DernHumpus
New User
I bought a 401B a few months ago and after about the first few hours of operation I have started experiencing stuttering hydraulics. This is occurring in seemingly random locations, from steering, 3pt, to the loader and sometimes it loses ability to move. This also occurs with the loader removed.
The previous owner said he had put a high pressure pump in it, so I contacted him. He suggested I try a hydraulic filter. This seemed to fix it, but I also installed it when the tractor was cold. (and I have done this a few times assuming I was plugging filters since it is easy and cheap and the brake linings are known to come apart and plug filters).
Now that it is hot out this has started to happen more and more frequently, and closer and closer to the time that I first start the tractor. I did quite a bit of reading today on "sister" tractors - I think the 2630 would share symptoms, and here are my other observations:
1. Used hydraulic filter is clean. I only cut open one because it was a PITA.
2. No spray or mist observed through the 3-pt oil fill cap
3. Transmission strainer is clean
4. New transmission oil (about 5 gallons came out and was replaced)
5. Today, I installed a pressure gauge at the oil filter housing, I think downstream of the filter, but after a few minutes of operation it dropped from 200 to 100 psi and the hydraulics quit working. Usually if you shut the tractor off and restart it the hydraulics work for a short period, say, long enough to limp it into the barn.
Now, I am about 80% sure it is the low pressure pump. Does anyone have any comments, input, or support before I go ahead and split the tractor?
Shouldn't my pressure relief be set to 150 psi and not 200 psi? I am suspect the previous owner knew he mis-diagnosed the high pressure pump and sent it down the road.
Thanks,
Dan
The previous owner said he had put a high pressure pump in it, so I contacted him. He suggested I try a hydraulic filter. This seemed to fix it, but I also installed it when the tractor was cold. (and I have done this a few times assuming I was plugging filters since it is easy and cheap and the brake linings are known to come apart and plug filters).
Now that it is hot out this has started to happen more and more frequently, and closer and closer to the time that I first start the tractor. I did quite a bit of reading today on "sister" tractors - I think the 2630 would share symptoms, and here are my other observations:
1. Used hydraulic filter is clean. I only cut open one because it was a PITA.
2. No spray or mist observed through the 3-pt oil fill cap
3. Transmission strainer is clean
4. New transmission oil (about 5 gallons came out and was replaced)
5. Today, I installed a pressure gauge at the oil filter housing, I think downstream of the filter, but after a few minutes of operation it dropped from 200 to 100 psi and the hydraulics quit working. Usually if you shut the tractor off and restart it the hydraulics work for a short period, say, long enough to limp it into the barn.
Now, I am about 80% sure it is the low pressure pump. Does anyone have any comments, input, or support before I go ahead and split the tractor?
Shouldn't my pressure relief be set to 150 psi and not 200 psi? I am suspect the previous owner knew he mis-diagnosed the high pressure pump and sent it down the road.
Thanks,
Dan