Test Procedure for Measuring Hydraulic Lift Capacity on Agricultural Tractors Equipped with Three-point Hitch

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Test Procedure for Measuring Hydraulic Lift Capacity on Agricultural Tractors Equipped with Three-point Hitch

The lift capacity can be determined by Section 4 and/or Section 5. When the results are recorded, the test method shall be identified. The three-point hitch static lift force test procedure was revised to be comparable to current ISO and to 1990 changes to OECD Test Codes. (See OECD document AGR/CA/T(91)24/REV1 for reference.) These test codes use a static lift force corrected to 90% of minimum hydraulic pressure to reflect usable in-field lift forces. This revision is also being proposed for J2708. The dynamic lift capacity test procedure was expanded to include additional lift times. Lift capacity values for 3 s and 6 s lift times were added to the existing 10 s lift time. This was also done to be more representative of in-field operations. Determination of tractor height as tested was expanded to include rubber-tracked vehicles. The report form was revised to reflect these changes. J283 is not technically equivalent to ISO 789/II due to: a Current differences between SAE (ASAE) and ISO hitch dimensions as tested. b SAE does not include a lift test at the hitch points. c ISO does not have a dynamic test procedure.