Problem on cross valve body

[tbutcher]

I just finished restoring a Ford 850 with a Wagner loader. It has a Cross 3 spool control valve. Everything works, but when not using any hydraulics, the hose to the control valve vibrates like crazy. I am told that it is building pressure and that something is either clogged or it is not by-passing effectively. The same hose also seems to get warm very fast. Any ideas on where to start looking?

 

[RickB]

Look for a plugged suction filter.

 

[J_J]

Well, just put a hyd gage in the system. You should have very little pressure, if any, with all valves in neutral.

 

[tbutcher]

Problem solved. Someone had replaced the original pump with one that is at least twice the size as it should be. Although I could not tell for sure, the oversize unit may have been producing 30 to 40 gpm. The local New Holland dealer had a new one for under $300.00 and the loader works perfectly.