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Ford 9N, 2N & 8N Discussion Forum

Hydraulic hose Q's

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01-23-2004 17:40:17

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I have a 48 8n that has a dearborn loader on it that I am in the midst of repairing. I need to replace the hydraulic hoses and am unsure about which ones to use. The connection points are all 1/2" pipe thread, and had a variety of adapters on them, as well as some scary low pressure fittings on the high pressure side. I have found readily available hoses but there are some options that I don't know which ones to pick. Should I get one wire or two wire hoses? Should I get hoses with pipe thread ends or flare thread ends? If I get pipe thread ends what adaptor should I get to act as the union. If I get flared thread ends it seems as if there are several types of flares, which ones of those? Thanks, Andy

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01-23-2004 18:27:54

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 Re: Hydraulic hose Q's in reply to Andy, 01-23-2004 17:40:17  

You need to match the hose pressure rating to the application. Single wire hose should be fine. Two wire is more common, and more money. Single wire is more flexible. If you can get the Gates Megaflex that is very nice stuff. Most applications use NPT fittings - pipe thread. With the pipe threads you will need to use pipe sealant (aka Pipe dope) Don't use teflon tape, unless you like leaks. Loctite PST is the best. Most accessories have pipe thread, i.e. gauges, valves, cylinders... Another option is the JIC fittings. This does not require pipe dope. It is also less common in agriculture applications. You can not mix and match fittings, so you should see what you have and match accordingly.


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01-23-2004 17:48:02

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 Re: Hydraulic hose Q's in reply to Andy, 01-23-2004 17:40:17  
Probably the most reasonable solution, and just as good as any for this application, is to use 1/2' mpt fittings at both ends of your hoses, and then use 1/2' hydraulic swivel adapters at one end. This would allow you to use ready-made, off-the-shelf hoses.

Another alternative would be to use a 1/2" mpt fitting on one end, and a 1/2" swivel fitting on the other end.

If you decide to go to flare, there are 45 degree and 37.5 degree fittings, and I far as I know, you could use either one for this application, as long as fittings that mate together are all the same degrees.

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