Class 458 Yaw Dampers (or lack thereof)

[gabrielhj07]

Hi all,

I was looking at Class 458 photos when I noticed the lack of yaw dampers on the /5 units, while they are present on the /0 units.

Does anyone know why these were removed during their reformations, and if they are likely to be reinstated when the units are shortened?

Attached for reference is my photo of a /5 bogie, and a /0 photo from trainlogger.co.uk

 

[swt_passenger]

Hi all,

I was looking at Class 458 photos when I noticed the lack of yaw dampers on the /5 units, while they are present on the /0 units.

Does anyone know why these were removed during their reformations, and if they are likely to be reinstated when the units are shortened?

Attached for reference is my photo of a /5 bogie, and a /0 photo from trainlogger.co.uk

They wouldn’t normally fit yaw dampers to 75 mph units, so it is likely they were intentionally removed during conversion, and like you I expect they’ll have to go back on...

 

[gabrielhj07]

They wouldn’t normally fit yaw dampers to 75 mph units, so it is likely they were intentionally removed during conversion, and like you I expect they’ll have to go back on...

Thanks,

Would that not have been a bit of unnecessary hassle to take them off, rather than leaving them in place?

 

[swt_passenger]

Thanks,

Would that not have been a bit of unnecessary hassle to take them off, rather than leaving them in place?

I guess they assumed they’d never be converted back. Probably a reasonable call at the time, but you’d think they’d be relatively maintenance free. Perhaps there was an identifiable maintenance saving.

 

[43096]

Thanks,

Would that not have been a bit of unnecessary hassle to take them off, rather than leaving them in place?

It’s a maintenance saving. Don’t fit something that’s not needed - it just costs more to maintain.