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Land Platforms

Mack Defense details new US Army M917A3 Heavy Dump Truck

16 October 2018

Mack Defense has confirmed additional M917A3 Heavy Dump Truck (HDT) technical details to Jane’s after showing the type publicly for the first time at the Association of the United States Army’s annual conference in October.

Following a solicitation released on 26 May 2017 and a subsequent competition between Mack Defense and Navistar Defense, on 29 May 2018 the US Army announced that it had awarded the HDT contract to Mack Defense. The initial market survey for this requirement had been released by the US Army in 2014.Mack Defense's M917A3 Heavy Dump Truck (HDT). (Shaun Connors)Mack Defense's M917A3 Heavy Dump Truck (HDT). (Shaun Connors)

The M917 is a member of the M900 series of trucks. The M900 series are based on commercial vehicles with the minimum of modifications to make them suitable for military use, and as such are not classed tactical trucks by the US Army. In addition to the M917, the M900 series includes the M915 6×4 and M916 6×6 tractor trucks, and has previously included M918 6×6 bituminous distributor, M919 8x6 concrete mixer, and M920 8×6 tractor truck.

Mack’s winning M917 HDT bid is based on the company’s Granite axle-forward construction grade chassis. A key differentiator between the commercial offering and the HDT is the latter requiring a force protection capability. To meet this requirement Mack offered a swap-cab solution. The drop-in armoured cab, designed by Tencate, will be manufactured by JWF Defense Systems and fitted with Jankel BLASTech seating. The gap between the dump body and cab is primarily to retain a weight balance and axle loads with the armoured cab fitted. The 18 yd³ (13.76 m³) heated steel dump body is manufactured by Crysteel Manufacturing Inc.

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