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Tractor Talk Discussion Forum

hydraulic spool valve o rings inside

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rod

08-28-2003 18:54:19




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Hi all I have just got a MF 203 with MF 220 backhoe on it I wanted to replace the o rings inside the control valves on the backhoe so far I have them off and apart except for the spool valve itself it has two roll pins that I took out and then it looks like the pressure relief part has to unscrew out to get at the o rings inside it but if I do this will it affect relief pressure setting? I would really like to talk to anyone that has rebuilt one of these there are six valves in all mounted all together with three orings between each valve and two orings on each spool outside not sure how many are inside it.
regards
rod

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Kennyp

08-28-2003 19:39:56




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 Re: hydraulic spool valve o rings inside in reply to rod, 08-28-2003 18:54:19  
Yes, if you change the depth of the pressure plug, you will change the pressure. Some times it is kind of bottomed out so it would go back the same place Not too hard to adjust when you get done. Its been a while since I had one apart so my memory is hazy. If I remember right the hard part was inserting the spool with the O rings on it without scratching them. I think, I placed the ones on one end, them pushed the spool though and put the ones on the other end and pulled it back. To keep from having the O rings in the middle passage which has sharp edges. Go slow and think, and you should have no problems. Kenny

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rod

08-29-2003 17:21:00




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 Re: Re: hydraulic spool valve o rings inside in reply to Kennyp, 08-28-2003 19:39:56  
spent all afternoon putting in orings and got it all back on hoe only to have bolt which holds all six valves togehter break and nut flew right off it and oil everywhere finally called it a day I will try to find some threaded rod see if that will hold them together hopefully I don't have to take it all apart again.
regards
rod



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Kennyp

08-30-2003 09:42:11




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 Re: Re: Re: hydraulic spool valve o rings inside in reply to rod, 08-29-2003 17:21:00  
Oh boy! we all have days like that. Just put it aside and come back another day. I have low respect for threaded "ready" rod. Quite brittle. Can you find a store that stocks the size you need? Ace hardware?



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