Hydro leak??
 

I’m new here. Need knowledge on my tractors. My 682 red cub leaks some hyt-ran after it’s shut down. Appears to run out the filter near the rubber gasket seal. Nowhere else do I find fluid. It’s only about a teaspoon at a time. Please advise me where and what to do. I’m sure I’m not the first to have this.

If it's leaking at the filter, I'd just replace the filter and see if that fixes things?

I’m sorry I forgot to mention, I’ve replaced the filter and done a fluid change.

I was wondering if this is where I’d find evidence of the notorious cork gasket leak?? When that happens, where does the leak appear??
I should also state- I just acquired this tractor, along with its maintenance records from an estate. So I can see a bit of what’s been done.

Welcome to the forum!
Yep, at least change the filter.
Make sure the mating surface to the filter gasket is nice and smooth.

With filter removed, look very close to the surface of tranny above the filter.
The actual leak might look like it is coming from where the filter seals on the tranny but it might be coming from above and running down and around the filter.
Could be a leak at input shaft seal #47 or less likely #43 O-ring.
Filter screws onto #28 nipple.

Thank you.
will fluid need drained from rear to remove and inspect around/above it?

I would just do the same as you did for the filter change.

I would carefully turn the filter 180 degrees trying to only disturb the dirt that is on the filter, on the very end.
In doing so you might be able to see a drip spot that is a bit cleaner then the surrounding area on the filter can.

If leaking from the input shaft seal, every time it drips while running the cooling fan is blowing the drip elsewhere.

Cork gasket is between the hydro unit and the rear end. Yes, the fluid has to be drained to change it, but iF it was leaking there, it wouldn't be on the filter.

Take the tunnel cover off and power was the hydro. Don't do it while it is hot. Look for the leak then. Should be obvious once you clean it up.

I had to do the infamous cover the hydro in baby powder and watch to see where the leak comes from. Found my cork gasket and the relief valves were both leaking which made it harder to figure out otherwise.

I thought you could roll the rear out and flip it up with the pump on top and change the gasket with the rear still full of fluid? Least that's how I think I've done it before.:bigthink: Regardless, I'd pull the tunnel cover give it a bath and go in the house. When its clean and dry you should be able to find all the leaks and determine how many of them are worth the headache. By the way, now is a perfect time to address trunnion wear and check the condition of the driveshaft at each end.

I’m such a newbie I don’t know what a trunnion is. I have a feeling I might learn. I can definitely do the “ clean it up, dry it up, find the leak without the tunnel cover on it” part.

Yes, I suppose that you can. But unless the fluid is new, it's a good time to change it. :beerchug:

Basically all the "full size" hydro Cadets suffer from wear an tear of the trunnion. This more or less is the external components that help with smoother starts and maintaining constant speed. My analysis of it function may be off a bit, but that's pretty much what it does. There are a couple springs and pins that get worn/broke/disappear. $25 will buy all 4 from a dealer (I think). Thing is you have to have the rear out to change them. Very simple with the rear out. Then comes the wear and tear. The slot these fit in gets worn really bad to the point it sometimes needs attention. Also shim washers are used to take up wear. Its just a good topic to read up on, Several folks here have posted about their adventures repairing these. Not saying yours needs anything, but its one of those things that is easy to fix while the rear is out, not much more work involved. Same as inspecting the driveline, old age they wear out. Problem is tearing it down, ordering parts, and getting it all fixed before your grass needs cutting again--that's a parlor stunt for anyone! If nothing else, find your leak, determine if its bad/urgent enough to fix now, and spot check the other items. You may be pleasantly surprised you have a solid machine, or you may say how in the crap did I finish mowing last time. Four little screws in the tunnel cover and you'll learn a lot about your machine. FYI, those are an "odd size" screw, I think a #12. That's why so many people put the wrong thing back in when they lose one.

Good luck, let us know what you find. A little slop here and there is normal for the driveshaft and trunion. Post pics if you can, we love pictures!

Hopefully I get these pics on here for all to see

It’s at the input shaft. Leaking onto the filter and running around the filter to the bottom. Per the diagram I’m thinking #47 seal ??
Can you all see it ok?

It’s literally dripping from the bottom of the input shaft as it spins. That’s #47 correct?? Can someone tell me a part number please.

Also I’m going to be doing Trunnion work.

Your talking about those specs on the filter?
How many minutes of total run time since the filter was installed or powerwashed?

And it would appear that the input seal housing has been removed at least once before.

Look here for the seal: https://www.partstree.com/parts/cub-...-transmission/

I changed the hy Tran fluid when I got it a couple weeks ago. About 3 hrs working since then.
Yes part numbers are in reference to the diagram. I see it’s a lip seal. Looks like cub number 921-3032. Think I found it on cc specialialties web page. What all has to come apart to change it?

Does someone have a link of pics or video showing this seal getting changed?

I'm not sure I know how to post links, but try this one.

http://www.onlycubcadets.net/forum/s...ad.php?t=51941

That’ll help a lot. I’m gonna start a thread with my Trunnion pics too.

Can someone share the lip seal part number that fits 682 please

Go to cubcadet.com to look it up. You can look it up just like any of us can.:beerchug:

try this
 

http://www.partstree.com/parts/cub-c...arden-tractor/
Scroll down to hydrostatic transmission.