Installing Electric steering column

[wade]

Hey guys

Is there anywhere that details any requirements on this specific modification?

I had a look through a few of the standards but couldn't find anything.

What I'm wanting to do is convert my power steering rack to a manual steering rack and install an electric steering column into my car. I'm aware that work to the rack has to be done by a specialist but is there any specific information on the installation of the column ?

Thanks

[Chris]

Mar 6, 2021 15:23:19 GMT 12 wade said:

Hey guys

Is there anywhere that details any requirements on this specific modification?

I had a look through a few of the standards but couldn't find anything.

What I'm wanting to do is convert my power steering rack to a manual steering rack and install an electric steering column into my car. I'm aware that work to the rack has to be done by a specialist but is there any specific information on the installation of the column ?

Thanks

Hi Wade

This is best discussed with your certifier before you start as it can be quite complex, but I'll drop some info below to try and help out to start with.

Of course, all the usual steering system requirements must be met - www.lvvta.org.nz/shop/chapter-7-steering-systems/ (free download)

Also when certifying an EPAS modification, there are specific items that must be inspected 

• There can be no internal welds or pins that are not OE
      this is best to be stripped and assessed by a steering specialist like PG hydraulics who can provide the necessary report
• EPAS mounting must be sufficient to support the components from significant rotational and torsional loads
      for example - a dash bar spanning left to right attached to the A-pillars with load spreading plates at each end
              a torsional force in excess of 60nm/45lb.ft. can easily be generated by the driver and steering system combined
• All couplings must be a tight tolerance fit to the shaft and where grub screws are used, they must seat in dimples and have appropriate locknuts
      this can be tricky where the coupling is inside a steering column sleeve and are difficult to inspect
• All modifications that are concealed once installed should be over engineered as WoF inspection will not catch them as they begin to fail
• The certifier must be 100% satisfied of the steering system function and performance on the road test, noting that fine tuning controllers are available

Also to help, here is a snippet from the LVVTA newsletter.


Hopefully that will help

Cheers

Chris