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 02-19-2001, 16:19 Post: 24381
Rick Cosman



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 Hydraulic leaks

I had alot of work done including new Hyd oil and hoses. The ldr.and the Bhoe spool valves leak. Shop says he uses additive called Trans-X, sold at all Auto supplies. Claims it will not hurt anything and is worth a try before costly valve replacement. I am partial to additives and have had success with Risalone, and Marvel Mystery in older engines. I'm pretty gunshy about my tractor and I know how you experts caution about the purity and types of Hyd oil. Any thoughts? Thanks in advance. Rick






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 02-19-2001, 16:30 Post: 24383
Murf

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IMHO (as an someone who has a fleet of 8-10 compacts working commercially) I would be VERY cautious, from the name it sounds like something intended for an automotive automatic transmission, which is a VERY different creature from the hydraulic system on your compact. You do not say whether your machine is Hydro. or Gear, but it does not really matter that much. The additive may contain friction reducing components that would have a very UN-desireable effect on things like clutches and brakes. Check directly with the manufacturer of 'Trans-X' and find out what their Tech's say FIRST, if it is not suitable, they may have another product that will work even better. Best of luck.






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 02-20-2001, 11:57 Post: 24423
Rick Cosman



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Thanks Murf. I tend to agree. My Tractor is a YM 336D with power shift. I called Mfg. tech serv. (as you said) and surprisingly they said they had heard from several customers on this appl. , even though it is not on the can. They said it is completely compatible with trac. hyd. oil.I may work up the guts to try it... I'll let you all know. Would you consider a big drop every 8 to 10 seconds from the hoe spool valve alot? Loader is much less, but I HATE LEAKS. Rick






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 02-20-2001, 13:25 Post: 24426
Murf

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Rick, if it is dripping at that rate, no I don't consider it bad, if on the other hand you were describing how many FEET AWAY from the machine it is landing, then..... "Houston, we have a problem!!" If the only leak is from the spool valve then I would suspect an "O" ring was nicked during the work-over, or just general failure. At any rate a minor leak from the valve itself is VERY easy (read cheap) to fix. I'm with you, ANY leak is enough to make me crazy. Best of luck.






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 02-20-2001, 13:47 Post: 24428
Ted Kennedy



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Rick, there is also a possibility that you have a leaking/stuck partially open check valve. Most hoes for compacts and utilities have a combined valve body made up from the spool sections that control each function. These sections have a common hydraulic flow and are sealed with O rings. Sometimes during repairs the O rings become damaged and leaks occur between the sections. Each valve usually has a check valve and I have seen several that had become stuck and weep a bit. This can cause a temporary loss of function like you described. Good news is they only cost a few bucks. When you introduce any additive to a fluid under pressure, that is constantly heated and cooled, some form of chemical change takes place, and not always for the best. I think the only sure way to seal a leak under pressure is to make a mechanical (gasket, O ring, pipe thread sealant, etc.) type fix. Additives eventually breakdown and the problem returns. Bite the bullet now before it bites you when you can least afford it. Good luck.






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 02-20-2001, 15:24 Post: 24436
Rick Cosman



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Ted & Murf Thanks again; I agree with the aditive advice. The O-ring sounds very likely. Ted mine is the in-series assmly. you describe. But honestly, I can't take that apart myself. This tractor was in rough shape when I bought it. I got it cheap, put some $$$ in it and it has revived to my expectations. I have followed all you experts on this board and learned alot. Just to carry this to the end I bought some Trans-X and label lists among others the following:Stops leaks from seals in Hyd. control systems, construction equip., Hyd. pumps.,lifts,and accumulators. Would this sway you guys at all? Sounds so good I may take a spoonful myself! Shotcut Rick






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 02-20-2001, 23:05 Post: 24463
Roger L.



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 Hydraulic leaks

Rick, I am not really a fan of additives, thoughI agree with you on Rislene (Risalone?, Rislone? - how do you spell it?). It definitely fixed a sticky lifter in my chevy truck once. I like Marvel Mystery oil as well, though I don't think it has ever done anything positive except that the can looks so neat sitting on the shelf. I've also had luck with B&G's "posi-quiet" for slipping positraction and B&G diesel injector cleaner in my compact tractor's fuel. The posi-quiet gunk definitely worked; The injector cleaner might have helped....at least it didn't hurt.
Don't use any of these in your Yanmar 336D! Additives might be OK if the only thing rubber in the system was spool valve seals and hydraulic cylinders. And that may be the case on you backhoe if it is PTO powered. But your hydraulic oil for the loader not really hydraulic oil at all. It is trans/hydraulic fluied and probably in a common supply with the power shift transmission and the power steering. The power shift works by triggering a whole row of internal wet clutches in the transmission. You don't want to mess with their friction and engagement. Also, the power shift selector valve has lots of O rings and some rubber-faced valves. Hopefully you are scared enough now, so we don't have to mention the power steering........ Smile
I wouldn't be shy to try some sort of additive in the backhoe is it is the kind with a PTO-driven pump and separate reservoir....Wouldn't expect it to work, though....







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 02-21-2001, 05:15 Post: 24466
Ted Kennedy



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Rick, if you are looking for a go ahead, I just can't give it exactly for the reasons Roger has stated. The temptation is great to have a "fix-in-a-can" cure all, but I just don't like the idea of it flowing through the rest of your machine. While the additive may work OK on natural rubber or rubber based seals, there may be other compounds present in other seals/parts that won't take kindly to the additive. I'd try to locate another valve unit, used but in good shape, before I'd potentially harm the rest of the machine. However, if the hoe is a PTO unit, what the heck. And yes Roger, that red and black can of Mystery Oil sure does look good on the shelf! I've had mine in the family from the Korean War!






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 02-21-2001, 07:25 Post: 24471
TomG

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I have minor leaks around my loader control valves that are from fittings for the quick connects. I've tightened them till I'm worried about stripping threads. Pipe thread sealer probably would stop the leaks. There is a special type of sealer for hydraulic fittings, and I've had a tube for about a year. I don't like leaks either, and I don't suppose it's exactly to my credit that I put up with the leaks for several years. However, I guess all this is really incidental. What I actually wanted to say is that sealers used on hydraulic fittings should be specifically intended for hydraulic use. The use of Teflon tape isn't a good idea. Over-wrap of the tape on the inside of fittings can break off and end up clogging up something in the hydraulic system.






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 02-21-2001, 07:57 Post: 24472
Bird Senter

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 Hydraulic leaks

TomG, I'll agree with you about overwrapping and getting any pieces of teflon tape in the system, but used properly, I see nothing wrong with it. In fact, that's what my dealer recommended and what I've done.






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Discussion Boards > Active Subjects > Messages as Posted > Tractor Engine Repair Rebuild Forum

Thread 24381 Filter by Poster:
Bird Senter 1 | Murf 3 | Rick Cosman 5 | Roger L. 1 | Ted Kennedy 2 | TomG 2 |




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