The engine is seen from the left front in this picture. (Picture from TM 9-731A Medium Tanks M4 and M4A1.) Home Vehicle list Top The engine had a 5.7:1 compression ratio and its cylinders had a bore of 5.00" (12.7cm) and stroke of 5.50" (14.0cm), for a displacement of 973in³ (15,900cm³).
M4 SHERMAN COMMANDER SPLIT HATCH GENERATOR
Later engines can be readily recognized by the generator being driven by the propeller shaft or transmission, and consequently not being mounted on the engine's accessory case. The rear of an early R975 C1 engine is shown here. The shorter vertical hose connects the fuel pump to the carburetor. The squat, cylindrical fuel pump is visible near the center of the rear hull opening, and has two hoses attached to it.
The air inlet hoses can be seen angling down diagonally from the air cleaners toward the vehicle's center, and the black boxlike carburetor sits between them. The very bottom of the hull between the tracks is angled down as opposed to being rounded, indicating this tank was manufactured by Pressed Steel Car Company. The square muffler tailpipes are visible protruding from under the armor plate. The twin engine access doors are open in this picture, and the hole in the rear armor above the engine was for insertion of the engine's hand crank. The rear hull plate has a shallow horseshoe shape, and the engine's air cleaners are visible at the top corners. This rear view of an M4A1 illustrates differentiation points it shares with the M4. Note the orientation of the shovel on the left side of the hull. Stowage on the rear armor plate included the large idler adjusting wrench and the hand crank for the engine. This angle also allows us to see the splash guard that protected the turret ring as well as the main engine and auxiliary generator engine fuel fillers, which can be seen near the turret in the foreground and background, respectively. A pistol port was provided in the turret at the loader's station, and a lifting eye is above and behind the pistol port. The engine air inlet cover and its protective armor splash guard are near the turret, and the hinges for the solid rear deck engine access door are just to the rear of the air inlet cover. Home Vehicle list TopĪ view of the rear deck and turret is shown here. This contrasts with welded hull tanks below, which have a separate antenna base.
M4 SHERMAN COMMANDER SPLIT HATCH DRIVER
When used as a command tank and with a second radio installed, the ventilator next to the assistant driver was used for the radio's antenna. The two small cylinders attached to the headlight brush guards held plugs used to seal the headlight socket hole when the light assemblies were removed. This would help roughly line the turret up with a target.
The guard on the hull front in front of the driver was to protect the siren when it was mounted, and the vertical vane sight is visible on the turret roof in front of the commander's position. It has the single-piece final drive and differential housing and the combination gun mount M34A1 but retains the drivers' direct vision slots. This tank presents an interesting mix of early and late production features. Medium Tank M4A1 Sherman at the Americans in Wartime Museum.
The latter was replaced by a simple periscope very early in the production run due to its propensity to become damaged and allow entry of bullet splash. It features the M34 gun mount, three-piece final drive and differential cover, direct vision slots for the drivers, and the rotor sight for the gunner. Medium Tank M4 Sherman Medium Tank M4A1 Sherman.ĭetails of the front of the early M4A1 are shown in this image.
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