jp2code
Bronze Member
In the image below, taken of the underside of the floorboard on my Kubota L4400, there is a stainless steel hydraulic line that is shaped like a P trap that you would find under the sink in your bathroom or kitchen:
That P pipe has a bad habit of getting hung on tree limbs and stumps. One side mounts with a big banjo bolt that takes a 1-inch wrench and the other side has a single o-ring that slides into the block housing. When it gets hung up, it yanks the pipe out, bends it, and drains all of my hydraulic fluid. Further, the hose is no longer useable because I have no way to get it bent to the right angle.
Coleman Equipment sells them, and there is a diagram of it below, listed as number 170:
REFERENCE: Parts for Kubota L4400DT 4WD Tractors | Coleman Equipment
Last year, it was yanked off, I replaced it. To get the new p-pipe on, I had to loosen the manifold assembly at # 010 above so that the p-pipe could slide into the casing and onto the manifold assembly. I put 10 gallons of clean hydraulic fluid back in the tractor, cranked it up, and it still leaked all over the ground from the little o-ring at #200 above. When I tried taking it apart to reseat it, there was no way to keep 10 gallons of hydraulic fluid in the tractor, so I took it to the local Kubota shop where they took care of it for me (for a fee, of course). They told me afterward that I did not have the o-ring seated.
This year, I hung another limb, root, or stump, and the p-pipe was yanked out again. I ordered the part again with a new o-ring, paid extra attention to get the o-ring seated in there and not in a bind in any kind of way. There is no way to test it until the hydraulic fluid in there, so I filled it with 10 gallons of clean hydraulic fluid (Mind you, this stuff isn't cheap - that's over $100 worth of hydraulic fluid).
When I cranked the tractor, the same part is leaking again, and I know I took special care when installing it this time.
Does anyone know if there is a special trick to getting this p-pipe inserted?
And, does anyone know of a special guard I could get to protect this crucial piece of my little tractor?
That P pipe has a bad habit of getting hung on tree limbs and stumps. One side mounts with a big banjo bolt that takes a 1-inch wrench and the other side has a single o-ring that slides into the block housing. When it gets hung up, it yanks the pipe out, bends it, and drains all of my hydraulic fluid. Further, the hose is no longer useable because I have no way to get it bent to the right angle.
Coleman Equipment sells them, and there is a diagram of it below, listed as number 170:
REFERENCE: Parts for Kubota L4400DT 4WD Tractors | Coleman Equipment
Last year, it was yanked off, I replaced it. To get the new p-pipe on, I had to loosen the manifold assembly at # 010 above so that the p-pipe could slide into the casing and onto the manifold assembly. I put 10 gallons of clean hydraulic fluid back in the tractor, cranked it up, and it still leaked all over the ground from the little o-ring at #200 above. When I tried taking it apart to reseat it, there was no way to keep 10 gallons of hydraulic fluid in the tractor, so I took it to the local Kubota shop where they took care of it for me (for a fee, of course). They told me afterward that I did not have the o-ring seated.
This year, I hung another limb, root, or stump, and the p-pipe was yanked out again. I ordered the part again with a new o-ring, paid extra attention to get the o-ring seated in there and not in a bind in any kind of way. There is no way to test it until the hydraulic fluid in there, so I filled it with 10 gallons of clean hydraulic fluid (Mind you, this stuff isn't cheap - that's over $100 worth of hydraulic fluid).
When I cranked the tractor, the same part is leaking again, and I know I took special care when installing it this time.
Does anyone know if there is a special trick to getting this p-pipe inserted?
And, does anyone know of a special guard I could get to protect this crucial piece of my little tractor?
