1218 cueing cylinder removal help

[Doug G.]

Well, Dual recommended grease for that application. It is still a fairly high friction area.

How else to explain the "rut" worn into the plastic cam gear?

The idea is to be careful and not get any of that grease where it doesn't belong.

Doug

 

[NoTransistors]

I have seen many hunderds of gears, none with 'ruts'. Are you certain that what you see was not moulded in?
You do realize that grease + grit = lots of wear? Even more reason to leave it clean and dry.

 

[Doug G.]

The O.P.s pictures of the rut definitely show a wear pattern and not a molded-in appearance.

I just can't imagine leaving that groove clean and dry considering the pressure and friction involved.

Dual evidently couldn't either. They specified Molykote for the 1019 and Alvania for the 1200 series.

In spite of the grease+grit argument, it is still better than no lubrication at all.

Doug

 

[NoTransistors]

Holy horse poop. I just looked at the pictures. Ain't never seen such wear in all the hundreds of gears that have been om my workbench. What does the tip that rides in the track look like?

 

[Doug G.]

Ok, I thought you had looked at the pictures already.

I have never seen one like that either. That's why I said it looks like somebody ran that without any lube.

Or is the tip missing?

Doug

 

[dd123]

Here's a pic of the tip and another pic of the rut. Holy horse poop is right! It is definitely a rut--a long indentation to the plastic. A bumpy indentation, not smooth.

The tip is nice and round and smooth, though not with a plastic or nylon cover that I've seen elsewhere. Can't imagine how it could press down into the plastic. A lot of heat maybe somehow? But why so much pressure against the gear? The previous owner was a teenager, but still... Maybe it's not the correct tonearm for a 1218 and the tip is too long?

Does the gear have to be replaced? I don't like replacing things without addressing the cause of the problem.
.

 

[Doug G.]

I think I would just reassemble it the way it is and grease it up good in the groove and see how it operates. If it is rough, replace the gear. If it seems smooth enough and doesn't slow the platter down excessively, use it as is.

Doug

 

[Doug G.]

:tears

:tears: My bad. It's been too long since I worked on turntables. Most cueing shafts have grooves on them to help retain the silicone.

Well, you are correct that most cueing pins have grooves in them. My BICs all have three grooves and BIC stressed making sure those three grooves are filled with silicone when reassembling the mechanism.

Doug

 

[dd123]

Possible clue

OK, does anyone know if a 1218 is supposed to have something in the threaded hole that the cueing lever has a cutout for - see pic. Mine had nothing there when I got it used.