Gear linkages Deere 6506

[beltbreaker]

Struggling to get into F on our 6506, it goes into E fine but won't go into F. When coming out of E it isn't inline with the neutral which makes me think the linkage needs adjusting.

If so how would you go about it and has anyone else got any other theories before I dive on for a look?

 

[nick...]

I’d have a look under the tractor for stones stuck between linkage and transmission.had similar issues with a 6800 we once had
nick...