Technics SL-10 and SL-15 tonearm pulley gear chatter

snap, crackle and pop
leftypem
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Technics SL-10 and SL-15 tonearm pulley gear chatter

Post by leftypem » 20 Jan 2019 23:59

Finally posting here, as I am out of ideas. I'm nearing a complete tune up of a 1981 SL-10 I got about 8 years ago, and I've run into only one issue. The nylon gears that operate the tonearm pulley are chattering, loudly when pulling the grommet towards itself, and much less so (but still present) when driving in the opposite direction. I have made several videos of it, but here is the one I posted on YouTube:

[youtube]https://www.youtube.com/watch?v=4m5pyQ7uRzs[/youtube]

I know its related to tension on the wire, as if I use a tool to Help keep the main gear advanced against the worm gear, the noise goes away, but theres no way to tighten that wire. Are they known to stretch? the spring seems fine...

I've gotten all the old greas off of everything, and re-done using PTFE infused SuperLube, and new oil, caps, lid control microswitches, cueing fluid, and polished the worst marks out of the acrylic top. Maybe a pro refinish down the line.

I really love this TT, and it deserves to continue running.

By-the-by, I solved the premature reject issue by cleaning all the contacts and replacing the lid contol microswitches. No new wire necessary. :)

Spinner45
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Re: Technics SL-10 and SL-15 tonearm pulley gear chatter

Post by Spinner45 » 21 Jan 2019 04:45

Most likely the worm itself has some wearing due to age or stress.
Could be a small crack in it as well, that type of plastic is prone to that happening.
Cleaning both the gear and the worm, and inspecting with a magnifying glass would show any issues.

leftypem
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Re: Technics SL-10 and SL-15 tonearm pulley gear chatter

Post by leftypem » 21 Jan 2019 13:21

The only problem with that theory is that it was noise free 3 weeks ago before I cleaned it and replaced the grease. It is crack and chip free. Could it be that the older, much thicker grease muffled that noise?

who2018
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Re: Technics SL-10 and SL-15 tonearm pulley gear chatter

Post by who2018 » 21 Jan 2019 15:28

My SL-J2 had the same problem.
At the end I tried WD40 on the gears and after some skipping forewards and backwards it ran like new.
Just give it a try, maybe it works for you also.
Good luck!
By the way: great player.
Rgrds, Willem

jdjohn
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Re: Technics SL-10 and SL-15 tonearm pulley gear chatter

Post by jdjohn » 21 Jan 2019 15:56

For the sake of completeness, here are a few problem spots to check...if you haven't already:
- The tonearm motor belt (may have a 'memory' and be out-of-round)
- The tonearm pulley - did you remove the pulley, clean the post, pulley hole, and re-lube?
- The small gear that the worm gear turns - again remove and clean the post/hole
- Clean the slide rail that the tonearm assembly rides along
- Remove the tonearm assembly, and clean the tray underneath...also clean the bottom of the assembly

That last one is a big one if you haven't done it. That tray has a coating of grease, and if it gets sticky, the assembly won't slide properly.

Spinner45
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Re: Technics SL-10 and SL-15 tonearm pulley gear chatter

Post by Spinner45 » 21 Jan 2019 16:09

who2018 wrote:
21 Jan 2019 15:28
My SL-J2 had the same problem.
At the end I tried WD40 on the gears and after some skipping forewards and backwards it ran like new.
Just give it a try, maybe it works for you also.
Good luck!
By the way: great player.
Rgrds, Willem
I've mentioned it to others before, and so I'll mention it again to you as well.....
WD40 is crap, and should not be used anywhere near audio and electronics!

jdjohn
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Re: Technics SL-10 and SL-15 tonearm pulley gear chatter

Post by jdjohn » 21 Jan 2019 16:18

Spinner45 wrote:
21 Jan 2019 16:09
who2018 wrote:
21 Jan 2019 15:28
My SL-J2 had the same problem.
At the end I tried WD40 on the gears and after some skipping forewards and backwards it ran like new.
Just give it a try, maybe it works for you also.
Good luck!
By the way: great player.
Rgrds, Willem
I've mentioned it to others before, and so I'll mention it again to you as well.....
WD40 is crap, and should not be used anywhere near audio and electronics!
^True dat...in this case, NOT plastic safe for those gears.

who2018
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Re: Technics SL-10 and SL-15 tonearm pulley gear chatter

Post by who2018 » 21 Jan 2019 17:13

Why is WD40 crap?
If it works it is fine for me.
I agree electronics and WD40 is not a good combination but for cleaning ourposes it is fine.
For me it worked great on the small gears.

