CMP Ford F60S

[Tony Smith]

Originally Posted by RichCam

Question - what is the round knob connected to a little change that goes through the chassis rail above the battery and underneath the driver's side of the cab?

It's the connection for the flexible tyre inflation hose.

On Ford trucks, the PTO Air Compressor was fitted to the right side of the gearbox, so the air line and connection were on the RHS chassis rail (Chev vehicles had these on the LHS).