Garrard SP25 Mk4 - UK Vintage Radio Repair and Restoration Discussion Forum

valveaudio · 6th Aug 2020, 5:26 pm

The SP25 I have has a strange problem.
The motor "stalls" after a few minutes but turning the motor shaft by hand starts it again, it then stalls again.
This is without the turntable fitted.
If I turn the whole unit upside down the motor works perfectly.
I cleaned and relubricated the bearings to no avail.
Any ideas?

Trevor

ben · 6th Aug 2020, 5:28 pm

This rings a bell. Something about part of the rotor coming loose?

here it is

valveaudio · 6th Aug 2020, 5:49 pm

Thanks for the quick reply Ben.

I don't think this is the problem I just checked the disk which is drilled which is fitted to the lower end of the armature and it is firmly attached.
Is there another disk fitted to the top end of the armature? How do you remove the brass drive pulley so that you can remove the armature completely ?
There does not seem be any grub screws fixing it.

Trevor

valveaudio · 8th Aug 2020, 3:23 pm

OK problem solved, there is another disk at the top end of the armature and sure enough it was loose. Refixed with epoxy now OK.

Thanks

Trevor

6th Aug 2020, 5:26 pm	#1
valveaudio Hexode Join Date: Feb 2006 Location: Diss, Norfolk, UK. Posts: 386	Garrard SP25 Mk4 The SP25 I have has a strange problem. The motor "stalls" after a few minutes but turning the motor shaft by hand starts it again, it then stalls again. This is without the turntable fitted. If I turn the whole unit upside down the motor works perfectly. I cleaned and relubricated the bearings to no avail. Any ideas? Trevor

6th Aug 2020, 5:28 pm	#2
ben Dekatron Join Date: Aug 2006 Location: Madrid, Spain / Wirral, UK Posts: 7,498	Re: Garrard SP25 Mk4 This rings a bell. Something about part of the rotor coming loose? here it is __________________ Regards, Ben.

6th Aug 2020, 5:49 pm	#3
valveaudio Hexode Join Date: Feb 2006 Location: Diss, Norfolk, UK. Posts: 386	Re: Garrard SP25 Mk4 Thanks for the quick reply Ben. I don't think this is the problem I just checked the disk which is drilled which is fitted to the lower end of the armature and it is firmly attached. Is there another disk fitted to the top end of the armature? How do you remove the brass drive pulley so that you can remove the armature completely ? There does not seem be any grub screws fixing it. Trevor

8th Aug 2020, 3:23 pm	#4
valveaudio Hexode Join Date: Feb 2006 Location: Diss, Norfolk, UK. Posts: 386	Re: Garrard SP25 Mk4 OK problem solved, there is another disk at the top end of the armature and sure enough it was loose. Refixed with epoxy now OK. Thanks Trevor