301a roar
#1
Super Member
Thread Starter
Join Date: Mar 2016
Posts: 2,887
301a roar
I've had this machine for a while and just assumed that it was fine and the only problem was the missing set screw. In fact, I had already brought it into the house before I found the cord and controller.
I finished up the oiling and greasing this afternoon and gave it a spin. It roared (maybe an exaggeration, but can't think of a proper description). It's in/around the upper gears. It starts off fine then goes to roar as you speed up, then quiets after it gets up to near full speed. It sounds like metal to metal to me. (I'm certainly no expert.)
Could it be a bearing?
It sounds like it's coming from the circled area. I dropped another couple of drops in that oil hole and it quieted some.
Is this a case for the drop of 30 wt. oil? Or just keep oiling it?
bkay
I finished up the oiling and greasing this afternoon and gave it a spin. It roared (maybe an exaggeration, but can't think of a proper description). It's in/around the upper gears. It starts off fine then goes to roar as you speed up, then quiets after it gets up to near full speed. It sounds like metal to metal to me. (I'm certainly no expert.)
Could it be a bearing?
It sounds like it's coming from the circled area. I dropped another couple of drops in that oil hole and it quieted some.
Is this a case for the drop of 30 wt. oil? Or just keep oiling it?
bkay
#2
Senior Member
Join Date: Apr 2020
Location: South of St Louis
Posts: 833
I would try running it up to the point of the noise, hold it steady there, and push around on parts in the top end with a wooden dowel, or something similar, to see if there's something loose enough causing some vibration that might be minimized with the pressure. I'm thinking of a 66 I was having problems with, was binding somewhere, I oiled and oiled in all the oil holes and it seemed to spin better briefly, but never correctly, then Leon pointed me in the direction of the nose end of the machine and that's where the problem was, fixed it with a gentle pry with a screwdriver.
#3
Super Member
Thread Starter
Join Date: Mar 2016
Posts: 2,887
I just left it overnight. It's as quiet and smooth as it can be this morning. So, I gave it a couple of drops more of oil in those three oiling points and I'm going on down the road.
I think I'm going to like this machine.
bkay
I think I'm going to like this machine.
bkay
#6
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Thread Starter
Join Date: Mar 2016
Posts: 2,887
It worked, so I added a couple of more drops of oil to each oiling point. I actually used Hoppe's gun oil, as the bottles have a precise small dispensers. I love the containers. I use the gun oil and refill the containers with sewing machine oil. As I understand it, they are the same type of oil.
bkay
#7
Super Member
Join Date: Sep 2015
Posts: 1,963
With these old machines it usually pays off to keep on oiling. It takes time for oil to seep into inners of gears, hinges and joints, especially those vertical and horizontal turning rods can need more than a drop or two. As old grime and dired up lubricant dissolves, keep on oiling to flush it out, wipe off and repeat. It can be hard to identify the exact point causing the trouble, so you just have to go about it in a more general way. Several have had good result with the TriFlow oil in areas like this, I think it was the girl with The Archaic and the Arcane blog that first made me aware of it.