To20 hydraulic mystery

Kevin76

New User
My 3PH would only lift about 200 lbs. So I rebuilt the pump.New controlvalve,saftey valve,pistons,valves,etc.Still wouldn't lift. So I replaced valve chambers with new valves, still won't lift over 200lbs.I see no leaks from the cylinder.Bush hog will lift if you physicly lift it while raising hitch. And it barely drops overnight. Any help would be much appreciated!!
 
(quoted from post at 08:46:19 07/15/18)
Have you checked the O rings at the top of the riser tube ?


I have not pulled the top cover. But I assume since I see no leaks that they are fine.
 
I'm only familiar with TE20s though they should be the same . Remove side cover that the dip stick is in and look carefully with a torch up into the top rhs of the casing. A leak will show up as a shower of fluid when the pump is running under load . No need to tell.you not to put your hand in is there ?????
 
I'm only familiar with TE20s though they should be the same . Remove side cover that the dip stick is in and look carefully with a torch up into the top rhs of the casing. A leak will show up as a shower of fluid when the pump is running under load . No need to tell.you not to put your hand in is there ?????
 
I'm only familiar with TE20s though they should be the same . Remove side cover that the dip stick is in and look carefully with a torch up into the top rhs of the casing. A leak will show up as a shower of fluid when the pump is running under load . No need to tell.you not to put your hand in is there ?
 
I will look again today. I have looked at everything so much not sure what I have looked for and have not anymore!! LOL.Would I be better off rebuilding the whole top assembly? Do they sell entire kits for that?
 
(quoted from post at 17:45:54 07/14/18)Bush hog will lift if you physicly lift it while raising hitch.

Can you clarify what you mean by the above sentence? "Bush hog will lift if you physicly lift it while raising hitch."

Do you mean that if you provide a little extra help then the hydraulics will do the rest and lift the bush hog? i.e. will it end up lifting more than 200lbs if you are somehow lifting/bracing/adjusting the load manually?

My mower is many hundreds of pounds so there is no way I could "help" it up without the hydraulics doing most of the work. (more than 200lbs worth) So if that is what you mean, then I begin to wonder about some problem somewhere in connections between the top link and the internal lift mechanism.

I'm thinking as I type here so I may be off base....(which is common for me) ... but....the draft control linkage does create a bit of a feed back. If I have the back blade hooked up and then crank on the top link to adjust the angle, while doing so it will often cause the arms to jump up (or down) as I push or relax the pressure on the top link. So what if I lifted the load a little and then that was enough to compress the top link, trigger the draft control, raise the arms, etc....... The hitch would do the lifting, I just had to keep the implement angle enough to keep the draft control mechanism pushed in....

OK, so probably I'm way off base on my thinking but I was wondering what your sentence means.

Hope you get this working soon.
 
Yes I can take some of the weight by lifting the bush hog manually.Or if I run the bush hog up or down a hill with the lever raised it will go up as the hill pushes it up. As far as the draft spring I can turn it by hand with the implement raised. I have adjusted the top link a few ways but did not seem to matter for lifting
 

Have you adjusted the quadrant ? the position of this is critical and also necessary after a pump or lift cylinder change or repair . There are some fairly clear instructions in the manual for the TEA , I would suspect the same goes for the O models .
 

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