ANSI B71.8 pdf free download
ANSI B71.8 pdf free download.Powered Walk- Behind Rotary Tillers and Hand-Supported Cultivators一 Safety Specifications.
3.13 powered walk-behind rotary tiller: A tilling machine with powered rotary tines, with or without traction drive, that is intended to break up soil and is controlled by the operator walking behind the machine.
3.13.1 front tine: A powered walk-behind rotary tiller designed to be operator controlled, with support wheels whose ground traction is provided by its forward positioned rotating tines.
3.13.2 rear tine: A powered walk-behind rotary tiller whose ground traction is provided by the drive wheels and whose rotating tines are behind the drive wheels.
3.13.3 traction drive: A mechanical drive system with independent control that powers the drive wheels.
3.14 shall: The word “shall” is to be understood as a requirement.
3.15 should: The word “should” is to be understood as a recommendation.
3.16 test operator: An operator with the dimensions and reach as shown in figure 1.
3.17 tine barrier: Structural members, such as transport wheels, portions of the tiller frame, ground stake, or any combination of these members, that restrict entry of the operator into the rotating tines.
3.18 tines: That portion of the rotating member that engages and penetrates the soil.
4 Machine identification
The machine shall be provided with identification giving at minimum the following information:
a) Name of the manufacturer or supplier,
b) Markings that uniquely identify the machine (such as, model and/or serial number), and
c) Contact information for a source of replacement parts.
The label(s) shall meet the durability requirements of clause 10.
5 Controls
5.1 Control location
Controls and actuating devices should be so designed and located as to prevent hazardous conditions, such as pinching or cutting the operator during their normal operation.
5.2 Resistance to movement
During normal operation of the machine, all controls specified in 5.3.1, except the operator presence (normally off) control, should remain in the position set by the operator. The motion or vibration of the tiller or hand-supported cultivator should not cause these controls to move from their selected design position.
5.3 Control identification
5.3.1 The following controls, if provided, for tine speed, tine direction, engine (motor) speed, engine (motor) shutoff, traction speed, tine engagement, emergency stop control and traction drive engagement and direction shall be identified by a durable label as to direction of operation and function. Universal symbols, as illustrated in SAE J1362, ANSI/ASAE S304.5, ISO 3767-1, and ISO 3767-3, may be used.
5.3.2 Identification shall be located near the control position and be legible to the operator.
5.3.3 Identification using lettering shall use a minimum letter height of 3 mm (0.115 in).
5.4 Shutoff control device
A shutoff control device shall be provided to stop operation of the engine (motor). This device shall require manual and intentional activation in order to start the engine (motor). A key switch, or similar device, shall be provided to prevent unauthorized starting of the engine (motor), unless manual start is the only means of starting the engine (motor). The shutoff control device and the key switch, or similar device, may be combined in one control.ANSI B71.8 pdf download.
