Renault 551, 651, 681, 751, 781, 851 ⚙️ Specs

Technical Specifications of the Renault 551 Agricultural Tractor:

Renault 551 Agricultural Tractor was manufactured between 1972 and 1980. It is equipped with an MWM D226-3 engine with a displacement of 3117 cm³, a three-cylinder unit delivering a maximum power output of 55 HP at 2350 RPM and a torque of 187 Nm at 1500 RPM. The powertrain includes a mechanical gearbox with a shuttle, offering 12 forward and 3 reverse gears, all synchronized, allowing speeds from 0.6 to 21.9 km/h, with a maximum of 25 or 30 km/h. The hydraulic system features a pump with a capacity of 26 L/min and a mechanically controlled rear hitch with a maximum lifting capacity of 2000 kg. The power take-off (PTO) operates at 540 or 750 RPM. The braking system is hydraulically operated, and the turning radius is 6.7 m for the 2WD version and 11.4 m for the 4WD version. The 2WD tire sizes are 6.50-16 (front) and 14.9-28 (rear), while the 4WD version has 11.2-24 (front) and 14.9-28 (rear) tires. The total weight is 2630 kg for the 2WD version and 2945 kg for the 4WD version. The tractor has a height of 235 cm, a length of 355 cm, a width of 211 cm, and a fuel tank capacity of either 48 or 65 liters. The cabin noise level is 86.5 dB.

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Technical Data Sheet for Renault 551, 651, 681, 751, 781, 851 Agricultural tractors:

Model Renault 551 Renault 651 Renault 681 Renault 751 Renault 781 Renault 851
Years of production 72-80 72-80 79-80 73-80 77-80 74-80
Engine designation/type MWM D226-3 MWM D227-4 MWM D227-4 MWM D226-4 MWM D226-4 MWM TD226-4
Number of cylinders / Turbo / Intercooler 3 4 4 4 4 4T
Engine displacement (cm³) 3117 3770 3770 4154 4154 4154
Piston diameter / Stroke (mm) 105×120 100×120 100×120 105×120 105×120 105×120
Maximum engine power (HP) / at RPM 55/2350 65/2350 68/2350 75/2350 78/2350 85/2350
Torque (Nm) / at RPM 187/1500 206/1600 230/1500 255/1500 274/1350 290/1400
Number of gearbox speeds (forward + reverse) 12+3 12+3 12+12 12+12 12+12 12+12
Number of synchronized gears (forward + reverse) 12+3 12+3 12+12 12+12 12+12 12+12

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Fast gearbox / Power shift – – – – – –
Reverser type mech mech mech mech mech mech
Speed range (km/h) 0,6-21,9 0,6-22,8 0,8-24,8 0,8-22,9 0,9-24,2 0,8-22,6
Maximum speed (km/h) 25/30 – – – – –
Hydraulic pump capacity (L/min) 26 26/32 30,3 31,3 31,3 31,3
Rear three-point hitch (TUV) control type mech mech mech mech mech mech
Maximum rear three-point hitch (TUV) lift capacity (kg) 2000 2000 3850 2750/3850 3850 2750
Power take-off (PTO) speed (RPM) 540/750 540/750 540/1000 540/1000 540/1000 540/1000
Type of disc brake (dry/wet) – – – – – –
Brake system control type hydr hydr hydr hydr hydr hydr
Turning radius 2WD (m) 6,7 6,8 9,8 – – –
Turning radius 4WD (m) 11,4 10,1 – – – –

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Front tire size 2WD 6,50-16 7,50-16 7,50-18 7,50-18 7,50-18 7,50-18
Front tire size 4WD 11,2-24 11,2-24 12,4-24 12,4-24 12,4-24 –
Rear tire size 2WD 14,9-28 16,9-28 16,9-30 16,9-34 16,9-34 16,9-34
Rear tire size 4WD 14,9-28 16,9-28 16,9-30 16,9-34 16,9-34 16,9-34
Total weight 2WD (kg) 2630 2745 3275 2995 3500 3015
Total weight 4WD (kg) 2945 3310 3385 3415 3900 3435
Total height with cabin (cm) 235 235 251 270 270 –
Total length (cm) 355 365/381 382/404 399/413 399/413 –
Total width (cm) 211 224/223 237/241 243 243 –
Fuel tank capacity (L) 48/65 65 82 77 77 77
Cabin noise level (dB) 86,5 89,5 89 85,5 – –

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