Foreword

4Snow thrower safety requirements and test procedures

4.1General

4.2Controls

4.2.1General

4.2.2Engine stopping and starting

4.2.2.1Starting device

4.2.2.2Stopping device

4.2.2.3Hand-operated

4.2.2.4Foot-operated

4.2.2.5Drive interlock for starting

4.2.2.6Engine speed

4.2.3Collector and impeller control

4.2.3.1Operator-presence control

4.2.3.2Stopping time

4.2.3.3Impeller or traction engagement control

4.2.3.4Impeller controls tests

4.2.3.4.1Test procedure

4.2.3.4.2Test acceptance

4.2.4Directional control

4.2.5Clutch control requirements for traction clutch or neutral, or both

4.2.5.1General

4.2.5.2Foot pedal control

4.2.5.3Hand-operated control

4.2.5.4Operator-presence control

4.2.5.5Traction clutch

4.2.5.6Lever-steer

4.2.6Traction speed control

4.2.7Steering control

4.2.7.1General

4.2.7.2Steering lever(s) on lever-steer machines

4.2.7.3Lever-steer machines with two control levers

4.2.7.4Lever-steer machines with a single control lever with lateral displacement for steering control

4.2.7.5Lever-steer machines with a single control lever with rotational displacement for steering control

4.2.8Operator-presence control (OPC)

4.2.8.1General

4.2.8.2Restart of the collector and impeller

4.2.8.3Restart of the collector and impeller before complete stop

4.2.8.4Automatic or single action stopping and starting of the collector and impeller

4.3Guards, shields, chutes, deflectors and housings

4.3.1General

4.3.2Hot surfaces

4.3.3Engine exhaust

4.4Fuel

4.4.1Fuel tank overfill test

4.4.2Fuel line axial pull test

4.5Electrical equipment: battery-powered circuits (not including magneto grounding circuits)

4.5.1Insulated cables

4.5.2Battery installation

4.5.3Overload protection

4.5.4Terminals and non-insulated electrical parts

4.6Power drive

4.7Probe test

4.7.1Test procedure

4.7.2Test acceptance

4.8Electromagnetic immunity

4.9Noise

4.10Vibration