? This should be clear in the operators manual.

Paul swpa · Oct 12, 2018

Jim, We never had a regular gib key puller. Just used a heel bar or find a chisel (or two) with the right kind of taper to it and drive in between the head of gib key and (in this case) the sheave. As to the sheave having a separate hub, as another post said, I really can't remember - too long ago. I can only remember needing to change the speed maybe one time (for whatever reason) which was done by loosening the belt tensioner, moving the belt to another step in the sheaves, and readjusting the tensioner. Sort of like changing the speed on a drillpress. Paul

RedRoundhead · Oct 13, 2018

Congratulations on your combine! That's a good machine. I own and run and I each number 82 combine. Identical machine. Except for a few things.

You should get a manual. It tells you how to do everything.

There are three bolts on each set of shears, that you remove, which then allows you to remove the sheaves.

You do not have to remove the keys at all. Those stay put.

Scott 730 · Oct 13, 2018

Round Head, did you buy a pickup attachment from me some years ago? Your handle and location seem familiar.

RedRoundhead · Oct 14, 2018

Are you in Fremont? WI!

Then yes, I probably did. LOL.

fastfarmall · Oct 15, 2018

The only thing you need to speed it up for would be some hard threshing spring wheat every thing else, thresh's pretty easy, That been my experience!

IH #80 combine

Jim Kam

New User

Bob

Well-known Member

Paul swpa

Member

Jim Kam

New User

Jim Kam

New User

Scott 730

Well-known Member

Scott 730

Well-known Member

Paul swpa

Member

RedRoundhead

Member

Scott 730

Well-known Member

RedRoundhead

Member

fastfarmall

Well-known Member

Similar threads