The door in the rear ramp of the M84 was relocated from the more central position found in the armored personnel carrier M59 on which it is based. Towing cables were stowed on the rear ramp, and the large mortar baseplate assembly was kept on the rear ramp opposite the door. The mortar rotator assembly was stowed on the vehicle's right rear fender, below the shovel.
The 4.2" mortar M30 can be see through the rear door. It was situated in the vehicle facing the rear, and the roof hatches could be folded on top of each other to the front of the vehicle so allow firing from the vehicle.
The central roof hatches in the M84 were modified from those found in the M59, and the new three-piece roof hatch is shown here. A torsion spring was mounted between the front and middle hatches, and small doors were placed in the front and rear hatches. The rear and center hatches were folded onto the front hatch to provide an opening through which to fire the mortar. This vehicle is armed with the M12 machine gun cupola, and on each side of the vehicle a front intake grille and rear exhaust grille can be seen for the engines. Snorkels for the grilles are stowed in the boxes on top of them, and the armored guard for the radiator filler caps are visible between the intake and exhaust griles. An antenna aperture and guard is directly in front of the right-hand intake grille. (Photo by Richard S. Eshleman.)