9 CS-450PVIBRATION AND COLD• It is believed that a condition called Raynaud’sPhenomenon, which affects the fingers of certainindividuals, may be brought about by exposure tovibration and cold.Exposure to vibration and cold may cause tinglingand burning followed by loss of color and numbnessin the fingers. The following precautions are stronglyrecommended because the minimum exposurewhich might trigger the ailment is unknown.• Keep your body warm, especially the head andneck, feet and ankles and hands and wrists.• Maintain good blood circulation by performing vigor-ous arm exercises during frequent work breaks andalso by not smoking.• Limit the number of hours of operation. Try to filleach day with jobs where operating the chain saw,or other hand-held power equipment is not required.• If you experience discomfort redness and swellingof the fingers, followed by whitening and loss offeeling, consult your physician before further expos-ing yourself to cold and vibration.REPETITIVE STRESS INJURY• It is believed that over-using the muscles and ten-dons of the finger, hands, arms and shoulders maycause soreness, swelling, numbness, weaknessand extreme pain to the areas just mentioned.Certain repetitive hand activities may put you at ahigh risk for developing a repetitive stress injury(RSI).• An extreme RSI condition is Carpal Tunnel Syn-drome (CTS) which could occur when your wristswells and squeezes a vital nerve that runs throughthe area. Some believe that prolonged exposure tovibration may contribute to CTS. CTS can causesevere pain for months or even years.To reduce the risk of RSI/CTS, do the following:• Avoid using your wrist in a bent, extended or twistedposition.• Take periodic breaks to minimize repetition and restyour hands.• Reduce the speed and force in which you do therepetitive movement.• Do exercises to strengthen hand and arm muscles.• See a doctor if you feel tingling, numbness or pain inyour fingers, hands, wrists or arms. The sooner RSI/CTS is diagnosed, the more likely permanent nerveand muscle damage can be prevented.EYE AND HEARING PROTECTION• Wear eye protection goggles that meet ANSIZ 87.1 requirements.Goggles meeting the requirements have the mark “Z87” stamped on them.• Wear hearing protection.If this guideline is not followed, hearing loss can oc-cur.ECHO recommends wearing hearing protection at alltimes.WEAR PROPER CLOTHING• Snug fitting durable clothing should be worn. Pantsshould have long legs, DO NOT WEAR SHORTS.Do not wear loose fitting clothing, scarves, neckties,jewelry or any item that may become tangled in sur-rounding growth or the chain saw itself.• Wear shoes with non-skid soles. DO NOT wear opentoed shoes or operate unit barefooted.• Wear no-slip, heavy duty work gloves to improve yourgrip on the chain saw handles. The gloves also helpreduce the transmission of machine vibration to yourhands.HOT HUMID WEATHER• Heavy protective clothing can increase operatorfatigue which may lead to heat stroke.Schedule heavy work for early morning, or lateafternoon hours when temperatures are cooler.AVOID HOT SURFACES• During operation, the muffler or catalytic muffler andsurrounding cover become hot.• Never suspend the saw on a lanyard with the enginerunning.• Always use the saw from the right-hand side of yourbody - NEVER from the left side.• Always wear proper safety clothing to protect yourlower body from sharp saw chain and hot muffler.• Always keep exhaust area clear of flammable debrisduring transportation or when storing, otherwise seri-ous property damage or personal injury may result.OPERATOR SAFETYWARNINGMoving parts can amputate fingers or cause severe injuries. Keep hands, clothing and loose objects away fromall openings.• ALWAYS stop engine, disconnect spark plug, and make sure all moving parts have come to a complete stopbefore removing obstructions, clearing debris, or servicing unit.• DO NOT start or operate unit unless all guards and protective covers are properly assembled to unit.• NEVER reach into any opening while the engine is running. Moving parts may not be visible through openings.