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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

ford 4000, 723 backhoe

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spud in mo

02-20-2005 21:45:19




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Fellas,
I have a badly leaking steel line that runs internaly up the boom to the crowd cylinder,( I think its called the crowd ) and need to know what is the best way to fix this. I see alot of options, like run a line external, and hose all the way, ect. Can one of these lines be made or bought? What is the best option?
spud in mo




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jdemaris

02-21-2005 08:05:32




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 Re: ford 4000, 723 backhoe in reply to spud in mo, 02-20-2005 21:45:19  
The new pipes are easy to make. I use black iron pipe and thread it, I buy it at my local plumbing supply store. One note about some of the 723 hoes. I have a 1963 4000 Industrial with the 723 hoe and 724 loader. The hydraulic hoses on the 723 hoe have ends that are very hard to find. I recently found a place that sells adapters for the 723 hoe so conventional hydraulic hoses with pipe threads can be used. Works very nicely.

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Roy Suomi

02-20-2005 23:26:08




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 Re: ford 4000, 723 backhoe in reply to spud in mo, 02-20-2005 21:45:19  
If you jack up the machine with the stabilizers, you can remove the steel tubes for inspection. There is a large nut on top of boom, this holds the upper end of tube in place [ where the hose attaches] Then there is a clamp on lower end of tube, unhook that.slide the tubes out of boom so they go under back of machine til clear.Always , Always block up machine with wood blocks so it doesn't settle or fall on you..Safety first.. I have brazed them up with high tensil strenght brazing rod

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spud in mo

02-21-2005 20:48:08




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 Re: ford 4000, 723 backhoe in reply to Roy Suomi, 02-20-2005 23:26:08  
Thanks fellas, that blck pipe idea will work just fine. I have found a Carquest in our area that handles those adaptors, and I can thread the pipe at work.
Thanks to all,
Spud in mo



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Billy NY

02-23-2005 07:28:12




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 Re: ford 4000, 723 backhoe in reply to spud in mo, 02-21-2005 20:48:08  
Whoa, Spud, be very careful in the material you select, the pressures you are dealing with may very well exceed the pipe pressure capacity you plan to use, just a friendly warning, see if you can find pipe specific to that application and or pressure if you know what it is, sounds like a hard place to work in, you probably don't want to do it twice, speak to someone at a hydrualic shop or similar, I'm not sure what the working pressures of black iron is, but if it's gas line or similar, you may want to check it out before you fabricate what you need, make sure the fittings are of the same type and grade, elbows and or 90's, and don't replace hoses at the ends with pipe, I beleive the hoses stand up to shock and vibration, rigid pipe will fail. Anyways sorry for butting in etc., thought you may want to at least check it out, have seen mistakes like this before.

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jdemaris

02-24-2005 06:25:00




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 Re: ford 4000, 723 backhoe in reply to Billy NY, 02-23-2005 07:28:12  
I've been using "black iron" pipe to replace hydraulic pipes for 40 years and I've yet to see one burst from pressure overload. I buy it in 22' lengths from my local plumbing supply. Black pipe is made of wrought steel, I buy 3/8" i.d. and 1/2" i.d. in schedule 80 wall thickness which has a burst rating of 4400 PSI. The conversion fittings I use on Ford 723 hoes have a burst rating of 5000 PSI. As far as the use of threaded iron pipe fittings on high-pressure hydraulics - I don't know what they're rated, but I've seen lots of high pressure systems that have them, and again - never seen one fail from pressure overload.

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Billy NY

02-24-2005 08:10:58




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 Re: ford 4000, 723 backhoe in reply to jdemaris, 02-24-2005 06:25:00  
Sounds like that'll work fine, I kinda butted in here, as I saw someone use what seemed to be the wrong material on a hydrualic system some time ago,it failed, and it had to be re-done with higher strength material, always good to know what the numbers are on a pressurized system, so you know what to use, perhaps with a margain of safety included. I can't recall what they used, but it sure made a mess, could have been defective pipe, have seen that too.

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spud in mo

02-25-2005 04:37:49




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 Re: ford 4000, 723 backhoe in reply to Billy NY, 02-24-2005 08:10:58  
Fellas, This is an old hoe. the replacment of this pipe is no big deal. Ive got showered with alot worse than oil before. The PSI rating of shed. 40 is 2300 for 1/2 pipe. Hey, if it pops Ill use shed. 80. This hoe is for use on my hobbie farm... If I was making money with it, I would buy a newer hoe.LOL
spud in mo



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