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 Locking a Roper 633 or Sears high/low no welder moose knuckle method

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Moose
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PostSubject: Locking a Roper 633 or Sears high/low no welder moose knuckle method   Sat Sep 06, 2014 6:40 pm

Alright so I woke up this morning under the assumption I was going to do absolutely nothing and never even get out of my pajamas... a hour later I had the masseys tranny sitting in two pieces on a set of sawhorses. I started off the locking process with the idea I would weld up the diff fearless style, then apon further inspection and my desire to be as lazy as possible I had a eureka moment!

I noticed that the gears all lined up with the splines when they were rotated in a certain spot so I thought "hey if I had another one of those gears I could just stab it between the other two and itd lock the ends of the shafts and itd fit perfectly" then I realized I had a spare transmission from our old craftsman that died long ago. So after tearing that one apart too I had a spare gear then I tore apart the masseys diff and started tinkering.

Parts needed:
Locktite
RTV (or the actual gasket)
1 gear from sears parts direct
The diff gear





there is only a little clearance between the ends of the shafts which is what gave me the idea





Pretty much the same diff as fearless



As you can see the gear fit perfect. However the gears are not splined to match the teeth so the gear will only line up with the teeth and the splines in one certain spot.





Everything fits tight!





Everything locked up and fit back together tight like stock.

Now I know some people are gonna be like "hey wait those axles have a clip cut into them effectively making the axle a 3/4" where the clip locks in!" yes this is true, but the gear also locks the orbital gears together allowing them to share the stress and strain when it tries to slip so in theory you have 9 gears taking the stress and shear forces being applied to the differential. My money would be more on the bolts shearing before the diff breaks a gear but only time will tell.

I shall call this the moose knuckle method!

Any chance of getting this stickied for lack of welderage?


Last edited by Moose on Mon Jun 01, 2015 10:41 am; edited 5 times in total
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CornShuck4CE
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PostSubject: Re: Locking a Roper 633 or Sears high/low no welder moose knuckle method   Sat Sep 06, 2014 6:51 pm

Well dun moose. Great write up. Looks like a very afective way of locking that transaxel. Great job.
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Moose
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PostSubject: Re: Locking a Roper 633 or Sears high/low no welder moose knuckle method   Sat Sep 06, 2014 6:53 pm

Sometimes doing stuff when your waking up in the morning works!
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PostSubject: Re: Locking a Roper 633 or Sears high/low no welder moose knuckle method   Sat Sep 06, 2014 11:34 pm

I didnt get it at first but now I do, and thats pretty cool how that lines up! Thats a 633 right? If so, I might have to try it. The Upull near me has a bunch of 633s. Lemme know how it goes.

And yes, you can get sticky.

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Moose
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PostSubject: Re: Locking a Roper 633 or Sears high/low no welder moose knuckle method   Sun Sep 07, 2014 12:10 am

it is basically the same as a 633 if I remember right it is a copy built by ayp and several companies from what I have heard from the diagrams I have seen they only really have differences in the gear setups and so on. I wouldnt mind getting my hands on one to check it out I thought it was neat all you need to do this is one gear that is 10$ from sears
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PostSubject: Re: Locking a Roper 633 or Sears high/low no welder moose knuckle method   Sun Sep 07, 2014 7:40 am

Looks nice! I think I heard that you can flip the outer gears all one way, and lock it. No idea if that works.
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PostSubject: Re: Locking a Roper 633 or Sears high/low no welder moose knuckle method   Sun Sep 07, 2014 12:13 pm

It would work but then you are putting a lot of stress on the one axle gear this way it is evenly distributed
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PostSubject: Re: Locking a Roper 633 or Sears high/low no welder moose knuckle method   Sun Sep 07, 2014 3:34 pm

@Moose wrote:
is one gear that is 10$ from sears

I looked on sears webcite and at a few links and seeing the part # is 26 on the diagram (#633a34) for the "shaft/gear" and is no where to be found on sears or parts tree, ebay, no where.

Found a good diagram though, about it.

http://www.searspartsdirect.com/partsdirect/part-number/Craftsman-Parts/Walk-behind-lawn-mower-Parts/633A34/0071/917/Model-91725201/0247/1500600?keySuffixId=&pathTaken=partSearch&pathRender=modelComponent&documentCompId=00009959&diagramPageId=00001

Unless im missing something.

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Moose
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PostSubject: Re: Locking a Roper 633 or Sears high/low no welder moose knuckle method   Mon Sep 08, 2014 1:34 am

I'm not sure if it is the same as the 633 but I'll have a look in the morning and link it up last I saw it was 10$ someday I'll get a 633 and check it out
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PostSubject: Re: Locking a Roper 633 or Sears high/low no welder moose knuckle method   Mon Sep 08, 2014 7:20 am

Doug Fackler wrote:

And yes, you can get sticky.

Let's try to keep this on topic, can we? lol!

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PostSubject: Re: Locking a Roper 633 or Sears high/low no welder moose knuckle method   Mon Sep 08, 2014 10:58 am

lol to late :p link posted in the first post
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PostSubject: Re: Locking a Roper 633 or Sears high/low no welder moose knuckle method   Mon Sep 08, 2014 2:18 pm

Doug Fackler wrote:
I didnt get it at first but now I do, and thats pretty cool how that lines up! Thats a 633 right? If so, I might have to try it. The Upull near me has a bunch of 633s. Lemme know how it goes.

you should totally snag a 633, take the gears you need and send the other 2 to me, so i can lock mine up

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Feel free to try... Dont let anything but fear and common sense stop you. 




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PostSubject: Re: Locking a Roper 633 or Sears high/low no welder moose knuckle method   Tue Sep 09, 2014 1:25 am

It's only a 10$ gear lol be easier to get it from sears than pry it from Doug lol
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PostSubject: Re: Locking a Roper 633 or Sears high/low no welder moose knuckle method   Thu Jun 11, 2015 7:11 pm

did you pull this off without a schematic or service manual?

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PostSubject: Re: Locking a Roper 633 or Sears high/low no welder moose knuckle method   Mon Sep 07, 2015 11:31 am

Wow I should pay attention more >.> yeah pretty much! I cracked it open and stared at it a while. I had a little experience from taking apart the gt6000 back in the day but other than that it all kinda fits together all common sense like
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PostSubject: Re: Locking a Roper 633 or Sears high/low no welder moose knuckle method   Tue Sep 08, 2015 12:51 pm

I will try this method along with the flipping a set of diff gears when I lock my trans I use for pulling. My trans has four sets of diff gears, so I am going to flip two of them to lock it, and take some strain off the gear you use in Moose's method, since pulling with the onan twin will put a big load on it.



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PostSubject: Re: Locking a Roper 633 or Sears high/low no welder moose knuckle method   Wed Sep 09, 2015 12:24 pm

You actually have better odds of breaking it just flipping the planetary gears. You cause a shear load on one side of the differential so instead of having the load kinda evenly distributed across the diff it is lopsided and will shear the bolts more than likely. Haven't cracked the 633 on my Sears but if the knuckle method won't work I suggest welding up the planets.
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PostSubject: Re: Locking a Roper 633 or Sears high/low no welder moose knuckle method   Fri Sep 07, 2018 12:55 am

Holy toledo its been 4 years since this garbage happened lol. I keep seeing people wanting to flip gears or weld them up but its so much easier to just do this. Im glad I sucked down the coffee that morning.
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