ISO 789-9:2018
Agricultural tractors — Test procedures — Part 9: Power tests for drawbar
ISO 789-9:2018 specifies test procedures for determining the power available at the drawbar on agricultural tractors of the wheeled, track-laying or semi-track-laying type.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Measurement units and tolerances
5 General requirements
5.1 Selection
5.2 Running-in and preliminary adjustments
5.3 Manufacturer's instructions
5.4 Repairs
5.5 Preliminary information
5.6 Fuels and lubricants
5.6.1 Selection
5.6.2 Measuring consumption
5.6.3 Tractors equipped with diesel particulate filters
5.7 Auxiliary equipment
5.8 Ambient conditions
5.9 Tractor conditions
5.9.1 Tyres
5.9.2 Ballast
5.10 Slip
5.11 Testing rules
5.12 Required measurements
5.13 Warm-up
6 Test procedure
6.1 Maximum power
6.1.1 General
6.1.2 Geared transmissions
6.1.3 Continuously variable transmissions
6.2 Fuel consumption
6.2.1 General
6.2.2 Nominal speed of 7,5 km/h
6.2.3 Nominal speed between 7 and 10 km/h
6.2.4 Continuously variable transmissions
6.2.5 Alternative tractor configuration
6.3 Tractors without PTO capable of transmitting full engine power
6.3.1 General
6.3.2 Varying drawbar pull and speed at full load
6.3.3 Continuous one hour test at maximum power
6.4 Statement of power rating
7 Test report
Annex A (normative) Drawbar tests — Measurement of tyre tread and track
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Measurement units and tolerances
5 General requirements
5.1 Selection
5.2 Running-in and preliminary adjustments
5.3 Manufacturer's instructions
5.4 Repairs
5.5 Preliminary information
5.6 Fuels and lubricants
5.6.1 Selection
5.6.2 Measuring consumption
5.6.3 Tractors equipped with diesel particulate filters
5.7 Auxiliary equipment
5.8 Ambient conditions
5.9 Tractor conditions
5.9.1 Tyres
5.9.2 Ballast
5.10 Slip
5.11 Testing rules
5.12 Required measurements
5.13 Warm-up
6 Test procedure
6.1 Maximum power
6.1.1 General
6.1.2 Geared transmissions
6.1.3 Continuously variable transmissions
6.2 Fuel consumption
6.2.1 General
6.2.2 Nominal speed of 7,5 km/h
6.2.3 Nominal speed between 7 and 10 km/h
6.2.4 Continuously variable transmissions
6.2.5 Alternative tractor configuration
6.3 Tractors without PTO capable of transmitting full engine power
6.3.1 General
6.3.2 Varying drawbar pull and speed at full load
6.3.3 Continuous one hour test at maximum power
6.4 Statement of power rating
7 Test report
Annex A (normative) Drawbar tests — Measurement of tyre tread and track
Bibliography