Unimog 404

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Mercedes Benz
8/8 tank tender on a Unimog 404.1 chassis
8/8 tank tender on a Unimog 404.1 chassis
Unimog 404
Manufacturer: Daimler-Benz AG
Sales designation: 404.1: U82
404.0: U110
Production period: 1955-1980
Previous model: none
Successor: Unimog 435
Technical specifications
Designs: Short-nosed
Engines: Petrol engines:
M 180
M 130
Diesel engines:
OM 615
Power: M 180: 60 kW
M 130: 81 kW
OM 615: 44 kW

The Unimog 404 , also known as the Unimog S and Unimog 404 S , is a vehicle in the Unimog series from Mercedes-Benz . It was built by Daimler-Benz at the Mercedes-Benz factory in Gaggenau from 1955 to 1980 . Two types were created, the 404.1 and the 404.0, with a total of ten models, which were marketed as the Unimog U82 and Unimog U110 . A total of 64,242 vehicles were built, making the Unimog 404 the most popular Unimog series. In addition, it is considered the most popular Unimog. In contrast to the Unimog 401 , the Unimog 404 is more of a small off-road 1.5-ton truck than an agricultural vehicle. It was often used as a chassis for fire engines and military vehicles; the Bundeswehr alone procured 36,638 units.

History and Development

After the Second World War , French troops were stationed in parts of what would later become the state of Baden-Württemberg . In 1951 and 1952, 450 Unimog vehicles were ordered from Daimler-Benz for the troops stationed in Germany, which were delivered in 1952 and 1953 in the form of the 2010 and 401 series. Independently of this, French officers observed the Unimog tests in 1952 at the “Sauberg” test site near Gaggenau. They approached the test drivers and designers because they were interested in the Unimog as a military vehicle. Initially, information was passed on orally until a specification sheet was drawn up. It was determined that the vehicle should be similar to the Unimog 2010 , but should be wider and with a longer wheelbase. The speed was projected to be 80 to 90 km / h. The Unimog should be designed for a payload of 1.5 to 2 tons or ten to twelve soldiers. Because France is a member of NATO, a gasoline engine was planned. Daimler-Benz opted for the M 180 gasoline engine with a displacement of 2.2 liters and an output of initially 85 hp (62.5 kW). Later the M 130 and the diesel engine OM 615 were also installed in some vehicles.

In the summer of 1953, the first prototype with the designation MU 80/0 was built, it has a flat U-profile ladder frame with the dimensions 4100 mm × 770 mm, a wheelbase of 2220 mm and a track width of 1620 mm. The cab is angular and does not look like the later production model. Initially, the M 180 gasoline engine was installed. The vehicle was later converted by Total for the Frankfurt Airport Fire Brigade and received the OM 615 diesel engine . It is preserved in a museum in Upper Lusatia. Another prototype followed in early 1954, it has a radiator grille with a finer perforated grille and a wheelbase of 2350 mm. Since the French military did not want the spare wheel to be mounted on the loading area where there would be space for soldiers, the Daimler-Benz engineers built a cranked frame for the third prototype of the Unimog 404 made in mid-1954 so that the spare wheel was below the Loading area could be mounted. The cranked frame also has better torsion properties, which improves the terrain properties of the Unimog. This design feature was later adopted for the following Unimog models. Two prototypes were delivered to the French military.

The first prototype test vehicle of the pre-series was built in autumn 1954. It had smaller dimensions than the later production vehicle. The wheelbase was 2670 mm and the track was 1620 mm, the U-profile frame was 4450 mm long with a frame width of 770 mm. The cab was already different from the prototype MU 80/0. From May 1955 to January 1956 the initial series was built, which essentially corresponds to the pre-series. A total of 578 copies of the initial series were made. January 1956 finally began the main series production of the 404.1 . The frame has a U-profile with 160 mm × 60 mm, a length of 4700 mm, a width of 770 mm; the wheelbase is 2900 mm, the track width 1620 mm. The first 1100 pre-production and initial series vehicles were accepted by the French military.

The Unimog 404.0 has the same cab as the Unimog 406 . This can be seen from the external wheel hubs, which Unimogs based on the 406 series do not have.
Unimog 404 with diesel engine

Model overview

Model of the Unimog 404
Model 404 type Production period Cab Wheelbase (mm) Motor power (kW) Engine type Quantities Remarks
404.010 404.0 Folding top 2900 81 M 130 113 Cab of the Unimog 416, some vehicles also with M 180, 60 kW
404.011 404.0 All steel 2900 81 M 130 1151 Cab of the Unimog 406
404.012 404.0 Folding top 2900 81 M 130 7th Cab of the Unimog 416
404.013 404.0 All steel 2900 81 M 130 520 Cab of the Unimog 406
404.111 404.1 1955-1956 Folding top 2670 63 M 180 1210 578 of them in the initial series, some vehicles also with 59 and 60 kW.
404.112 404.1 Folding top, all steel 2900 60 M 180 185
404.113 404.1 Folding top, all steel 2900 60 M 180 8106 Some vehicles also with 68 or 81 kW
404.114 404.1 1956-1980 Folding top, torso, coupling cabin 2900 60 M 180 50321 Some vehicles also with 68 kW
404.115 404.1 All steel 2900 60 M 180 2548 Some vehicles also with 68 kW
404.117 404.1 1969-1970 Folding top 2900 44 OM 615 81 Model for the Portuguese market with a diesel engine

technology

The Unimog 404.1 Cabrio lacks the side windows.
Chassis of the Unimog 404 with an offset frame. It allows a particularly large axle articulation.

