All of the manuals except for the AFC-W360 are "For Reference Only". They are simply the old original Walker manuals. They are not updated, nor corrected, nor are they complete. They are only published as a way of showing you how they were installed years ago on a particular aircraft in an effort to help the mechanic troubleshoot the sytem. In addition, the way we kit the actual AirSep may differ from what is shown in these old instructions. Again, they are "For Reference Only" which means you don't follow them blindly to install a new system, they are just guidance and can even be disregarded.