MF 2705 power shift

Problem is it works only in intermediate power shift, when I shift to either high or low it locks up and stalls the motor, even with the main transmission in neutral. In intermediate all gears work fine. Anybody have any ideas what I may have gone wrong?

First of all it depends on whether your 24sp input section was updated. The 1st inputs used a a hydraulic shuttle between high and reverse. They can be identified by having an H patern on the shift plate, The conversion was to an L pattern on the shift plate. The later producion tractors were produced this way. The tractor had to be stopped to shift into reverse which used the same drivetrain as low gear. Actually high gear is direct it runs through the multi disc pack. Intermediate requires no hydraulic pressure because it is engaged by the big belville washers. When shifting to low the oil is directed to the low plate engaging the the plate ate the same time oil is also directed to the intermediate pack to release it. The same holds true for High. These shifts are timed through the control valve timing pins. Which if installed wrong will drag ou the shifts. There is also a sleeve in the valve body that is lock-tited in place at a critical depth. They have been known to move or were installed wrong. The best way to troubleshoot this transmission is with 3 guages one on each pack observing the pressures.

Tom
Dold Implement Co.
Howard, SD 57349
605-772-4541
[email protected]