English: M1 road wheel replacement. Note: This tank is being "short tracked". This is usually only done when the tracks and/or wheels have been damaged (for instance by an anti tank mine) and no recovery vehicle is nearby. This allows a vehicle with partial running gear to move under its own power. The side skirt armour has been swung aside in order to do so. This armour mostly protects the tracks and wheels (running gear) when it is in place, to prevent smaller anti-tank weapons from disabling the tank. It also decreases the chance of RPGs which hit the tank low on the side from penetrating the interior, as they explode well away from the main side armour creating a spaced armor. You can see a smoke grenade launcher at the top-right of the picture, and also the turret bustle at the top-left which carries small arms ammunition, food, water, bedding, etc. The loader's .30 caliber M-240 machine-gun for anti-personnel fire can be seen mounted on the commander's weapon station in place of the normal M-2 .50 cal machine gun.