I've got a New Departure Model D that I recently reassembled. It works fine and brakes well however just before I come to a complete stop it makes a knock that I can hear and fell through the pedals. Any ideas?
New Departure noise
- Thread starter jklier
- Start date
Help Support Rat Rod Bikes Bicycle Forum:
It's definitely not coming from up by the crank. However when I just spun it up on the bike stand and hit the brake I saw the chain sprocket at the hub slip forward a bit when the noise occurred. So something is slipping inside and allowing the sprocket to move a tiny bit.
jklier said:
The cone/nut on the back side of the chainwheel is not tight enough. Also, to prevent it from coming back you might try shimming to close the clearance where peg from the crank fits into the hole in the chainwheel.
Is the cone nut you are referring to listed as part D7 on the diagrams in this thread?
viewtopic.php?f=3&t=30484
viewtopic.php?f=3&t=30484
dougfisk said:
jklier said:
Ok, I didn't read carefully enough, I was imagining to the chainwheel slipping on the crank. Strike that for now.
If you see the cog (D-17) slipping in relation to the driver (D-2), then it may be that the threaded cog (D-17) and it's locknut (D-5) are a little loose. Very unusual... did you have them disassembled?
Here's the video. It doesn't look like much but under load that little turn at the end is fairly loud and noticeable. Definitely not normal.
http://www.youtube.com/watch?v=vCVj7YPMulc
http://www.youtube.com/watch?v=vCVj7YPMulc
That is bizarre. The only thing I can offer is to take it all apart and rebuild it again. Maybe you missed something or something came loose during assembly and you didn't see it. Not commenting on your skills, just saying.jklier said:
If it does it again after rebuilding, then you definitely have a problem somewhere. If not, then you're golden.
That's what I would do anyway.
Check the brake arm strap it might be moving up and down enough to make a clicking noise as you brake, the other thing to check would be the clutch that moved in and out on the corkscrew, it might need a little oil or grease to allow it to go back and forth as it engages and disengages when you stop and start.
What's the word on this? Is it fixed yet? Keep us updated, man.
Thanks for asking. I didn't have time to mess with it much over the weekend as I spent my time adding lights to the bike. However the problem isn't happening as often now. I'll check go through this thread and do everything suggested. If it persists I'll take it to my LBS. They rebuilt the one on my military Huffman and it works well.
Well hurry up! This is bothering me.
Bigger problem I have right now is finding a lay back seatpost in 13/16. I don't have a torch or welding rig so making one myself is not possible. I've tried contacting some local frame makers but no response back from any of them yet. I may try going to the local bike salvage and see if there are any handlebars in that size I can cut up.
