This image was recently uncovered by two brothers that attended school at LeTourneau College from 1960-1963. LeTourneau College became LeTourneau University in 1961. The foreground-right tire shows a pretty good vantage of the shocks used on the Mark II. Looking beyond the shock and in the center of the trailers you see a darker colored cylindrical object and a downward facing light colored tube. This is the axle blower motor and intake. This blower pushes air through the axle housing to keep R. G. LeTourneau’s Electric Drive nice and cool.

Overland Mark II at Longview, TX. Image: Lloyd and Larry Smith