Mike P
Trade: Pickwell Audio
It was very apparent from the outset that Simon's unit had a few issues, both aesthetically and mechanically.
From a function perspective the major issues were an absolutely horrendous amount of slop in the stepped pulley bearings and idler wheel bearings.
The old stepped pulley bushes were pressed/pulled out and replaced. In this pic you can see the new bushes in the syringe being vacuum loaded with oil and the the filthy old worn our bushes.
20240328_101342 by Michael Pickwell, on Flickr
Goodness only know what the old bushes had been lubricated with but it looked like some sort of black grease. Anyway, they were absolutely knackered!
Bizarrely I also found that some muppet had fitted a motor thrust pad into the stepped pulley! The motor thrust pad is smaller and not the correct fit at all for the stepped pulley. This was of course duly swapped out for the correct item. Finally, the bearing well was sealed with PTFE tape to prevent the oil from leaking out.
Motor thrust pad versus stepped pulley thrust pad size comparison.
20240328_102528 by Michael Pickwell, on Flickr
From a function perspective the major issues were an absolutely horrendous amount of slop in the stepped pulley bearings and idler wheel bearings.
The old stepped pulley bushes were pressed/pulled out and replaced. In this pic you can see the new bushes in the syringe being vacuum loaded with oil and the the filthy old worn our bushes.
20240328_101342 by Michael Pickwell, on Flickr
Goodness only know what the old bushes had been lubricated with but it looked like some sort of black grease. Anyway, they were absolutely knackered!
Bizarrely I also found that some muppet had fitted a motor thrust pad into the stepped pulley! The motor thrust pad is smaller and not the correct fit at all for the stepped pulley. This was of course duly swapped out for the correct item. Finally, the bearing well was sealed with PTFE tape to prevent the oil from leaking out.
Motor thrust pad versus stepped pulley thrust pad size comparison.
20240328_102528 by Michael Pickwell, on Flickr