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  1. D

    Case 680K Sudden loss of all Hydraulics

    UPDATE: It appears you're all correct it appears to be temperature related. As mentioned it hadn't been above mid 20's for weeks. Then as all of you in the Continental US know we had that "Artic Blast" or whatever they called it come though. It was -10 to -16 here for almost a week, high winds...
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    Case 680K Sudden loss of all Hydraulics

    Well unfortunately being the middle of winter here in western PA I don't think I'll have the opportunity to do any temperature dependent testing or flushes in the near future. Forecast shows teens and 20s for as far as the weather man can see. so if that's the next most agreed upon course of...
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    Case 680K Sudden loss of all Hydraulics

    Harley, I thought of that as well. It hasn’t been over 20 degrees since Christmas to test that theory though. HOWEVER, the fact that it’s flowing at all tells me that wouldn’t be the case. Also the primary hydraulic filter is now brand new, so it would have to be the screens in the tank that...
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    Case 680K Sudden loss of all Hydraulics

    Darn it, it threw the last photo first, sorry about that. Also hydraulic schematic for reference
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    Case 680K Sudden loss of all Hydraulics

    ok here are some photos. The first darker pump is the pump for the loader that runs off the flywheel I believe. It’s under the footpedals behind the engine. The second pump is the one on the front of the motor that drives the power steering and backhoe. This photo is of the loader valve, it’s...
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    Case 680K Sudden loss of all Hydraulics

    I’ll take pics tomorrow night when I’m at the machine. Clueless thanks for the info. I’ll put those on the parts list to replace/clean
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    Case 680K Sudden loss of all Hydraulics

    Vetech, one pump is on the front of the engine the other is on the back off the flywheel. Clueless, I did not check those screens inside the tank, not sure if I can physically get to them. But being that I get a good flow out of the main filter I’m making the correlation that at least one of...
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    Case 680K Sudden loss of all Hydraulics

    ok thanks. Here are what I believe are the diagrams for the front and rear pump mounts. not so sure about the rear one that's off the flywheel but this diagram does show a part labeled "sleeve" in the vicinity of where it mounts. I assume 38 is the part in the front diagram? is this just a...
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    Case 680K Sudden loss of all Hydraulics

    one of these parts? I'd post both pumps but their diagrams are nearly identical even though they mount to different locations.
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    Case 680K Sudden loss of all Hydraulics

    Ok forgive my ignorance but are we talking about the splines inside the pump? Or the ones on the shaft that connects with the engine? Something that requires new pumps or pump rebuilds? I guess I should look at my parts diagrams for pump sleeve. Ha ha
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    Case 680K Sudden loss of all Hydraulics

    Hey there everyone. Long time reader First time poster. I've recently ran into an issue that has me stumped. I've got a mid 80s Case 680K construction King. Bought it about a year ago and it's been a good worker. I've been slowly updating things here and there to make her a nice machine. On...
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