Echo 2CS-450 用户手册

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CS-450

•  It is believed that a condition called Raynaud’s 

Phenomenon, which affects the fingers of certain 

individuals, may be brought about by exposure to 

vibration and cold.    

 

 

Exposure to vibration and cold may cause tingling 

and burning followed by loss of color and numbness 

in the fingers. The following precautions are strongly 

recommended because the minimum exposure 

which might trigger the ailment is unknown. 

•  Keep your body warm, especially the head and 

neck, feet and ankles and hands and wrists. 

•  Maintain good blood circulation by performing vigor-

ous arm exercises during frequent work breaks and 

also by not smoking. 

•  Limit the number of hours of operation. Try to fill 

each day with jobs where operating the chain saw, 

or other hand-held power equipment is not required. 

•  If you experience discomfort redness and swelling 

of the fingers, followed by whitening and loss of 

feeling, consult your physician before further expos-

ing yourself to cold and vibration.

•  It is believed that over-using the muscles and ten-

dons of the finger, hands, arms and shoulders may 

cause soreness, swelling, numbness, weakness 

and extreme pain to the areas just mentioned.  

Certain repetitive hand activities may put you at a 

high risk for developing a repetitive stress injury 

(RSI).

•  An extreme RSI condition is Carpal Tunnel Syn-

drome (CTS) which could occur when your wrist 

swells and squeezes a vital nerve that runs through 

the area. Some believe that prolonged exposure to 

vibration may contribute to CTS. CTS can cause 

severe 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 twisted 

position. 

•  Take periodic breaks to minimize repetition and rest 

your hands. 

•  Reduce the speed and force in which you do the 

repetitive movement. 

•  Do exercises to strengthen hand and arm muscles.

•  See a doctor if you feel tingling, numbness or pain in 

your fingers, hands, wrists or arms. The sooner RSI/

CTS is diagnosed, the more likely permanent nerve 

and muscle damage can be prevented.

•  Wear eye protection goggles that meet ANSI   

Z 87.1 requirements.   

 

 

 

Goggles meeting the requirements have the mark “Z 

87” stamped on them.

•  Wear hearing protection.  

 

 

 

If this guideline is not followed, hearing loss can oc-

cur.    

 

 

 

 

 

ECHO recommends wearing hearing protection at all 

times. 

•  Snug fitting durable clothing should be worn.  Pants 

should 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 moving parts.

•  Wear shoes with non-skid soles. DO NOT wear open 

toed shoes or operate unit barefooted.

•  Wear no-slip, heavy duty work gloves to improve your 

grip on the chain saw handles. The gloves also help 

reduce the transmission of machine vibration to your 

hands.

•  Heavy protective clothing can increase operator 

fatigue which may lead to heat stroke.  

 

 

Schedule heavy work for early morning, or late 

afternoon hours when temperatures are cooler.

•  During operation, the muffler or catalytic muffler and 

surrounding cover become hot.

•  Never suspend the saw on a lanyard with the engine 

running.

•  Always use the saw from the right-hand side of your 

body - 

NEVER from the left side.

•  Always wear proper safety clothing to protect your 

lower body from sharp saw chain and hot muffler.

•  Always keep exhaust area clear of flammable debris 

during transportation or when storing, otherwise seri-

ous property damage or personal injury may result.

The ignition components of this machine generate an electromagnetic field during operation which may in-

terfere with some pacemakers.  To reduce the risk of serious or fatal injury, persons with pacemakers should 

consult with their physician and the pacemaker manufacturer before operating this machine.   In the absence 

of such information, ECHO does not recommend the use of ECHO products by anyone who has a pacemaker.