101-07301 lock pin behind the Chuck

[watersteps]

Hello all, I disassembled my newly acquired 101-07301 6 inch lathe and cleaned up everything. I was looking for any broken or worn out parts. So far the only thing that I found that does not seem right is the locking pin in the "Back Gear" M6-241. The pin slides in to the step pulley M6-79. There is a small ball bearing, spring and a set screw that came out of the back gear. If I install the ball bearing and spring and screw in the set screw the gear locks up with the Back Gear Assembly M6-243X when you turn it. The set screw sticks out of the back gear OD.
I believe the set screw should be only .125 inch long not the .375 length that I have.
The locking pin should snap in and out to connect the back gear to the step pulley, yes,no?????

 

[Nogoingback]

Yes, it sounds as though you have it right. Engaging and disengaging back gear is a two step process:
Setting the pin in the correct location and engaging or disengaging the back gears themselves. If you
engage the back gears without changing the pin, it locks the spindle.

 

[LX Kid]

Yes I do believe your correct about the length of the set screw in the "bull" gear. I think if you can't locate another set screw you could put the existing set screw on a hex wrench and grind it down to size. Put some Locktite on the hex wrench because if it goes "flying" it's gone and no aggressive grinding!

 

[matthewsx]

Loctite loosens up with heat so I doubt it’ll work for grinding. Most any hardware store will have a selection of set screws though.

John

 

[watersteps]

Thanks Guys I ground it down a bit and it works fine now.