MF 300 Hydraulic Problems

[Anonymous-0]

I took the metering pin out of the table height control and there was a missing O ring. This is hopefully my problem. My next concern is were did it go?

 

[gbs]

may not be of any help,but go to agco's web site look under parts book guest user ,look up your machine it has a large parts break down with decent drawings,as there are several different valve and pump configurations used on that machine,sounds like your on the right track as the header height could possibly be dumping your fluid back to the return ,but it should still steer because the pump has a priority valve in it to furnish the steering fluid,did notice a drawing of a proportioning valve for one model don't know if it's being used for steering on that version or not, either one could have a broken spring letting fluid return to the tank,didn't see any drawing of the header height control may have to look it up under the header model,even though you have changed the pump you could still have a problem with it,might save you a lot of head ache if you could get access to a flow meter and check the gpm and pressure coming of the pump before the valve system to insure that the pump is up to par,i am suppose to have a manual on a 300 that shows a header height valve diagram if that will help let me know and i'll try and locate it and post it,good luck and hope i haven't confused you.

 

[IaGary]

I didn't see this post before I posted below. Check my post there.

Gary

 

[Anonymous-0]

Yes she steers great. It did have some hard spots before the new pump. I have a parts manual, but it does not show much on the THC valve. There is an O ring missing on the metering pin. I will pick one up tomorrow. Will the old O ring become lodged in the system somewhere?

 

[Anonymous-0]

Alright I think I got it. I put in the new O ring and now the head comes up. Thanks