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Zetor 5 er-Serie (UR 1)

4 models in this series

The 5 er-Serie (UR 1) series from Zetor comprises 4 models.

Zetor 5 series (UR I) – early tractors 2511, 3511/3545, 4511 and 5511/5545 from Brno in the 1960s and 1970s, two- to four-cylinder diesels from 17 to 38 kW, Zetor's first generation

Zetor 2511
Pictured: Zetor 2511

The 5 series forms Zetor's in-house UR I generation and thus the first post-war series from Zetor, built at the home plant in Brno from the 1960s. Type numbers 2511, 3511, 4511 and 5511 reflect the power class in horsepower in their first two digits, while pairings such as 3511/3545 and 5511/5545 denote different execution variants of the same base type within this generation. UR I was later followed at Zetor by the UR II (Crystal) and UR III generations.

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The register lists four versions here with 16.9 to 38.2 kW from two- to four-cylinder diesel engines with 1,559 to 3,119 cm³ displacement. Rated speed lies between 2,000 and 2,200 rpm, unladen weight ranges from 1,340 to 2,444 kg with lengths from 3,040 to 3,710 mm, widths from 1,620 to 1,833 mm and heights from 1,456 to 1,620 mm; torque lies between 88 and 188 Nm.

As Zetor's first modern generation, the 5 series, with its robust and simple technology, laid the groundwork for the brand's export success into the Eastern Bloc and numerous developing countries, where it remained in agricultural use for decades.

When buying used, on these older tractors check the condition of the clutch and gearbox, tightness of the injection pump, corrosion on the wings and bonnet, and wear on the front axle and steering linkage. Parts for this widely used generation remain well available through specialist Zetor used-parts dealers in central and eastern Europe.

Sources: SpecCodex register, model data: Zetor 5 er-Serie (UR 1), Zetor (manufacturer)

Models compared

4 of 4 models.

25111968–1975 3511/35451967–1972 45111968–1972 5511/55451966–1972
Power 16.9 kW 25.7 kW 35.3 kW 38.2 kW
Rated speed 2,000 rpm 2,000 rpm 2,000 rpm 2,200 rpm
Cylinders 2 3 4 4
Displacement 1,559 cm³ 2,339 cm³ 3,119 cm³ 3,119 cm³
Torque 88 Nm 133 Nm 188 Nm –
Fuel tank capacity 38 l – 70 l –
Forward gears 10 – 10 –
Reverse gears 2 – 2 –
Top speed 20 km/h 25 km/h 25 km/h 30 km/h
Wheelbase 1,745 mm 1,918 mm 2,125 mm 2,257 mm
Length 3,040 mm 3,266 mm 3,555 mm 3,710 mm
Width 1,620 mm 1,652 mm 1,790 mm 1,833 mm
Height 1,456 mm 1,620 mm 1,620 mm 1,620 mm
Unladen weight 1,340 kg 1,530 kg 2,010 kg 2,444 kg

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