Transmission work on the MX150

Update. After 2 weeks of making hay and corn silage, back to the fun. First picture is with the bearing carrier housing removed. The forward and reverse clutches are the top shaft in the rear housing. Second picture is the forward and reverse clutch shaft assembly.

Do not use open flame to heat bearings for installation. I suspect that is what happened to these two bearings.

Back to work on this project. Never did get it finished last year, ran into some problems that needed to be addressed before the transmission got wheeled back together. The worse of the two problems was a worn bore where the MFD output shaft comes out of the transmission housing. Where the bearing cups ride the housing is worn more than .020 over size. Planning to bore the housing to accept a bearing with a bigger cup OD. Need to recut the snap ring grooves also. Not a real expensive deal but going to be time consuming.

More pictures of the trans work on the MX150. Reboring the MFD outpost shaft bearing bore. First picture is some of the frame for the boring bar setup. Second picture is
closer up to the bore, shows the Enco automatic boring head. Third picture is the finished product, honed to final size.

Then on the other end of this axis, the bore that serves to supply the oil pressure for the MFD clutch has to be redone also. Something bad must have happened to the original bore, and some ham fisted wrench thrower took a twist drill and hacked the bore larger (see the chatter marks around the pilot hole at the rear of the bore), cut a crude sleeve, and glued it in with Loctite. That sleeve was worn, and its straightness and concentricity were suspect, so time to rebore it and make a new sleeve.
First picture is after being rebored.
Second picture is the setup. The support for the MFD clutch shaft was used to support one end of a pilot, the other end was in the counterbore of the main housing.
Third picture is the components used to do the boring; a pilot sleeve, a spindle to fit in it, a end mill to do the actual boring, and a drill adapter to drive the spindle and end mill. Took days to make the parts, minutes to do the actual rebore.
Fourth picture is the new sleeve. Made of stress proof steel.
Last picture is sleeve installed. Little bit of interference fit plus some Loctite 680.

The MX150 is back at work. For some reason I never mentioned that the forward clutch dragging was not caused by a fried clutch pack/warped plates. They were due for replacement but not destroyed. Apparently the problem was a tooth broken off a friction disc had lodged in a hole of the clutch drum which prevented the full release of the clutch pack.