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M917A3

Dump truck

M917A3 dump truck

The M917A3 is the new US Army's heavy dump truck

 
 
Country of origin United States
Entered service Expected in 2020
Configuration 8x8
Cab seating 1 + 1
Dimensions and weight
Weight (curb) ~ 18 t
Payload capacity 24.5 t
Dump capacity 13.76 m
Length ?
Width 2.96 m (?)
Height ?
Mobility
Engine Mack MP8 diesel
Engine power 440 hp
Maximum road speed ~ 100 km/h
Range ~ 1 000 km
Maneuverability
Gradient 60%
Side slope 30%
Vertical step 0.4 - 0.5 m
Trench ~ 0.5 m
Fording 0.5 m

 

   The M917A3 is a US Army's heavy dump truck of 3rd generation. The US Army was looking to enhance the capabilities of their M917A2. The previous M917A2 dump truck was a product of Freightliner, produced since 2001. The M917A3 dump truck is based on a Mack Granite commercial truck. Essentially it is a modified version of commercial design, which uses readily available automotive components. In around 2014 the US Army defined requirements for their new heavy dump truck. The US Army was looking for a modified commercial vehicle in order to keep their servicing and maintenance costs low. Request for proposals was issued in 2017. There were 2 competitors, including Mack Defense and Navistar Defense. In 2018 Mack Defense was awarded a production contract from the US Army for 683 dump trucks. A first batch of 5 pre-production truck was delivered to the US Army in 2019. These initial trucks were used for testing and verification. In 2019 it was planned that additional 6 pre-production trucks with armored cabs will be ordered for delivery in 2020 for blast and ballistic testing. It is planned that full scale production will begin in 2020.

   The M917A3 uses a commercial dump body. It has a payload capacity of 24 500 kg and can carry up to 13.76 m of dump. The dump body can be heated. It comes as standard with a swing gate. The Mack granite dump truck can be fitted with optional material control system which can unload the body in smaller and more precise amounts.

   The M917A3 has a 2-person cab. This dump truck can be fitted with an armored cab. It provides protection for the crew against small arms fire, artillery shell splinters and blasts. The armored cab is fitted with blast resistant seats. The standard cab can be easily replaced by the armored cab. It is field replaceable. So once environment changes the standard cab can be easily replaced by the armored cab. The majority of M917A3 dump trucks delivered to the US Army have standard cabs.

   This military dump truck is powered by a Mack MP8 13-liter turbocharged diesel engine, developing 440 hp. Engine is mated to an Allison automatic transmission. Vehicle has 8x8 configuration. The truck has single tyres. The US Army required that the truck would use the same tyres and wheels on all wheel locations. Vehicle can be fitted with a cold weather kit which allows to start the engine when outside temperature is as low as -40C.

 

Variants

 

   Mack Granite ATC-40T is a military truck with crane. It is based on a similar 8x8 chassis as the dump truck. It was designed to meet a US Army requirement. This vehicle was introduced in 2019. Chassis of the Mack granite can support up to a 60 t capacity crane.

 

 

 
M917A3 dump truck

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M917A3 dump truck

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M917A3 dump truck

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M917A3 dump truck

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M917A3 armored cab

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