Fixed PTO Problem - not what I expected

[J_J]

Carl,
The 2 micron debris that people worry about is 2 micron debris hard enough to scratch steel, seal surfaces, and bearings. I suspect that your debris is from dead and dying hoses, which means it is hard rubber. Probably less worrisome than sand, but underneath that rubber is going to be steel wire mesh. When it start rusting, or fatiguing off, you'll have debris hard enough to cause wear in critical areas.

I'd get moving on replacing the rest of the hoses, and then 2 micron filter the whole tank, run the tractor for a bit, and do it again.

J.J. Are you thinking of suction filters for all pumps? Or pressure side filters for all the pumps?

All the best,

Peter

Peter,

Those small micron particles are the ones that causes wear on most surfaces of pumps valves, and motors. Pt [half assed] only put the filter on the charge pump, which is only pumping about 10 % of the pump capacity, and that is assuming that you are using the wheel motors. It would be interesting to put a gpm gage in the tram circuit to figure how much fluid is being filtered. It would take a while to filter the contents of the tank, if you were driving slow. The PTO pump and the steering and lift pump is just circulating fluid from the tank around the circuit and back to tank. From this you could say that the tram pump gets the most clean fluid, and that is only filtered to around 10 microns. These external filters, that some people have built, some as small as 1 micron. is the best way to go, and that should be at least weekly. Correct viscosity is important and is usually dictated by the area that one operates.

I think Carl had mentioned about some wire debris in his PTO valve, so that is a positive indication that the hoses are breaking down. Of course you have to wonder if the hose technician cleaned out the hose after he cuts through the rubber and wire to make up a hose. Sometimes you can see them make up a hose and sometimes not.

 

[woodlandfarms]

Just to clarify, I did not find any wire debris, just the plastic liner. It was so hard,and the way it was broken, it must have come / be coming from old hoses. Now, I used the old stiff hoses to pull the new hoses through. I never tthought it out, but it is quite possible that oil with broken bits got into the new hoses.

I have watched my hoses getting built from the pro shop and they do it right, they use those mice thingys. I am not so sure about NAPA but they no longer build my hoses....

 

[Wayne County Hose]

The inner liner of your most common hydraulic hoses is nitrile. The covers are neoprene. 2 different materials, one on the outside exposed to the elements, the other on the inside bathed in oil. I've been paying attention to the old hoses that come into my shop for replacement since Carl and I had a discussion about this some time ago. I have not seen any brittle inner liners. I'm not saying it can't happen, just that I haven't seen any.

I would be careful about adding extra filtering, especially 2 micron filters. Make certain that the filter block has a bypass valve. Remember, the finer the filtering, the more restriction. I would get a good filter block and filter rated for the aux. hydraulics flow and hook into the hydraulics kind of like a kidney machine. Every 50 hours or so, with the machine running to circulate oil, hook up the filter and let her go for a half hour or so.