Kaelble Z6R3A
The Kaelble Z6R3A was a three-axle all-wheel drive tractor with an output of 200 hp, which was developed by the Kaelble company in 1936 especially for heavy goods transport for the Deutsche Reichsbahn-Gesellschaft (DRG). It was built only one copy of this tractor, predominantly with the Culemeyer - road roller was used. It was also nicknamed "Jumbo".
development
Due to the expansion of the autobahn , the expansion of the railway network, the increasing demand from private companies as well as the possibility of using road scooters heavy and bulky goods can be transported by road, the need for increased heavy transport in 1936 to such an extent that Transports with two tractor units became increasingly difficult because of operational safety and economic reasons. This led the DRG to buy a tractor that was equipped with a larger engine power.
In order to meet the requirements of a powerful and agile heavy-duty tractor, it had to be able to withstand an axle load of seven tons per axle and have the shortest possible center distance. However, since the permissible axle loads and axle spacings were not compatible with the requirements for the tractor according to the StVZO at that time, a design was chosen that received an exemption for vehicles for heavy load transport in accordance with Section 70 (1) of the administrative authority.
This tractor had a center distance of 2900 mm between the front axle and the first rear axle and a distance of 1400 mm between the two rear axles. In order to achieve an even weight distribution, the engine was placed between the two front axles, resulting in a front control arm with all-wheel drive. Since a driven steering axle did not have the same steering radius as a normal steering axle, the last rear axle was also designed to be steerable. The driving axle load of 21 tons was only slightly lower than, for example, that of two coupled Kaelble Z6RLs with 22 tons.
The construction was carried out jointly by the Department of Construction, Purchasing and Operation of Road Vehicles for Railway Cars of the Deutsche Reichsbahn and the Kaelble company in Backnang . At the Kaelble company, the Kaelble Z6R3A was created as a house supplier of tractors to the Deutsche Reichsbahn. This was handed over to the DR fleet on November 11, 1937 and was given the DR number “70071”.
commitment
The "Jumbo" was increasingly used by the Deutsche Reichsbahn for heavy haulage with road scooters . This included, among other things, the transport of transformers or substations, steel girders for bridge construction, paper Yankee cylinders, boiler systems for ships and locomotives, cast parts for presses and of course railway wagons.
The Kaelble Z6R3A was used for the first time to transfer what was then the largest paper Yankee cylinder in the world from Heidenheim an der Brenz to Heilbronn Neckarhafen. This cylinder from Voith had a diameter of five meters and a weight of 65 tons.
There was also a transfer of a ELIN - transformer of 60 tons of Austria's mountain roads; a 24-wheeled R80 road scooter and the Kaelble Z6R2A100 participated.
Data
| Kaelble Z6R3A tractor | |
|---|---|
| Type designation | Z6R3A |
| engine | Water-cooled 6-cylinder in-line four-stroke diesel engine |
| Engine designation | G150s; from 1940 GN150s |
| High performance | 180 hp (132 kW); from 1940: 200 hp (147 kW) |
| Displacement | 23.30 liters |
| transmission | Gmeinder 6-speed gearbox |
| steering | Compressed air-assisted Knorr power steering |
| Top speed | 20 km / h |
| Braking system | Bosch air brake |
| Empty weight | 14 500 kg |
| Perm. total weight | 21,000 kg |
| Dimensions | 7850 × 2480 × 3000 mm |
| drive | 6 × 6 |
| Construction year | 1936 |
| Others | Hitch at the rear, winch with 5 t pulling force; Steel cable 100 m long, sand spreader, central lubrication, pendulum angle, pull-out position lights |
Type code
- Z = tractor
- 6 = number of cylinders
- R = Reichsbahn version
- 3 = number of driven axes
- A = axes
engine
The six-cylinder four-stroke diesel engine with water cooling developed 180 hp at 1200 rpm. It had overhead valves that were controlled by an underlying camshaft via bumper control levers. The displacement was 23.3 liters with 150 mm bore and 220 mm stroke. The speed range ranged from 400 to 1200 revolutions per minute. The engine had an electric starter, had pressure circulation lubrication and was placed above the front and first rear axles, with the radiator behind the engine in the center of the vehicle. The exhaust system was moved upwards behind the driver's cab. In 1940 the G150s engine was revised; after that it was named "GN150s" and made 200 hp at 1200 rpm.
