This M114 illustrates how a fully-armed vehicle would appear. Although amphibious, the small angle of approach served to limit the vehicle's ability to climb out of streams or up steep banks. The commander was armed with a .50cal machine gun, and a 7.62mm MG was positioned at the right rear by the observer's hatch.
This picture gives a better view of the M114's band type tracks. The driver's hatch is open, and is visible resting on the front hull plate. The trim vane only reaches halfway up the hull front, and its outline can be seen in front of the headlight guards.
The positioning of the open driver's hatch and trim vane can better be seen on this machine.
The diminutive size of the M114 is shown well here with it parked next to a relatively hulking fire support team vehicle M981.
Details of the drive sprocket are shown here.
The driver's position is shown here, ringed by his M26 periscopes, and the commander's cupola is directly behind. To the driver's right is the engine air inlet and exhaust grille. The filler cover to the driver's front left is for fuel, and the catch for the driver's hatch when it was open can be seen on the front slope below the forward periscope.
The engine is visible through the open grille in this image.
The M114 featured a round rear entry door, and it is open on this vehicle. Visible on the door interior are the mounting points for three M72 light antitank weapons.
Stowage is in place on this vehicle, including the antitank rockets on the rear door. The observer's and commander's hatches are open, and the periscope in the observer's hatch can be seen. The mushroom-shaped structure on the left rear corner of the roof is an air vent.
Looking through the open hatch, the stations for the crewmen are visible. The observer was positioned in the right rear of the vehicle; his hatch is obvious in the roof, and his seat faces inward on the floor. The folded passenger jump seat is visible across from the observer's spot. The commander's cupola is in the center of the vehicle's roof, and the driver sat in the front left of the M114. The vehicle's engine compartment is to the driver's right, and a radio would normally be placed on the shelf just to the commander's left. Guards for the suspending torsion bars can be seen running across the floor.
The observer's position is detailed here. His seat is folded up on this vehicle, and a radio is mounted behind him.
The observer's hatch was provided with a periscope mount, and the location of a dome light can be seen on the roof in the center of the entryway.
The passenger seat is show here. The mounting point of the rear idler wheel can be seen immediately to the passenger's right, and the vertical support for the commander's seat overlaps the torsion bar guard on the floor.
This interior of the commander's cupola is illustrated in this image. The dark control box on the roof was for the vehicle's intercom system.
The driver's position is visible in this view. To his immediate right is the engine. The steering bar is obvious, as is the positioning of his M26 viewing periscopes. An infrared periscope M19 could be installed in his hatch for night operations. The switch just above the right arm of the steering bar is for dimming the headlights, and the large round structure in front of the driver is the engine's air cleaner.
A closer view of the driver's position is presented here. His seatback is folded forward, allowing us to view the large holed accelerator pedal. The black knob to the right of the accelerator pedal is the parking brake lock. The brake pedal, hidden by the driver's seat, is at the end of the lever to the left of the accelerator, and to the left of the brake is a foot rest. The panel above the foot rest housed the round white accessory outlet receptacle, and below this is the larger black auxiliary power receptacle. The transmission shift lever is visible to the right of the steering bar. The stowage box for the M19 infrared periscope is nicely labeled, and the driver's switch panel is just ahead of the periscope box.
The powertrain of the vehicle is sketched here (though not to scale), with the engine, transmission, and steering gear shown from the left to right. (Pictures from TM 9-2350-244-24P.)
This vehicle sports some modifications related to testing it underwent as a robotic fighting vehicle, but it allows us to see the M26 cupola fitted to the M114A1. The smoke grenade launchers on the hull and the cameras located on the front hull and the machine gun mount would not be expected on a service vehicle. The modifications were performed by Charles S. Spalding and personnel from the Army Armor and Engineer Board.
The machine gun on this vehicle is a replica, but its position and ammunition tray can be seen. The cupola travel lock points the weapon off to the vehicle's right to allow the driver access to his hatch.
Further details of the machine gun mount can be seen here.
The handle and guard for the fire extinguisher have been painted red. The hinge mechanism for the driver's hatch is at the left of the image.
The cupola and spring for the cupola door were mounted on the rear, and the observer's hatch and support can be seen in the foreground.
The 20mm gun makes a striking contrast to the machine guns on the vehicles above. The black cylinder on the gun mount in front of the commander of the near vehicle is an AN/TVS-2 passive night sight. (Picture taken 1 Sep 1975; available from the National Archives.)