John Deere 2355 hydraulics

Plant Doc · Feb 11, 2023

I have a friend's JD 2355 in my shop because the pto ran continuously. We split tractor at trans and replaces the pto clutch pac. The owner said as long as we
have the tractor in the shop we should look at the hydraulics as they seemed very weak. This is a second hand tractor that I assume was a county owned tractor
because of the markings still visible here and there. I am guessing it had a loader on at some point and the hydraulic high pressure line was plumbed into the
priority valve and the return was plumbed into the hydraulic filter housing. When the loader was removed, instead of capping the high pressure and low pressure
lines, someone just made a loop and plumbed the high pressure line straight into the hydraulic filter housing. My question is wouldn't it now pump oil
continuously and rob pressure from the system causing other hydraulic problems?

Jim.ME · Feb 11, 2023

(quoted from post at 09:54:31 02/11/23) I have a friend's JD 2355 in my shop because the pto ran continuously. We split tractor at trans and replaces the pto clutch pac. The owner said as long as we
have the tractor in the shop we should look at the hydraulics as they seemed very weak. This is a second hand tractor that I assume was a county owned tractor
because of the markings still visible here and there. I am guessing it had a loader on at some point and the hydraulic high pressure line was plumbed into the
priority valve and the return was plumbed into the hydraulic filter housing. When the loader was removed, instead of capping the high pressure and low pressure
lines, someone just made a loop and plumbed the high pressure line straight into the hydraulic filter housing. My question is wouldn't it now pump oil
continuously and rob pressure from the system causing other hydraulic problems?

I would say they should be capped. You could install quick disconnects as caps then he would have the capability to just plug in a loader or other attachment controlled by an independent valve if he wanted.

Fixingfarmer · Feb 11, 2023

Pictures might help. That would be exactly what one would think would happen. I know my 2555 has a 4 quick coupler setup made for the loader that gets disconnected and plugged with rubber caps and thats it no jumper hose but if someone has robbed the loader and valve and was just trying to cap stuff who knows...I guess you could try unhooking it and see what happens assuming you have a scv return to filter or case still hooked up it shouldnt hurt anything being its a closed center system it wont continuously pump till something blows. Just try it at low idle and watch for leaks at that quick coupler.

Tx Jim · Feb 11, 2023

Closed center hyd ports on tractors such as JD 2355 should definitely be capped not looped pressure to return. Looping pressure to return yields a high pressure internal leak which will lower hyd performance & heat hyd oil

Plant Doc · Feb 11, 2023

Thank you everyone for your replies. I will cap the lines Monday morning. If it doesn't work I will get back to you. Thanks again

UncleTom · Feb 11, 2023

When i worked for the county parks we had a JD tractor very similar.. I think it was a 2355. On ours we had many different drivers of the tractor. When the parking brake was used people would forget to take it off and the tractor would move effortlessly and the brake band would wear into the steel counter part and put junk into the system so bad it would plug the screen and filter. I have changed the filter under neath many times.

John Deere 2355 hydraulics

Plant Doc

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Jim.ME

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Fixingfarmer

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Tx Jim

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Plant Doc

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UncleTom

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