asstor
New member
- 35
- 0
- 0
- Location
- Austin, TX
Hi guys.
I am doing a complete nuts and bolts restoration of an early 1951 M37. You can check out my progress at www.m37rebuild.com.
I have run in to a problem with the transfer case rebuild I can use some advise on. Upon stripping the xfer case I discovere that the input shaft from the transmission has pretty sever damage to the roller bearing journal. It has develeop a condition known (as I have learned) called brinelling. It is caused by excessive vibration on the bearing. As the bearing is locked by the HI/LOW dog clutch when the xfer case is in high range, the needle rollers eventually create long dimples in the bearing journal. Check out the picture below.
![DSC02158.jpg DSC02158.jpg](https://www.steelsoldiers.com/data/attachments/354/354270-4e131687bda7721b799c19832e150921.jpg)
Getting a replacement shaft is near impossible. I eventually found a NOS shaft from one of the usuall suppliers. Unfortunately it is even in worse shape from sitting on the shelf for 60 years.
![DSC02156.jpg DSC02156.jpg](https://www.steelsoldiers.com/data/attachments/354/354269-4a8e48caa6dcf1ddf2f52a069d453126.jpg)
The question is, which one of the two do you recommend I use? Which is the better of the two evils?
I have though of a third possible solution. I have a lathe with a tool post grinder, so I can machine and re-grind the journal and then replace the needle bearing with a sold bronze bearing that I can machine to the correct clearances.
I know the journal can also be repaired by metal spraying and the re-grinding, but I believe that is not a good solution for needle bearings and the cost may be prohibitive.
Any thoughts?
Thanks to all.
Louis Barkhuizen![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
I am doing a complete nuts and bolts restoration of an early 1951 M37. You can check out my progress at www.m37rebuild.com.
I have run in to a problem with the transfer case rebuild I can use some advise on. Upon stripping the xfer case I discovere that the input shaft from the transmission has pretty sever damage to the roller bearing journal. It has develeop a condition known (as I have learned) called brinelling. It is caused by excessive vibration on the bearing. As the bearing is locked by the HI/LOW dog clutch when the xfer case is in high range, the needle rollers eventually create long dimples in the bearing journal. Check out the picture below.
![DSC02158.jpg DSC02158.jpg](https://www.steelsoldiers.com/data/attachments/354/354270-4e131687bda7721b799c19832e150921.jpg)
Getting a replacement shaft is near impossible. I eventually found a NOS shaft from one of the usuall suppliers. Unfortunately it is even in worse shape from sitting on the shelf for 60 years.
![DSC02156.jpg DSC02156.jpg](https://www.steelsoldiers.com/data/attachments/354/354269-4a8e48caa6dcf1ddf2f52a069d453126.jpg)
The question is, which one of the two do you recommend I use? Which is the better of the two evils?
I have though of a third possible solution. I have a lathe with a tool post grinder, so I can machine and re-grind the journal and then replace the needle bearing with a sold bronze bearing that I can machine to the correct clearances.
I know the journal can also be repaired by metal spraying and the re-grinding, but I believe that is not a good solution for needle bearings and the cost may be prohibitive.
Any thoughts?
Thanks to all.
Louis Barkhuizen
Last edited: