This noise is NOT heard when the unit is not having an overflow). Basically, removing the filler cap allows the tank to de-pressurize (the filler cap makes a popping noise when it comes off, a lot like opening a bottle of champagne. If I remove the hydraulic filler cap during one of these sessions, the overflow immediately stops. When it happens, it will go for 15 – 20 seconds before stopping about a ½ to a full quart of fluid is lost each time. I can tell you that when the fluid starts coming out, it does so as a result of pressurization of the reservoir tank. The only vent that I am aware of is this one that is overflowing. They don’t show anything hydraulics-plumbing related (other than the metal high-pressure supply lines) that I have not replaced. I have the ops, service, and parts manuals. I replaced this filter as part of the major parts replacement project that I referenced in my initial post. The only hydraulic filter my manuals show is inside the reservoir tank. The o-rings were replaced from IH-dealer provided rings specified for this machine (same hardness rating). I have replaced the rubber return line along with all of the rubber pressure supply lines and the various o-rings at the connections. There are several supply and one return line to/from the reservoir. Some additional information: The fluid is overflowing from the reservoir tank. I also verified that the breather is not obstructed in any way.ĭoes anyone have any other ideas as to what could be wrong? I also changed the hydraulic return lines that run back to the tank and changed out the hydraulic fluid filter that is mounted in the tank. In response to this issue, I have been through the entire machine and replaced all of the orings and hoses throughout (had numerous leaks in other areas before). The fluid itself is not milky in the reservoir. This resulted in a noticable loss of loader lift. Thinking that perhaps it was not the correct dipstick, I allowed the fluid level to drop (by not refilling the reservoir when it would dump fluid out of the breather) so that the reservoir leak would not happen so frequently. The full line on the dipstick results in the fluid level being very close to the top of the reservoir. Since I have had it, it has pushed hydraulic fluid out of the top-mounted hydraulic reservoir breather when I lower the bucket anything other than very, very slowly. I have 70's IH3200B skid steer with a Wisconsin Gas 4 cylinder engine (VF4D, if I remember right).
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