This vehicle features the unarmored cab with two large bottom-hinged glass windows in the front. Mooring ties are mounted at each corner of the hull, and the track grousers that propelled the vehicle in water are obvious. Headlight mounts are on the front slope, and an antenna mount is behind the starboard headlight.
The large pontoon inside the track run provided displacement for flotation; was a mounting point for the road wheels, idler wheel, and track return rollers; and could also be used for stowage. This vehicle has bows for a canvas cover mounted, but the cover itself is absent.
The rear loading ramp allowed a much more protected egress than jumping over the tall sides of the vehicle. The relocation of the engine to behind the cab also increased the size of the cargo compartment from 364 cubic feet (10.3m³) in the LVT2 to 541.3 cubic feet (15.33m³) in the LVT4. (Picture from SNL G-209 Service Parts Catalog for Vehicle, Landing, Tracked, Mk. IV, LVT (4).)
The ramp of this vehicle is lowered. Forward is the engine compartment and the entrances to the driver's and assistant driver's positions. The ramp was operated by a hand winch that, thanks to torsilastic springs, required no more than 15 pounds (6.8kg) of pressure at the handle to operate. Splash deflectors are just behind each track. (Picture from SNL G-209 Service Parts Catalog for Vehicle, Landing, Tracked, Mk. IV, LVT (4).)
The early armored cab is shown here, with the observation hatch in front of the driver and the periscopes in the drivers' roof hatches protected by plastic hemispheres. (Picture from SNL G-209 Service Parts Catalog for Vehicle, Landing, Tracked, Mk. IV, LVT (4).)
This vehicle has the late armored cab, and all five machine guns are mounted. (Picture from TM 9-2800-1/TO 19-75A-89.)
This vehicle is fitted with the final version of the armored cab. The driver and assistant driver are provided with vision blocks, and the bow machine gun mount is in front of the assistant driver. Note that the assistant driver's overhead hatch has a periscope, while the driver's does not.
The applique armor bolted to the front of this LVT4 can be seen. Note the cutout to accommodate the bow towing pintle. The bumper (damaged on this vehicle) also doubled as a bilge pump drainage channel.
This shot details the rear idler sprocket and the track tensioning mechanism. It was necessary to remove the mud guard above the adjusting screw to adjust the track tension. Correct tension was achieved when any gap between the idler bracket and the slide head cap at the end of the screw was closed. Once the gap disappeared, the screw was turned three more notches then clamped securely.
In contrast to the LVT2, the rear road wheel on the LVT4 was fixed to the pontoon.
Details of the front drive sprocket, track skid on the front of the pontoon, and road wheel attachments can be seen here.
The positions of the crew are shown in this diagram. Thirty passengers could be carried in the rear compartment. (Picture from FM 17-34 Amphibious Tank and Tractor Battalions.)