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Inspection of Tractors & Agricultural and Forestry Machinery

Standardized Evaluation for Productivity and Environmental Compliance

Agricultural and forestry vehicles (AGRICULTURAL AND FORESTRY MACHINERY) are machines used in farming for planting, maintenance, and harvesting of crops, as well as in forestry operations aimed at sustainable forest management. These machines play a vital role in increasing productivity in the sector. According to the Iranian National Standard No. 13259:2020, they are categorized under Group T vehicles.

Vehicle Classification for Inspection

Based on International Standards

Group T (All Wheeled Tractors) (Index "a" for speeds ≤ 40 km/h and Index "b" for speeds > 40 km/h)

T T1
All wheeled tractors
  • Running mass > 600 kg & ground clearance ≤ 1000 mm & track width (nearest axle to the driver, unladen) 1000 mm.
T T2
All wheeled tractors
  • Running mass > 600 kg & ground clearance ≤ 600 mm & track width (unladen) 1150 mm.
  • (If the ratio of the center of gravity height to the average minimum track width of the axles > 0.9, the max design speed must be limited to 30 km/h.)
T T3
All wheeled tractors
  • Running mass ≤ 600 kg
T T4-1
High-chassis tractor (high clearance)
  • In working position, ground clearance (perpendicular to crop rows) > 1000 mm.
  • (If the ratio of the center of gravity height to the average minimum track width of the axles > 0.9, the max design speed must be limited to 30 km/h.)
T T4-2
Extra-wide tractor – characterized by very large dimensions, used in large farmlands.
  • No specific details provided.
T T4-3
Low-chassis tractor – four-wheel drive, with interchangeable agricultural or forestry equipment.
  • Characterized by a stabilizing frame with one or more PTOs, max permissible technical mass of 10 tons,
  • Ratio of this mass to the max running mass < 2.5,
  • And max center of gravity height (with standard tires) < 850 mm.

Group R (Trailers) (Index "a" for speeds ≤ 40 km/h and Index "b" for speeds > 40 km/h)

R R1
Trailers
  • Max permissible technical load per axle does not exceed 1500 kg.
R R2
Trailers
  • Max permissible technical load per axle > 1500 kg and ≤ 3500 kg.
R R3
Trailers
  • Max permissible technical load per axle > 3500 kg and ≤ 21000 kg.
R R4
Trailers
  • Max permissible technical load per axle > 21000 kg.

Group S (Towed Interchangeable Machines) (Index "a" for max speeds ≤ 40 km/h and Index "b" for max speeds > 40 km/h)

S S1
Towed interchangeable machines
  • Max permissible technical load per axle does not exceed 3500 kg.
S S2
Towed interchangeable machines
  • Max permissible technical load per axle exceeds 3500 kg.

Group C (Tracked Tractors or Wheel-Track Combinations)

C
Tracked tractors or wheel-track combinations
  • Classification is identical to group T.