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Peter-E

Tone arm lift lever problem

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I have an issue I hope there's an easy fix for.
When I lower the tone arm is pretty much sticks for most of the lower then drops suddenly.
How do I fix this?
The TT is an AT-LP120XUSB
Thanks

 

Peter

PS I hope everyone is staying COVID free.

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Hmmm.  On an older table I would be guessing the damping fluid has dried out.  Maybe it is still that, or maybe there is something mechanically hanging up.   I would give it a clean (especially the sliding shaft if you can get at it, and make sure it hasn't rotated a bit and is fouling on something (don't know the 120 well enough to know if it can do that).

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If the same as yours you can try this.

 

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I agree, a clean of the tonearm lift shaft etc, then replace the 'well' with some silicone greese that is usualy very very thick. I used 300.000 thick gear oil from a hobby shop and it worked a treat on my old Yamaha PF800 TT.

If you can't find any suitable oil I have some here as you ony need to use a very small amount.

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54 minutes ago, Grumpy said:

I used 300.000 thick gear oil from a hobby shop

Great tip on where to buy it.  I will try my local shop.  I read somewhere that 300k to 600k cst  is the typical viscosity needed.

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1 hour ago, aussievintage said:

Great tip on where to buy it.  I will try my local shop.  I read somewhere that 300k to 600k cst  is the typical viscosity needed.

It was actualy a RC model car shop and it is used in the diff of those hot little racers.

 

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Thanks guys. What a speedy response.

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1 hour ago, Grumpy said:

It was actualy a RC model car shop and it is used in the diff of those hot little racers.

 

Yup. That's the stuff I used.

Buy a 30ml bottle, use 1 drop.🤣

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Can machine oil be used?
Or a silicone oil from Bunnings.
After all isn't dampening fluid just thin oil?

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2 minutes ago, Peter-E said:

Can machine oil be used?
Or a silicone oil from Bunnings.
After all isn't dampening fluid just thin oil?

No it's Quite thick oil more like grease

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22 minutes ago, EV Cali said:

No it's Quite thick oil more like grease

Yes again. The 'thickness' of normal motor is around SAE 30. The silicone gear oil that works is SAE 300,000+. In the bottle it 'flows' more like cold golden syrup (except of course it's not sticky😆).

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1 hour ago, Peter-E said:

Can machine oil be used?
Or a silicone oil from Bunnings.
After all isn't dampening fluid just thin oil?

NO! as mentioned above by EV and Greg

I did say l have some if you need it  -  you will be amazed at how little you need,

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2 hours ago, GregWormald said:

The silicone gear oil that works is SAE 300,000+

Just for accuracy I believe it 300,000 centistokes (cSt).  I don't think SAE even goes that high

 

Engine Oil Viscosity — NORTH QUEENSLAND INDEPENDANT FUEL SERVICES

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On 23/04/2020 at 12:54 PM, Grumpy said:

NO! as mentioned above by EV and Greg

I did say l have some if you need it  -  you will be amazed at how little you need,

Big huge thanks to Grumpy for providing some fluid. Job done. Tone arm drops nice and slow.
Looks like the design allows the fluid to just drop out over time?

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:sorry:

37 minutes ago, Peter-E said:

Big huge thanks to Grumpy for providing some fluid. Job done. Tone arm drops nice and slow.
Looks like the design allows the fluid to just drop out over time?

Message sent with lots of questions  - re the design

 

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Any progress @Peter-E ? Without actually seeing your TT I'm confused about the design allowing the fluid to drain from the queing device

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15 hours ago, Grumpy said:

Any progress @Peter-E ? Without actually seeing your TT I'm confused about the design allowing the fluid to drain from the queing device

Hi Gary,
It's all good now. the fluid worked fine.
The mechanism is basic as it gets. 
It's a brass rod that slide into a brass tube. I put fluid around the rod and that provides the friction to dampen the movement.

Is the bottom of the brass tube open or closed? If open over time the fluid will drain out over time.
Just cheap design.  

Cuing PIston.jpeg

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