Seized spring box

[JerryVan]

This is stuck fast. I assume it should turn freely? Should it have a bearing fixed in the case that allows it to turn?

You're saying the shaft with the 2 gears on it is stuck fast? Yes, it sould turn freely. Get it loosened up, clean the bearing areas & grease it.

[Thomps]

Thank you, I’ll try that - should I take the shaft out? Ok not sure what kind of bearing holds it in- I can spray penetrating oil as is but do I need to do anything more?

[JerryVan]

Thank you, I’ll try that - should I take the shaft out? Ok not sure what kind of bearing holds it in- I can spray penetrating oil as is but do I need to do anything more?

It should be just a simple bearing, basically the end of the shaft in a close fitting hole. To be clear, the gears should not turn on the shaft. The whole gearshaft assembly should turn.

[Thomps]

Thank you - it’s a tiny space under the large cog to get to the bearing - penetrating oil will get in but I won’t get any grease near it without taking the shaft out

[JerryVan]

This is the other end of the stuck shaft, correct? Apply some penetrating oil here. You can drive out the shaft with a small brass punch and some light taps with a hammer. Shouldn't take much persuasion to get it out so don't go nuts on it. (The shaft end being the smaller diameter part inside the larger bearing.)

Screenshot 2024-12-27 164330.png (335.6 KiB) Viewed 499 times

[Thomps]

Thank you - it’s currently soaking overnight the other way up - I’ll try this tomorrow

[Thomps]

I soaked it for about 3 days and it was still stuck fast so I tried hitting it. That didn’t do anything either except slightly denting the end of the shaft. In the end I used a blow lamp to heat the case and then hit it to get the shaft out. I gave it a clean up with wire wool, greased and put it back together. At first it played slowly but after a couple of minutes it was up to full speed and seems fine now. Thanks for your advice