Straight From the Horse's Mouth - The final chapter

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stevasaurus

3 SPEED #5025 UNI-DRIVE REBUILD

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My intent here is to show lots of pictures so if anyone is rebuilding one of these or some of the others...you can do it without fear and I am adding some very helpful information. I had a post that lead up to this that has some information in it also, and while it overlaps, I wanted to do the rebuild separate. This post is meant to be used with the manual...the pictures help explain better then the pictures in the manual.

Now I want to share what I learned as I rebuild this...I realize that some have done this, but this was my first time (transmission virgin) and I know I am not the last one to do this. If I can help or make this easier, then I have given back a little from all the help I have received from this site. :thumbs:

 

Here are a few shots of what this looked like whee I opened the trans.  Notice the 1/4" ball bearings on some of the gears.  Those are from the #1533 bearings.

702 transmission 002.jpg

702 transmission 003.jpg

702 transmission 004.jpg

702 transmission 005.jpg

This is a shot showing gear placement in the left side of the case. Notice the bevel of the reverse gear (front right). The left side is the shallow side of the transmission halves.
702 transmission 008.jpg

These are the parts of the differential..the 2 casings on the outside, the 2 axles, the differential bull gear, the 4 posts and the pinions that go on these, and the bolts and nuts that hold it all together.
702 transmission 011.jpg
I can't get enough looks at the gears before I tear it apart...next 2 pictures are for future reference.
702 transmission 006.jpg

702 transmission 007.jpg

I found a good assortment of 3/8 and 1/2 sockets that made fair to good arbors for pounding out and tapping in most of the bearings and seals.
702 transmission 016.jpg

These are the bearings and seals you need to do the R&R. You can get all the stuff from Toro or the site that Jason gave in the related post. One note...the Toro#1303 seal is discontinued. This is called a cup seal, because it has a cup shape. I replaced it with a kind of match (SKF #7410) same dimensions but more like a regular oil seal...it will work. This place used to be Berry Bearings in Elgin...now it is "Motion Industries"...the web site MotionMRO.com...they can match up any bearing or seal. Excellent info. and prices were very good.
702 transmission 017.jpg

Shot of the bearings and seals removed, cleaned and sanded. Used Valspar Restoration series...I like the red match with my 702 and I like the hardness of the paint.
702 transmission 018.jpg

Showing bearings and seals installed...notice (arbors on right).
702 transmission 020.jpg

702 transmission 021.jpg

Putting differential back together...show axle in place with bolts in place.
702 transmission 022.jpg

Added pinion posts and in 2nd picture...added pinions (alternating one up and one down).
702 transmission 024.jpg

702 transmission 025.jpg

Added Bull Gear
702 transmission 026.jpg

Added other axle and case and bolted together. At this point, make sure you can rotate the axles...they should rotate in opposite directions.
702 transmission 027.jpg

Placing input shaft and gear (one piece) and the reverse idler shaft.
702 transmission 028.jpg

Installed the 2nd & high shift rail and fork. (one on the left). Also installed both ball bearings, spring and stop pin, and low & reverse shift rail. The 2 sliding gears were then placed...the grooves face each other and the smaller gear goes on the bottom.
I had a pencil magnet that I used to hold the 2nd ball bearing, while I took an Allen wrench through the hole to hold the bearing out of the way while I placed the low and reverse shift rail. the picture also shows the reverse idler and brake shaft in place.
702 transmission 029.jpg

 

702 transmission 030.jpg
Another view showing forks and gears.
702 transmission 031.jpg

Showing reverse idler (bevel up...I hope) in front. Splined shaft installed through the shift fork sliding gears. The cluster gear is then installed( 2 wood-ruff keys here...one on each end). Also, the differential and axles are placed (note the nuts are facing up).
702 transmission 032.jpg

different angle
702 transmission 032.jpg

 

702 transmission 033.jpg

yet one more angle
702 transmission 034.jpg

Put together..old 5 gal wood create works great as a work bench (all shafts fit through and keep work level). Used a hard rubber hammer to tap halves together.
No leaks when I filled with 90wt gear oil...approx 1 1/2 qts. Checked shifting and started to put the 702 back together today. A final picture or a video tomorrow (hope).
702 transmission 036.jpg

I want to thank Rickv1957 Fan, MikeRJ, Buckrancher,Suburban550,IndyWH Smokin'Joe, the Helmett and Charlie for all their help and advice...a huge thank you guys. :wh::wh::thumbs:

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Looks great. How much did you pay for all of the bearings together? You bought the 1533 bearings from toro? They are around $70 now.

