tournedos:

it's not like I'm going to need it myself for another week or two

He says as a funny squeel eminates from under the servo panel of his treasured Beogram and all arm movements seize to function

(sorry I couldn't resist!)

Vade retro!

The three other Beograms I have here should be able to cover for an occasional outage...

Actually these motors seem very sturdy (unless some other fault causes damage to them). I got the spare in hope it would be more silent than the one my 6000 currently has, but after following this thread, I think I'll just try to clean the old one. It emits a bit more "whiirrrr" than I would expect. Or thinking about it, perhaps it only needs new suspension foam inside the mounting enclosure!

I wonder if chartz might have removed any lube from the bearing with his contact cleaner. Might be worth pulling apart again and relubing...?

I also have a spare all metal motor from an early 4002 which hasn't been run for 20 years. Might give it a whirl see what it sounds like!

Hi,

I didn't use any spray, I just rubbed everything with impregnated paper, a bit of brasso too. I re-lubricated the ball bearings though. By the way I ended up opening the thing. You can actually take the red cap quite easily. The hardest is to take the pulley out!

As for the foam, I put the original back on, but changing it is an interesting thought, because then motor didn't seem so noisy on the kitchen table!

Olly, keep us informed!

Have you got a piccy of your motor. I don't remember a red cap but I will check. My 4000 has a clear end cap which allows you to see the brushes but sure they aren't accesable. my other spare has a grey plastic end. There are obviously a few varieties!

My name is Olly BTW.  I must do a 'Mika' and put my name down in my sig!

Pleased to meet you Olly!

No, silly me I forgot to take a photo while working on it. The motor is a Maxon Swiss made motor. Interestingly, there is no bearing on the brush side, which makes it easy to maintain.

Let me cover for you

Never would've noticed that red cap! And the brushes are tiny...

The foam is perhaps 3 times thicker at the places where the shell hasn't compressed it. It might allow a bit too hard contact with the shell when the belt is pulling the motor to one side as well.

Jaques

 You did so many fine repairs on it, dont stop now, change that foam, if the motor has kontakt to a hard surface you vil have noice and the foam has the same age as the TT, think about driver foam, same sh***

Thanks for the picture Mika! This is the one indeed!

Nice shot Mika! Thinking back maybe my motor did have a red back end...

Looked at my spare metal motor last night (with grey back end) and this has a similar hole revealing leaf brushes. No cap though. Obviously very nice motors but I would have thought they would have used carbon brushes...?

Regarding the compressed foam I suspect it will make little difference to replace it but it could be worth a try I suppose!

Yes I also expected carbon brushes!

I've seen too many disintegrated metal brushes in cassette decks!

The problem is they can't be repaired easily.

On my motor they do show wear. I'm pretty sure the metal dust that had gathered between the brushes and the rotor made the motor more silent, but the bad contacts caused the problem because of arcing.

Hi,

Is it normal that the 33rpm bulb blinks as the relay clicks when the arm detects the start of the record?

After the diagram, it seems that the bulb is an important part of the circuit. I guess that if the lamp is shot, detection won't work, or will it?

Yes the solenoid probably draws about 3 amps for 20ms or so - There will be quite a strain on the supply!

Regards the bulb, you mean the detector bulb? If so yes R36 and TR5 is effectivly a potenial divider delivering 9v to 15v ZD17. Bulb fails voltage raises and ZD17 breaks down forward biasing TR6. If you mean the 33 bulb then there is no effect as far as I can see.

Hello,

For those who used to follow this thread (thank you again) the 4002 is still working fine!

Glad to hear things are doing well Jaques :) I just bought another 4002 for restoration and the misses has said one has to go now - Looks like my B&O is going to have to earn it's keep in my house :(

Step1:

the misses has said one has to go now - Looks like my B&O is going to have to earn it's keep in my house :(

Oh well don't we love them Ollie? I mean the good ladies! 

As for me, I have plenty of room in my house!

In all honesty I have a wonderful understanding wife. You would know that if you saw the state of my 'computer workstation' behind the setee - my excuse is that if I took it all upstairs I would rarely see her!

Same here! Our wives could be friends and tell each other nasty things about us!