TD160 Motor knock

[Jac Hawk]

As some of you know i recently acquired a Thorens TD160, not because it's the best deck in the world but it's the deck that has a great many memories for me and was the deck my late father gave to me which started my ongoing love of HiFi, sadly i no longer have that deck, but earlier on this year it became an itch that i needed to scratch and as i've mentioned i got another one.

So bringing everything up to date, i got a deck, an arm and went about some restoration and upgrading, however the motor which must be as old as i am has started knocking, i've purchased a thrust bearing but it hasn't helped, is there anything else i can try or would i be better off looking for a new motor?

[struth]

Check belt is OK. Also the suspension can cause that if its out of kilter a bit.

[walpurgis]

Have you checked the motor bearings for wear (lateral slack) and endfloat?

[Jac Hawk]

It has a new belt, the suspension has been adjusted and levelled, i've oiled and serviced the motor as much as possible even adding a thrust bearing as i've read that endfloat is often the cause of the knock, i have noticed that there is a slight wobble as the pully spins round, i'm not sure if the wobble is actually from the motor shat or the pulley, but maybe the motor has had a knock through it's life, the deck the motor is from is a MK1 so it didn't have the protection post which was fitted to later models and maybe the motor has suffered minor damage which i can only assume happened years ago and has had a cumulative adverse affect.

[struth]

did it start with new belt? yes the shaft could be loose slightly or be bent. thrust plate issue too. if you can run it on its side you might see whats causing it. they are fairly simple so there isnt too much can cause it

[Jac Hawk]

did it start with new belt? yes the shaft could be loose slightly or be bent. thrust plate issue too. if you can run it on its side you might see whats causing it. they are fairly simple so there isnt too much can cause it

The deck hadn't been used in years, once i rebuilt it initially i ran it with it's original belt and noticed that it had a knock and that it was running a little fast, so i changed the belt and got a thrust bearing, the motor speed is still a little fast but not so much as it has an audible effect and probably stylus drag will slow it down to so it's as close as damnit, but the motor knock is a persistent problem, i'll do some further checks as suggested

[walpurgis]

What oil did you use on the motor bearings? If it's too thin you might get some chatter, but not something that could really be described as knocking.

[Jac Hawk]

What oil did you use on the motor bearings? If it's too thin you might get some chatter, but not something that could really be described as knocking.

3in1 believe it or not, 1 drop that's all and apparently it's the oil recommended by many as the best to use on the platter bearing which surprised me a bit.

[walpurgis]

3in1 believe it or not, 1 drop that's all and apparently it's the oil recommended by many as the best to use on the platter bearing which surprised me a bit.

Should be OK.

[Jac Hawk]

Should be OK.

were you expecting some sort of elaborate oil infused with ground unicorn horn and dragon blood costing thousands a drop