BS ISO 12934:2021 pdf download – Tractors and machinery for agriculture and forestry — Basic types — Vocabulary

BS ISO 12934:2021 pdf download – Tractors and machinery for agriculture and forestry — Basic types — Vocabulary
Note 1 to entry: This term is not to be confused with track (see ISO 789-13:2018, 3.3) that measures vertical planes through the centreline of the tyres.
3.2.1
agricultural tractor
self-propelled agricultural vehicle (3.1.2) having at least two axles and wheels, endless tracks, or a combination of wheels and endless tracks, particularly designed to pull, push, carry or provide power to operate implements or pull agricultural trailers and implements, or any combination of these functions used for agricultural work (including forestry work), which may be provided with a load platform Note 1 to entry: The agricultural vehicle (3.1.2) has a maximum design ground speed (3.1.4) of not less than 6 km/h and may be equipped with more than one seat.
3.2.1.1
standard agricultural tractor
agricultural tractor (3.2.1) having a minimum wheel track width of 1 150 mm or greater, the overall width not exceeding 2,55 m with at least one permissible tyre or endless track combination, an unladen mass, in running order, of 400 kg or greater, and a ground clearance of 1 000 mm or less
3.2.1.2
two-wheel drive tractor
agricultural tractor (3.2.1) with traction power provided only through the rear tyres
Note 1 to entry: The front tyres are smaller than the rear and typically use a profile type with no traction capability.
3.2.1.3
all-wheel drive tractor
agricultural tractor (3.2.1) with two axles or more, having power to all axles
Note 1 to entry: The drive of one or more axles may be disengageable.
3.2.1.3.1
four-wheel drive tractor with unequal sized wheels
all-wheel drive tractor (3.2.1.3) with primary power provided through the rear tyres and disengageable power through the front tyres
Note 1 to entry: The front tyres are generally larger in rolling radius than those of a two-wheel drive tractor and use a tyre profile that will transmit traction capability.
3.2.1.3.2
four-wheel  drive tractor with equal sized wheels
all-wheel drive tractor (3.2.1.3) with equal sized wheels and having power to both axles
3.2.1.3.3
all-wheel drive tractor with more than 2 axles
all-wheel drive tractor (3.2.1.3) with more than two axles having power to all axles
3.2.1.4
track-laying tractor
agricultural tractor (3.2.1) propelled by belted or linked endless tracks or by a combination of wheels and endless tracks
Note 1 to entry: Belted units in this definition may have a positive, friction, or combination positive-friction drive. Belts that fit over regular tractor tyres are not included in this definition.
3.2.1.5
articulated tractor
agricultural tractor (3.2.1) that is steered by means of a centre pivot articulation system
3.2.1.6
small tractor
agricultural tractor (3.2.1) having an unladen mass, in running order, of less than 400 kg3.
2.1.7
compact utility tractor
agricultural tractor (3.2.1) equipped with a 540 r/min rear PTO and a three-point hitch designed forCategory l implements only
Note 1 to entry: These tractors generally have a mass less than 1 800 kg; have less than 30 PTO kW, and areprimarily designed and advertised for use with mowers and light-duty material handling equipment. The rearPTO and hitch categories are defined by ISO 500-1 or IS0 500-2 and ISo 730, respectively.
3.2.1.8
extra wide tractor
agricultural tractor (3.2.1) characterised by their large dimensions,primarily intended for workinglarge areas of farmland
Note 1 to entry: Tractors with large tread width are covered by this definition.
3.2.1.9
high speed tractor
agricultural tractor (3.2.1) having a maximum design ground speed greater than 40 km/h3.2.1.10
specialized tractor
agricultural tractor ( 3.2.1) designed to operate in special field conditions (e.g. in vineyards, orchards,speciality row crops),and that requires unique design configurations(e.g.low clearance, high clearance,narrow profile,) for functional operation
3.2.1.10.1
boat tractor
agricultural tractor (3.2.1) supported by a boat body and propelled by the wheels of the tractor3.
2.1.10.2
high clearance tractor
agricultural tractor (3.2.1) having clearance under the front and rear axles greater than the standardagricultural tractor (3.2.1.1)
Note 1 to entry: High-clearance tractors are typically designed for operation in vegetables, cotton, rice, tobaccoor other speciality row crops requiring high clearance to avoid crop damage and are characterized by theaddition of extended length axle spindles for front axles with rear axle modifications that provide an axle outputsignificantly below the centreline of the rear axle trumpets. They are normally equipped with large diameter,narrow width tyres to minimize crop damage.
3.2.1.10.2.1
mudder tractor
specialized high-clearance tractor (3.2.1.10.2)，designed for adverse field conditions， and usuallyequipped with front wheel drive assist
Note 1 to entry: Mudder tractors are typically equipped with four equal sized large diameter, narrow width tyres.
3.2.1.10.3
low clearance tractor
agricultural tractor (3.2.1) having clearance under the front and rear axles less than the standardagricultural tractor (3.2.1.i) and typically having low profile body work and foldable ROPS.BS ISO 12934 pdf download.