joelk Posted May 4, 2011 Posted May 4, 2011 Just added a Hydro lift to my 3212H and have a question. When I pull back on the lever to lower the deck and then let it go back to center slowly, it occasionally will stop just short of the middle and keep applying downforce. If I bump it a little it is fine. It's as if there is a slight detent keeping it from returning all the way. Is there any adjustment to get rid of this or is it just a wear item?
perry Posted May 4, 2011 Posted May 4, 2011 the handle should spring right back to the hold position. there is a pin you can see that go's up and down behind the handle. dont remember the name of it, but it might be sticky if the lift has sat idol for some time. i dont know too much about them. i have only had to fix the lift rams. http://bsintek.basco.com/BriggsDocumentDisplay/default.aspx?filename=heCBEN8aqO5rE3Cvh5kbp796Dq
BMinor8806 Posted May 4, 2011 Posted May 4, 2011 The spool (as the pin is called) is spring loaded inside the handle. I had the same problem but mine was easy to fix, there's is a small snap ring on the center pin and a large one that keeps the spool in the valve assembly. Mine was missing the small snap ring which wouldn't let it spring back to the hold position. Remove the hydro pump and check that first if not PM me and I can take you through a valve rebuild. Brandon
joelk Posted May 5, 2011 Author Posted May 5, 2011 Thanks for the replies. I didn't see the snap ring on the manual. In order to check this I need to remove the valve body (which is screwed onto the pump with 4 bolts and remove the main spool valve? And on that spool valve is where the two snap rings should be? Is that correct?
BMinor8806 Posted May 5, 2011 Posted May 5, 2011 You just need to remove the pump from tractor (3 bolts in bulkhead) and take the lines off. There should be a large outer snap ring and a small inner snap ring. Easily replaced when the whole pump is removed. There should be two you will see the smaller ridge on the spool when you remove the pump.
joelk Posted May 9, 2011 Author Posted May 9, 2011 Well I got it apart and both snap ring are in place. I took the spool valve apart and the large spring that should return it was rusty. I cleaned out the rust as best I could and put it together. It is still weak returning to center. If I let it flop it does ok, but if I slowly let it return it will stop short of the center. Do you think it is possible that the spring is weakened over time? Or is it possible the orings are binding too tight to the valve? Give me your suggestions before I put it back (need to cut grass again soon). Thanks for your help.
BMinor8806 Posted May 9, 2011 Posted May 9, 2011 The spring should easily return it to center. I would disassemble the entire valve and clean it thoroughly. Then install new O-Rings and reassemble and it should work properly. Good Luck!! Brandon
joelk Posted May 11, 2011 Author Posted May 11, 2011 Got it working pretty well. I took some fine emory cloth to the spool valve to get it shiny and smooth. I replaced one of the orings on the end of the valve body, the other one is farther inside the body and I was afraid I wouldn't be able to get it seated again if I took it out. I poored some 10-30 oil through the valve body to get out any small particals and help lube it, and finally re-adjusted the stops on the quadrant. It works very well. Good to go - Thanks for your help.
perry Posted May 12, 2011 Posted May 12, 2011 good to hear you got it. thanks for posting the results . sm01
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