Woodruff Key Slot Worn Out HELP!!!!!??? - Mercedes-Benz Forum

 
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post #1 of 2 (permalink) Old 07-26-2009, 07:24 PM Thread Starter
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Date registered: Jan 2009
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Post Woodruff Key Slot Worn Out HELP!!!!!???

Hello all,
I noticed a small oil leak from the front end of my 1987 300SDL. I figured it was the front crankshaft seal so I set about pulling it all apart. Anyhow when I pulled the flange off, the notch for the key in the front of my crankshaft is about doublewide from what it should be. I dont want to have to replace the crankshaft. Any suggestions? I am in the process of making a round drill jig that will bolt to my engine centered on the crankshaft and pivot around the seam between the flange and the crankshaft. I will put a .2490" drill/endmill in my mounted drill and drill out 3 holes centered on that seam in a triangle. Then hammer three .2500" stainless dowell pins in from the front. Does this sound like it will work and last a while? Any other suggestions?? I dont want to rig it but if this seems like it will work permenantly then I will do it. If you see any issues in doing it then please let me know I will probably do this next week come monday. I have the jig made but I have to mount the drill to the jig to rotate with the bit cenetered on that seam. I havent had much luck with anyone answering any of my questions on here so hopefully this one generates some response.
Thanks,
Alex
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post #2 of 2 (permalink) Old 07-28-2009, 05:56 AM
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Drilling all those holes will weaken the shaft, the best fix is to take it to a machine shop and they can weld the key slot shut and then machine a new key slot in it. We repaired many shafts with this method when I was in the navy.
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