SP 6143A-6169D

The twenty-seven four-unit ABBA sets of these units were originally delivered as class DEF-4, the middle "E" was dropped within a few years and became DF-4. The DEF-4/DF-4 A-units were built as follows:

	-65:12 gearing
	-1200 gallon fuel tanks
	-dynamic brakes
	-steam generator controls
	-no nose MU connections

These units were built as reserve passenger units with steam generator controls, but with no onboard steam generators. It was intended for them to run with their B units which were built with them. Over the years, various modifications were done to these units. Their associated B units became SP 8086-8139 in late 1949.Sixteen F7A units of class DF-4 were transferred to the T&NO in 1952-53 as T&NO 338-352. All came back to the SP and their previous 1949 numbers between 1957 & 1960 except T&NO 351-353 which remained on the T&NO. All of the A and B units were retired between 1959 and 1970 and sold to EMD or GE for trade on new units or scrapped as a result of wrecks.

SP F7A's - class DF4 - EMD const. numbers 6949-6982:

SP F7A's - class DF4 - EMD const. numbers 7106-7125:

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