Spinner45
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Re: Technics SL-10 and SL-15 tonearm pulley gear chatter

Post by Spinner45 » 21 Jan 2019 17:36

who2018 wrote:
21 Jan 2019 17:13
Why is WD40 crap?
If it works it is fine for me.
I agree electronics and WD40 is not a good combination but for cleaning ourposes it is fine.
For me it worked great on the small gears.
You're new here, obviously, and not experienced.
I've been in the business for over 40 years, I should know what is best, and what is NOT.

Japi Roelofs
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Re: Technics SL-10 and SL-15 tonearm pulley gear chatter

Post by Japi Roelofs » 21 Jan 2019 17:39

I sometimes use WD40 to penetrate metal parts that are really, really stuck. But it should be cleaned off ASAP, and replaced with proper lubrication.

leftypem
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Re: Technics SL-10 and SL-15 tonearm pulley gear chatter

Post by leftypem » 22 Jan 2019 01:32

jdjohn wrote:
21 Jan 2019 15:56
For the sake of completeness, here are a few problem spots to check...if you haven't already:
- The tonearm motor belt (may have a 'memory' and be out-of-round)
- The tonearm pulley - did you remove the pulley, clean the post, pulley hole, and re-lube?
- The small gear that the worm gear turns - again remove and clean the post/hole
- Clean the slide rail that the tonearm assembly rides along
- Remove the tonearm assembly, and clean the tray underneath...also clean the bottom of the assembly

That last one is a big one if you haven't done it. That tray has a coating of grease, and if it gets sticky, the assembly won't slide properly.

Belt is brand new, everything was cleaned and regreased with SuperLube with PTFE. The only thing I haven’t tried is removing and reseating the worm gear completely from scratch.

leftypem
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Re: Technics SL-10 and SL-15 tonearm pulley gear chatter

Post by leftypem » 22 Jan 2019 02:34

I was not able to remove the worm gear from its metal plate mount, but I gave it a good press at both ends to insure it was fully seated. Still a little play in it.

https://youtu.be/IAOwfBIxSKM

Is SuperLube to thin for this? The old grease was much thicker and tackier. It was more like the Lucas Red n Tacky #2 I have on my shelf.

leftypem
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Re: Technics SL-10 and SL-15 tonearm pulley gear chatter

Post by leftypem » 22 Jan 2019 02:49

Red n Tacky is a bearing grease, btw. Direct linking images of the can and goop isn’t working, so here are some photo links.

https://drive.google.com/file/d/1WhXjL1 ... p=drivesdk

https://drive.google.com/file/d/1IFfOH5 ... p=drivesdk

https://drive.google.com/file/d/1DRImck ... p=drivesdk

Spinner45
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Re: Technics SL-10 and SL-15 tonearm pulley gear chatter

Post by Spinner45 » 22 Jan 2019 03:32

leftypem wrote:
22 Jan 2019 02:34
I was not able to remove the worm gear from its metal plate mount, but I gave it a good press at both ends to insure it was fully seated. Still a little play in it.

https://youtu.be/IAOwfBIxSKM

Is SuperLube to thin for this? The old grease was much thicker and tackier. It was more like the Lucas Red n Tacky #2 I have on my shelf.
Superlube is fine.
There should be no measurable play in the worm shaft.
There maybe a tiny burr in its groove causing the noise.

who2018
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Re: Technics SL-10 and SL-15 tonearm pulley gear chatter

Post by who2018 » 22 Jan 2019 12:27

Spinner45 wrote:
21 Jan 2019 17:36
who2018 wrote:
21 Jan 2019 17:13
Why is WD40 crap?
If it works it is fine for me.
I agree electronics and WD40 is not a good combination but for cleaning ourposes it is fine.
For me it worked great on the small gears.
You're new here, obviously, and not experienced.
I've been in the business for over 40 years, I should know what is best, and what is NOT.
Although I am only 62 years old I might be less experienced than you are, I am playing records since I was 15 and gradually improved the equipment and my skills ;-).
Apart from that, you are correct.

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