AS ISO 6015:2021 pdf download – Earth-moving machinery — Hydraulic excavators and backhoe loaders — Methods of determining tool forces.
4  Measurement methods 4.1  Test site and general The test site shall consist of a level, hard surface, with anchor points and space for using the measuring devices specified in 4.2.1 to 4.2.3. For measurements made below the ground plane, a space below that plane is required for acceptance of the machine tool and the measurement devices, the anchorage and any auxiliary equipment. All measurements shall be accurate to within ± 2 % or shall accord with an International Standard relative to test equipment accuracy. In the preferred method, the force to be measured is applied directly to the force measuring device (4.2.1). If the force is applied via a pulley, its friction should be taken into account. The wire rope (4.2.4) should be as short as possible to minimize the affect on accuracy. 4.2  Test apparatus 4.2.1 Force measuring device, of accuracy according to ISO 9248. 4.2.2 Hydraulic oil pressure measuring device, of accuracy according to ISO 9248. 4.2.3 Instrument(s) for measuring linear dimensions, of accuracy according to ISO 9248. 4.2.4 Wire ropes and shackles, pulley, safety chains and adjustable supporting frames. 4.3  Preparation for testing The machine shall be equipped according to ISO 6016. The machine shall be fitted with the bucket, grab or clamshell and appropriate counterweights, and shall have the tyre pressure, and tyre ballast or track tension as specified by the manufacturer. The hoe, shovel, grab or clamshell equipment for each test shall be as specified by the manufacturer.
4.5  Limit conditions The limit condition for each test shall be noted. If the hydraulic limit condition is reached, the report should note the system or circuit in which the maximum relief circuit hydraulic pressure was exceeded. If the tipping limit condition is reached, the tool force shall be measured after the onset of tipping. If the slipping limit condition is reached, the machine shall be anchored and the reported results should indicate that the maximum tool force was obtained by anchoring the machine. 4.6  Pivot positions When alternative pivot positions for the boom, arm, attachment and cylinders and/or a telescopically adjustable boom are available, the relative pin positions of boom, arm and bucket fixing and/or the telescopic boom position as tested shall be recorded. 4.7  Outriggers For machines fitted with outriggers, the tests shall be conducted with the outriggers raised or lowered as specified by the manufacturer. 4.8  Measurement procedure 4.8.1  General Each test shall be conducted three times, and the maximum tool force for each test shall be noted; the arithmetic mean of these three values shall be recorded in the test results. The tool forces shall be measured in accordance with the specified requirements. For buckets with a curved or pointed cutting edge, the tool forces shall be measured at the centre of the bucket width. The direction of the tool forces to be measured shall be tangential to the arc described by the bucket lip. For each machine equipped with hoe, shovel, or telescoping boom equipment, bucket and arm tool forces are required to properly determine the tool forces. For each machine equipped with either grab or clamshell equipment, only the grab/clamshell closing force is required for proper determination.