The Unimog 404 is a small four-wheeled all-terrain truck with a short-hood design that is designed for a payload of 1500 kg. It is the first Unimog with a cranked ladder frame. He has also thrust tube-guided portal axles with speed reduction gearbox and coil springs with hydraulic telescopic shock absorbers front and rear axle. All four wheels and tires are the same size. The vehicle is equipped with hydraulically operated ATE drum brakes as standard . The 404 is rear-wheel drive , the front-wheel drive can be activated , as can a differential lock.

A water-cooled M 180 gasoline engine with a displacement of 2195 cm³ powers the 404.1. Several models of this engine for the Unimog 404 have been documented, with outputs of 80, 82, 85 and 92 DIN PS (59, 60, 63, 68 kW). It is equipped with a ground carburetor type Zenith 32 NDIX equipped and transfers the drive force via a single dry type Fichtel & Sachs K Z 16 to a fully synchronized Daimler-Benz six-speed transmission of the type UG 1/11. You can drive backwards in the first two gears. The vehicles of the initial series, however, did not have a synchronized gearbox. A flanged power take-off for a PTO was available for the transmission.

The 404 is available both with a closed two-door cabin and as a two-door convertible vehicle with a removable hood. The windshield of the 404.1 is split, while the 404.0, which has the cab of the 406, has a full-length windshield. Only the models with a closed cab have side windows. Special vehicles on Unimog 404 chassis, such as B. Fire engines, were partly built as four-door.

Unimog 404.113 with four-door cab.

Technical specifications

Model 404.111 404.1xx 404.0xx 404.117
designation U82 (initial series) U82 (main series) U110 U60
Production period 1955-1956 1956-1980 1971-1980 1969-1970
Mass (approx.) 2900 kg 2970 kg 2970 kg
length 4600 mm 4925 mm 5025 mm
width 2130 mm 2140 mm 2130 mm
height 2190 mm 2190 mm 2250 mm
wheelbase 2670 mm 2900 mm
Gauge 1620 mm
Ground clearance 400 mm
Loading area length 2700 mm 3000 mm
Loading area width 2000 mm
Drop side height 500 mm
Fuel tank volume 2 × 60 l
tires 10-20 10.5-20
Engine model M 180 / II U M 130 OM 615.912
design type Water-cooled in-line six-cylinder petrol engine Water-cooled in-line four-cylinder diesel engine
Fuel system Off-road carburetor type Zenith 32 NDIX Pre-chamber injection
Displacement 2195 cc 2778 cc 2197 cc
Bore × stroke 80 mm x 72.8 mm 86.5 mm × 78.8 mm 87 mm x 92.4 mm
Compression ratio 7: 1
Nominal power (DIN 70020) 85 hp (63 kW) 80-82 HP (59-60 kW) at 4850 min -1 110 hp (81 kW) at 4800 min -1 60 HP (44 kW) at 4200 min -1
Maximum torque (DIN 70020) 16.1 kp m (158 N m) at 3200 min −1 12.8 kgf · m (126 N · m) at 2400 min -1
transmission Unsynchronized six-speed gearbox Fully synchronized six-speed transmission
Top speed 6th gear: 95 km / h 1st gear: 7 km / h
2nd gear: 13 km / h
3rd gear: 24 km / h
4th gear: 44 km / h
5th gear: 72 km / h
6th gear: 95 km / h
1st gear Reverse gear: 6 km / h
2nd reverse gear: 10 km / h
6th gear: 100 km / h
Climbing ability 1st gear: 70%
2nd gear: 45%
3rd gear: 23%
4th gear: 11.5%
5th gear: 6.5%
6th gear: 3.5%
source

literature

Individual evidence

  1. ^ Daimler: Unimog History 1974 . Accessed May 17, 2017
  2. Unimog Community: Unimog U 404 S [1955 to 1980] . Retrieved May 17, 2017.
  3. a b Vogler, p. 41
  4. ^ Schneider: Unimog: All types, all models, all data since 1946 , p. 21
  5. ^ Colin Peck: Mercedes-Benz Trucks . Veloce, Dorchester 2014, ISBN 978-1-84584-643-5 , p. 52. (English)
  6. Vogler, p. 51
  7. Vogler, p. 53
  8. a b c Vogler, p. 43
  9. a b c d Vogler, p. 47
  10. a b c d Vogler, p. 42
  11. Vogler, p. 55
  12. Carl-Heinz Vogler: UNIMOG 406 - Type history and technology. Geramond, Munich 2016, ISBN 978-3-86245-576-8 , p. 45.
  13. a b Andreas F. Schulze: 55 years Unimog 404 S . May 10, 2010, accessed May 17, 2017.
  14. a b Vogler, p. 54
  15. Daimler AG: Type 404.010
  16. a b c d Vogler, p. 46
  17. Daimler AG: Type 404.011
  18. Daimler AG: Type 404.012
  19. Daimler AG: Type 404.013
  20. Daimler AG: Type 404.111
  21. Daimler AG: Type 404.112
  22. Daimler AG: Model 404.113
  23. a b c Vogler, p. 48
  24. Daimler AG: Type 404.114
  25. Daimler AG: Type 404.115
  26. Daimler AG: Model 404.117
  27. Vogler, p. 50
  28. Vogler, p. 52
  29. a b c d e f g h i Unimog 404 Gebruikershandleiding. Pp. 3-5.
  30. a b Vogler, p. 49
  31. Vogler, p. 44
  32. ^ Peter Kautz: Mercedes-Benz Unimog S / 404 / 404S. Retrieved May 17, 2017.

Web links

Commons : Unimog 404  - collection of images, videos and audio files