I've been working on and sprucing a 9A that my Uncle years ago. I don't know the history as my Uncle worked for the state and bought the lathe at a government auction. He piddled with it off and on for a few years then bought a larger more modern lathe and gave me the 9A.
I built a stand for it a few years ago and used it for small projects. There were problems with the motor, the chuck was wore out and the bearing was out of the live center. After replacing al three items and fixing some other stuff I took all the gears off and cleaned them and the lathe. After cleaning it up I ran the lathe, everything was fine until I put the quick changes levers in their highest settings.
The lathe didn't want to start and when it did it was obviously loaded very heavy. I looked in the qcgb and it was gunked up badly so I removed it and soaked it in the parts washer over night. The next day I scrubbed it up good and let it dry for a couple days then lubed it up good and reinstalled it. Same deal.
If I take the RH lever on the gear box and disengage it the lathe runs smooth and easy to turn by hand. Engage the lever and again it acts as if it's bound up. So again I removed the gear box, this time I took it apart and cleaned all the gears checked the shafts lubed and reassembled. Same deal, everything turned smooth after I assembled the gear box before installing.
You can hear a cyclical noise as it runs that gets louder, it will eventually stall the motor. Nothing is hot to the tough when it does this. In the lower speed settings it has enough power to run.
Both times I've had it apart I left about .020" of end play on the lead screw. I removed, cleaned and lubed the apron and saddle before doing any of the above. Everything seems to be good there.
Tomorrow I'm going to remove the qcgb again and take the main screw out and install it without it and see what happens. I'll check the main screw for straightness while it's out.
Any ideas? I'm not a machinist so I hope this makes sense.
Thanks, Justin
I built a stand for it a few years ago and used it for small projects. There were problems with the motor, the chuck was wore out and the bearing was out of the live center. After replacing al three items and fixing some other stuff I took all the gears off and cleaned them and the lathe. After cleaning it up I ran the lathe, everything was fine until I put the quick changes levers in their highest settings.
The lathe didn't want to start and when it did it was obviously loaded very heavy. I looked in the qcgb and it was gunked up badly so I removed it and soaked it in the parts washer over night. The next day I scrubbed it up good and let it dry for a couple days then lubed it up good and reinstalled it. Same deal.
If I take the RH lever on the gear box and disengage it the lathe runs smooth and easy to turn by hand. Engage the lever and again it acts as if it's bound up. So again I removed the gear box, this time I took it apart and cleaned all the gears checked the shafts lubed and reassembled. Same deal, everything turned smooth after I assembled the gear box before installing.
You can hear a cyclical noise as it runs that gets louder, it will eventually stall the motor. Nothing is hot to the tough when it does this. In the lower speed settings it has enough power to run.
Both times I've had it apart I left about .020" of end play on the lead screw. I removed, cleaned and lubed the apron and saddle before doing any of the above. Everything seems to be good there.
Tomorrow I'm going to remove the qcgb again and take the main screw out and install it without it and see what happens. I'll check the main screw for straightness while it's out.
Any ideas? I'm not a machinist so I hope this makes sense.
Thanks, Justin