26-12-2018, 11:44 AM
(This post was last modified: 26-12-2018, 11:49 AM by Ruairidh Dunford.)
One of my last jobs this year was to start up the newly build mag engine destined for the Cup Model.
All went as planned except for a spinning noise as the revs built up - nothing at all when turning over??
I removed the timing cover plate and could see nothing touching or moving, no witness marks. I thought maybe a dry bearing so oiled everything and reassembled. Still there!
On discussion with others we jointly concluded that the vernier drive felt seal retaining ring must be spinning. I started the frustrating task of disassembling, again!
As I started to take out the idler gear I noticed this:
It was the gear at fault, not the pin. It is now all replaced and back up together.
A new one to me.
All went as planned except for a spinning noise as the revs built up - nothing at all when turning over??
I removed the timing cover plate and could see nothing touching or moving, no witness marks. I thought maybe a dry bearing so oiled everything and reassembled. Still there!
On discussion with others we jointly concluded that the vernier drive felt seal retaining ring must be spinning. I started the frustrating task of disassembling, again!
As I started to take out the idler gear I noticed this:
It was the gear at fault, not the pin. It is now all replaced and back up together.
A new one to me.