Dumped my hydraulic fluid, am I damaging my pump?

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nelstomlinson
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Dumped my hydraulic fluid, am I damaging my pump?

Post by nelstomlinson » Mon Jun 29, 2020 8:02 pm

I just tore or blew out the hydraulic return hose under the belly of my 450C, and dumped all the hydraulic oil in the garden. I need to get the machine out of the weeds and back onto solid ground. I think that I can back drag out of there with the bucket down. Am I going to mess up my hydraulic pump running with no hydraulic oil for ten minutes or so?

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gregjo1948
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Re: Dumped my hydraulic fluid, am I damaging my pump?

Post by gregjo1948 » Tue Jun 30, 2020 3:14 am

Running a hydraulic pump dry can damage it. I'm not sure if there is a separate reservoir for the power steering or if that will be affected also. I'd try to remove the pump or at least disconnect the pump drive. I'm not sure about a 450C but my 350B has a lever at the front of the crankshaft that is used to disconnect the pump drive.
JD 350B diesel 6way blade, Case 580B Loader/backhoe, Farmall 504 high crop w/ flail boom mower, International 404 , International 284 diesel w/belly mower, 1972 Ford F600 dump truck, Galion 3-5 roller, Allis Chalmers D17

Jim B
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Re: Dumped my hydraulic fluid, am I damaging my pump?

Post by Jim B » Tue Jun 30, 2020 3:49 am

They stopped using the lever disconnects during the 350B production range I believe. As far as I know there never was such available for a 450C, so you have to get to the shaft to disable it. https://partscatalog.deere.com/jdrc/sid ... gId/223838

Can you see the damaged hose? Can you reach it to wrap it with something to slow the loss? You can/will ruin the pump by running it without oil for 10 minutes. A leak that was losing oil would be one thing but if it dumped all the oil that quick, it doesn't sound like you could fill it with even cheap oil and move quick enough to get it out of there. But if you have to move it that may be the only option to try. Hopefully someone has another.

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77 Ford
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Re: Dumped my hydraulic fluid, am I damaging my pump?

Post by 77 Ford » Tue Jun 30, 2020 6:45 am

I would not move it without disengaging that pump up front, those gears have very tight tolerance and no lubrication would kill them fairly fast. Just my opinion.
JD- 450C track loader
Serial #208336T

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DrLoch
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Re: Dumped my hydraulic fluid, am I damaging my pump?

Post by DrLoch » Tue Jun 30, 2020 6:52 am

Jim has provided the best answer. If it's a loader, my guess is that it's the pressure line since the only lines running tot the front through the belly pan are the pressure and suction lines for the pump.

If you wrap the line as suggested, don't move the bucket handle. You may be able to get it out, watch the reservoir level, when it goes low/empty don't run it any longer than about 10 seconds (my suggestion).

Fun fact/Information. Some of the trash trucks run what is called a dry valve pumping system where they close off the inlet of the pump and only allow about 1/2 GPM to flow through the pump for lubrication. When the operator moves a handle the dry valve opens and allows full inlet flow.

http://www.phtruck.com/download/Trainin ... d-Pump.pdf

Check it out.
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nelstomlinson
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Re: Dumped my hydraulic fluid, am I damaging my pump?

Post by nelstomlinson » Tue Jun 30, 2020 9:03 am

Sounds as if I better look for a new pump, or look for a way to disconnect this one. The backhoe outriggers can't lift the back of the machine, so I think the pump is weak. Maybe the new pump idea isn't crazy.

The machine is sitting above a little ridge of dirt and crud, high enough underneath that I can't get under it. I suspect that the bit of radiator hose that joins the two pieces of the steel return line got nudged by a little stump, or the ridge of dirt, and let go. The oil all dumped out in a big hurry, whatever it was that opened up!

Thanks for the info, everyone.

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77 Ford
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Re: Dumped my hydraulic fluid, am I damaging my pump?

Post by 77 Ford » Tue Jun 30, 2020 10:25 am

If you know anyone with a Chinook they have an approximate lifting capacity of 10 tons, they could set it at your shop for you.
JD- 450C track loader
Serial #208336T

nelstomlinson
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Re: Dumped my hydraulic fluid, am I damaging my pump?

Post by nelstomlinson » Tue Jun 30, 2020 6:23 pm

The Chinooks are based 100 miles away. I'll put out some feelers, but that idea probably won't fly.

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gregjo1948
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Re: Dumped my hydraulic fluid, am I damaging my pump?

Post by gregjo1948 » Wed Jul 01, 2020 4:08 am

Do you or a neighbor have a large enough tractor to pull/push the loader home? If so, one with a front bucket would be good to lift and block the hoe, outriggers, and front bucket. I could probably pull it with my old Dodge Ram but I doubt that Ford or Chevy could do it. :lol:
JD 350B diesel 6way blade, Case 580B Loader/backhoe, Farmall 504 high crop w/ flail boom mower, International 404 , International 284 diesel w/belly mower, 1972 Ford F600 dump truck, Galion 3-5 roller, Allis Chalmers D17

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77 Ford
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Re: Dumped my hydraulic fluid, am I damaging my pump?

Post by 77 Ford » Wed Jul 01, 2020 6:46 am

I already have a off topic thread cooking taking those early model crawler guys to task or I'd tell you all about how much better my Ford is than those other unnamed brands....o wait I guess I did :lol:
JD- 450C track loader
Serial #208336T

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