08-27-2016, 09:21 PM
I got some time to pull the gearbox off of my lathe to see if there was anything obvious to explain why I couldn't get some of the levers to select their full range. When I first looked at the lathe, the issue was getting the feed control on the apron to work. However, once it was delivered, I also had issues with the selectors on the gearbox and though that perhaps something had shifted in transit. I was expecting to find a broken selector arm or something else jammed up in there.
There are only five bolts that hold the gearbox on. Four are in the back, accessible from behind the electrical panel and the other is one of the headstock bolts. These were all easy compared to the four shafts. Most of the work was getting pins driven out to achieve separation. The worse of them all was the spindle start/stop shaft, which I discovered someone had welded the handle hub to the shaft
Fortunately, the whole shaft was able to be driven out from the change gear end of the gearbox, as it only passes through and doesn't interact with anything. Handling the shafts was fun, given their length!
Some pics:
Banjo, some of the change gears and the arm (bottom left) had to come off. The change gears were slathered in red bearing grease. You can just see the recess where the headstock bolt lives that attaches to the gearbox.
The four shafts (left to right): Dog clutch (threading control), Spindle control, Feed shaft, Lead screw (already retracted):
Closeup of the aftermarket repair:
Guess where the serial number is located? Of course, I'd always think to look behind the gearbox! I still have no idea how all that swarf got there:
The business side of things. I should get a better picture but it was late and I was knackered!
This is where I left off last night. Hopefully today I'll get the apron off, as that is now the most likely source of my problems:
There are only five bolts that hold the gearbox on. Four are in the back, accessible from behind the electrical panel and the other is one of the headstock bolts. These were all easy compared to the four shafts. Most of the work was getting pins driven out to achieve separation. The worse of them all was the spindle start/stop shaft, which I discovered someone had welded the handle hub to the shaft
Fortunately, the whole shaft was able to be driven out from the change gear end of the gearbox, as it only passes through and doesn't interact with anything. Handling the shafts was fun, given their length!Some pics:
Banjo, some of the change gears and the arm (bottom left) had to come off. The change gears were slathered in red bearing grease. You can just see the recess where the headstock bolt lives that attaches to the gearbox.
The four shafts (left to right): Dog clutch (threading control), Spindle control, Feed shaft, Lead screw (already retracted):
Closeup of the aftermarket repair:
Guess where the serial number is located? Of course, I'd always think to look behind the gearbox! I still have no idea how all that swarf got there:
The business side of things. I should get a better picture but it was late and I was knackered!
This is where I left off last night. Hopefully today I'll get the apron off, as that is now the most likely source of my problems:
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