Jump to content

Unofficial Home of Old Simplicity & Allis-Chalmers Garden Tractors

Sign in to follow this  

Alternative to vari drive unit?

Recommended Posts


A previous owner somehow welded one of the pulleys together on my vari drive unit of my B-112. I've read about someone replacing the unit with a basic 3 speed.

Can anyone give me some guidance on what models would work for the swap?

Thanks in advance!

Share this post

Link to post
Share on other sites

As far as I know, you already have the basic 3 speed. The difference between that and the variable drive was the variable drive itself. The transmission was the same? Two standard pulleys in place of the variable would do the job. The shafts are probably the issue, but could probably be made to work. Just tossing this out there, others with more knowledge will chime in.

Share this post

Link to post
Share on other sites

Just remove the varidrive pulleys and mechanics. Replace with standard 1/2" belt pulleys. To hit the keyway the hubs of the pulleys will be in the inside so the belt will further away from the tractor frame vs. a std 3-speed. Also change the belt/clutch pulley to a V pulley also. You will need to play with belt guide whiskers or make the exiting belt brake work as the belt will want to keep spinning when the clutch is depressed. You will need to figure out the belt length needed based on the pulley sizes you use.

Share this post

Link to post
Share on other sites

I myself like the varie drive of the B112. Not sure if it is the front or rear pulley that is welded but if the rest of the mechanism is in good shape you could always buy the replacement pulley to keep the vari drive. Pretty sure everything you need is on eBay now and I think a club member has had the front pulley set in the classifieds.

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Sign in to follow this  

  • Who's Online (See full list)

    • Paul M.Murphy
    • RickS
    • RayS
    • Brettw
  • Today's Birthdays

    1. Big 10
      Big 10
      (71 years old)
    2. cowfan
      (51 years old)
    3. dynodave
      (71 years old)
    4. WaylandLegacy
      (44 years old)
  • Recent Status Updates

    • SonOfCreepfeed


      Thinkin' about this old girl.

      · 2 replies
    • Dean McFadden

      Dean McFadden

      Good morning peeps! I’m always searching for helpful information with my AC collection. Hope to find out new information and pass on my own experience in restoration. Here are some pics of my babies. I’m still looking for front rims for the 410 so yesterday I put the 310 wheels on took it for a drive. Working pretty good but still needs some carb work. Gotta get the 310 running next. Have a great day!😁

      · 1 reply
  • Adverts