Kettenkrad - Motocicleta Tractor Alemana

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Kettenkrad - Motocicleta Tractor Alemana

Notapor m606paz » 18 Abr 2009, 12:02

Les dejo buena Info.

GERMAN MOTORCYCLE TRACTOR

The invasion of Crete revealed for the first time the use by the Germans of the motorcycle tractor for the purpose of hauling light, single-axle, open trailers or light guns. This tractor is known to be employed in the Middle East and, according to recent newspaper accounts, it is now to be seen on the Eastern Front. It is a suitable vehicle for accompanying airborne troops. Early in 1941, it was accepted as an army vehicle and received the number Sd.Kfz. 2 (Sonder Kraftfahrzug--special motor vehicle).

a. Body

The accompanying sketches show that the body (1) is a box-like structure made of pressed metal in two halves, and joined along a horizontal plane below the track-guards (2). It contains the driving position (3), the engine (4) and transmission, and a transverse seat (5) at the rear over the cooling system (6). The driver is seated on a saddle (7) mounted above the gearbox (8) and clutch housing (9), and has two rubber knee-pads fitted beneath the dashboard. On each side, the track-guards carry gasoline tanks (10) at the front while, level with the engine, the sides are built up (11) and contain on the left the tool kit and on the right the battery and fuze panel.

Imagen

Imagen

At each side of the passenger seat there is a light rail (12), while foot rests, rifle rests (14), and clips (15) are provided at the rear.

b. Engine

The power unit (4) is an Opel "Olympia model 38," gasoline engine, mounted towards the rear of the body. It is a four-cycle, four-cylinder unit developing about 36 brake horse power at 3,400 rpm.

Bore 80 mm
Stroke 76 mm
Engine capacity 1,478 cc
Compression ratio 6
Firing order 1 - 3 - 4 - 2


The engine body is in two main parts: the cylinder head, and the cylinder block and crankcase (both in one piece).

c. Crankshaft Assembly

This is supported in four main bearings. The pistons are of light metal and are fitted with two compression and one oil-scraper rings. The wrist or piston pins are full floating and are prevented from sideward movement by locking rings on each side.

d. Valve Operation

The overhead valves (one intake and one exhaust for each cylinder) are operated by pushrods and rockers from the camshaft, which is mounted in four bearings in the crankcase. The gasoline pump, tachometer, oil pump, and distributor are all driven from the camshaft.

Valve clearance (warm) Intake 0.2 mm (8/1000 in)
" " Exhaust 0.3 mm (12/1000 in)


e. Cooling

An impeller-type water pump, together with the generator, is driven from a master pulley on the free end of the crankshaft and circulates water between the engine and the radiator (6), which is located at the rear of the vehicle. A small water tank is mounted above the pump.

The laminated radiator is built in a large airduct (16), in which there is a fan (17) driven direct from the crankshaft. The rear end of the airduct may be closed by a flap (18) operated by a hand lever on the left of the driver.

f. Lubrication

Oil is pressure-circulated by a gear pump from the sump through a strainer and passes through the bearings of the crankshaft, connecting rods, camshaft, tappets, and valve rockers at a pressure of 30 to 45 pounds per square inch. Piston pins and cylinder walls are splash-lubricated.

In order that the oil pressure may not rise too high, there is an excess-pressure valve in the wall of the oil pump, and this returns some of the oil to the sump.

An oil cleaner of the metal-disk type is fitted. This is itself cleaned by turning the ratchet on the top.

g. Fuel-Supply

An Opel downdraft carburetor, with a large oil-bath-type air filter (19) on the air intake, is fitted. Gas is drawn from the tanks (of which there are two, each holding 5.5 U.S. gallons) and fed to the carburetor by a mechanical diaphragm pump of normal design, which is driven from the camshaft.

h. Electrical Equipment

Ignition is by Bosch coil and distributor, the latter being driven from the camshaft. A Bosch 75-watt generator, with voltage regulator, is mounted on the right side of the engine and together with the water pump is driven by a V-belt from the master pulley. A Bosch starter motor is also fitted on the right side. The 6-volt battery is mounted on the right side above the track-guard.

i. Starting Equipment

Normally the engine is started by a self-starter controlled by a pull-knob on the dashboard. A crank is also provided and, for use, is inserted in an opening in the radiator grill at the back of the vehicle (just above the trailer coupling) and pushed through to engage with the crankshaft.

j. Transmission

Transmission is through an Opel multiple-spring, single dry-plate clutch, mounted on the flywheel, to a 3-speed-and-reverse gearbox (8), which also incorporates an auxiliary gear box, giving high and low ratios so that in effect 6 forward speeds may be obtained. A long gear-shift lever (20), held near the top in a gate (the H-shaped aperture in which the gear lever operates) on the dashboard in front of the driver, gives the main gear selection, while a shorter lever (21), to the rear of the first, gives selection of high and low ratios for road or cross-country travel. A hinged latch which covers the "reverse" part of the gate prevents accidental engaging of that gear, while an extension of the latch beyond the hinge makes its removal an easy matter.

