(1964) TM 9-2320-211-35 Dept. of the Army Technical Manual Direct Support, General Support and Depot Maintenance for: Truck, Chassis: 5-ton, 6x6 M39, M39A2, M40…M748A2, US Dept. of the Army, p. 66.17 from TM 9-2320-211-35
Mack ENDT673 engine left side from US Army [http://babel.hathitrust.org/cgi/pt?id=uva.x004787254;view=1up;seq=266| Technical Manual 9-2320-211-35 page 66.17]
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