AS ISO 5353:2020 Earth-moving machinery, and tractors and machinery for agriculture and forestry一 Seat index point.
To obtain a good fit between the seat cushion, the back cushion, and the SIP measuring device, alternately apply and release a horizontal rearward force of approximately 100 N at the location noted in figure 1, and rock the device from sIde to side.
Add further masses to bring the total mass of the device from 26 kg ± 1 kg to 65 kg ± 1 kg such that the vertical force centre of the additional masses is 40 mm in front of the SIP mark on the horizontal section of the device (see figure 1).
NOTE 3 A 75 kg operator approximates the 65 kg weighted device on the seat.
Repeat the alternate loading and releasing, and the rocking of the device, checking to make sure the device is laterally central and level on the seat.
Make measurements on each side of the SIP measuring device at points an equal distance from the central vertical plane (see figure 2). Average the values. Record within ± 1 mm the coordinate dimensions of the SIP from the fixing point on the seat assembly (see figure 3) that is defined by the manufacturer.
Some machines have seats which fulfil multiple functions, usually by rotating the seat. Functions may include using machine equipment or operating the machine in travel mode. For these cases, it may not be possible readily to calculate the location of the different SIPs relative to the fixing point. In these cases, repeat 5.2 and 5.3 for each of the positions.
The test report shall include the following information:
a) reference to this International Standard;
b) a full description of any test conditions or adjustments different from those specified in this International Standard;
c) a drawing or sketch of the seat assembly showing the coordinate dimensions between the fixing point and the SIP (see figure 3 for an example);
d) description of the seat adjustment ranges available relevant to 5.2.AS ISO 5353 pdf download.