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 Post subject: Zenith Motor Rebuild
PostPosted: May Fri 05, 2017 7:23 pm 
Member

Joined: Jan Tue 22, 2013 5:49 am
Posts: 74
Location: Los Angeles, CA
Hi guys, I haven't posted in a long time but only because you have been so helpful. The forum has helped me fix a lot of my record players, so thank you!

Anyway, how do you rebuild a turntable motor? I would assume its very easy, but wanted to ask the pros on the forum.

Its a zenith 2g micro touch with the 45 spindle that sits in the platter, the console is x968 model from 1967.

Thanks!


Last edited by transfermotion on May Thu 11, 2017 7:56 pm, edited 1 time in total.

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 Post subject: Re: Zenith Motor Rebuild
PostPosted: May Sun 07, 2017 6:07 pm 
Member

Joined: Jan Wed 16, 2013 12:04 am
Posts: 1219
Location: 77001
Please post photos of your motor.

As this is the in-house Zenith record changer, it may
have a different style motor than GI or Alliance motors
that were used in the V-M manufactured Zenith changers.

Hotwax


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 Post subject: Re: Zenith Motor Rebuild
PostPosted: May Thu 11, 2017 7:51 pm 
Member

Joined: Jan Tue 22, 2013 5:49 am
Posts: 74
Location: Los Angeles, CA
Thank you for your response, I'm sorry for the delay. Hopefully these photos help to identify the motor.


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 Post subject: Re: Zenith Motor Rebuild
PostPosted: May Thu 11, 2017 9:35 pm 
Member

Joined: Jan Wed 16, 2013 12:04 am
Posts: 1219
Location: 77001
Great photos.
Motor looks to be similar enough to say an Alliance motor,
that you could use this thread as a start guide:
viewtopic.php?f=9&t=186294&hilit=restoration+zenith
Motor rebuild is near the end of page one ( a long page)

Your record changer's mechanism, though, is very different from the
V-M made Zenith in that thread.

So, I would also suggest to do searches on this phono forum as I know there are
threads regarding your Zenith in-house record changer with 45 adapter clam shell.
They address how to remove the platter, et cetera.

I didn't see a reference for the record changer in the Zenith X968 model
in Sams Photofact 879-9.
What is the model # for your changer ?

As you disassemble, document each phase with photos to reference when
re-assembling.
Any parts you need can be had from Gary at http://thevoiceofmusic.com
edit: Chris Cuff video of this changer : https://www.youtube.com/watch?v=SVODx5PxDSw
Hotwax


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 Post subject: Re: Zenith Motor Rebuild
PostPosted: May Fri 12, 2017 6:26 am 
Member

Joined: Jan Tue 22, 2013 5:49 am
Posts: 74
Location: Los Angeles, CA
thank you for all this great info! this is a cool record changer, especially if you like 45's

I have been having speed issues after I replaced the belt that goes around platter. Little did I know these changers have an idler. I am by no means a record player expert, but I think this might be my problem. Everything was oiling and dirty, so a little cleaning might do the trick. But, I am probably due for a new idler.

How do you clean the bearings? this puzzles me for some reason.

here are some photos of progress...


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File comment: Got the motor out. How do I clean and lube this? Are these the bearings?
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File comment: Changer assembly, look what I found!
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File comment: An idler wheel buried underneath, I thought this was just a belt drive!
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File comment: Cleaning the assembly.
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 Post subject: Re: Zenith Motor Rebuild
PostPosted: May Fri 12, 2017 4:04 pm 
Member

Joined: Jan Wed 16, 2013 12:04 am
Posts: 1219
Location: 77001
Wow, you are making great progress there !

RE: the bottom motor bearings and rotor/bearing.

Most people here recommend soaking these parts
in a solvent in a glass jar. The bearings have felt "lube wells" inside
the bearing housing. You can see that if you look at
the bottom housing.
The old gunky oil in the felt reservoirs can come back onto the
rotor shaft even if you clean the shaft squeaky clean.
It will slow down your motor.

I use 91 % isopropyl alcohol, as it is cheap and not
toxic like lacquer thinner or other solvents some folks
use. Be aware the alcohol is flammable as much as
other organic solvents.


I do two soaks and have never had problems with gunk
recurrence.
You'll see the alcohol wick out the grime/gunk and become
discolored. That's what you want.
Air dry for several days after cleaned. Then oil reservoirs with
Zoom Spout turbine oil.
Hotwax.

btw: I saw the inside photos of the console on your other post.
The components are really nice !
Yes, I bet those 15 inch woofers play Mr. Hendrix great.


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 Post subject: Re: Zenith Motor Rebuild
PostPosted: May Thu 18, 2017 8:03 pm 
Member

Joined: Jan Tue 22, 2013 5:49 am
Posts: 74
Location: Los Angeles, CA
Thank you Hotwax for your expertise and great help! I followed your directions and the turntable came back to life playing at correct speed! No need of a new idler, it just needed the motor rebuilt and a general clean up of the idler wheel and cam wheels.

This is the first time I've been able to hear this cool console with the restoration. Before it was playing at a slower speed that was unlistenable. At the correct speed it feels like the highs and mid range are coming through better, dunno.

Here is a video of the console playing little wing by jimi hendrix. I recorded in mono on a microphone and synced up to video from my phone. It shows of the dynamic range of the zenith.

https://vimeo.com/218047732


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 Post subject: Re: Zenith Motor Rebuild
PostPosted: May Fri 19, 2017 4:49 am 
Member

Joined: Jan Wed 16, 2013 12:04 am
Posts: 1219
Location: 77001
Super congrats on your efforts.
That is one good sounding console.
You can really hear the highs in the record.
Hope you enjoy it for decades to come.
Hotwax


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 Post subject: Re: Zenith Motor Rebuild
PostPosted: Jun Fri 02, 2017 3:50 am 
Member

Joined: Feb Mon 04, 2013 6:55 pm
Posts: 563
speed issues are often caused the the rubber motor mounts sagging with age. most units this old need new ones.


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 Post subject: Re: Zenith Motor Rebuild
PostPosted: Mar Thu 08, 2018 2:18 am 
New Member

Joined: Jan Mon 25, 2016 12:39 am
Posts: 1
I have 4 of these clamshell Zenith built units and they are all troublesome. I'm looking for some guidance on how to disassemble, what to clean, lube, and oil and what should be replaced systematically if anything. My biggest problem is the tonearm is "sticky" as it moves back out over the record and sometimes it does not retract out of the way fully and the LP literally hits the tone arm head when it drops on to the platter. There must be some oil turned to 'glue' that needs located, cleaned and replaced with fresh somewhere like the cobramatics get. I can't even get the platter to come off so there must be a trick and I've been hesitant to force it. Gary and VofM has such a guide for cobras but not clam shells. Much thanks


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