- First engine by 1939: "G150s" with 180 hp
- Second engine from 1940: "GN150s" with 200 HP
Engine code
- G = basic series of the engine
- N = second stage of development
- 150 = bore of the motor in mm
- s = six - number of cylinders in lower case
transmission
The gearbox newly developed by the Gmeinder company was located directly below the driver's cab and had six forward gears for a speed of 1.8 to 20 km / h and one reverse gear for a speed of up to 2 km / h, as well as a LA 120 two-plate clutch Main differential installed between the front and rear axles as well as three side differentials , all lockable with compressed air.
construction
The structure of Kaelble Z6R3A consisted of a forward-control cab with four seats, swing Winkern and extendable running lights. The rear body of the vehicle contained a standing platform on each side of the vehicle and a tool box and a fuel tank on each side. A sandpit was installed above each individual wheel, the sand served to improve the grip of the tires. A ballast box with 6500 kg ballast was placed in the middle above the rear axles; above it was the spare tire box with two wheels.
Other equipment
An automatically working compressed air- controlled Knorr power steering. Bosch air-pressure brake for the front and rear wheels and an air-operated spring-loaded brake for the wheels on the central axle. All six drive wheels and the two spare wheels were pneumatic tires measuring 13.5 × 20 inches. A hand-braked cable winch with a pulling force of 5000 kg and 100 m cable length was mounted on the frame below the driver's cab. At the rear of the tractor there was a spring-loaded hitch .
Color and lettering
After its completion in 1936, the Kaelble Z6R3A was still painted in the old DRG color RAL 20h (green beige, today RAL 1000). "KAELBLE" was written on the front and rear of the vehicle. The rear sides of the vehicle were marked with the lettering "Deutsche Reichsbahn" and the DRG emblem introduced in 1924 , the imperial eagle on a circular yellow background, was affixed to the doors .
The tractor that was delivered in 1937 was then painted in RAL 46 (black-gray, today RAL 7021) and carried the new emblem of the Deutsche Reichsbahn, an imperial eagle standing on a laurel wreath with an enclosed swastika with outspread wings and the letters D and R, for German Empire the front of the vehicle. The lettering "KAELBLE" was now on the doors and the rear of the vehicle, the lettering "Deutsche Reichsbahn" remained on the sides of the vehicle.
The change in the vehicle lettering is based on the fact that the legal form of the Deutsche Reichsbahn had changed in 1937. The Deutsche Reichsbahn became the German State Railroad from the Deutsche Reichsbahn-Gesellschaft (DRG); this was now under imperial sovereignty .
Whereabouts
The whereabouts of the Kaelble Z6R3A tractor after 1945 is unclear, although it was listed in the Deutsche Reichsbahn vehicle inventory in the British occupation zone. You should also have received a new approval number.
annotation
The abbreviation "DRG" used in the text is only used to clarify the era and to avoid confusion between the Deutsche Reichsbahn (1937–1949) and the Deutsche Reichsbahn (1945–1993) of the GDR. The abbreviation “DRG” is only valid for the period 1924–1937.
Literature and Sources
- Johann Culemeyer: The train into the house. Otto Elsner Verlagsgesellschaft, Berlin 1939.
- Johann Culemeyer: The road vehicle for railroad cars. A traffic task and your solutions. DISS. V. February 26, 1934, ELSNER-Verlag, Berlin 1938.
- Erwin Fink: A Swabian company: History and background information from over 100 years of the Kaelble company in Backnang. Ms. Stroh Verlag, 2000.
- J. Wahl, A. Luig: Kaelble. Podszum Verlag, 1999.