Can the bearing race (identified by the yellow arrow) be removed through the front of the casing?  If so, how?

Thanks,
Chad

I just removed a similar bearing on a 955 transmission, which is a D-4 transmission.  The bearing was a roller bearing with cylindrical rollers The part of the bearing holding the rollers in place came apart and dropped 12 of the 15 rollers in the transmission.  I fished them out with a magnet.  I turned a ring which fit over and clamped to the race, then used a puller similar to a steering wheel puller to pull the race off the shaft. The split ring was held together with 5/16 inch socket head screws.  it took some time to tighten the screws with an Allen Wrench clamping the ring to the race  but it held the ring tight.  There was a 1/2 inch hole taped into the end of the shaft which I center drilled the head of a 1/2 inch  bolt and screwed it into the shaft to provide a center pint for the puller to keep it centered. My bearing race had a lip on each end so the ring would not slip off.  If your bearing race has a grove in it for the rollers of the bearing to run in, then make your ring so it fits into that grove.  To put the new bearing on, I screwed a piece of grade 8 all thread into the end of the shaft and used a nut, washer and the old race to push the new bearing on the shaft.  It was really tight and close but I was able to get the race off and new bearing installed without taking the transmission apart.  Brian Boaz
Picture # 1 The ring and the puller assembled as I used it
 
Picture #2  The ring and the puller taken apart 

Picture #3  The ring with the bolts that attach to the puller 

Great going Brian!! You can tell that you are a machinist!

Brian,
That’s a nice tool! I wish I had that capability.

Chad

bpusmc: If your bearing race has a lip on the outside or grove in the center and you can measure it with a set of calipers. I can measure the inside of my tool and see if it will fit your bearing race. if it will, I can send you my tool and you can use it to pull your bearing race off. If you have a puller like the one, I have pictured with a point on it. find out what size and thread the center hole in the shaft is and I can center drill a bolt to screw into the end of the shaft to hold a puller true. Isn't that what this ACMOC is all about? Helping and educating each other out to keep these old machines running. Brian Boaz

you can buy ready made bearing separators from any good industrial supplier, auto parts joint or tool shop. they come in a few different size ranges and for the smaller sizes under 100 bucks you can also get them as part of gear puller sets.

Use heat tip on a torch, heat it up quick, it'll slide right off.

    bboaz: Brian, thanks for your generous offer.The new race OD is 1.49” and is completely smooth, no lip or groove (see photo). I threaded a piece of 1/2” 20 allthread in the center hole in the shaft. To humor you, the last picture is my shade tree mechanic attempt at making a puller. I didn’t want to give up without trying something!! I’m anxious to get this thing put back together and really appreciate your help. 
Chad