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230 hydraulic problems

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dozinhal

03-12-2008 17:43:05




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I have a 230 w/fasthitch and a two bottom plow. We took the matchbox size block out of the plow and put it on top so the plows will now go in the ground. My mechanic moved the left hydraulic lever and watched me plow one round. After he left the tractor backfired through the carburetor and then I thought I busted a radiator hose. Then I realized it was hydraulic oil instead of water. The pressure knocked the clamp off the hydraulic hoses and the oil started leaking from somewhere up front. What is wrong and why is it building up pressure? The system makes cavitation noises and the cylinder now goes all the way down until you can't see any of the ram.

Thanks. Hal

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mkirsch

03-13-2008 04:52:07




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 Re: 230 hydraulic problems in reply to dozinhal, 03-12-2008 17:43:05  
You mentioned a clamp. A hose clamp?

Hose clamps are meant for low pressure installations, like radiators and garden hoses. The pressure there is maybe 60PSI.

Hydraulic pressure can be as high as 1200PSI. Way too much pressure for a hose shoved over a cut off pipe and clamped on with a mere hose clamp.

Hydraulic hose ends are CRIMPED on with large collars.



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Hugh MacKay

03-13-2008 04:20:26




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 Re: 230 hydraulic problems in reply to dozinhal, 03-12-2008 17:43:05  
Hal: It would help if you told us which hose blew. Pressure is what hydraulic systems are all about, without it they won't lift anything. Where is this 2" match box size block? You say out of the plow, but where on the plow?

The cavitation noises make me suspect you have low hydraulic oil, dirty screen or filter, maybe some improper plumbing. When was the last time you checked the filter or changed the hydraulic oil? Do you know if any modifications have been made to the hydraulic system, I'm thinking the control valve that controls the hitch when I talk modifications.

Do you have a manual showing how to adjust depth control on that plow? I ask that as I've seen some quite unusual ways of trying to achive depth control, most of them don't work.

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dozinhal

03-20-2008 18:21:58




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 Re: 230 hydraulic problems in reply to Hugh MacKay, 03-13-2008 04:20:26  
The clamp was a metal clamp on the two hydraulic lines that go from the pump to the control valve.I have not found the hole yet. The block we moved on the plow was just apiece of metal. If I have built up pressure, where is the stuck valve?



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Hugh MacKay

03-20-2008 19:06:16




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 Re: 230 hydraulic problems in reply to dozinhal, 03-20-2008 18:21:58  
Hal: You can't expect clamped hoses to withstand the high pressures of a hydraulic system. When new the lines from pump to controls on a 230 would have been heavy wall steel pipe. Hose is not even recommended. You need replacement steel lines.



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