Jump to content

Unofficial Home of Old Simplicity & Allis-Chalmers Garden Tractors

Sign in to follow this  

Simplicity 3212H

Recommended Posts

I just purchased a simplicity 3212H and was wondering about how old it was and also if there is any easy was of replacing the belt that drives the hydraulic pump or do you have to remove the hole engine to get the drive shaft out.
Thanks Eric

Share this post

Link to post
Share on other sites
You don't have to remove the engine. There's a coupler on the front end of the driveshaft that has two bolts connecting the pulley to the engine and two others (90 degrees apart) connecting to the driveshaft. Removing these bolts will allow you just enough room to thread a new belt in. I'd recommend looking at an exploded parts diagram to see what I'm talking about. Be aware that this will be a slow, pehaps frustrating process but it can be done -- it just may take two hours or more. There are also two bolts that hold the front of the hydraulic pump to the metal "firewall" that allow you to adjust tension on the belt.

You may want to consider buying a Simplicity brand belt for two reasons, even though it'll likely be more expensive:
1. It will likely last far longer than an aftermarket belt (trust me -- you won't want to go through this procedure too often...)
2. They will likely print or photocopy an exploded parts diagram for you, if needed

Two other points:
1. Make sure you get the coupler bolts tight when you put it back together -- this thing spins at up to 3600 RPM. This may be the most tedious part of the process since you can only turn the bolt about 1/16 of a turn with each placement of your wrench...good swivel drives for your ratchet may help here...
2. Inspect your generator/starter belt closely and replace at the same time -- it's the same process....

Hope this helps. I've only done this once -- others may have further tips!

Share this post

Link to post
Share on other sites
Hi Eric, Kents sure is write you only want to do this one not only write but once. Amen on the factory belt for sure. If you find a short cut let us know. Just may I add one thing-make sure the lock washers are still in good shape or just plain but new ones on. I have seen the damage done my what Kent explained if the shaft lets loose. While your at it check the round disk that acts as a connecter for the drive shaft to the engine for damage or wear. If it even looks a little cracked replace it. Kent's idea about the generator belt is very wise indeed. Thanks and Good Luck-jackl

Share this post

Link to post
Share on other sites
This topic is now closed to further replies.
Sign in to follow this  

  • Who's Online (See full list)

    • stew2YWP
    • PhanDad
    • Brian Shires
    • ShaunE
  • Today's Birthdays

    1. mjbarbero
      (64 years old)
  • Recent Status Updates

    • Paul M.Murphy

      Paul M.Murphy

      Hello glad I got on this site. I hope to upload a couple of photos of my Simplicity Broadmoor 
      Model 707 Tractor. I have replaced all the belts on it and installed a new ignition switch.
      Have a mower deck which was in poor shape , repaced a couple of bushings and welded the
      deck where there was some holes. The tractor and mower deck came from a friend and the 
      mower deck metal was getting pretty thin. Some new metal was put in it and we also undercoated the underside of the deck. This was done by my friend Greg Toulman.
      I have not put the mower deck on the tractor yet, waiting for Greg to come home and give me a hand. Can you please tell me if there is a manual for the mower deck and where I could get one.
      I would also like to get some moon wheel discs as well.
      I will try and down load some photos of the tractor when my wife shows me how to. 
      I really love driving this tractor and also how well it is made compare today's tractors, especially the flexible rear end and the rollers.
      Tell the next time 
      · 8 replies
    • jbrooks

      jbrooks  »  Talntedmrgreen

      folowing  this from a link at the downloads.  I just rescued an AC 920 with the lambodini diesel. I can' t download  yet .  Where did you find the PDF copy you posted. . I would like to figure out how to adjust the injection pump. 
      I assume it's a bosche, correct
      · 0 replies
  • Adverts