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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Re: 550 Oliver

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10-20-2013 08:42:29

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While I agee with rrlund and others that this thing seems cobbled in the way it was plumbed originally; the fact is that it did work that way for several years.

Out of curiousity did this problem happen immediately after you installed that quick coupler in your one pic when you made that hose repair?

If yes, then my guess is that the ball in the Pioneer quick could be acting like a check valve. Some of those quick coupler fittings are only designed to flow one direction. Simply exchange the fittings. In other words move the Pioneer male to the female location and move the Pioneer female to male location and see if operation returns to normal. This switch is easy and will take less than 5 minutes. If it still does not work properly, but your symptoms change from current status in some way then my guess would be to eliminate that quick coupler and install a simple union there that will allow flow in both directions like you had before.

If the problem did not happen when those fittings were installed then disregard my recommendation entirely and re-plumb as instructed by the other guys posting in this thread - your are lucky in that several knowledgeable people are posting replies.
This post was edited by rankrank1 at 08:50:20 10/20/13 2 times.

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Wayne Six

10-20-2013 10:15:59

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 Re: 550 Oliver in reply to rankrank1, 10-20-2013 08:42:29  
Bought tractor in summer of 1999...bucket has always gone up fine. I always thought it went down slower than it should but things were working so I left it alone. Bucket started going down slower and slower over the years...hard to back track to a time line, but the more I think about it am pretty sure it really got worse when I blew that hose and put that quick disconnect in because I remember being concerned that it might be a result of getting air trapped in the system and I needed to bleed it off some how....never did figure out how to do that other than leaking some/fluid and air out of the furthest fitting from the controller.
I think you may have hit the nail on the head....perhaps getting rid of the quick disconnect AND rebuilding the controller are the answer. Controller has the horizontal lines of the Gresson 300 that was mentioned, need to remove a half inch of paint to see if I can find any other marking so I can get a diagram and rebuild kit... Wow, this is great..sure wish I could get on this ASAP, but have some medical stuff scheduled for this week...going to be a long week waiting for tests results AND waiting to check out this theory on the dang thing...thanks for the second, third, fourth, fifth, etc., sets of eyes and all the recommendations...sure know a whole lot more about hydraulics than I when I started out. Thanks a lot to all, will let you all know the final chapter.....

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10-20-2013 11:34:27

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 Re: 550 Oliver in reply to Wayne Six, 10-20-2013 10:15:59  
Wayne,WHY are you so intent on opening the valve up until you replumb your cylinders like rrund said and see what you have then.You are trying to make a mountain out of a molehill.15-20 and you will know.

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Wayne Six

10-20-2013 13:49:23

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 Re: 550 Oliver in reply to massey333, 10-20-2013 11:34:27  
Certainly did not mean to offended anyone. Tractor and front end loader has always and is still going up just fine, no twisting or jerking, etc.... Mr. Lund was pretty clear that there was no way that it could work at all the way it was plumbed with the type of valve he presumed it to be. It has been getting worse and worse about going DOWN over the years but still goes up, and lifts huge loads, just fine. So reading all the thought was I may well have two problems...the quick disconnect may be in backwards. Got it at Tractor Supply and do not recall seeing any sort of installation directions/guide..seems like it may have been the last one and stapled shut if I remember right...if it is and when I reverse it, it starts going down again...really, really slow like it was before it stopped going down at all....well, strikes me the next step would be getting a rebuild kit....and if that does not work, probably replace the controller. Just my thought process....certainly didn't mean to appear to be unappreciative...again, my thanks to all and my apologies to anyone that has taken any offense.

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10-20-2013 17:31:03

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 Re: 550 Oliver in reply to Wayne Six, 10-20-2013 13:49:23  
Wayne, you can buy a swivel fitting to put in there in place of the Pioneer coupling if you have a hose that doesn't have swivel ends. It's just a little fitting with male threads on one end and female on the other and it swivels. It's cheaper than a Pioneer, gives a lot less trouble, doesn't impede flow, and it isn't prone to dripping and leaking. Jim

edit; I looked at the pic of the valve again and there is a swivel at the valve on one of the hoses coming up from the pump/reservoir. Get one of those and put the Pioneer coupling on the shelf somewhere. I still can't figure out how that thing works if it's plumbed at the bottom of the cylinders the way I think it is.
This post was edited by fixerupper at 17:51:56 10/20/13.

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90 Percent Retired

10-20-2013 14:54:15

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 Re: 550 Oliver in reply to Wayne Six, 10-20-2013 13:49:23  
On most valves of that type, the spool and valve body are a matched pair, and not repairable, only seals, "O" rings and springs can be replaced. My only suggestion is to remove the end cap, opposite the handle end, and check for rust, and corrosion of the centering spring as that could cause the spool not to center and not let it (the spool) move far enough to allow normal lowering speed. Otherwise just replace the valve. What you need is shown on the link below.
This post was edited by 90 Percent Retired at 14:55:14 10/20/13.

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10-20-2013 11:48:08

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 Re: 550 Oliver in reply to massey333, 10-20-2013 11:34:27  
I give up. I don't need to bang my head against the wall over somebody else's stubbornness.

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pete 23

10-20-2013 20:31:28

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 Re: 550 Oliver in reply to rrlund, 10-20-2013 11:48:08  
Some times you just have to walk away. Years ago fellow calls me out to his corn planter hooked up to his 756 Farmall. Says it worked fine lifting yesterday but today it will not. I said you have the hoses hooked up wrong. He had a Case tractor near by and on them the couplers are positioned top to top and so he had hooked the IH that way. I unplugged the one hose and plugged it into correct coupler and it worked fine. He still did not want to believe me as it had worked fine day before. I figured out he actually had the one valve in float position and was using the other valve to raise and lower. I don't think he ever did believe me that he had hoses hooked wrong. His wife did though.

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10-20-2013 12:08:27

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 Re: 550 Oliver in reply to rrlund, 10-20-2013 11:48:08  
This whole post has been a good on-topic discussion about hydraulics on a TRACTOR, of all things. I've enjoyed every minute of it. I think all of us would like to meet at the site where the tractor actually sits, with our wrenches in hand. Jim

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10-20-2013 13:13:44

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 Re: 550 Oliver in reply to fixerupper, 10-20-2013 12:08:27  
Ya I would. A pipe wrench and Cresant wrench and we'd have it going in no time.

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