| M1224: General | |||
| Date of first acceptance | 2007 | ||
| Manufacturer | Navistar Defense | Crew |
|
| M1224: Dimensions | |||
| Combat weight | 37,850lbs 17,170kg |
Height | 120" 305cm |
| Length | 254" 645cm |
Width | 102" 259cm |
| Wheelbase | 153" 389cm |
Ground clearance | 10.9" 27.7cm |
| M1224: Armament | |||
| Type | Mount | Traverse | Elevation |
| .50cal M2HB MG --OR-- 7.62mm M240B MG --OR-- 40mm Automatic Grenade Launcher Mk19 MOD3 |
Turret | 360° |
Manual |
| Night vision | |||
| AN/VAS-5 thermal for driver | |||
| M1224: Armor |
| Assembly |
| Bolting |
| M1224: Automotive | |||||
| Engine | MaxxForce D8.7I6; 6 cylinder, 4 cycle, in-line, turbocharged diesel | ||||
| Horsepower | 330@2,100rpm | Torque | 950 ft-lb@1,250rpm | Fuel capacity | 57gal 216L |
| Transmission | Allison 3000, 5 speeds forward, 1 reverse | ||||
| Steering | Hydraulically-assisted recirculating ball, steering wheel | ||||
| Brakes | Air-operated S-camshaft drum with anti-lock system and traction control | ||||
| M1224: Suspension | ||
| Type | Road wheels | Shock absorbers |
| Semi-elliptic leaf spring | 2/side | On each front wheel |
| M1224: Performance | |||
| Max level road speed | 69.2mph 111kph |
Max grade | 60% |
| Max sideslope | 30% | Min turning diameter | 62' 19m |
| Max fording depth | 36" 91cm |
||
The 4x4 M1224 MaxxPro (Maximum Protection) was a Category I mine resistant ambush protected vehicle (MRAP). Category I MRAPs, which are mine resistant utility vehicles (MRUVs), were intended to be fireteam-sized vehicles capable of carrying a crew of three and three passengers. The MaxxPro was designed to use the Workstar 7000 truck chassis fitted with a V-shaped armored crew capsule designed with help from Plasan Sasa of Israel. An 18,000lb (8,200kg) winch was mounted on the front with 70' (21m) of 0.625" (1.59cm) cable. A 2-speed transfer case provided a low range for severe conditions; the vehicle was required to be halted to engage four-wheel drive or to change the transfer case from high to low range.
Thanks to increased prevalence of improvised explosive devices using explosively-formed penetrators, the MRAP Expedient Armor Program (MEAP) was developed to add standoff applique armor to the vehicles. This kit increased the weight by 4,500lbs (2,040kg), the width by 5" (13cm), and raised the center of gravity by 2.2" (5.6cm). Vehicles fitted with the MEAP kit were designated M1224A1. It was recommended that the vehicle's speed be kept at 55mph (89kph) or below on paved roads due to handling issues; and 35mph (56kph) on smooth secondary road surfaces and 10mph (16kph) cross-country or on rough secondary road surfaces due to the the possibility of suspension damage. Likewise the vehicle was restricted from climbing a grade of more than 50% and parking on a grade of over 20%. The doors of the M1224 featured a pneumatic system to assist with opening, but it was necessary to upgrade this to a linear 24-volt electric ball screw-type actuator on the M1224A1. With this, the driver and passenger doors could self-open on 30% grades or sideslopes.
