Re: 340 hydraulic valve problem

Posted by tesmith66 on May 01, 2009 at 06:46:35 from (130.76.96.19):

In Reply to: 340 hydraulic valve problem posted by rumplestiltskin on May 01, 2009 at 06:38:25:

rumplestiltskin said: (quoted from post at 06:38:25 05/01/09) I didn’t see that exact symptom in the troubleshooting section of the manual. This is the closest thing: Condition: Control valve cannot be readily moved from neutral. Causes/Remedies: 1 – Control valve gang retaining bolts (i.e., valve mounting bolts) and stud-nuts too tight, pinching valves in valve bodies. / Loosen retaining nuts and bolts. Re-torque to 25 ft-lbs. 2 – Control valve linkage binding. / Check and free up all hand levers and linkage. 3 – Orifice in upper unlatching piston plugged. / Dismantle control valve, clean thoroughly, renew gaskets and seals. 4 – Control valve and body scored. / Replace old valve with new. Check system for dirt, abuse or cause of failure. I hope this helps (my money’s on #1 above). Mark W. in MI

Thanks a bunch! My bet (hope) is on #3, actually. I havn't laid a wrench on those since I've owned this monster, but I had just topped off the hydraulic oil about 15 minutes prior to the failure. I may have stirred up some gunk between the filter and the valves. It's just kinda weird that it worked flawlessly one second, than nothing. I removed the linkage and worked the valve by hand. All I can get is neutral and down. There is something very solid keeping the valve lever from moving past neutral to the up position. So... either it's dirt or a mechanical failure inside the valve. Gonna find out tomorrow morning.

Thanks again for looking that up!

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