PTO Pump Problems

[MuncyBob]

Glad it worked out. Makes me feel a little better about referring to the manual's picture for a reminder of where to bleed from when changing the filter from even though I've done it several times already!

 

[atwood]

Atwood, You said that you replaced the relief valve that Terry sent you, was that the valve that they found bad. Something doesn't sound right. About the only to check a relief valve is to put a pressure gage on it and see if it relieves at the correct pressure. On a fixed relief valve, there is only one nut which is used to install the valve. On an adjustable relief valve, there is one nut to tighten the valve, and another nut to tighten the adjusting screw. If you turned the wrong nut, you would have messed up the relief settings.Glad every thing is fixed now. I would still recommend a pressure gage.

J.J. - The relief valve that Terry sent up was supposed to replace the PTO relief valve. Unfortunately I mis-understood Terry from the beginning and replaced the lift relief valve with this new valve. If I had understood better the location of these valves, I wouldn't have had to drive to Tazwell. The pictures in the manual or schematics are not that clear at least to me. Oh well, lesson learned the hard way. Not the first and most likely not the last.

 

[BobRip]

Thanks for relaying your experience in detail. I am sure this will be helpful to others. If PT had given you more documentation you probably would have replaced the correct valve. At least they were very helpful in getting your machine in top condition.

 

[kjm3232]

. I have a flash back to when changing the filter for the first time I was having a hard time remembering where Terry told me to thread the hose in for bleeding the system (9 months ago). I had thought it was pretty easy to get to so I remembered unscrewing one of the relief valves and realized no this couldn’t be it so I tighten it back down and proceeded to the cap on the side of the tram pump.

I have around 25 hrs on my 1430 and i know i'm going to have to remember where to attach the hose when it's time to to the 50 hr change. I think i'm going to call terry before i actually do it to make sure. It would be nice if they include in each manual a b/w picture with a arrow pointing to the place where to attach the hose so something like this doesn't happen to anyone else. For someone else who is a lot farther away and cant drive their tractor back to the factory it makes it that much harder for the person to troubleshoot. Now that i said that, I'm going to have to doublecheck the ops manual and see if they did or did not include a picture showing where to attach the hose.

 

[Gravy]

When you identify the right fitting, you might want to mark it with a bit of paint or some punch marks.

Gravy

 

[RegL]

. I have a flash back to when changing the filter for the first time I was having a hard time remembering where Terry told me to thread the hose in for bleeding the system (9 months ago). I had thought it was pretty easy to get to so I remembered unscrewing one of the relief valves and realized no this couldn’t be it so I tighten it back down and proceeded to the cap on the side of the tram pump.

I have around 25 hrs on my 1430 and i know i'm going to have to remember where to attach the hose when it's time to to the 50 hr change. I think i'm going to call terry before i actually do it to make sure. It would be nice if they include in each manual a b/w picture with a arrow pointing to the place where to attach the hose so something like this doesn't happen to anyone else. For someone else who is a lot farther away and cant drive their tractor back to the factory it makes it that much harder for the person to troubleshoot. Now that i said that, I'm going to have to doublecheck the ops manual and see if they did or did not include a picture showing where to attach the hose.

Are those relief valves adjustable?

 

[atwood]

Are those relief valves adjustable?

Apparently they are. The nut on top which I had mistakenly loosened is the adjustment nut. The two relief valves on the block are, according to Terry, adjusted differently. That is where my limited knowledge ends though. My advice don't touch them. Of course I'm a little gun shy or releif valve shy at the moment

 

[J_J]

Are those relief valves adjustable?

Yes, those relief valves are adjustable. You really should not mess with them unless you; have the equipment. Hydraulic pumps will have a max rating on them, say 3500 psi, so when you put a hydraulic motor in the circuit which has a psi rating of 2800 psi, you would want to set the relief valve at 2800 psi or lower to protect the motor. You can hear the relief valves come on and whine as you bog down the hydraulic motor, like in tall grass. Same thing goes with hydraulic cylinders, a certain psi relief is set for them., so you don't blow the seals. Basically, a relief valve is like a spring loaded ball on a seat. When the pressure builds up to the set pressure, it will start to relieve pressure back to tank. If you don't know what you are doing, you might set them to low and performance will suffer, or if set to high, a hose, cylinder, or motor will fail. Those relief valves are a cheap protection for the more expensive things like pumps, motors, and cylinders. Those manuals that PT puts out are a pitiful representation of what a proper manual should be. They have known this for a good many years. They could not get away with sub standard manuals if they sold to the Defense Department. What are they going to do if Terry quits. I can almost bet that every one that owns a PT has called Terry at one time or another to explain or clarify.things

 

[MossRoad]

What are they going to do if Terry quits...

They're going to call you!!!

 

[pah]

I think you belittle JJ's point.