Wheels on the ground and chocked! Limestone blocks, huh?
Ok, make sure the side levers on the transmission are in neutral, regardless of where the levers are in the upper box. You should feel a solid detent (notch) when the mechanism inside the transmission slides into neutral- both levers. Loosen the clamps at the top of the rods- at the box in your pictures (they may be stuck), then adjust the two levers in the box, the C shaped levers/forks, until the C openings are aligned, then tighten the clamps on the rods that go to the transmission. When the box-ends are adjusted properly, the driver's shift lever should move freely toward and away from the steering wheel and between the two forks in the box without moving anything inside, or wiggling the shift lever. Put some fresh grease in the box, put the cover back on and try the transmission. If you still have trouble shifting, the trouble may be inside the transmission. The holes in the external side levers may also be badly worn, and cause trouble shifting, even with everything properly adjusted. But it is not uncommon to have trouble shifting one of those transmissions when the engine is stopped.
I don't remember if there are adjustment clamps at the transmission end of the shift rods, but I don't think so.
Another possibility is that the pivot pin in the driver's shift lever may be worn, which allows the lever to wobble around. If the shift lever seems solid, not loose and wobbly, that is probably all right.
Harvester