The vehicle must be stationary while changing ratio in the auxiliary gearbox.

The speedometer is driven from the gearbox.

k. Differential

The differential (22) is of the controlled spur-gear type and incorporates two steering brakes (23), one for each track. These are internal expanding, and in order to increase their braking efficiency the drums are not directly fastened to the axle shafts, but are driven at considerably greater speed from the differential spur pinions through a set of gears.

l. Sprocket

From the differential, the drive passes through the steering brakes (23) and metal couplings (24) to the final reduction gears (25), and thence to the sprockets (26). Each sprocket is a narrow twin-rimmed wheel, of which the inner and outer rims are shod with rubber pads (27) (12 per rim) to form a continuous tire. The pads have the same inside curvature as the rim, but are flat outside. Adjustable rollers (28) (12 per sprocket) are fitted between the rims to act as teeth and to engage the track. An internal expanding brake, which is foot operated, is mounted inside each sprocket.

m. Suspension

(1) Front Wheel

The front wheel (29) is a pressed-steel disk type with a 3.5- by 19-inch tire (tire pressure 34 lbs. per sq. in.) and mounted in a pressed steel, motorcycle front-wheel fork (30) of conventional pattern. The springing (two vertical coil springs) (31), with controllable friction-disk shock absorbers (32), and the steering column (33) are very similar to those of a normal motorcycle.

(2) Track Assembly

The track assembly, which is of the usual type for half-track vehicles, consists on each side of a driving sprocket (26), four equal size, double-rimmed bogie wheels (34 and 35), and an idler wheel (36). Of the bogie wheels, the odd numbers (34) (from the front) are narrow wheels with radial spokes, while the even numbers are wider, pressed-steel disk wheels. The former run between the rims of the latter, the whole bogie and idler system being set rim to axle.

The bogie wheels are mounted on bell cranks (37) fastened to torsion bars, which pass across the body of the vehicle in crosstubes (33) of circular section and are anchored in the opposite side. The torsion bars of the corresponding bogie wheels of the two sides are carried one above the other (39) in the same cross tube.

The idler is simply another narrow-rimmed bogie wheel and is carried on an eccentric arm (40) which can be adjusted by a screw rod (41) passing through a bracket on the body. By this means the position of the idler can be varied, and hence the track tension may be adjusted. The bogie and idler wheel rims have thin, solid rubber tires. There are no return rollers, the track returning along the tops of the bogie wheels.

n. Track

Each track is made up of 40 forged steel links (42) (fig. 1) joined together by a bolt (43). These link joints are lubricated from oil chambers (44) which also, in part, form the tongues of the track links and pass between the rims of the bogie wheels. Above the oil chambers and track bolts, rubber shoes (45) are mounted. These are easily replaceable, being retained by 4 screws (46) only.

Imagen

o. Steering

The motorcycle tractor is steered by the front wheel, by handlebars (47) in the normal manner of a motorcycle, and for sharp turns, by the steering brakes, operating on the tracks.

Two take-off rings (48) at the bottom of the steering column are connected by rods to arms on the brake crosstube (49). These in turn actuate levers, the ends of which are joined by means of adjustable rods to the steering brakes (23).

The steering brakes come into play for turns of over 5°, corresponding to a movement in either direction of about 1 3/4 inches at the ends of the handlebars.

p. Brakes

The footbrake, which is located on the right, and the handbrake (50) both operate an internal expanding brake mounted in each sprocket.

q. Driver's Controls and Instruments

These consist of the following:-

(1) steering handlebars with right hand throttle twist grip;

(2) main and auxiliary gear selection levers;

(3) a footpedal (51) on the left, operating the clutch;

(4) a handbrake (50) mounted on the left of the gearbox cover;

(5) a footbrake on the right;

(6) a radiator shutter control on the inside of the body, left of the driver, -

together with starter button, ignition and lighting switches, tachometer, speedometer, odometer, oil-pressure gauge, and water-temperature gauge.

r. Modifications for Tropical Use

A German document details several modifications which are made to the motorcycle tractor to fit it for use under tropical conditions.

(1) Engine

The oil filler cap has a linen hood tied over it, and the breather pipe has a steel-wool filter held between two pins near the bottom. For cleaning purposes, the filter may be removed after the lower pin has been extracted.

(2) Cooling

In order to provide sufficient cooling, the fan is driven at 1.4 times the crankshaft speed.

