- Joined
- Dec 16, 2014
- Messages
- 85
Hello,
So, I am finally nearing completion of my 9A rehab. But, after getting everything running, there is a ton of noise coming from the gear train. After checking everything I have narrowed it down to the 80Tooth Idler gear on the Banjo.
With the gear mounted firmly on the bushing and in place in the gear train, there is a significant amount of wobble of the gear on the bushing. Checking the bore of the gear, there is some wear, mostly on one side, which I think is a major part. You can visibly and by feel rock the gear a little back and forth on the bushing shaft. It is much more pronounced when the gear is mounted and in place but still noticeable when just checking the gear to bushing. I'd guess maybe an extra thousandth than would be normal.
The other issue is about .011" gap between the hardened bushing and the gear which allows some side to side slippage.
I've read up on some cures to this, including boring out the gear for an Oilite bushing, and have seen a few replacement gears on ebay. But, I don't yet have a 4 jaw chuck, which I think is needed to zero out the run out on the gear bore.
So, my question to you guys is really about a question of "What would you do?" and also what to do about the .011" play on the bushing front to back? Have any of you folks measured yours? What is considered acceptable? I am unsure if this is a case of mixed/matched parts from a previous owner, or wear to the bushing? Or if its just the wobble induced in by the bad bore of the gear itself that is the sole issue.
Any thoughts appreciated.
So, I am finally nearing completion of my 9A rehab. But, after getting everything running, there is a ton of noise coming from the gear train. After checking everything I have narrowed it down to the 80Tooth Idler gear on the Banjo.
With the gear mounted firmly on the bushing and in place in the gear train, there is a significant amount of wobble of the gear on the bushing. Checking the bore of the gear, there is some wear, mostly on one side, which I think is a major part. You can visibly and by feel rock the gear a little back and forth on the bushing shaft. It is much more pronounced when the gear is mounted and in place but still noticeable when just checking the gear to bushing. I'd guess maybe an extra thousandth than would be normal.
The other issue is about .011" gap between the hardened bushing and the gear which allows some side to side slippage.
I've read up on some cures to this, including boring out the gear for an Oilite bushing, and have seen a few replacement gears on ebay. But, I don't yet have a 4 jaw chuck, which I think is needed to zero out the run out on the gear bore.
So, my question to you guys is really about a question of "What would you do?" and also what to do about the .011" play on the bushing front to back? Have any of you folks measured yours? What is considered acceptable? I am unsure if this is a case of mixed/matched parts from a previous owner, or wear to the bushing? Or if its just the wobble induced in by the bad bore of the gear itself that is the sole issue.
Any thoughts appreciated.