Ford 3000 lift issues please help

[2006gmcdmax]

I have a 73 or 74 ford 3000diesels. I was using it today to scrap a driveway, and as I was scraping with the box blade all the way down, and all of the sudden it pops up to the all the way up setting. I tried to get it back down with screw adjustment and little lever adjustment an nothing any ideas? The vavling and all was rebuilt very recently before I bought the tractor. I appreciate all help! Here's a pic

 

[2006gmcdmax]

Ndy on here knows anything about these

 

[medic0648]

This would be a better question for the ford forum, but have you checked the linkages for the 3 point controls? There should be 1 that goes between the 3ph lift arms and the sector valve controls and tells the valve where the 3ph is.

 

[2006gmcdmax]

I thought I was in the ford forum section haha and I haven't pulled the top off yet but that's what I was thinking too

 

[medic0648]

Do you have a service and owner's manual for the tractor. Some tractors the linkages are external, others are internal, you need to know where they're located and what's what.

 

[2006gmcdmax]

Yeah I do I called my ford dealer and he said they were internal so hopefully something just fell out