(3) Fuel Supply

The Opel carburetor is replaced by a Solex model, believed to be of the duplex downdraft type. A filter is incorporated between the gas tanks and the pump.

(4) Air Filter

The "Knecht Tornado" air filter fitted to the normal vehicle is replaced by a similar type of oilbath filter, incorporating a mechanical precipitator on the inlet side.

(5) Electrical Equipment

A new generator is fitted, while a solenoid-operated starter motor replaces the mechanically-operated type fitted in the normal model. The starter push button is located on the right side of the body level with the driver's seat. The distributor is enveloped in a linen bag.

(6) Transmission

Both main and auxiliary gear levers have linen hoods tied to them to cover their points of entry into the gearboxes. The breather holes in the gearboxes, the steering brakes, and the stub axle housings are all covered with cloth hoods.

(7) Tracks

For special purposes, tracks in which the links have extension plates (52) welded to their outside (figs. 2 & 3) are provided. These are probably for use in very loose sand or swampy ground.

(8) Brakes

The covers of the track brakes have extension plates welded to the upper halves to prevent the entry of sand as much as possible.

(9) Controls

The throttle twist grip is covered with a linen sheath which is tied to the grip at each end and to the handlebars, with sufficient free cloth allowed between these fastenings to permit full movement of the twist grip.

(10) Additional Equipment

A 0.4-gallon container for distilled water, and a gallon tank for radiator water are fitted.

A length of wire (16 to 20 feet) and a 13- by 16-foot tarpaulin complete the special tropical equipment of the motorcycle tractor.

s. Further Particulars

(1) Dimensions


Length, over-all 9 ft 0 in
Width, over-all 3 ft 3 in
Height, over-all 3 ft 11 in
Width between tracks 2 ft 8 in
Wheelbase, from center of front wheel to center of track 4 ft 5 in
Length of track in contact with ground 2 ft 8 in
Belly clearance 9 in

(2) Weight


Without load 2,690 lbs
Loaded 3,470 lbs
Axle load, front wheel 120 lbs
Load on tracks 3,248 lbs

(3) Performance


Maximum speed on roads,
At 3,000 rpm 38 mph
At 4,000 rpm 51 mph*
Trailer capacity 1/2 ton (approx)
Maximum gradient, loose sand
Without trailer 24° (45% or 1 in 2.25)
With trailer 12° (20% or 1 in 5)
Depth of water forded 1 ft 7 in
Fuel capacity 9 gal
Gasoline consumption,
On roads 17 mpg
Cross-country (approx) 12 mpg
Mariano Paz
Socio n°27
1967 M606
1952 M100 Trailer
LU4ALM
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Re: Kettenkrad - Motocicleta Tractor Alemana

Notapor orso 19 » 14 Ago 2013, 04:00

Una reunión de un montón de dinero..... :shock: :shock: :shock:

Imagen
Saludos

Massimo
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Re: Kettenkrad - Motocicleta Tractor Alemana

Notapor martinelterrible » 14 Ago 2013, 22:18

impresionante reunion!!!

hay un buen dossier de la editorial Scuadron muy detallado de la ketten


un abrazo
Martin
Socio n°130
ZUNDAPP KS600
CMP C15
MB 43
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Re: Kettenkrad - Motocicleta Tractor Alemana

Notapor orso 19 » 15 Ago 2013, 05:55

Hola a todos,
este es un excelente grado de conservación aquí en Italia.
Imagen
Imagen
Imagen
Imagen
Saludos

Massimo
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Re: Kettenkrad - Motocicleta Tractor Alemana

Notapor m606paz » 15 Ago 2013, 07:41

Se encuentra sin restaurar Massimo? :shock:

Cual es la historia de esa Kettenkrad? :shock:

El anhanger es es mismo que se observa en las Zundapp y BMW 750 cc? :roll:

Gracias por subir la fotografia! :wink:
Mariano Paz
Socio n°27
1967 M606
1952 M100 Trailer
LU4ALM
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Re: Kettenkrad - Motocicleta Tractor Alemana

Notapor martinelterrible » 15 Ago 2013, 09:21

es estandard en motos,se llama IF8 Infanteriekarren

un abrazo
Martin
Socio n°130
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Re: Kettenkrad - Motocicleta Tractor Alemana

Notapor m606paz » 15 Ago 2013, 09:38

Gracias Martin!

