40mm Gun Motor Carriage M341-3

M34: General
Date of first acceptance 1951 Total acceptances 104
Manufacturer Tokyo Ordnance Depot
M34: Dimensions
Length with roller 236.5"
600.7cm		 Gun overhang forward 0"
Front tread 64.5"
164cm		 Rear tread 63.8"
162cm
Wheelbase 135.5"
344.2cm
M134: Armament
Type Mount Traverse Elevation
Automatic 40mm Gun Behind cab 360°
(manual)		 Manual
M34: Armor
Assembly
Bolting
Hull
Rolled face-hardened steel
Location Thickness Angle from vertical
Radiator louvres .25"
.64cm		 26°
Windshield cover .50"
1.3cm		 25°
Sides .25"
.64cm		 0°
Rear .25"
.64cm		 0°
Hood top .25"
.64cm		 83°
M34: Automotive
Engine White 160AX; 6 cylinder, 4 cycle, in-line gasoline
Horsepower Net: 147@3,000rpm Torque Net: 325 ft-lb@1,200rpm Fuel capacity 60gal
230L
Transmission Spicer 3461 constant mesh, 4 speeds forward, 1 reverse
Steering Steering wheel
M34: Suspension
Type Road wheels Track return rollers
Front: Semi-elliptic longitudinal leaf spring
Rear: Vertical volute spring		 Front: Steel ventilated disc
Rear: 1 bogie/track;
4 dual/bogie		 1 dual/track
Drive sprockets Idlers Shock absorbers
18-tooth front drive Spring-loaded at rear of track On front wheels
M34: Track
T68E1
Center guide band type
Width 12"
30cm		 Pitch 4"
10cm		 Pitches/track 58 Track ground contact length 46.75"
118.7cm
M34: Performance
Min turning diameter 59'
18m

Supplies of 37mm ammunition for the gun found in the CGMC M15A1 dwindled during the early portion of the Korean War, so a number of these half-tracks were modified by replacing the entire gun mount M54 by a mount for an automatic 40mm gun. No armor was provided for the gun crew, in contrast to the original vehicles.

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References

  1. Hunnicutt, R.P. Half-Track: A History of American Semi-tracked Vehicles. Navato, CA: Presidio Press, 2001. Reprinted from Half-Track, R.P. Hunnicutt ©2001, available from Presidio Press, 505B San Martin Drive, Suite 160, Navato, CA 94945.
  2. Doyle, David. U.S. Half-tracks: The Development and Deployment of the U.S. Army's Half-track Based Multiple Gun Motor Carriages and Gun Motor Carriages, Part two. Ed. Pat Stansell. Delray Beach, FL: The Ampersand Publishing Group, Inc., 2016.
  3. Track Data. Warren, MI: Track & Suspension Laboratory, Components Research and Development Laboratories, Research & Engineering Directorate, US Army Tank-Automotive Center, 23 June 1965.
Last updated 15 Nov 2016.
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