Praga V3S

Praga
V3S
Manufacturer:	Praga , Avia , BAZ
Production period:	1953-1990
Previous model:	none
Successor:	none
	Technical specifications
Engines:	see below
Perm. Total weight:	8.6-10.6 t

engine
Type	6-cylinder four-stroke diesel engine T912, in-line arrangement in longitudinal direction, air-cooled
Displacement	7.412 cm ³
Bore / stroke	110/130 mm
High performance	72 kW (98 PS) at 2,100 rpm
Max. Torque	353 Nm at 1,400 rpm
Fuel tank	120 l
Power transmission
Two-disc dry clutch with mechanical shut-off, hydraulically operated, mechanical 4-speed gearbox without synchronization, all wheels driven
chassis
Ladder frame made of rectangular steel profiles, rigid portal axles, 8.25-20 tires, front axle with mechanical worm steering and power steering, rear axles with a common leaf spring ( bogie axles ).
Brakes
Pneumatic dual-circuit service brake system (load-dependent) with drum brakes, parking brake with pawl acting on the rear wheels, engine brake
construction
Short-hood design , fixed driver's cab, 3 seats, 2 doors, split windscreen, windscreen wipers on driver and passenger side, front window can be folded up
Dimensions, weights and performance (flatbed truck)
Length Width Height	6,355 / 2,240 / 2,350 mm
wheelbase	3,580 + 1,120 mm
Tires	8.25–20, front single-rear twin tires
Gauge v / h	1,870 / 1,755 mm
Ground clearance	400 mm
Empty weight	5,780 kg
payload	4,650 kg
Trailer load	5,000 kg
Top speed	60 km / h
consumption	approx. 30 l per 100 km

The Praga V3S is a three-axle all -terrain truck that was produced by different manufacturers in Czechoslovakia from 1953 to 1990 . It is more easily derived from the Tatra 111 in its construction. In the long period of its production, around 130,000 copies were made.

History of origin and area of application

This vehicle was manufactured by Praga from 1953 to 1969 , and around 71,000 are said to have been made during this time. From 1960 truck production took place at AVIA , from then on Praga concentrated on the production of engines and transmissions. From 1987 to 1990 the Praga V3S was manufactured at BAZ in Bratislava .

The great success of the vehicle is based on its off-road capabilities, its maneuverability, its robust construction and its low weight. It was produced in almost every version and used wherever other vehicles could not drive. Because of its ground clearance, the car was more off -road than a W50 with all-wheel drive . The side slope should have been 40 ° with him. They made it e.g. B. to drive through a meter deep water without consequences. He could easily overcome obstacles 40 cm high. What was an advantage in the field turned out to be a disadvantage on the road; so the car could drive a maximum of 60 km / h. During the long production, however, only a few improvements were made to the technology and operation, so that the truck is now being replaced more and more by more modern vehicles. In use for 60 years now, certain operating instructions are no longer standard. The driving characteristics and the steering no longer meet today's standards. Overall, the vehicles with the nicknames ventra , vejtřaska , vejda or vetřiska have received a folk reference.

The Praga V3S has been exported and successfully used in numerous countries. About 200 vehicles are said to have reached the GDR and were used primarily as rear tippers, as workshop vehicles and faeces vehicles.

technology

The engine is an air-cooled in-line six-cylinder diesel engine with a side camshaft . derived from that of Tatra 111 . He has 7412 cc, en pays 70 kW at 2100 min ^-1 . Later an engine with a displacement of 8100 cm³ was installed. The vehicle reaches a maximum speed of 60 km / h. Consumption is 32 liters per 100 km in summer and 37 liters in winter. The vehicle is equipped with a 120 liter tank. All drive and auxiliary units are arranged high enough so that the specified fording depth can be achieved without any problems. The engine cooling was left as air cooling , which undoubtedly corresponded to a requirement of the military. The transmission has 4 forward gears, 1 creeper and 2 reverse gears. It has no synchronization, so the vehicle is one of the last that still has to be double-declutched. The chassis was designed as a ladder frame , the rigid portal axles are sprung with leaf springs and guided on the frame.

The rear tippers had an all-steel body with a capacity of 2.6 m ³ and a payload of 4,650 kg. The workshop trolleys were preferably used to repair open-cast mining machines and vehicles, which no longer had to be costly and time-consuming to be transported to a workshop for repairs. A front-mounted crane was used to lift loads up to 1,000 kg. The sewage wagons had a tank with a capacity of 3.5 m ³ . There was a pump for filling and emptying , which generated either positive or negative pressure. The entire container could be filled in 3.5 minutes at a suction height of 2 meters, and emptying under pressure took 2 minutes.