‘RHM’ meaning

[jj95419]

Hi all,

Quite a quick question - I saw a 166 stopped at Weston. Just underneath the driver’s windscreen there is a yellow triangle with ‘RHM’ written on it. I tried to look at other posts but nothing explains what it means.

What does RHM stand for/mean please?

Thank you!

 

[Mag_seven]

Ride Height Modification

 

[FGW_DID]

To be route cleared for work in the West Region the LTV Turbos needed to be raised ever so slightly, it is just a case of mm.
All the 166 have had the mod done. There are 4 165 two cars complete (165122 is in the process)

 

[swt_passenger]

In practical terms (just for completeness) it means shims have been inserted between the bodywork and bogie.

 

[E_Reeves]

Why did they need to be raised? Does millimetres make such a big difference?

 

[AndyB28]

Just curious, but it sounds as though the change is quite small. What's it for?

Thanks.

 

[AndyB28]

Why did they need to be raised? Does millimetres make such a big difference?

Ha! Beat me to it!

 

[FGW_DID]

Why did they need to be raised? Does millimetres make such a big difference?

Just curious, but it sounds as though the change is quite small. What's it for?

Thanks.

Off the top of my head it’s approximately a 25 mm raise. I think it’s mostly to do with clearances on Platform edges.

 

[jj95419]

Ride Height Modification

Thanks mate, much appreciated!

 

[jj95419]

To be route cleared for work in the West Region the LTV Turbos needed to be raised ever so slightly, it is just a case of mm.
All the 166 have had the mod done. There are 4 165 two cars complete (165122 is in the process)

Great answer, thank you so much!

 

[jj95419]

In practical terms (just for completeness) it means shims have been inserted between the bodywork and bogie.

Ah I see, that makes sense, thanks a lot

 

[pdeaves]

Off the top of my head it’s approximately a 25 mm raise. I think it’s mostly to do with clearances on Platform edges.

Quite right. 25mm can be the difference between hitting something and not hitting something.