El semioruga tiene la pintada la palabra achtung! Estara configurado como Vehiculo Capturado? :roll:
Mariano Paz
Socio n°27
1967 M606
1952 M100 Trailer
LU4ALM
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Re: Kettenkrad - Motocicleta Tractor Alemana

Notapor orso 19 » 15 Ago 2013, 13:56

Hola Mariano!
Le contesté en italiano a través de email, la respuesta era demasiado largo para mí :D :D

Perfect Martin! :wink:
Saludos

Massimo
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Re: Kettenkrad - Motocicleta Tractor Alemana

Notapor m606paz » 15 Ago 2013, 15:30

Gracie Massimo, come me fai lavoraré!! :x :lol:
Faccio una breve traduzione...

orso 19 escribió: esempio "A" company avevano soprannomi che iniziavano con la lettera A come Anne , Annabelle ecc. "B" company Belle, Betty Brass-city ecc. "C" company Charly, Coconut, ecc. "D" company Dave, Diamond, ecc.

Il codice radio del mio Halftrack M16 Achtung!, lo ho copiato da una foto originale del signal corps dove si vedono diversi halftrack che stanno entrando in una città tedesca, e quello in primo piano ha la scritta ACHTUNG!


Las companias de medios acorazados eran nombras con la las letras A B C D y por ejemplo los acorazados de la compania A llevaban sobrenombres con A , Annabelle ,
Con respecto a la palabra ACHTUNG en el semioruga , la misma se pinto por que vio en una foto de epoca de tropas americanas ya en Alemania, con esa descripcion.

Se entiende mejor en Italiano, no?? :roll: :D

Massimo, esta informacion te obliga a armar un post nuevo de tu semioruga!! Más fotos!

De regreso al Kettenkrad

Imagen

orso 19 escribió:La storia di questo Kettenkrad che io conosco è questa: è stato comprato anni fa ad un mercato internazionale di ricambi e auto d'epoca che si svolge ogni anno all'interno del circuito di IMOLA, dove si correva la Formula 1. Il suo prezzo per i tempi era altissimo, ma se vediamo i prezzi attuali di questi mezzi, è stato un affare! Il bello è che era tutto verniciato con l' olive drab ed aveva ancora le insegne della 34° Division Red Bull, utilizzato come preda bellica. Il nuovo propietario, essendo un restauratore di affreschi e di quadri antichi, ha utilizzato le stesse tecniche e in sei mesi ha tolto millimetro dopo millimetro la vernice OD facendo riaffiorare la sua vernice originale color sabbia. La partticolarità del rimorchio invece è quella di avere le ruote completamente in ferro, senza i pneumatici.


El Kettenkrad se compro años atras en una feria de autos de epoca que se hace en el autodromo de Imola. El precio en esa epoca fue altisimo, pero pensandolo ahora hubiese sido un buena compra! Estaba pintado todo de verde oliba y con las insignias de la 34° Division Red Bull como presa de guerra. El nuevo propietario, al ser un restaurador de frescos y pinturas antiguas, ha utilizado las mismas técnicas y en seis meses se ha eliminado la pintura milímetro a milímetro OD para hacer resurgir su color arena de la pintura originales.
Mariano Paz
Socio n°27
1967 M606
1952 M100 Trailer
LU4ALM
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Re: Kettenkrad - Motocicleta Tractor Alemana

Notapor orso 19 » 15 Ago 2013, 16:02

Mariano muy bien!
contratado como traductor :D
Saludos

Massimo
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Re: Kettenkrad - Motocicleta Tractor Alemana

Notapor m606paz » 15 Ago 2013, 17:04

orso 19 escribió:Mariano muy bien!
contratado como traductor :D


Sono un traduttore che si fa pagare a caro prezzo per i servizi!
Accetto Lire!
Mariano Paz
Socio n°27
1967 M606
1952 M100 Trailer
LU4ALM
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Re: Kettenkrad - Motocicleta Tractor Alemana

Notapor orso 19 » 15 Ago 2013, 18:05

m606paz escribió:
orso 19 escribió:Mariano muy bien!
contratado como traductor :D


Sono un traduttore che si fa pagare a caro prezzo per i servizi!
Accetto Lire!

Jajajaja
perfecto, coctratado, las Liras son fuera de curso!!!!! :D :D
Saludos

Massimo
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Re: Kettenkrad - Motocicleta Tractor Alemana

Notapor luisal1945 » 18 Abr 2017, 20:23

Es un vehiculo muy ingenioso, a medida que los usaban debieron ir haciendo ajustes como por ejemplo las orquillas ya que, las primeras orquillas se rompian facilmente. Otro inconveniente que tenian eran las perdidas de aceite.
En total se habrian fabricado mas de 8000 unidades.
Luis Alvira
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Re: Kettenkrad - Motocicleta Tractor Alemana

Notapor luisal1945 » 18 Abr 2017, 20:28

Un par de fotos..ImagenImagen

Enviado desde mi SM-G925I mediante Tapatalk
Luis Alvira
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Re: Kettenkrad - Motocicleta Tractor Alemana

Notapor luisal1945 » 15 Jul 2017, 20:48

Soldados americanos en una Kettenkrad capturada a los alemanes
Imagen

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