m6800 cab with no reverse

[jonsstihl]

My father in law has an m6800 cab with the four speed transmission with hi lo and creep range so I guess thats 12 speed with the shuttle shift on the column for forward neutral and reverse. the tractor is a 2000 model year. with about 1800 hours

he has been having trouble lately with the shift linkages. he lost 3 and 4th gear a couple weeks ago so he took it to the dealer and they adjusted the linkage, and it worked fine after. Now he lost reverse on the shuttle shift.

just trying to help him out if anyone has any ideas if it is something simple

thanks

 

[rbargeron]

If this M6800 has the hydraulic shuttle I'd look for a linkage problem somewhere between the steering column lever and the valve (under the floorboard) - or maybe low oil level. Is the 3-pt hitch working ok? If the shuttle is mechanical see next post.

 

[Yankee Clipper]

If it is a mechanical shuttle, the shifter moves a collar in the front compartment to engage a different gear set to change directions.

Be sure the linkage moves all the way to the top of the transmission or it could be internal

Good luck