So in real world conditions if they , i mean the tank crew of 3 ( if this tank has autoloader ) , had to face this situation behind the frontline ( safe zone ) then still the will need extra hands ( much like another 3 minimum , 5 optimum ) which will arrive with armored recovery vehicle . If this situation happens at frontline or inside enemy territory than forget the tank . Abandon it while also some way disable the tank ( like taking away electronic equipment FCS hopefully or damaging them ) .