Light Recovery Vehicle M5781-4

M578: General
Manufacturers
  • FMC Corp.
  • Bowen-McLaughlin-York
Crew
3 men:
  • Crane operator in cab right front
  • Rigger in cab left front
  • Driver in hull left front
M578: Dimensions
Combat weight 54,000lbs
24,000kg
Height over MG with crane in travel position 130.5"
331.5cm
Length without crane 219.8"
558.3cm
Crane overhang forward in travel position 30.5"
77.5cm
Width 124.0"
315.0cm
Tread 106.0"
269.2cm
Ground clearance 17.4"
44.2cm
Ground pressure, zero penetration 10.1psi
.709kg/cm²
M578: Armament
Type Mount Ammunition Traverse Elevation
.50cal M2HB MG Flexible in AA mount on rigger's cupola 500 rounds 360°
(3manual)
Manual
M578: Armor
Assembly
Welding
Hull
Rolled homogeneous steel
Location Thickness Angle from vertical
Front .5"
1.3cm
Driver's compartment sides and rear .5"
1.3cm
Driver's compartment top .5"
1.3cm
90°
Cab
Rolled homogeneous steel
Location Thickness Angle from vertical
Front .5"
1.3cm
20°
Sides .5"
1.3cm
Rear .5"
1.3cm
Top .5"
1.3cm
90°
M578: Automotive
Engine General Motors 8V71T; 8 cylinder, 2 cycle, vee, supercharged diesel
Horsepower Net: 345@2300rpm
Gross: 405@2300rpm
Torque Net: 895 ft-lb@1600rpm
Gross: 980 ft-lb@1700rpm
Fuel capacity 300gal
1100L
Transmission Allison XTG-411-2A, 4 ranges forward, 2 reverse
Steering Mechanical, steering bar (clutch-brake in 1st, 2nd, 1st reverse; geared steer in 3rd, 4th, 2nd reverse)
Brakes Multiple disc
M578: Suspension
Type Road wheels Track return rollers
Torsion bar 5 individually sprung dual/track Flat track
Drive sprockets Idlers Shock absorbers
11-tooth front drive Rear road wheels serve as adjustable trailing idlers All road wheels fitted with hydraulic lock-out cylinders which serve as shock absorbers when vehicle is moving
M578: Track
T132
Center guide, single pin, steel with detachable rubber pad
Width 18"
46cm
Pitch 6"
15cm
Shoes/track Left side: 75
Right side: 76
Ground contact length 148"
376cm
M578: Performance
Max level road speed 37mph
60kph
Max trench 84"
210cm
Max grade 60% Max sideslope 30%
Max vertical obstacle 40"
100cm
Min turning diameter Pivot
Max fording depth 42"
110cm
Cruising range ~450mi, roads
~720km, roads

M578 was based on the hull of the M107 175mm self-propelled gun and M110 8" self-propelled howitzer. The hydraulic lock-out cylinders in the suspension lent themselves well to recovery work as well as providing a stable firing platform for the artillery pieces. A rear-mounted spade provided further stabilization during recovery operations. An armored cab fitted with a crane boom was placed at the rear of the hull, replacing the ordnance found on the M107 and M110. The cab could rotate 360°, and a 30,000lb (14,000kg) capacity winch with 220' (67m) of .625" (1.59cm) wire rope was run through a boom on the cab. Another winch, 60,000lb (27,000kg) capacity with 230' (70m) of 1" (2.5cm) wire rope, was mounted on the front of the cab. Access to the cab was through a door on each side and by double doors in the rear, and the crane operator and rigger both had vision cupolas in the cab roof.

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References

  1. Hunnicutt, R.P. Sheridan: A History of the American Light Tank, volume 2. Navato, CA: Presidio Press, 1995. Reprinted with permission from Sheridan, R.P. Hunnicutt ©1995, available from Presidio Press, 505B San Martin Drive, Suite 160, Navato, CA 94945.
  2. TM 9-2350-238-10 Operator's Manual for Recovery Vehicle, Full-tracked: Light, Armored, M578. Washington, DC: Dept. of the Army, 27 Apr 1990.
  3. Crismon, Fred W. U.S. Military Tracked Vehicles. Osceola, WI: Motorbooks International, 1992.
  4. Federation of American Scientists. "M578 Recovery Vehicle." DOD 101. 12 Sep 1998. 22 Apr 2001 <http://www.fas.org/man/dod-101/sys/land/m578.htm>. DOD 101

Last updated 24 Aug 2016.
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© Copyright 2001-16 Chris Conners