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German Army Wehrmacht Sd.Kfz 10 Semitrack

The following technical information about the Sd.Kfz 10 Semitrack has been provided by Dr. Thomas Hott.

There exist two different types of Sd. Kfz. 10. One is type D6 built between 1937 and 1939 and a later type D7 built between 1939 and 1944. There are only two differences: 1) the engine, and 2) the fuel tank size. All other specifications are equal. The Zugmaschine illustrated on this page (from Dr. Hott) is of type D7.

Leichter Zugkraftwagen 1 to (Sd. Kfz. 10) Type D7 (DEMAG) 1939-1944

A) Engine

  • Engine Type: Maybach HL 42 TRKM
  • Pistons: 6
  • Bore and stroke: 90 x 110 mm
  • Displacement: 4170 ccm
  • Power: 100 hp at 3000 RPM
  • Compression: 1:6.6
  • Carburetor: 1 Off-Road Two-Step Type: Solex 40 IFF II
  • Valves: tilted hanging, camshaft inside cylinder head, spur gear driven
  • No. of crankshaft bearings: 8
  • Cooling: exchangeable cylinder case, water + pump
  • Battery: 12V, 75 AH
  • Generator: 130 W
  • Starter: 1.8 hp

B) Transmission

Transmission is connected to chain drive, two-disc dry clutch, semiautomatic gearbox Type: Maybach Variorex SRG 102128 H, with gear preselection and automatic change when pressing the clutch pedal, 7 forward gears, 3 reverse gears

Transmission Gear Ratios:

  1. 8.20
  2. 5.40
  3. 3.53
  4. 2.28
  5. 1.49
  6. 1.02
  7. 1.00

C) Chassis

  • Self supporting steel tub
  • Front Wheel Suspension: 1 axle with one leafspring (perpendicular to driving direction)
  • Chain Drive: 2 Chains each consisting of 41 chain links with rubber pads
  • Steering: connected to wheels + hydraulic connected to chain brakes
  • Foot Brakes: Hydraulic, connected to chain driving wheels
  • Hand Brakes: connected to chain driving wheels

D) General Data

  • Length of track: 6560 mm
  • Track length on ground: 1360 mm
  • Frontwheel axle width: 1630 mm
  • Track axle width: 1580 mm
  • Chain Width: 240 mm
  • Dimensions: L: 4750 mm, W: 1930 mm, H: 1620 mm
  • H with folding top: 2000 mm
  • Front tires: 6.00 x 20 Off-Road
  • Ground clearance: 325 mm
  • Fording depth: 700 mm
  • Turning diameter: 10 m
  • Unloaded weight: 3400 kg
  • Max. gross weight: 4900 kg
  • Payload: 1500 kg
  • Towing Weight: 1000 kg (Off-Road)
  • Max. Speed: 65 kph
  • Fuel Consumption: 38 l/km On-Road, 67 l/km Off-Road
  • Fuel Tank Size: 115 liters (below drivers seat)
  • Range: On-Road: 300 km, Off-Road 170 km
  • Crew: 8 persons

Here the differences in the tabulated specifications for the early Zugmaschine type D6:

Leichter Zugkraftwagen 1 to (Sd. Kfz. 10) Type D6 (DEMAG) 1937-1939

A) Engine

  • Engine Type: Maybach NL 38 TRKM
  • Displacement: 3790 ccm
  • Power: 90 hp at 2800 RPM

B) General Data

  • Fuel Tank Size: 115 liters (below drivers seat)
  • Range: On-Road: 300 km, Off-Road 170 km

Demag D7, Sd.Kfz.10 Photo: Courtesy of Richard Notton
Demag D7, Sd.Kfz.10 Photo: Courtesy of Richard Notton.

Zugmaschine (1t)=Sdkfz 10. Photo: Courtesy of Dr. Thomas Hott
Zugmaschine (1t)=Sdkfz 10. Photo: Courtesy of Dr. Thomas Hott.

Demag D7, Sd.Kfz.10. Photo: Courtesy of Richard Notton
Demag D7, Sd.Kfz.10. Photo: Courtesy of Richard Notton.