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nipper


Joined: Jan 22, 2012
Points: 8

Ariens ST724 won't drive
Original Message   Jan 22, 2012 5:40 pm
Hi-

I have an Ariens ST724 (model 924075), which has stopped powering forward when I press the drive clutch lever. I took off the bottom cover to see if it was something fairly easy to repair/replace, like a belt, and I found a broken spring lying in the cover.  I'm guessing this is the root of my problem! I can't really afford to bring it to a shop, so I was hoping to be able to fix it myself.  Here are a couple of details:

  • The auger seems to keep moving now, even when I release the clutch lever.
  • For a while after it stopped powering forward, it DID work in reverse, but no longer does.

Here is a picture of the broken spring and the drive plate, etc.:







Any help would be much appreciated!

Thanks,

Nipper

Replies: 7 - 16 of 16Next page of topicsPreviousAllView as Outline
jrtrebor


Location: Michigan - 3 hours north of Chicago on the lake
Joined: Feb 10, 2010
Points: 539

Re: Ariens ST724 won't drive
Reply #7   Feb 5, 2012 5:54 pm
As was mentioned, the friction drive plate should never stop spinning.  Also it is the friction drive plate assembly that moves into contact with the friction drive wheel.  The rubber friction drive wheel does not
move forward or backward.  It only spins and moves left and right.

Assuming there is good tension on the tension pulley and belt.
There are only a few things that could cause the friction drive plate to stop spinning. I would first check this.  Engage the drive handle and observe that the friction drive plate has stopped.
Now check to see if the belt and large pulley are still spinning.  Be careful doing this.  I would keep the engine at a low speed use first gear.  And put the front of the blower housing up against an
un-moveable object.  A wall, fence post, car tire.  Or better yet have someone else look at the belt and pulley while your at the controls.
Either way.  If the drive is engaged and the friction drive plate has stopped but the belt and pulley are still spinning.  That will narrow down where the problem is.
nipper


Joined: Jan 22, 2012
Points: 8

Re: Ariens ST724 won't drive
Reply #8   Feb 11, 2012 1:40 pm
First, let me say that the people on this forum are incredibly knowledgeable and helpful - awesome!

I tried some of the suggestions that have been posted.  Here's what I've found:

First, when I tipped the machine forward, the wheels were able to turn freely when in neutral.  When I then put the wheels back on the ground, I got the same result.  Turned about a 1/4 revolution, then stopped. It just doesn't have the power to turn the drive wheels.

After taking off the belt cover, I noticed that when I engaged the drive clutch the Attachment Drive Idler Pulley wasn't engaging (see pic below - the pulley on the bottom-most left).  I believe that pulled is supped to press on the belt to create tension and turn the plate. It seems that some sort of linkage to this pulley is either broken or stuck or something.


nipper


Joined: Jan 22, 2012
Points: 8

Re: Ariens ST724 won't drive
Reply #9   Feb 11, 2012 2:03 pm
Update:

I went back and looked at the pulley again, a little more closely (it's a little tough to see).  It looks like there is an arm attached to the arm that the pulley is attached to, and that arm has a hole in it where it looks like a spring should go.  Could this be where my broken spring is from?  If so, what does that spring attach to?
carlb


Joined: Nov 16, 2010
Points: 279

Re: Ariens ST724 won't drive
Reply #10   Feb 11, 2012 2:46 pm
The spring needs to attach to the arm on the drive pulley (left hand side in your photo and closest to the engine)and attach to the right hand side of the snow blower when viewed from the front.  There should be a hole or slot where the spring can attach to the snow blower frame. You should be able to find a replacement spring at any hardware or big box store. 

That is certainly the problem with you snow blower drive.
Shryp


Location: Cleveland, OH
Joined: Jul 26, 2010
Points: 532

Re: Ariens ST724 won't drive
Reply #11   Feb 11, 2012 3:33 pm
Here is a picture of my Ariens.  You can see the spring in the bottom left.  I don't think I have any clearer pictures of it.  I think there is a hole in the idler arm and the other hole is in the V shaped reinforcement plate.



nipper


Joined: Jan 22, 2012
Points: 8

Re: Ariens ST724 won't drive
Reply #12   Feb 11, 2012 3:55 pm
Alright - I think there's a light at the end of the tunnel!  I'll give this a go and see what happens.  Thanks, guys.
carlb


Joined: Nov 16, 2010
Points: 279

Re: Ariens ST724 won't drive
Reply #13   Feb 11, 2012 6:10 pm
Shryp,

Is the spring on you snow blower below the pivot point?
jrtrebor


Location: Michigan - 3 hours north of Chicago on the lake
Joined: Feb 10, 2010
Points: 539

Re: Ariens ST724 won't drive
Reply #14   Feb 11, 2012 6:51 pm
One end of that spring hooks in a hole in the bottom of the arm for the "drive" idler pulley.
The other end of the spring looks in a hole in the side of the housing just above the right wheel axle.  It's just a hole or slot.  You will be able to see the end of the spring hook on the outside of the housing
above the right axle after you install it.  It is possible to get the spring put back on without taking the blower housing off but it's a tight fit.
There is no linkage to move the idler pulley for the "drive" belt tension.  The "drive" belt idler pulley is always in contact with the belt.  It is always under tension.  Unlike the idler pulley for the "blower"
belt.  That pulley is only in contact with the belt when you depress the handle.  When you release the handle the pulley pulls away from the belt and the blower (impeller and auger) stop spinning.
If you try and pull the idler pulley for the "drive" belt away from the belt you should feel a lot of tension.  That is, if the spring is in place and working.  If you grab the pulley and it moves easily
away from the belt.  The spring is not in place.  And that is why the drive system is not working.  The belt is simply slipping around the pulley's.
This message was modified Feb 11, 2012 by jrtrebor
nipper


Joined: Jan 22, 2012
Points: 8

Re: Ariens ST724 won't drive
Reply #15   Feb 12, 2012 10:34 pm
trouts2




Location: Marlboro MA
Joined: Dec 8, 2007
Points: 1328

Re: Ariens ST724 won't drive
Reply #16   Apr 19, 2019 1:06 pm

   I have a similar problem drive problem with an old Ariens 724.  The factory numbers are rubbed off but 924028’ish. 

I put in a hardware store tensioner spring last year but it fell out on the first storm so no drive.  I have other machines so sidelined it until warm weather.  I forgot how I installed it so back to Abby’s and found the answer. 

  Nice post so I’ll get the spring placed in a few days.  I remember most of the posters so know it’s reliable info.     I learned a ton on Abby’s over the years.  Where is Borat these days?

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