Jump to content

Unofficial Home of Old Simplicity & Allis-Chalmers Garden Tractors

Sign in to follow this  

HB212 PTO mule drive

Recommended Posts


Need some help. I have an HB212 with a 48 inch mower deck that I can't seem to get the tension on the mule PTO drive belt to work properly. Last year it ran and worked just fine. I recently used the tiller ( without deck of course) and re-installed the deck and it will not adjust properly. I replaced the belt (29 1/4) and can get it to tighten enough to run the mower, However it is in the disengage position rather than the engage position. As a note last year I had to replace the magneto which required doing quite a bit of dis-assembly. Not sure or don't remember if I disconnect anything with the mid PTO or if I used the mower after I re-assembled the engine and the drive shaft. Can someone provide me with some instructions on how to adjust now reassemble the mule drive/idler pulley. I have the manual but it not much help now that have have it apart. I also read on another thread that the tension spring has two points of attachment which I might have moved. Any help would be appreciated.


Share this post

Link to post
Share on other sites

Did you pull the handle back that is under the rear axle. That handle should have a spring on it that pulls the mule drive back and puts tension on the deck belt?

Share this post

Link to post
Share on other sites

That should not be an issue. The cross drive belt will only stretch so far. The little sliding spring on the engagement pulley assembly rocker should be set to have a certain amount of compression. The exact amount is numerated in the factory manual. Sometimes my B10 one(same unit) needs a little tap with the heel of my shoe on the cover to make it settle.

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)

    • simplewrench
    • NandoG
    • ParkerBarker
  • Today's Birthdays

    No users celebrating today
  • 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