Originally Posted by caymann
So the question is, Can the SMI DUO do it? If so how, since there is no vacuum assist connection.
Thank you for taking the time to clarify your setup. If you can call Brett at SMI or any of the technical support staff and they ill be able to assist you further.
Since you are running an air brake equipped vehicle, you would be looking at at employing the SMI Air Force One
and not the DUO.
I find interesting that you do not have an electric hydraulic pump in your truck as a failsafe feature. Per your description, if the drive to the power steering pump fails you would be without assist for steering and brakes. It would appear that your vehicle's GVW (like my car) allows the manufacturer to omit that device.
The DUO has a built in compressor
. The intake air for the compressor is drawn from the vacuum side of the booster which is fed to a piston attached to the firewall that pulls a steel cable (under pressure - not vacuum) that is attached to the brake pedal. The DUO is always applied under vacuum assist just as if you were normally applying the vehicle brakes.
I was theorizing that if you had an electric hydraulic motor, pushing on the dead pedal would have spun up the electric motor thereby providing the pressure needed to apply the brakes.
Just a question on my part that I thought feasible to ask.