What is Jason's site? I am interested because my bearing distributers prices have gone through the roof. I'm getting tired paying $12 for a bearing I can slip over my little finger!

Charlie

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Steve: This is great that you took so much time and care to share with others on Red Square for the rebuild.

A fantastic job!

:omg:

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Charlie and everyone else...this is Jason's site...

http://www.rcpw.com/search?quest=1533&search=Search

The old berry bearings in Elgin is now Motion Industries

e-mail....MotionMRO.com They can match any bearing(I am told) or seal if you give them the O.D. I.D. and height of the bearing or seal. The guy behind the counter is a guy I have known since the late 60's and the service station days. He is still excellent and very helpful. If you end up calling him, you can mention my name, will not lower the price though. He is the kind of guy that...if you are an a-hole...but if you are serious, he will bend over backwards. When I told him that only Toro made the #1533 bearing and had to get it from them...he looked at me and rolled his eyes. I did not have the I.D. O.D. and height at the time to check it out. If someone has those measurements, I will go back and see if he can match it up. Well worth the time. :omg:

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Sorry Charlie...(remember that from a tuna commercial), I don't know how you can do the trans rebuild for $150 with core deposit. I spent a little more then that.

House prices may have come down, wages are lower, but machined parts are not cheap. :omg:

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A+ on that post Steve. Tk U for that effort. :omg:

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Glad to help ya out Steve!!! Just be careful putting it back in

the 702 !!! Hate to see you hurt yourself again :omg:

Indy

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Nice tutorial. Looking forward to the video of her back on her feet. Good job. :omg:

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Way to go Steve,

just a quick ? about the orange coloration. Is this just surface rust on the gears, shafts, etc, or is it residue from old water / oil contanimation ?

I'm assuming if you could have just wiped it off, it would have been.

Great Job :omg:

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Great job, Steve. :D I'm really proud of you, not only for rebuilding the tranny, but doing it without any injuries to yourself. :D Good luck reinstalling it and great pics. :omg:

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great job Steve! this will benefit a lot of people, including me. thank you. :omg:

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Great informational post and great pics too!

Now... who wants to do a tutorial with my... their GT-14 hydraustat ?

Joe

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The transmission is working fantastic...after witnessing the water damage in a trans...I would tear down every trans suspected of having water or sledge in it. Way to easy and the cost of a $5.00 gasket and piece of mind, versus the cost of bearings...up to $300.00 and going up. I have 3 more horses that were stored with this one...guess what I will be doing in the next few months?

:D

Anyway...a couple of shots of the horse recipient of the rebuild...

2009_0404transmission7020002.JPG

2009_0404transmission7020003.JPG

After doing all that cleaning and painting.....you can't see it...but I know it is there and feel good about it. :D

 

 

I've been riding this around the block for the last couple of days...working it in so to speak...needs a cup holder. :D

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I had one of the older 3-part transaxles. It had water damage and I bought a new one on eBay for $51.00 and $46.00 to ship. I had to switch the side cover because the brake band opened when the clutch/brake pedal was pressed. :omg: I tried it yesterday and it works great. :D

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It looks like I am going to have to do the same thing, and do a complete rebuild on my 6 speed trans in my Raider 12. it has ran great for 38 years and i think i have an axel clip falling apart. as long as i have it apart i am going to relace all the bearing & seals.

Does anyone have the crossover numbers to listed parts with a good suppier?

The repair manual shows my trans. is a 5073 1972 model

never been inside a trans before, looks like it can be done.

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they are not hard to take apart. Outting it back together is another story. Just remember to take out the shifter before lifting off the top half :thumbs:

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It looks like I am going to have to do the same thing, and do a complete rebuild on my 6 speed trans in my Raider 12. it has ran great for 38 years and i think i have an axel clip falling apart. as long as i have it apart i am going to relace all the bearing & seals.

Does anyone have the crossover numbers to listed parts with a good suppier?

The repair manual shows my trans. is a 5073 1972 model

never been inside a trans before, looks like it can be done.

Sam,

Click on this link and it will take you to the Toro site. Enter the model number of your tractor and you will find a free download of the transmission manual.

Toro Manuals

Bob

:thumbs:

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It looks like I am going to have to do the same thing, and do a complete rebuild on my 6 speed trans in my Raider 12. it has ran great for 38 years and i think i have an axel clip falling apart. as long as i have it apart i am going to relace all the bearing & seals.

Does anyone have the crossover numbers

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Steve, This is a fantastic post, and thread. It makes the rebuild look almost possible.

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Thanks Steve for the overhaul information and pictures,,,,I might need them. Pictures sure help a fella out,,,especially me. 

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