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Tractor Talk Discussion Forum

Backhoe Hydraulic Cooler Removal

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AndrewS

10-12-2004 06:56:51




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I need some help trying to remove the hydraulic cooler on my backhoe. I can't get the hydraulic lines off the cooler and don't want to break anything. There seems to be two nuts on each hydraulic line where it enters the cooler. The one closer to the cooler is a narrow nut where the one farther away is much wider. Both use a 1 1/4" wrench. Should I try to hold the narrow nut while turning the wider nut or should both nuts turn at the same time? I tried turning the wider nut while holding the narrow one and it would not budge. I tried turning the wider nut but the narrow nut turned with it and it looked like the hydraulic pipe was going to bend so I stopped.

At this point I could really use some advice. The machine is a Dynahoe 160 and the hydraulic cooler weeps quite a bit of hydraulic fluid.

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AndrewS

10-14-2004 06:04:08




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 Re: Backhoe Hydraulic Cooler Removal in reply to AndrewS, 10-12-2004 06:56:51  
Thanks to everyone who answered. I've got all the nuts to the hydraulic cooler loosened. Didn't take it off yet as I have to get some buckets under it to catch the fluid but the hard part is done! Hopefully when I take it to a radiator shop they will be able to repair the leak.

Thanks again.



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NC Wayne

10-12-2004 20:42:24




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 Re: Backhoe Hydraulic Cooler Removal in reply to AndrewS, 10-12-2004 06:56:51  
Like one post said typically the thin nut is actually soldered to the cooler and is used to prevent twisting off the cooler leg while the wider one should swivel around the line. One secret I've found over the years that works great on hydraulic fittings is this. Now depending on how stiff the cooler legs are you might have to use something as a back up device, but take a hammer or a hammer and punch and give the swivel nut several good hard whacks on a couple of the flats. I've seen #32 fittings that wouldn't budge with a wrench and a cheater pipe break loose with the wrench alone after a couple of good solid hits. Like the old saying goes when all else fails get a bigger hammer...in this case though it actually works. Good luck.

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Lil-Farmer

10-12-2004 09:42:27




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 Re: Backhoe Hydraulic Cooler Removal in reply to AndrewS, 10-12-2004 06:56:51  
The narrow nut (male side of connection) is more than likely silver soldered to the steel line and will not swivel on the line. The big nut (female side of connection) is probably meant to swivel on the supply line coming to the cooler. These can get extremely tight over a period of time. You might want to apply some heat to the large nut (I E small propane bottle torch or similar); too much heat can melt the silver solder in the male connector.

Good luck, they can be a real bear sometimes.

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JHesler

10-12-2004 07:38:22




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 Re: Backhoe Hydraulic Cooler Removal in reply to AndrewS, 10-12-2004 06:56:51  
Best thing I've found is 12 pt flare nut crows foot wrenches for this job. If the area is tight, nothing else will get in there. Even a good flare wrench will sometimes open up enough to skip the faces. A screw type hose clamp has kept this from happening on the work I've done.



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lucas boy

10-12-2004 07:46:22




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 Re: Backhoe Hydraulic Cooler Removal in reply to JHesler, 10-12-2004 07:38:22  
i think the thin nut should be loosened first . lucas



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