The pressure gauge showed up to 1600 PSI which is what the owner's manual says is the high side on tension. Took it out and made a bale.and it worked great. Put on new gauge and toyed with possibility of converting the baler back to the original style of hoses that connected to the lift gate supply but since all the stores were closed I just reassembled it and FILLED THAT SYSTEM TO THE TOP with hydraulic fluid. Didn't have a clue if any of the hydraulic tension thing was working because the gauge was so clouded as to be impossible to read. Same as yours, Teledyne with a 'preset at 1000 psi' metal tag on it. I thought the bales sould be tighter so I figure its time to attack the hydraulic tensioner. (Like I said I'm just starting to learn about these.) After the first two little pastures and those 16 bales it was time to focus on "what's next". Ok so this is over the course of experimenting with 16 bales. I was happy.Īfter a liberal dose of chain lube it worked even better.Īfter the inside walls started to shine up it it worked even better.Īfter I replaced the broke and missing pickup teeth it worked even better. Come spring (after the belts started moving) it made hay. (Disclaimer - I really know nothing about these things but I'm learning)īought a used 605F in January. Sorry this isn't a direct answer to question but maybe it will help. In Reply to: Vermeer baler hydraulic pressure regulator posted by t.eden on Jat 18:35:45: I know my operating theory is correct for the 678 model, and my details are accurate as well in that there is no connection between the density and gate lift circuits after a check of the 678 parts catalog.Re: Vermeer baler hydraulic pressure regulator I should state that the NH 6' balers with two density cylinders (678, 688, etc) have a somewhat different system than the 4x5 balers (644, 648, etc) that are nearly the only ones we sell and I have experience with. Gotta be in the valveĮdit: Cylinder #2 in the photo is the RH gate lift cylinder. And it is highly unlikely that BOTH cylinders suffered some type of failure that would create the symptoms. I can't imagine anything going wrong with one cylinder that would (a) keep the cylinder from retracting when it extends normally, and (b) not twist the crap out of the pivoting belt carriage inside the bale chamber. The symptoms indicate the valve isn't allowing this free flow of oil to happen. When the bale is dumped and the gate is closed, the large spring retracts the density cylinders and oil is allowed to free-flow from the base end to the rod end of the cylinders as the bale chamber shrinks to start position. The system is a closed-loop deal with zero static pressure when the baler is empty and up to 1500-2000 psi at the rod end ports with a full bale. The hoses leaving the valve at (3) go to the density cylinder on the opposite side of the baler. The hose at the top of fitting (#5) goes to a gauge that is visible to the operator and a test fitting where the system is purged & charged. A manually adjustable relief that restricts oil leaving the rod end as the bale forms. I was wondering if anyone could tell me who in the central Tennessee area works on New Holland rollers or how I might determine which piston needs rebuilt.Įssentially the density control valve. I had to raise the baler back end to get the one side connected back in the extended postion. I was able to take a rachet come-a-long and decompress one side but the other side I couldn't budge. Well neither would go back in once I extended them out. I took #2 (see attached picture) off on each side and exteneded them out with the hydraulic lever on the tractor thinking maybe I could tell which one acted differently. There are no hydraulic leaks anywhere on the baler. I can't seem to figure out how to determine which piston needs repaired. I posted about this last year but never got the thing fixed. Well we figured out if you let some of the pressure off the hydraulics then they would go down, however now we get loose rolls. After dumping a roll the roller belts won't tighten back up. I have a New Holland 678 baler that I have been having troubles with.
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