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No mcv pressure


rfh129
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I installed a ta in my 706. First time. I rebuilt mcv, but didnt put a new pump on, was going to check the pressures. I dont believe the pump is that old. Well it will not pick up the oil. 3 pt and pto work. I pulled the flow divider plug and the flow control plug nothing. If I put my finger over the flow control port it sucks my finger. 

Any ideas before I put a new pump in?

Thanks

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Pull the plug on the bottom right and pull the steering relief out.  Put a bucket under it and start it.  Let it puke some oil, then put it all back.  Should go after that. 

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35 minutes ago, rfh129 said:

Why is the pressure so high?

Several possibilities.  Read the papers that came with the AG Parts T/A.  They give lots of info and a problem/solution guide.  Reading a service manual would be a good thing to do as well. 

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Make sure you get the oil up to operating temp. Then check pressures. They will come down some.

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Yes the psi is to high , 275 to 300 for the new TA is good . Check your regulated psi valve when you pull the cap where the springs are and make sure no one has put shim washers inside the spool .I’m thinking you should pull the MCV back off and remove the hyd pump and put it in the parts washer or fill the pump with diesel fuel in the big port /suction side , put your thumb over the small port and turn the pump over by hand , if it blows your thumb off the psi port the pump is good , if it won’t the pump is bad . This is a very simple test and was shown this by the guys when I worked at IH .  
And just so you know you don’t pull the the steering relief to get the air out to make it pump oil . There is a plug just below the oil psi sending unit that takes a 5/8 wrench, remove that , start it up and soon as the oil comes out shut it down and install the plug , this is how you get the air out so it will operate . Send me a pm if you can’t figure it out .

‘Danny 

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If you used an Ag parts spring kit, it will be too high. The spring they send is always too long. You will have to trim the spring or use your old one. 

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54 minutes ago, Brian stortenbecker said:

If you used an Ag parts spring kit, it will be too high. The spring they send is always too long. You will have to trim the spring or use your old one. 

This!  Must be even higher now, last one i did was 325 lbs the way it was.  

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Our Ag Parts rep said to check your psi before replacing the TA and see if your psi is good , if so leave the old springs in there and just do the gaskets and polish all the spools and valves .

‘Danny

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At 375 PSI, I think the pump is just fine.

No reason to pull the 5/8" plug and spray oil on the axle.  Pulling the lower plug and relief accomplishes the same thing and you can catch the oil in a bucket.  I guess I do it the cleaner way.  Private messages not necessary for such a simple procedure.   He seems to have figured it out just fine. Besides, OP already did it anyway and it worked as described.  

Testing pressures before T/A replacement is pretty important, but in this thread not relative as the new T/A is already installed. 

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J Mech , you just don’t get it do you , another simple question and you always have to turn everything into your the only guy that knows how to fix IH tractors ? after a few days ago with you calling people out about how smart you are it very clear who you really !! Ever cross your mind that there are some people on here trying to help people with out your smart a$$ response !! Hey , maybe you can hook a hose on where you remove that plug and run it in a pail ? 
‘Danny 

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1 hour ago, DirtBoyz07 said:

J Mech , you just don’t get it do you , another simple question and you always have to turn everything into your the only guy that knows how to fix IH tractors ? after a few days ago with you calling people out about how smart you are it very clear who you really !! Ever cross your mind that there are some people on here trying to help people with out your smart a$$ response !! Hey , maybe you can hook a hose on where you remove that plug and run it in a pail ? 
‘Danny 

I typed out a response, but decided it isn't worth it.  I'm not going to add to the drama you're causing.

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