Hercules_DFXE

Hercules DFXE

Hercules DFXE

Engine

The Hercules DFXE was an American diesel truck engine produced by the Hercules Engine Company.

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Part of the Hercules DFX series, the DFXE is a naturally aspirated, direct injection,overhead valve, inline six-cylinder engine.[1][2] The engine had a displacement of 855 cu in (14.011 L), with a bore of 5+5⁄8 in (143 mm), a stroke of 6 in (150 mm) and a compression ratio of 14.8:1.[3][4] It developed 201 bhp (150 kW) at 1,600 rpm and a maximum 685 ft⋅lbf (929 N⋅m) of torque at 1150 rpm; 660 ft⋅lbf (890 N⋅m) at 1600 rpm.[5][6]

The DFXE was designed to requirements of the British Purchasing Commission for use in the Diamond T Model 980 tank transporter. As the Diamond T Model 980 was later adopted by the US, the DFXE was one of the few diesel engines used by US tactical trucks during World War II.[7][8]

The engine was used in upright or horizontal configurations.[9]

It was used in the Diamond T Models 980 and 981 trucks in World War Two, the Le Tourneau Model B29 Tournapull earthmover (introduced in 1945),[10] and the Oliver OC-18 crawler tractor (introduced in 1952),[11] among others.

Notes

  1. [1]
    TM55-1031, p.5.
  2. [2]
    Ware, p 29.
  3. [3]
    TM55-1031, p.5.
  4. [4]
    Ware, p 29.
  5. [5]
    TM 9-1768A, p 4.
  6. [6]
    Ware, p 46.
  7. [7]
    Doyle (2003), pp. 230–231.
  8. [8]
    TM 9-768 (1944), pp. 136–140.
  9. [9]
    TM55-1031, p.5.
  10. [10]
    Orlemann, p 33.
  11. [11]
    Wendel, pp 601-602.

Sources

  • Berndt, Thomas. Standard Catalog of U.S. Military Vehicles 1940–1965. Iola, WI: Krause Publications, 1993.
  • Doyle, David (2003). Standard catalog of U.S. Military Vehicles. Krause Publications. ISBN 0-87349-508-X.
  • Orlemann, Eric R. LeTourneau Earthmovers. St Paul, Minnesota: MBI Publishing Co, 2001.
  • U.S. Department of the Army. TM 9-1768A: Tractor Truck M20, Component Of 45-Ton Tank Transporter, Truck-Trailer M19, Engine, Clutch, Fuel System, And Cooling System. Washington, DC: United States Government Printing Office, 22 June 1945.
  • U.S. Department of the Army (25 October 1944). TM 9-768: 45-ton Tank Transporter Truck-trailer M19. Washington, DC: United States Government Printing Office.
  • U.S. Department of the Army. TM55-1031: Engines, Diesel, Hercules: Series DFXB, DFXC, DFXD, and DFXE. Washington, DC: United States Government Printing Office, November 1944.
  • Ware, Pat. The Diamond T Models 980, 981: Britain's second-generation tank transporter. Yalding, Kent: Kelsey Media, 2020.
  • Wendel, C. H. Standard Catalog of Farm Tractors, 1890-1980. Iola, WI: KP Books, 2005.
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