Williams Electric Trains F-7 Diesel Locomotive Cab Off View

With the cab bodies removed, this page illustrates the evolution of Williams F-7 power units from 1982 through 1984. The 1984 version remained standard until 1990, when the locomotives were upgraded. Photos courtesy of the B. DeBrooke collection.

Williams 1982 F-7 power unit chassis with a single motor and no traction tires. These units were sold in sets and not available for separate sale. Note the one pound weight added at the rear of the chassis for traction. With no reversing unit, the locomotives operated in forward only. The pulling power of the single motor units was so weak that Williams included a coupon in their sets to purchase an additional F-7 powered locomotive for only $39.95. Single motor F-7 power units were included in Williams sets through at least 1983.

Williams 1983 separate sale F-7 power unit chassis with two motors and no traction tires. Note the two one pound weights added to the chassis for better traction. The locomotives did not come with a reversing unit. However, Williams preinstalled an e-unit bracket. A Lionel e-unit could then be mounted and wired by the purchaser, as seen in the photo.

Williams 1984 F-7 power unit chassis with two motors and Williams "Sure Grip Traction" system, which consisted of two traction tires on each set of trucks. Note the half pound weight added at the rear of the chassis for traction. Williams included electronic reverse units in these locomotives as standard equipment.

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