Posted by Owen Aaland on December 23, 2007 at 16:11:22 from (65.161.86.40):
In Reply to: MCV on 706 posted by Croz on December 23, 2007 at 12:14:17:
If the pump is good and you are not finding any blown o-rings, either the 3 GPM orifice has a problem or the flow divider valve is stuck. Most likely the valve is stuck. I don"t remember if the orifice coming out will cause all the oil to go to the oil cooler or to the steering. I"m at home and my manuals are at the shop. I think it goes to the steering.
The flow divider valve is located below the TA dump valve. the orifice is in the port with the 5/8 head plug below the flow divider. If the valve is stuck you will need to remove the inner and outer plates to pry out the valve..
IH manuals say that you must replace the MCV if the flow divider is scored, no service parts available. It appears to me that excess leakage between the spool and will only cause the spool to travel a smaller distance to compensate for leakage. I have polished many spools and housings to free them up and have never had a problem with any of them. If the tractor was in warranty I replaced the MCV otherwise I just repaired them.
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