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Message: <blockquote data-quote="Daewoo" data-source="post: 31996" data-attributes="member: 3482"><p>First off, great forum you have going here! There seems to be a shortage of new holland info out there. I was glad to find it! I have a C190 with about 700 hard hours on it (we use it in a quarry and skid steers get beat to death out there). The other day it blew a bunch of hydraulic fluid out the bottom. Refilled it so we could get the arms up and locked. When they started it after the refill the fluid started running out immediately (sitting still and without moving the arms) and it was extremely aerated (to the point it looked white). We got the arms up and locked and pressure washed the floor pan so we could see what was down there. The guys found that a return line had pulled off the back of the reservoir. Re-attached the line, put the thing back together, refilled the system. When we restarted it, the drive on it was barely functional. It would go extremely slowly and with no power. I assumed there was some air still in the system and told them to drive it around a little bit and see if it improved. Instead it got worse and now it is at the point that it will only go forward/back maybe 2 ft, extremely slow, then stalls out. If you keep pushing the levers forward after it has stalled the low pressure light come on within about 5 seconds, but when you let off the handles the light goes right back out. I want to attach a couple of disclaimers here. First, I am not convinced that the return line pulled off the back of the tank was the problem to begin with and wonder if maybe the guys inadvertently pulled it when they were working on it. If the return line was off to begin with, when we poured fluid in to get the arms up it seems likely that it would have all just run right out the big 1" hole at the back of the tank, so would have started leaking BEFORE we started it back up. Second, it seemed EXTREMELY clear to me that the leak was coming from somewhere under the engine, not from under the battery. If not for the fact that the suction lines are visible, seem to be fine, and dont appear to have filters/strainers in line, I would almost bet it was a suction problem (blockage). As is I am a little stuck. The only thing I can really think of is that maybe it is a return side problem...a problem at the manifold or a pinched primary return line somewhere??? I am shooting in the dark here. Could a return side problem on the drives cause cavitation in teh pump and thus aeration of the oil? Also, in one of the parts diagrams on the new holland site it shows a "resonator" but it does not look like any hydraulic resonator I have ever seen (it looks like a manifold with a sensor or actuator sitting on top of it from the admittedly unclear drawing). Thanks in advance for any help!</p></blockquote><p></p>

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