Hydraulic question

tb72 · Apr 26, 2016

I am pulling a 630 disk with a 4440. I am having issues with the lift cylinders getting out of sequence. The wings are not going down as much as the center. I ended up bleeding the lift cylinders on the wings, and that seemed to help, then the next day when I started up again the problem was back. I bled them again and it was better but this should not need to be a daily routine. any ideas what is going on, or what might be wrong?? Thanks.

newgenjdcollector · Apr 26, 2016

I have ran one of those disk before and if you make a bunch of turns and only raise the disk up part ways, then this can happen. For me, all it took was to raise the disk ALL the way up once in awhile and hold the lever till it levelled out. The wing cylinders on these disks are fed by the inner cylinder, ie in series. I imagine that once the o-rings on the rams wears, it lets oil bypass and that is what causes it. The only other thing you can do is re-plumb the cylinders and put them in a parallel circuit instead. That would take care of the problem but the disk would lift a bit slower.

tb72 · Apr 27, 2016

I have been lifting all the way up, and holding the lever, but it makes little, if any difference. Maybe I should try the parallel circuit plumbing.....not sure if I can get it done this spring, but perhaps a summer or next winter project. Thanks

Tx Jim · Apr 27, 2016

I think packing has failed in rephasing cylinder. Which diameter cylinders does your tandem have?

Hydraulic question

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