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SOMECA DA 50 Specs ( 1952-1955 )

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Overview

The SOMECA DA 50 is a 2WD farm tractor manufactured in Saint-Denis, France, between 1952 and 1955. It is powered by a 3.8L four-cylinder OM Milano diesel engine and equipped with a five-speed gear transmission and an open operator station. Performance testing conducted in 1953 recorded a maximum belt output of 38.94 hp and a maximum drawbar pull of 4715 lbs.

Ideal Applications

Tested Performance Data: According to Nebraska Tractor Test 495, the unit achieved a maximum tested belt power of 38.94 hp and a maximum drawbar pull of 4715 lbs in gear two.
Diesel Powertrain Configuration: The tractor features a 3.8L liquid-cooled inline diesel engine with direct injection, a 16:1 compression ratio, and a rated speed of 1500 RPM.
Mechanical and Hydraulic Systems: The mechanical layout includes a five-speed forward gear transmission, manual steering, mechanical drum brakes, and a hydraulic pump with a flow rate of 1.9 gpm.

Production

Description Standard-tread tractor / Built in Saint-Denis, France
Manufacturer SOMECA

Engine

Engine type OM Milano 3.8L 4-cyl diesel
Air cleaner oil bath
Bore/Stroke 3.937x4.724 inches (100 x 120 mm)
Compression 16:1
Coolant capacity 18 qts (17.0 L)
Description OM Milano COD/40 / diesel / 4-cylinder / liquid-cooled inline
Displacement 230 ci (3.8 L)
Firing order 1-3-4-2
Fuel system direct injection
Rated RPM 1500
Starter electric
Starter volts 12
Belt (claimed) 35 hp (26.1 kW)
Belt (tested) 38.94 hp (29.0 kW)
Drawbar (claimed) 26 hp (19.4 kW)
Drawbar (tested) 33.37 hp (24.9 kW)

Transmission

Clutch mechanical dry disc
Gears 5 forward and 1 reverse
Transmission type 5-speed gear
Type gear

Mechanical

Cab Open operator station.
Description Manual steering / Mechanical drum brakes
Drive type Two-wheel drive

Hydraulics

Pump flow 1.9 gpm (7.2 lpm)

PTO

Engine RPM 540@1421
Rear PTO Type 540 (1.375)

Electrical

Batteries 2
Battery volts 6
Ground negative

Dimensions & Tires

Height (hood) 61 inches (154 cm)
Height (steering wheel) 73.2 inches (185 cm)
Length 116.5 inches (295 cm)
Operating weight 4740 lbs (2150 kg)
Rear tread 57.1 to 75.6 inches (145 to 192 cm)
Shipping weight 4586 lbs (2080 kg)
Wheelbase 74.8 inches (189 cm)
Front tire 6.00-19
Rear tire 12-24
Weight 4586 to 4740 pounds
Wheelbase 74.8 inches (189 cm)
Ag front 6.00-19 / 5.50-20
Ag rear 12-24 / 12-28

Nebraska Tractor Test 495

Belt fuel use (max) 2.5 gal/hour (9.5 l/hour)
Belt power (max) 38.94 hp (29.0 kW)
Description Diesel 5-speed 2WDJune 8 - 13, 1953Link: Nebraska Tractor Test 495 file / Drawbar performance / Gear 4 used for power test. / Gear 2 used for pull test.
Max power 33.37 hp (24.9 kW)
Max pull 4715 lbs (2138 kg)

References

Description The tractor for medium sized farms published in 1952, by SOMECA / DA50 published in 1952, by SOMECA / DA50 and suitable tools published in 1952, by SOMECA / Operator's Manual DA50

Nebraska Tractor Test Results

Test #495
Download PDF
Test Date: June 8 to June 13, 1953
Location: Department of Agricultural Engineering, University of Nebraska College of Agriculture, Lincoln, Nebraska

This section is compiled from original Nebraska Tractor Test PDFs using AI-assisted extraction and human review. For full verification, download the source PDF above. Differences between reports, incomplete source data, and occasional extraction or data entry mistakes can occur.

PTO Drawbar Hydraulics Technical Sound Tires & Weight

Maximum Power & Fuel Consumption

Torque Statistics

Maximum Torque N/A
Torque Rise N/A

PTO Power Curve

43 32 22 11 0 37 hp @ 0 rpm 37 0 35 hp @ 0 rpm 35 0 27 hp @ 0 rpm 27 0 21 hp @ 0 rpm 21 0 18 hp @ 0 rpm 18 0 9 hp @ 0 rpm 9 0 1 hp @ 0 rpm 1 0 MAX: 37.3 HP ENGINE RPM POWER (HP)

Varying Power & Fuel Consumption

Click column headers to sort

Power RPM gal/hr lb/hp·hr hp·hr/gal DEF gal/hr
35.32 1505 N/A N/A N/A N/A
0.76 1557 N/A N/A N/A N/A
18.06 1532 N/A N/A N/A N/A
37.26 1452 N/A N/A N/A N/A
9.12 1545 N/A N/A N/A N/A
26.80 1520 N/A N/A N/A N/A
21.22 1518 N/A N/A N/A N/A