ST1032 impeller removal and auger gearbox disassembly - Snowblower Forum : Snow Blower Forums
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post #1 of 18 Old 12-31-2015, 10:06 PM Thread Starter
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Question ST1032 impeller removal and auger gearbox disassembly

I am trying to remove the impeller from the shaft (it is really seized) from one of my Ariens ST1032, I've tried soaking in penetrating fluid and the heat and cool process using an oxi-accet torch with no success. So I decided to take the augers shaft off from the gearbox (so that I could fit the impeller on a 30ton press that I have access to), but it is also seized, so I started taking the gearbox apart and I have a question on how to take the impeller shaft off from the gearbox?.
I have the threaded big retaining nut and the side cover off.

Thanks.
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post #2 of 18 Old 12-31-2015, 10:43 PM
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Have you considered the electrolysis rust removal process?


I used a five gallon bucket, and 2x2 pieces of wood crossed it, as insulators. And to also prevent the aluminum case from touching the water.

I used this on my 622, and after a day, they fell free.

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MTD....2 stage(modern 8.5 HP) not my favorite
Honda HS622 TA-B - acquired at an auction- nice machine for it's size.
Toro S-140- Picked it up on trash day... it runs, sort of.
Yamaha YS 240 TB "Ricky" latest Craigslist find- on the bench now.
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post #3 of 18 Old 12-31-2015, 10:49 PM
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Quote:
Originally Posted by db9938 View Post
Have you considered the electrolysis rust removal process?
I used a five gallon bucket, and 2x2 pieces of wood crossed it, as insulators. And to also prevent the aluminum case from touching the water.

I used this on my 622, and after a day, they fell free.
I don't want to discourage you but even after electrolysis I had an auger I eventually gave up on. The electrolysis was obviously working as I had all kinds of rust in the soup, but still could never get the augers off the shaft.
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post #4 of 18 Old 12-31-2015, 10:53 PM
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Fair enough, but with all the other methods that have been tried, I'd thought that I would just throw it out there.

Garage:
MTD....2 stage(modern 8.5 HP) not my favorite
Honda HS622 TA-B - acquired at an auction- nice machine for it's size.
Toro S-140- Picked it up on trash day... it runs, sort of.
Yamaha YS 240 TB "Ricky" latest Craigslist find- on the bench now.
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post #5 of 18 Old 12-31-2015, 11:02 PM
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There should be a retaining bolt on the front, under the dust cap. If you remove that, you should be able to pull the impeller shaft out through the back, leaving the worm gear in the case. Putting it back together will be tougher, but it can be done.

The last large impeller I removed like this (from a 924084) took lots of heat and a 40 ton press. The larger shaft diameter provides more surface area for corrosion to cling to...

Good luck!
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post #6 of 18 Old 12-31-2015, 11:31 PM Thread Starter
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Thanks everyone.

Db,
I appreciate your sugestion. I have everything to do electrolisis and I will eventually try it, but I think it would not happen until next spring.

Initailly it loked like the auger and impeller were one piece but after a few heat and cool cycles you can see how rust is breaking off.
One more thing that I am willing to try is the wax trick.

Thanks Sidegrinder for the details on how to take the auger shaft off the gearbox. Now, how do you get the dust cover off?
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post #7 of 18 Old 12-31-2015, 11:44 PM
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If I remember right, it is a slight press fit. Heat the area lightly and try to pry it off or twist side-to-side with a pipe wrench. Try to be gentle if you want to reuse it--easier said than done.
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post #8 of 18 Old 01-01-2016, 04:06 AM Thread Starter
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Quote:
Originally Posted by sidegrinder View Post
If I remember right, it is a slight press fit. Heat the area lightly and try to pry it off or twist side-to-side with a pipe wrench. Try to be gentle if you want to reuse it--easier said than done.
I'll be dealing with it later, I'll let you know how it goes....
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post #9 of 18 Old 01-01-2016, 06:35 PM Thread Starter
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Tried the wax trick, did not work, but I was able to disaasemble the gearbox and place the impeller and shaft on the hydraulic press, took a bit more than 5 tons to break it free.

Question:
On Ariens 924 series blowers, is the impeller normally a tight fit on the shaft?, or is it suppossed to spin freely and the 2 roll pins act like shearpins?
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post #10 of 18 Old 01-01-2016, 06:55 PM
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I don't know the answer but I can tell you that I used a 60s model that kept breaking the roll pins. I quickly learned to take off the chute and replace them with a long punch.
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