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Farmall & IHC Tractors Discussion Forum
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Connecting Hydraulics lines

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Jeff Jackson

01-28-2006 06:57:21




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I'm in the process of hooking up a spool valve on my 53 Super M for 2 way hydraulics. I've probably beaten this subject to death in earlier posts but I have 1 more question. Would it be better to "T" the suction line from the spool valve into the existing suction line or run it directly into the fill port on the belly pump reservoir? The filler cap on my reservoir has a vent hole in it....would it cause any problems if this vent hole is eliminated? Thanks for everyones advice!!!

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Randy-IA

01-28-2006 12:04:58




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 Re: Connecting Hydraulics lines in reply to Jeff Jackson, 01-28-2006 06:57:21  
OK , I am no hydrualics expert but that question didn't make any sense to me . Why would you plumb a suction line to the fill port anyway ? Did you mean the return line ? Or am I missing something here ? On the other question about the vent hole I might have an answer to that . If you don't vent the system the system will vent itself when it gets enough pressure built up from heat expansion , most probably a gasket will let loose .

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P Backus

01-28-2006 12:00:46




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 Re: Connecting Hydraulics lines in reply to Jeff Jackson, 01-28-2006 06:57:21  
I don"t think I would T the return line from the spool back into the suction line. If nothing else, it allows the oil to return to the resevoir and cool down a bit, rather than being in a tight loop potentially cycling from the pump to valve to pump to valve..... ..
Maybe a hyd expert would say it doesn"t matter, but I wouldn"t do it that way. With two way hyds, the oil is ALWAYS circulating. Yes, there needs to be a vent in the resevoir since the level of fluid will fluctuate a bit as you use the hydraulics, even on a two way system, but especially on a one-way cylinder. Even if it didn"t, as the fluid heats up it will expand. Paul

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