M105S

[NHbalerman]

I just joined and thanks for letting me join on my M105S I am having trouble with the steering pump at first it was the main hydraulic pump it was sucking air fixed that all working good now when you start it the steering won't work and PTO and shuttle shift have to raise front end with loader and work steering awhile and it finally starts working and drives normal but if you idle it down it loses prime I have checked all the suction hose replaced the rubber part it is tight going into pump new oil new filters 8 can't figure it out is there any where I can check? Do they have some kind of check valve to keep the pump primed? Thanks for any help

 

[Tx Jim]

It's odd you state you just joined because it shows you joined on Oct 7, 2007. I think your guess is correct in that there's a faulty check valve but I don't know where it would be located. I suggest to post your question on OrangeTractorTalks forum. at the following link. https://www.orangetractortalks.com/forums/