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Hydralic Update

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Brian Jensen

10-04-2007 20:57:58




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I managed to free up the pump, Thanks Jim for your suggestion, went to the auto parts store/home center and bought a Tire Valve and a Bathroom sink plug, drilled a hole in the plug pulled the tire valve through hooked it up to a 12 Volt Air Compressor for inflating tires and voila, custom made Hydraulic assistance tool, I will have to take some pics of it for future reference, great little tool Jim. So the pump is free I managed to get the bucket curl, the grapple and the lift working a few times this evening but it seems to keep getting airlocked, maybe it is not a one person job, but at least I know that my pump is not destined for the scrap heap. So I am sure tomorrow I will have it wokring full time. In case anyone is wondering what the headache I am working with looks like you can view El Toro's post here with a pic of my nightmare!!!

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Janicholson

10-05-2007 06:22:58




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 Re: Hydralic Update in reply to Brian Jensen, 10-04-2007 20:57:58  
Very good. The nightmare of plumbing may take a bit of work to get the air all worked out. A rig like that with what looks like substantial contained volume, may need a secondary resivoir to allow for enough expansion when warm. Keep checking the fluid level to avoid getting air in it. The intake screen may need cleaning (see parts diagram) Again congrats. JimN



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Brian Jensen

10-04-2007 20:59:09




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 Re: Hydralic Update in reply to Brian Jensen, 10-04-2007 20:57:58  
Sorry here it is, too many diesel fumes today maybe!!!!



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El Toro

10-05-2007 04:03:27




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 Re: Hydraulic Update in reply to Brian Jensen, 10-04-2007 20:59:09  
third party image

Hi Brian, Your link doesn't work. Hal



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Brian Jensen

10-05-2007 10:50:28




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 Re: Hydraulic Update in reply to El Toro, 10-05-2007 04:03:27  
OK I disconnected everything except for the grapple, managed to get that working faithfully, so I disconnected it and hooked up the bucket curl, and got that working faithfully, I disconnected it and am now working on getting the boom to work, that is the biggest system though and there has been lots of air coming out, had an oil leak spring up out of the oil pressure line at the engine block so will fix that and then carry on with the hydraulics. Are these oil pressure fittings pretty easy to come by? Standard size? Readily available at a parts store?

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El Toro

10-05-2007 11:13:24




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 Re: Hydraulic Update in reply to Brian Jensen, 10-05-2007 10:50:28  
Are they compression tube fittings? Most auto part stores should have them and Home Depot too.
Hal



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Brian Jensen

10-05-2007 11:28:39




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 Re: Hydraulic Update in reply to El Toro, 10-05-2007 11:13:24  
Yes they are, I bought a new oil pressure guage from Wal Mart because the one I had didn't work, but the replacement line it came with it had 3 different fittings but the only way I could get them to fit was backwards but that made it so I did not a fitting to hook onto the line. so I put it together and capped it with a bolt, but it seems to be leaking right at the block. Maybe it is just loose but if I am fixing it, then I may as well fix the whole run.

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El Toro

10-05-2007 11:56:45




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 Re: Hydraulic Update in reply to Brian Jensen, 10-05-2007 11:28:39  
I think most of those tractors used 1/4" copper tubing. I would rather use flared fittings and double flare the tubing. We used 1/4" low pressure hose with barbed swivel nuts. We used
high pressure hose on fuel pressure and hydraulic
pressure. We still used the flared fittings. Hal



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Janicholson

10-05-2007 14:42:23




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 Re: Hydraulic Update in reply to El Toro, 10-05-2007 11:56:45  
Hal, Copper tubing is not supposed to be used for hydraulics. It often is, but it is not safe to do so. most low pressure systems (under 1500PSI) use 1/2" ID hose fittings and flares. All tubes are steel, or alloy, and hose needs to be rated at 2500PSI to be within expected peak pressures. Copper tubes work harden and crack regularly. Just being safe, JimN



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El Toro

10-05-2007 15:45:10




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 Re: Hydraulic Update in reply to Janicholson, 10-05-2007 14:42:23  
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We were conducting engineering tests on military vehicles such as drawbar pull, cooling tests and resistance to tow with this vehicle. We even ran fuel consumption tests at road load speeds and during drawbar pull tests. All temperatures on the test vehicle were monitored back in the Mobile Dynamometer. Hal

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Brian Jensen

10-05-2007 15:04:05




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 Re: Hydraulic Update in reply to Janicholson, 10-05-2007 14:42:23  
Hey guys this is actually for engine oil, a hydraulic pressure guage is something I would like to add in the future but will likely have to have something fabbed to do so, all a part of my new hydraulic plan.



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El Toro

10-05-2007 15:34:53




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 Re: Hydraulic Update in reply to Brian Jensen, 10-05-2007 15:04:05  
That's for his oil pressure that's probably less than 50psi. WE used steel braided hose for measuring hydraulic pressures on test vehicles. We never used copper tubing very much except when we ran the test pressures to a manifold on top of the power pack. Then we would run low pressure hose that was rated at 250psi working pressure to a gauge panel. We made our own high pressure hose as we needed it. Hal

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