504 hydraulic system gunked up

Matt1983 · Feb 26, 2012

I bought a 504 last year that has a loader on it. I have had to change the filters constantly and I have changed the Hi-Tran fluid several times now (which is ridiculously expensive)all because someone contaminated the system with junk and paint chips (I have no idea exactly what its contaminated with but it looks like paint chips and random dirt). The filters are a pain to change especially with the loader so I need to fit a filter into the system besides the internal filter. I've been considering where to put the filter inline and would like some suggestions. I bought a hydraulic log splitter filter which I think will work well, but it needs to be somewhere out of the way and somewhere that can be accessed easily.
On a side note I have considered running kerosene through the system to try to flush it but I'm afraid of ruining seals. Any ideas on how to flush a hydraulic system?

Anonymous-0 · Feb 27, 2012

you should be able to remove the pto and clean out the rearend compartment which is the hydraulic reservoir. Maybe you could rig up a filter on a pump and pump your old oil back in through a filter after you clean the reservoir.

Matt1983 · Feb 27, 2012

That"s great advice. Thanks. I will remove the pto and clean that thoroughly. I think I"m going to replace the oil this time though because it has gotten some water in it. I plan to keep it tarped after I fix this problem. Just curious, do is there a gasket that I will need to replace after i remove the pto?

mkirsch · Feb 27, 2012

Do you know if this tractor was ever subjected to a full-on teardown, and a part-by-part repaint?

If so, sounds like someone painted the inside of the transmission housing, which was a BAD idea.

Hopefully you can flush the crap out by removing the PTO and spraying down the inside of the housing using a pump sprayer and kerosene (just don't light a cigarette). But, if multiple oil changes haven't cured the problem, you may be chasing your tail for a while.

Matt1983 · Feb 27, 2012

I don't think it was ever torn down and rebuilt just
by the condition of the tractor when I bought it.
But I don't know much background on it so maybe at
some time.... I think the pto flush idea is the way
to go and I assume I will have to keep flushing the
oil but that's a great way to eliminate some of it
at least and its a good place to start.

504 hydraulic system gunked up

Matt1983

Member

Anonymous-0

Well-known Member

Matt1983

Member

mkirsch

Well-known Member

Matt1983

Member

Similar threads